JPH09308127A - Charge mode changing adaptor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a charge mode changing adaptor which can charge a sealed lead storage battery, using a quasi-constant-voltage charger on hand. SOLUTION: A current application circuit 8 including a switching circuit 7 is connected between a DC/DC converter 5 which receives the input of a quasi-constant-voltage charger 2 and output terminals 6a and 6b connected to a sealed lead storage battery 3. A control circuit 9 which controls the DC/DC converter 5 and the switching circuit 7 controls the output voltage of the DC/DC converter 5 so that it may be a several times as high at the nominal voltage of the sealed lead storage battery 3 only for a given time when this judges that the sealed lead storage battery 3 is in overdischarge condition, and also generates pulse voltage by turning on-and-off the switching circuit 7, and after passage of a given time, this controls the output voltage of the DC/DC converter 5 so that it may step down to the voltage required for charging the sealed lead storage battery 3 with constant voltage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealed lead acid battery (sealed lead acid battery) using the output of a quasi-constant voltage charging device as an input.
The present invention relates to a charging mode changing adapter for charging a battery with a constant voltage.

[0002]

2. Description of the Related Art Conventionally, a constant current / constant voltage charging device has been used as a charging device for charging a sealed lead acid battery.

[0003]

However, the constant current / constant voltage charging device has an expensive problem.

Therefore, it is desired to charge the sealed lead-acid battery by using a hand-held inexpensive quasi-constant voltage charging device for charging the liquid open-type lead-acid battery.

However, when a quasi-constant voltage charging device is used to charge a sealed lead-acid battery having the same nominal voltage, the charging voltage becomes higher than the voltage for charging the sealed lead-acid battery at the end of charging, so oxygen gas Is greater than the permissible amount absorbed by the cathode plate of the sealed lead-acid battery, the pressure inside the battery increases, and gas continues to escape from the safety valve. If such a state continues, the water in the electrolytic solution decreases, and the state of liquid leakage occurs, which adversely affects the battery life. Therefore, there is a problem that the quasi-constant voltage charging device cannot be used for charging the sealed lead-acid battery.

It is an object of the present invention to provide a charge mode changing adapter capable of charging a sealed lead-acid battery using a hand-held quasi-constant voltage charging device.

[0007]

The present invention has an input terminal to which the output of a quasi-constant voltage charging device is supplied and an output terminal connected to the output terminal of a sealed lead-acid battery, the quasi-constant voltage charging. The present invention relates to a charging mode change adapter for charging a sealed lead-acid battery at a constant voltage with the output of the device as an input.

A charging mode changing adapter according to a first aspect of the present invention is a DC / DC converter for converting a voltage input from an input terminal into a desired voltage, and a switching arranged between the DC / DC converter and the output terminal. An energizing circuit including a circuit, a control circuit for controlling the DC / DC converter and the switching circuit, and a voltage detection circuit for detecting the battery voltage of the sealed lead-acid battery, the control circuit being a battery detected by the voltage detection circuit. It is determined from the voltage whether or not the sealed lead acid battery is over-discharged, and when it is determined that the sealed lead acid battery is over-discharged, DC / DC for a predetermined time
The DC / DC converter is controlled so that the output voltage of the converter is several times the nominal voltage of the sealed lead-acid battery, the switching circuit is turned on / off to generate the pulse voltage, and after a predetermined time has passed, Controls the DC / DC converter so as to reduce the output voltage of the DC / DC converter to the voltage required for constant voltage charging of the sealed lead acid battery, and applies the constant voltage required for constant voltage charging to the sealed lead acid battery. In order to control the DC / DC converter and the switching circuit to determine that the sealed lead acid battery is not over-discharged, the output voltage of the DC / DC converter is the voltage required to charge the sealed lead acid battery at a constant voltage. DC / DC to control the DC / DC converter so as to step down the voltage and apply the constant voltage required for constant voltage charging to the sealed lead-acid battery. Characterized in that it is configured to control the inverter and the switching circuit.

Such a charging mode changing adapter determines whether or not the sealed lead acid battery is in an overdischarged state based on the battery voltage of the sealed lead acid battery detected by the voltage detection circuit, and determines whether the sealed lead acid battery is overcharged. When it is determined that the battery is in the discharged state, the DC / DC converter is controlled so that the output voltage of the DC / DC converter is several times the nominal voltage of the sealed lead-acid battery for a predetermined time, and the switching circuit is turned on / off. After the pulse voltage is generated and after a lapse of a predetermined time, the DC / DC converter is controlled so as to reduce the output voltage of the DC / DC converter to a voltage required to charge the sealed lead storage battery at a constant voltage. DC / DC to apply the constant voltage required for constant voltage charging to the sealed lead-acid battery
Control converters and switching circuits.

Therefore, when the sealed lead acid battery is in an over-discharged state, a pulse voltage which is several times the nominal voltage of the sealed lead acid battery is first applied to the sealed lead acid battery to reduce the internal resistance, and then the It is possible to perform constant voltage charging with a voltage required for constant voltage charging of a sealed lead acid battery.

On the other hand, when it is determined that the sealed lead acid battery is not in the over-discharged state, the output voltage of the DC / DC converter is reduced to the voltage required to charge the sealed lead acid battery to a constant voltage by DC / DC. The DC / DC converter and the switching circuit are controlled to control the converter and apply a constant voltage required for constant voltage charging to the sealed lead-acid battery.

Therefore, when the sealed lead acid battery is not over-discharged, constant voltage charging can be performed from the beginning with the voltage required to charge the sealed lead acid battery with constant voltage.

A charging mode changing adapter according to a second aspect of the present invention is a DC / DC converter for converting a voltage input from an input terminal into a desired voltage, and a switching arranged between the DC / DC converter and the output terminal. An energizing circuit including a circuit, a control circuit for controlling the DC / DC converter and the switching circuit, and a voltage detection circuit for detecting the battery voltage of the sealed lead-acid battery, the control circuit being a battery detected by the voltage detection circuit. Overdischarge state detecting means for determining whether the sealed lead-acid battery is in the overdischarge state or not, and output of the DC / DC converter for a predetermined time when the overdischarge state detecting means determines the overdischarge state DC / DC so that the voltage is several times the nominal voltage of the sealed lead-acid battery
First control command generating means for outputting a control command for controlling the converter and turning on / off the switching circuit to apply a pulse voltage having a predetermined pulse width to the sealed lead-acid battery to the DC / DC converter and the switching circuit. The output voltage of the DC / DC converter is changed to the sealed type when the overdischarge state detection means determines that the sealed lead-acid battery is not in the overdischarged state and after the output operation of the control command from the first control command generation means is stopped. The DC / DC converter is controlled to step down the lead acid battery to the voltage required for constant voltage charging, and the DC / DC converter and the switching circuit are controlled to apply the constant voltage required for constant voltage charging to the sealed lead acid battery. Second control command generating means for outputting a control command to the DC / DC converter and the switching circuit, and charging from the battery voltage Characterized by comprising a charge stopping means for stopping the operation of the second control command generation means detects the period.

In such a charging mode changing adapter, the overdischarge state detecting means determines whether or not the sealed lead acid battery is in an overdischarged state from the battery voltage of the sealed lead acid battery detected by the voltage detection circuit, When the over-discharged state detection means determines that the over-discharged state is present, DC /
The DC / DC converter is controlled so that the output voltage of the DC converter is several times the nominal voltage of the sealed lead acid battery, and the switching circuit is turned on / off to apply a pulse voltage with a predetermined pulse width to the sealed lead acid battery. The control command to be output is output from the first control command generating means to the DC / DC converter and the switching circuit. Therefore, first, a pulse voltage that is several times the nominal voltage of the sealed lead acid battery is applied to the sealed lead acid battery to reduce the internal resistance, and then the voltage required to charge the sealed lead acid battery with a constant voltage. Can be charged with a constant voltage.

Further, in the charging mode changing adapter, when the overdischarge state detecting means determines that the sealed lead storage battery is not in the overdischarge state and the output operation of the control instruction from the first control instruction generating means is stopped. After that, the DC / DC converter is controlled so as to reduce the output voltage of the DC / DC converter to the voltage required for constant voltage charging of the sealed lead acid battery, and the constant voltage required for constant voltage charging is applied to the sealed lead acid battery. In order to control the DC / DC converter and the switching circuit, a control command for controlling the DC / DC is generated from the second control command generating means.
Since it outputs to the DC converter and the switching circuit,
From the beginning, it is possible to perform constant voltage charging with the voltage required for constant voltage charging of the sealed lead acid battery.

Further, the charge stop means can detect the end of charge from the battery voltage and stop the operation of the second control command generating means.

In the charging mode changing adapter according to the present invention, the input terminal is provided with a constricted portion.

When the constricted portion is provided on the input terminal as described above, the constricted portion of the input terminal is gripped by the clip at the tip of the output cord of the quasi-constant voltage charging device, so that the output cord of the quasi-constant voltage charging device is retained. It can be easily connected to the input terminal of the charging mode change adapter.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION FIGS. 1 to 3 (A) (B) (C)
FIG. 4 shows a first example of an embodiment of a charging mode changing adapter according to the present invention.

The charging mode changing adapter 1 of this example is shown in FIG.
As shown in, a quasi-constant voltage charging device 2 and a sealed lead-acid battery 3
It is used by interposing between and.

As shown in FIG. 1, the charging mode changing adapter 1 includes an input terminal 4 of the charging mode changing adapter 1.
DC / DC converter 5 for converting the output voltage of the quasi-constant voltage charging device 2 input from a and 4b into a desired voltage, the DC / DC converter 5, and the charging mode changing adapter 1
An energization circuit 8 including a switching circuit 7 arranged between the output terminals 6a and 6b of the control circuit 6, a control circuit 9 for controlling the DC / DC converter 5 and the switching circuit 7, and a battery voltage of the sealed lead-acid battery 3 are detected. And a voltage detection circuit 10 that operates.

As shown in FIG. 1, the control circuit uses the sealed lead storage battery 3 based on the battery voltage detected by the voltage detection circuit 10.
Is in the over-discharged state, and when the over-discharged state detection means 11 determines that the over-discharged state is in the over-discharged state, the output voltage of the DC / DC converter 5 is kept for a predetermined time. Control of controlling the DC / DC converter 5 so as to be several times the nominal voltage of the sealed lead acid battery 3 and turning on / off the switching circuit 7 to apply a pulse voltage of a predetermined pulse width to the sealed lead acid battery 3. When the first control command generating means 12 for outputting a command to the DC / DC converter 5 and the switching circuit 7 and the overdischarge state detecting means 11 determine that the sealed lead-acid battery 3 is not in the overdischarge state, and After the output operation of the control command from the control command generation means 12 is stopped, the output voltage of the DC / DC converter 5 is stepped down to a voltage required for constant voltage charging of the sealed lead storage battery 3. The DC / DC converter 5 and the switching circuit 7 are controlled by the DC / DC converter 5 and the switching circuit 7 in order to apply the constant voltage required for constant voltage charging to the sealed lead-acid battery 3 as described above. The second control command generating means 13 for outputting to the switching circuit 7 and the second end by detecting the end of charge from the battery voltage
And a charge stopping means 14 for stopping the operation of the control command generating means 13 of FIG.

Input terminal 4 of charging mode changing adapter 1
a and 4b, as shown in FIGS. 3 (A), (B), and (C),
Constricted portions 4ac and 4bc are provided respectively.

Next, the charging operation by the charging mode changing adapter 1 will be described. In the charging mode changing adapter 1, the overdischarge state detecting means 11 determines whether the sealed lead acid battery 3 is in the overdischarged state or not based on the battery voltage of the sealed lead acid battery 3 detected by the voltage detection circuit 10. . When the over-discharged state detecting means 11 determines that it is in the over-discharged state, the output voltage of the DC / DC converter 5 becomes several times (for example, three times or more) the nominal voltage of the sealed lead-acid battery 3 for a predetermined time. So that the DC / DC converter 5
The first control command generating means 12 outputs a control command for controlling the boosting of the voltage and for turning on / off the switching circuit 7 to apply a pulse voltage having a predetermined pulse width to the sealed lead-acid battery 3.
To the DC / DC converter 5 and the switching circuit 7. Therefore, first, a pulse voltage that is several times the nominal voltage of the sealed lead acid battery 3 is applied to the sealed lead acid battery 3 to reduce the internal resistance, and then the sealed lead acid battery 3 is charged with a constant voltage. It can be charged at a constant voltage with the required voltage. When charging is performed in this manner, the heat generation of the sealed lead-acid battery 3 during charging is small, the amount of gas generated is reduced even at the end of charging, and there is no adverse effect on the battery life, and good results were obtained. .

Further, the charging mode changing adapter 1 is used when the overdischarge state detecting means 11 determines that the sealed lead-acid battery 3 is not in the overdischarge state and when the first control command generating means 12 is used.
After the output of the control command from the
The DC / DC converter 5 is controlled so that the output voltage of the converter 5 is stepped down to the voltage required for constant voltage charging of the sealed lead acid battery 3, and the constant voltage required for constant voltage charging is applied to the sealed lead acid battery 3. DC / DC converter 5
And a control command for controlling the switching circuit 7 is output from the second control command generating means 13 to the DC / DC converter 5 and the switching circuit 7. In this case, the sealed lead-acid battery 3 can be charged with a constant voltage from the beginning at a voltage required for constant voltage charging.

The charging stopping means 14 detects the end of charging from the battery voltage and stops the operation of the second control command generating means 13.

When using such a charging mode changing adapter 1, an input terminal 4 of the charging mode changing adapter 1 is used.
When the constricted portions 4ac and 4bc are provided on the a and 4b, the constricted portions 4ac and 4b of the input terminals 4a and 4b are clipped by the clip at the tip of the output cord (not shown) of the quasi-constant voltage charging device 2.
By grasping 4 bc, the output code of the quasi-constant voltage charging device 2 is changed to the input terminal 4 of the charging mode changing adapter 1.
It can be easily connected to a and 4b.

4A to 4C show a sealed lead-acid battery 3
3 shows an operation waveform by the charging mode changing adapter 1 when the is in the over-discharged state.

That is, FIGS. 4A and 4B show the charging mode changing adapter 1 when the sealed lead-acid battery 3 is in the over-discharged state.
4 shows the output voltage waveform and the output current waveform, and FIG. 4 (C) shows the battery voltage waveform of the sealed lead-acid battery 3 at this time.

[0030]

Since the charging mode changing adapter according to the present invention has a built-in DC / DC converter, it is stable from the output of the adapter without being influenced by the fluctuation of the output voltage of the quasi-constant voltage charging device. It is possible to obtain a voltage, which allows it to be connected to any quasi-constant voltage charging device for constant voltage charging of a sealed lead acid battery.

Further, since the charging mode changing adapter automatically switches the pulse charging and the constant voltage charging inside the battery in the state of the battery, it is possible to recover the over-discharged battery left in the initial stage of charging, At the end of charging, the amount of gas generated can be reduced by constant voltage charging.

Further, according to the charging mode changing adapter of the present invention, the sealed lead-acid battery can be charged with a constant voltage by using the quasi-constant voltage charging device that is held by the user.

Further, by providing a constricted portion at the input terminal of the charging mode changing adapter, the constricted portion of the output terminal of the quasi-constant voltage charging device is gripped at the constricted portion of the input terminal so that the quasi-constant voltage charging is performed. The output cord of the device can be easily connected to the input terminal of the charging mode changing adapter.

[Brief description of drawings]

FIG. 1 is a block diagram showing an example of an embodiment of a charging mode changing adapter according to the present invention.

FIG. 2 is a block diagram showing an example of an internal configuration of a control circuit used in FIG.

3A is a front view of a charging mode changing adapter used in this example, FIG. 3B is a side view of FIG. 3A, and FIG. 3C is a perspective view of an input terminal used in this charging mode changing adapter. It is a figure.

4A and 4B are diagrams showing an output voltage waveform and an output current waveform of a charge mode changing adapter when the sealed lead acid battery is in an overdischarged state, and FIG. 4C is a sealed lead acid battery at this time. It is a figure which shows the battery voltage waveform of.

[Explanation of symbols]

 1 Charging Mode Change Adapter 2 Quasi-Constant Voltage Charging Device 3 Sealed Lead Acid Battery 4a, 4b Input Terminal 4ac, 4bc Constriction 5 DC / DC Converter 6a, 6b Output Terminal 7 Switching Circuit 8 Energizing Circuit 9 Control Circuit 10 Voltage Detection Circuit 11 Over-discharge state detecting means 12 First control command generating means 13 Second control command generating means 14 Charge stopping means

Claims (3)

[Claims] 1. A hermetically sealed battery having an input terminal to which an output of a quasi-constant voltage charging device is supplied and an output terminal connected to an output terminal of a sealed lead-acid battery, with the output of the quasi-constant voltage charging device as an input. A charging mode changing adapter for charging a lead-acid battery at a constant voltage, comprising: a DC / DC converter for converting a voltage input from the input terminal into a desired voltage, and between the DC / DC converter and the output terminal. A control circuit for controlling the DC / DC converter and the switching circuit; and a voltage detection circuit for detecting a battery voltage of the sealed lead-acid battery, the control circuit comprising: The sealed lead-acid battery is over-discharged from the battery voltage detected by the voltage detection circuit to determine whether the sealed lead-acid battery is in an over-discharged state. When it is determined that the DC / DC converter is controlled so that the output voltage of the DC / DC converter is several times the nominal voltage of the sealed lead-acid battery for a predetermined time, the switching circuit is turned on / off. Generate a pulse voltage,
After the lapse of the predetermined time, the DC / DC converter is controlled so that the output voltage of the DC / DC converter is stepped down to a voltage required to charge the sealed lead-acid battery at a constant voltage, and the constant voltage is controlled. DC / DC for applying a constant voltage required for voltage charging to the sealed lead-acid battery
When controlling the converter and the switching circuit and determining that the sealed lead storage battery is not in an over-discharged state, the output voltage of the DC / DC converter is adjusted to a voltage required to charge the sealed lead storage battery at a constant voltage. The DC / DC converter is controlled to step down, and the DC / DC converter and the switching circuit are controlled to apply a constant voltage required for the constant voltage charging to the sealed lead-acid battery. Charging mode change adapter characterized by that. 2. The hermetically sealed battery having an input terminal to which an output of the quasi-constant voltage charging device is supplied and an output terminal connected to an output terminal of a sealed lead-acid battery, and the output of the quasi-constant voltage charging device as an input. A charging mode changing adapter for charging a lead-acid battery at a constant voltage, comprising: a DC / DC converter for converting a voltage input from the input terminal into a desired voltage, and between the DC / DC converter and the output terminal. A control circuit for controlling the DC / DC converter and the switching circuit; and a voltage detection circuit for detecting a battery voltage of the sealed lead-acid battery, the control circuit comprising: An overdischarge state detecting means for determining whether or not the sealed lead acid battery is in an overdischarge state from the battery voltage detected by the voltage detection circuit; When the detection means determines that the DC / DC converter is in the over-discharged state, the DC / DC converter is controlled so that the output voltage of the DC / DC converter is several times the nominal voltage of the sealed lead-acid battery for a predetermined time. First control command generating means for outputting a control command for turning on / off a switching circuit to apply a pulse voltage having a predetermined pulse width to the sealed lead-acid battery to the DC / DC converter and the switching circuit; The output voltage of the DC / DC converter when the over-discharged state detection means determines that the lead-acid battery is not in the over-discharged state and after the output operation of the control instruction from the first control instruction generation means is stopped. And controlling the DC / DC converter so as to step down the sealed lead-acid battery to a voltage required for constant voltage charging. Second control command generation for outputting a control command for controlling the DC / DC converter and the switching circuit to apply a constant voltage required for voltage charging to the sealed lead-acid battery to the DC / DC converter and the switching circuit A charging mode changing adapter comprising: means and a charging stopping means for detecting the end of charging from the battery voltage and stopping the operation of the second control command generating means. 3. The charging mode changing adapter according to claim 1, wherein the input terminal is provided with a constricted portion.