JPH0318781A - Battery checking system - Google Patents

Abstract

PURPOSE:To easily execute the check by detecting the deterioration and the charge/discharge state of a battery from a variation of a terminal voltage of the battery at the time when electric power is supplied to a load from the battery. CONSTITUTION:At the time of power stoppage of a commercial AC power source 2, a voltage converting part 4 converts a voltage of a battery 5 by DC/DC conversion, and generates an output voltage V2. When a battery checking signal is applied from the outside in a state that the commercial AC power source 2 is on, a control circuit 8 controls the voltage converting part 4 and outputs a higher output voltage than an output voltage of a rectifying circuit 1 from the voltage converting part 4. In this state, electric power is supplied to a load through the voltage converting part 4 and a voltage converting part 3 from the battery 5, but it does not occur that electric power is supplied through the rectifying circuit 1 from the commercial AC power source 2. Accordingly, by checking a state of a variation of a terminal voltage of the battery 5, the deterioration and the charge/discharge state of the battery can be checked.

Description

[Detailed Description of the Invention] [Summary] Regarding a battery check method for detecting battery deterioration and charge/discharge status in a power supply device that provides battery support, a pseudo load is connected to the supply voltage from a backup power battery. The purpose is to supply power to an actual load and check the deterioration and charging/discharging status in this state without causing any damage. and a voltage conversion unit that converts the battery voltage and generates an output during a power outage, and the TA device combines both outputs and supplies the output to a load, the voltage conversion unit converting the voltage in response to an external signal during a non-power outage of the AC power supply. A control circuit is provided to output an output voltage higher than the output voltage of the rectifier circuit from the part, and the deterioration and charge/discharge state of the battery are detected from changes in the terminal voltage of the battery when power is supplied from the battery to the load. There is.

[Industrial application field]

The present invention relates to a battery check method for detecting battery deterioration and charge/discharge status in a power supply device that provides battery support.

2. Description of the Related Art In a memory device of an electronic computer, it is necessary to retain stored data even during a power outage of the device. Therefore, a backup power source using a battery is provided separately from the power source of the device main body, so that power can be continuously supplied to the memory device and the like even in the event of a power outage.

In order to ensure that power supplies that provide battery support during power outages can perform their functions satisfactorily in the event of a power outage, they must be regularly checked for battery deterioration and charging/discharging status to ensure that they are always in good condition. It is necessary to monitor the situation.

In this case, it is desired that the deterioration and charging/discharging state of the backup power battery can be easily checked using an actual load without using a pseudo load or the like.

(Prior art) Conventionally, in a power supply device that provides battery support, the voltage supplied from the battery is constant, and by making the voltage of the common power supply that rectifies and supplies commercial power higher than the voltage supplied from the battery. , power is always supplied to the load from the commercial power supply side.

In this way, in a power supply device that provides conventional battery support, the supply voltage from the backup power battery is:
Since the voltage is lower than the voltage of the regular power supply that rectifies and supplies commercial AC power, the battery cannot supply power to the load as long as the commercial AC power is supplied.

On the other hand, in a power supply device using a battery, the deterioration and charging/discharging state of the battery are generally checked by the change in voltage when a load is actually applied to the battery.

However, in the conventional power supply device that provides battery support, it is not possible to supply power from the backup power supply battery to the actual load while commercial AC power is being supplied as described above.

Therefore, it is not possible to check battery deterioration and charging status using an actual load, and there is a method to check by temporarily connecting a dummy load to the supply voltage from the battery and letting it consume power. It is taken.

(Problems to be Solved by the Invention) However, using a pseudo load to check the battery is complicated and causes an increase in cost.

The present invention aims to solve the problems of the prior art, and is designed to supply power to an actual load without connecting a dummy load to the supply voltage from a backup power battery, and to prevent deterioration in this state. The purpose is to make it possible to check the charging and discharging status.

[Means to solve the problem]

As shown in FIG. 1, the present invention is a power supply device that includes a rectifier circuit 1 and a voltage converter 4, combines the outputs of both circuits, and supplies the output to a load. This system detects the deterioration and charge/discharge status of the battery from changes in the terminal voltage of the battery when power is supplied to the load.

The rectifier circuit 1 rectifies an input commercial AC power source and generates an output.

The voltage converter 4 converts the voltage of the battery during a power outage of the commercial AC power supply and generates an output.

Further, the control circuit 8 performs control so that the voltage converter 4 outputs an output voltage higher than the output voltage of the rectifier circuit 1 in response to an external signal during a non-interruption of the commercial AC power supply.

[Effect]

The rectifier circuit 1 rectifies a commercial AC tiffj2 to generate an output voltage Vl. In addition, the voltage converter 4 is connected to the commercial AC power supply 2.
During a power outage, the voltage of the battery 5 is converted by DC/DC conversion to generate an output voltage v2. The output of the voltage converter 4 is coupled to the output of the rectifier circuit 1 via a diode 6, and is input to the voltage converter 3. The voltage converter 3 normally converts the output of the rectifier circuit 1, and during a power outage of the commercial AC power supply, converts the output of the voltage converter 4 to generate an output and supply it to the load.

When the control circuit 8 receives a battery check signal from the outside while the commercial AC power supply 2 is not out of power, it controls the voltage converter 4 and outputs an output voltage higher than the output voltage of the rectifier circuit 1 from the voltage converter 4. let

In this state, power is supplied from the battery 5 to the load via the voltage converter 4 and the voltage converter 3, but no power is supplied from the commercial AC power supply 2 via the rectifier circuit 1.

Therefore, by checking the change in the terminal voltage of the battery 5 in this state, the degree of deterioration and charging/discharging state of the battery 5 can be determined.

〔Example〕

FIG. 2 shows the configuration of an embodiment of the present invention.

A rectifier circuit 1 rectifies a commercial AC power supply 2 to generate a DC voltage V1. Reference numeral 3 denotes a voltage converting section consisting of a DC/DC converter or the like, which converts the DC voltage 1 to generate a required voltage and supplies it to the load.

Reference numeral 4 denotes a voltage converting section consisting of a DC/DC converter or the like, which converts the voltage of the battery 5 and generates a DC voltage 2. The diode 6.6A couples the output of the voltage converter 4 and the output of the rectifier circuit 1.

The DC voltage (2) is usually set slightly lower than the DC voltage (2), but it does not necessarily have to be lower.

Reference numeral 7 denotes a power outage detection unit that detects a power outage state of the commercial AC power supply 2. A control circuit 8 controls the voltage conversion operation in the voltage conversion section 4.

In the circuit shown in Fig. 2, when the commercial AC power supply 2 is normal, the DC voltage 1 generated by rectifying the commercial AC power supply in the rectifier circuit 1 is supplied to the voltage converter 3 via the diode 6A. Accordingly, the required voltage is supplied from the voltage converter 3 to the load.

When the commercial AC power supply 2 experiences a power outage, the power outage detection section 7 detects this and supplies a power outage signal to the control circuit 8 .

As a result, the control circuit 8 operates the voltage converter 4, so the voltage converter 4 converts the voltage of the battery 5 and generates the DC voltage V2. The DC voltage V2 is supplied to the voltage converter 3 through the diode 6, and the voltage converter 3 converts the DC voltage V2
converts the voltage to generate the required voltage and supply it to the load.

If the battery 5 is to be tested now, a battery check signal is given to the control circuit 8. The control circuit 8 detects the DC voltage (1) generated by the rectifier circuit 1 and controls the voltage converter 4. In this case, the control is performed by the voltage converter 4
This is done so that the DC voltage V1 generated by the rectifying circuit 10 is higher than the DC voltage Vl generated by the rectifier circuit 10 to some extent. In this state, power to the load is supplied from the voltage converter 4 via the diode 6, and power to the load is supplied from the battery 5 instead of the commercial power supply 2.

Therefore, according to the present invention, it is possible to supply power from the battery to the actual load while the commercial AC power supply is in good condition.
By looking at the change in battery terminal voltage at that time, it is possible to know the battery's deterioration and charge/discharge status.

[Effects of the Invention] As explained above, according to the present invention, by applying a battery check signal, the voltage supplied from the battery side can be temporarily made higher than the voltage supplied from the commercial AC power supply side. , it is possible to supply power from the battery to the actual load even when there is no power outage of the commercial AC power supply.

Therefore, by observing the change in the terminal voltage of the battery at that time, it is possible to check the deterioration of the battery and the charging/discharging state.

According to the method of the present invention, it is possible to check the battery for backup power supply using an actual load without using a dummy load, so the battery in the power supply device that provides battery support can be checked without the need for special equipment. This can be done extremely easily.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the basic configuration of the present invention, FIG. 2 is a diagram showing the configuration of an embodiment of the present invention, and FIG. 3 is a diagram explaining the operation of the system of the present invention. 1 is a rectifier circuit, 4 is a voltage converter, and 8 is a control circuit. Figure 1: Principle configuration diagram of Honji Akira Figure 3: Operation explanatory diagram of Honji Akira method

Claims (1)

[Claims] A rectifying circuit (1) that rectifies an AC power source to generate an output, and a voltage converter (4) that converts the voltage of a battery during a power outage of the AC power source to generate an output. In a power supply device that combines outputs and supplies them to a load, the voltage converter (4) outputs an output voltage higher than the output voltage of the rectifier circuit (1) in response to a non-power outage external signal of the AC power supply. A battery check method characterized in that a circuit (8) is provided to detect battery deterioration and charge/discharge status from changes in terminal voltage of the battery when power is supplied from the battery to a load.