JP2013206090A - Power supply controller, information system and power supply control method using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power supply controller capable of previously detecting a failure in a discharge circuit of a power storage device so as not to cause system down when commercial power supply is stopped.SOLUTION: A power supply controller according to the present invention includes a power supply circuit to supply direct current power to an information system, an auxiliary power supply, a discharge circuit to perform discharge of the auxiliary power supply and supply direct current power to the information system, and a control circuit to control the discharge circuit. The control circuit checks an operation of the discharge circuit upon starting the information system.

Description

  The present invention relates to a power supply control device and a power supply control method for a system having a power storage device. In particular, the present invention relates to stable operation of the system by ensuring the reliability of the power storage device during a commercial power failure.

  Patent Document 1 includes a main power source and an auxiliary power source composed of a rechargeable storage battery. When normal, power is supplied to the load by the main power source and the auxiliary power source is charged. When an abnormality occurs in the main power source, the auxiliary power source is provided. A backup power supply device that supplies power from a power supply to a load is disclosed. In Patent Document 1, the output voltage of the main power supply is monitored, and when the abnormality occurs in the main power supply, the auxiliary power supply is connected to the load, and the auxiliary power supply is changed from the change state of the output voltage of the auxiliary power supply when the auxiliary power supply is connected to the load. It is possible to detect the life deterioration of the power supply.

JP 2001-28844 A

  In the power supply device of Patent Document 1, since the life deterioration of the auxiliary power supply is detected when the auxiliary power supply is connected to the load, there is a problem that the power supply is stopped when a failure is detected in the auxiliary power supply.

  Generally, if the commercial power supply is normal, power is supplied from the power supply to the load, so the discharge circuit of the backup power supply does not operate. The discharge circuit in the backup power source (power storage device) can detect a malfunction of the circuit only when the backup power source is operating. The backup power supply is a power supply that operates to continue system operation when commercial power is stopped. However, a failure in the discharge circuit of the backup power supply is detected only when the discharge circuit operates when a power failure occurs. That is, there is a problem that even if a failure occurs in the discharge circuit, it cannot be detected.

  Further, when the discharge circuit is operated, the commercial power supply is stopped, and even if a failure of the discharge circuit can be detected, there is a problem that the power supply to the load is interrupted and the system is down.

  An object of the present invention is to provide a power supply control device and a power supply control method capable of detecting in advance a failure of a discharge circuit of a backup power supply so that the system is not shut down when commercial power is stopped.

  A power supply control device of the present invention includes a power supply circuit that supplies DC power to an information system, an auxiliary power supply, a discharge circuit that discharges the auxiliary power supply and supplies DC power to the information system, and a control circuit that controls the discharge circuit And the control circuit checks the operation of the discharge circuit when the information system is activated.

  A power supply control method according to the present invention includes a power supply circuit that supplies DC power to an information system, an auxiliary power supply, and a discharge circuit that discharges the auxiliary power supply and supplies DC power to the information system. In the control method, the control circuit controls the discharge circuit, and confirms the operation of the discharge circuit when the information system is activated.

  In the present invention, in order to improve the reliability of the information system, it is possible to check the operation of the backup power source every time the information system is started up. Therefore, the reliability of power supply from the backup power supply to the load is improved when the commercial power supply is stopped, and the continuity of the system operation can be ensured.

It is a block diagram which shows an example of a structure of the information system of embodiment of this invention. It is a flowchart which shows operation | movement of the power supply control apparatus in embodiment of this invention. It is a flowchart which shows operation | movement of the power supply control apparatus of a comparative example.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Constitution)
FIG. 1 is a block diagram showing a configuration of an information system 100 that uses a power supply control device according to an embodiment of the present invention.

  In the figure, an information system 100 includes a power supply control device 10 and a load 2 including a processing circuit of the information system 100. The power supply control device 10 includes an AC / DC power supply circuit 1 to which power is supplied from a commercial alternating current (AC) power supply 9 and a battery backup power supply 3.

  The AC / DC power supply circuit 1 converts AC power 11 input from a commercial AC power supply 9 into DC power 12. The AC / DC power supply circuit 1 outputs the converted DC power 12 to the load 2.

  The load 2 is operated by the DC power 12 input from the AC / DC power supply circuit 1.

  When the commercial AC power supply 9 is stopped, the AC / DC power supply circuit 1 outputs a control signal for starting the battery backup power supply 3 via the control signal line 8. As a result, the battery backup power supply 3 is activated and supplies the DC power 13 to the load 2 instead of the DC power 12 from the AC / DC power supply circuit 1. The battery backup power source 3 includes a discharge circuit 4, a battery 5 as an auxiliary power source, a charging circuit 6, and a control circuit 7.

  Part of the DC power 12 from the AC / DC power supply circuit 1 is supplied to the battery 5 through the charging circuit 6 as DC power 14. The charging circuit 6 is a circuit for charging the battery 5 with the direct current 14 supplied from the AC / DC power supply circuit 1. The charging circuit 6 converts the input DC power 14 into charging power 16 and charges the battery 5. The charging circuit 6 is preferably provided with a voltage control circuit for preventing overcharging. Further, a diode for preventing reverse current from the battery 5 may be provided. In this case, the direction from the AC / DC power supply circuit 1 toward the charging circuit 6 is the forward direction.

  The battery 5 charges the DC power 14 supplied from the AC / DC power supply circuit 1. The battery 5 is charged via the charging circuit 6. Further, the battery 5 outputs DC power to the discharge circuit 4 in order to supply DC power 13 to the load 2 when the commercial AC power supply 9 is stopped.

  The discharge circuit 4 outputs DC power 13 to the load 2 when the commercial AC power supply 9 is stopped. The discharge circuit 4 smoothes and converts the discharge power 17 discharged from the battery 5 into DC power 13 and outputs the DC power 13.

  It is desirable that the discharge circuit 4 includes a diode that prevents the DC power 14 from being input. In this case, the direction from the AC / DC power supply circuit 1 toward the discharge circuit 4 is the reverse direction. The discharge circuit 4 is preferably provided with a voltage stabilization circuit for keeping the output voltage constant.

  The diagnosis of the discharge circuit 4 is performed by the control circuit 7 when the information system 100 is activated. The control circuit 7 can perform diagnosis of the discharge circuit 4 by comparing the current value or voltage value of the DC power 13 with a reference threshold value.

  Further, the diagnosis of the discharge circuit 4 by the control circuit 7 can be determined based on the power supply state to the load 2. In that case, the control circuit 7 does not directly diagnose the discharge circuit 4 but indirectly diagnoses the discharge circuit 4 according to the power supply state to the load 2.

  The control circuit 7 monitors the state of the AC / DC power supply circuit 1 through the control signal line 8 and controls the charging circuit 6, the discharging circuit 4, and the battery 5. When the AC / DC power supply circuit 1 is operating, the control circuit 7 performs control for charging the battery 5 by inputting the DC power 14 to the charging circuit 6 according to the storage state of the battery 5. The control circuit 7 performs control to discharge the power of the battery 5 from the discharge circuit 4 when the commercial AC power supply 9 is stopped and the AC / DC power supply circuit 1 is stopped.

  In the power supply control apparatus according to the embodiment of the present invention, the control circuit 7 operates the discharge circuit 4 to diagnose the state of the discharge circuit 4 when the information system 100 is started up.

  The above is the configuration of the information system using the power supply control device of the present invention. In addition, embodiment of this invention is not necessarily limited to the above structure.

  For example, although the control circuit 7 in FIG. 1 has been described as a configuration provided inside the battery backup power supply 3, the control circuit 7 may be independent of the battery backup power supply 3. Further, the battery 5 as an auxiliary power source may be a storage battery or a capacitor device. Further, the battery backup power source 3 may be an auxiliary power source and a discharge circuit that discharges the power of the auxiliary power source and supplies auxiliary power to the load, and the charging circuit is not an essential element. In this case, the auxiliary power supply may be charged through a generator (not shown).

(Operation)
In the operation of the embodiment of the present invention, each time the information system 100 is started, the battery backup power source 3 of the power control device 10 temporarily operates to diagnose the discharge circuit 4. At this time, the control circuit 7 confirms the output of the discharge circuit 4 and improves the reliability of the information system 100. After the diagnosis of the discharge circuit 4 at the time of startup, the operation of the battery backup power supply 3 is stopped.

  Next, the operation of this embodiment will be described with reference to the flowchart of FIG. This embodiment will be described with reference to the components shown in FIG.

  In FIG. 2, the control circuit 7 monitors whether or not AC power 11 is input from the commercial AC power supply 9 to the AC / DC power supply circuit 1 when starting up the information system 100.

  When the control circuit 7 determines that the AC power 11 has been input to the AC / DC power supply circuit 1 at the time of startup, the control circuit 7 controls the discharge circuit 4 to output the DC power 13 (step S11). That is, the backup power source 3 is temporarily turned on. At this time, the AC / DC power supply circuit 1 has not been activated yet.

  By this control, the discharge circuit 4 of the battery backup power source 3 operates (step S14). At this time, the charging circuit 6 is not operating.

  The control circuit 7 diagnoses the state of the discharge circuit 4 by the operation of the discharge circuit 4 (step 13).

  When the control circuit 7 diagnoses that the state of the discharge circuit 4 is normal, the control circuit 7 starts up the AC / DC power supply circuit 1 (step 20). The AC / DC power supply circuit 1 converts the AC power 11 into DC power and starts feeding the DC power 12 to the load 2.

  Further, the control circuit 7 turns off the battery backup power source 3, that is, stops the discharge circuit 4 (step 21), and performs normal system operation.

  Further, when the control circuit 7 detects a malfunction of the discharge circuit 4 by the diagnosis of the discharge circuit 4 (Yes in step S13), the system operation can be continued by operating the AC / DC power supply circuit 1. At that time, information indicating the failure is transmitted to, for example, the load 2 so that the battery backup power source 3 in which the failure is found can be replaced with a non-defective product, and the display unit 20 provided in the load 2 displays the information of the battery backup power source 3. Information indicating a defect or information indicating the necessity of the replacement is displayed (step 22).

  Instead of the display unit 20, a display unit that displays information indicating that the battery backup power source 3 needs to be replaced may be provided in the battery backup power source 3 itself.

  According to the power supply control device of the embodiment of the present invention, even when the commercial AC power supply 9 is stopped and the DC power supply of the AC / DC power supply circuit 1 becomes impossible, the power supply from the battery backup power supply 3 System operation can be continued, leading to improved reliability.

(Operation of comparative example)
Next, an operation of a general power supply control device will be described as a comparative example with reference to the flowchart of FIG. The comparative example will be described with reference to the components shown in FIG.

  In FIG. 3, the commercial AC power supply 9 inputs AC power 11 to the AC / DC power supply circuit 1 (step 10).

  The AC / DC power supply circuit 1 converts the input AC power 11 into DC power and supplies the DC power 12 to the load 2 (step 20).

  When the commercial AC power supply 9 is stopped, the AC / DC power supply circuit 1 transmits a signal notifying the battery backup power supply 3 that the commercial AC power supply 9 has been stopped (step 30).

  The battery backup power supply 3 receives a signal from the AC / DC power supply circuit 1 and starts outputting DC power 13 to the load 2 (step 40), and continues the operation of the system.

  The AC / DC power supply circuit 1 stops supplying power when the commercial AC power supply 9 is stopped (step 50).

  When the commercial AC power supply 9 recovers, the AC / DC power supply circuit 1 transmits a signal notifying that the commercial AC power supply 9 has recovered to the battery backup power supply 3 (step 60).

  The AC / DC power supply circuit 1 starts to supply the DC power 12 to the load 2 again by the recovery of the commercial AC power supply 9 (step 70).

  The battery backup power source 3 is stopped (step 80).

  After the battery backup power source 3 stops, the operation returns to normal operation (to step 20).

  In the operation of the power supply control device of the comparative example, the operation confirmation of the discharge circuit 4 of the battery backup power supply 3 can be performed only when the discharge circuit 4 during the battery backup is operating. Therefore, if the discharge circuit 4 in the battery backup power supply 3 is out of order when the battery backup power supply 3 starts to supply power in Step 40 of FIG. 3, the battery backup power supply 3 applies DC power to the load 2. Can not be supplied.

  That is, in the power supply control device of the comparative example, the system goes down due to the failure of the discharge circuit 4.

  As described above, according to the power supply control apparatus of the embodiment of the present invention, even when the AC / DC power supply circuit cannot be supplied due to the stoppage of the commercial AC power supply, the power supply from the battery backup power supply is possible. System operation can be continued by supply. In addition, when the discharge circuit is out of order, the battery backup power supply can be replaced while the power supply from the commercial AC power supply to the load is continued. Therefore, it is possible to prevent the system from being down due to a failure of the discharge circuit, leading to an improvement in reliability.

DESCRIPTION OF SYMBOLS 1 AC / DC power supply circuit 2 Load 3 Battery backup power supply 4 Discharge circuit 5 Battery 6 Charging circuit 7 Control circuit 8 Control signal line 9 Commercial AC power supply 10 Power supply control device 11 AC power 12, 13, 14 DC power 16 Charging power 17 Discharge Power 100 Information system

Claims (8)

A power supply circuit for supplying DC power to the information system;
Auxiliary power,
A discharge circuit for discharging the auxiliary power source and supplying DC power to the information system;
A control circuit for controlling the discharge circuit,
The power supply control device, wherein the control circuit performs an operation check of the discharge circuit when the information system is activated.   The power supply control device according to claim 1, wherein the control circuit measures a voltage value of DC power output from the discharge circuit when the information system is activated.   The power supply control apparatus according to claim 1, wherein the control circuit measures a current value of DC power output from the discharge circuit when the system is started.   4. The power supply according to claim 1, wherein when the information circuit determines that the discharge circuit is normal when the information system is started up, the control circuit instructs the start-up of the power supply circuit. 5. Control device.   5. The power supply control device according to claim 1, wherein when the control circuit determines that the discharge circuit has a problem, the control circuit outputs information indicating the problem. 6.   The power supply control device according to claim 1, wherein the power supply circuit converts alternating current power into direct current power.   An information processing system including the power supply control device according to any one of claims 1 to 6. In a power supply control method in a power supply control device, including a power supply circuit for supplying DC power to an information system, an auxiliary power supply, and a discharge circuit for discharging the auxiliary power supply and supplying DC power to the information system,
A power supply control method, wherein a control circuit controls the discharge circuit, and confirms the operation of the discharge circuit when the information system is activated.

Images