JP2009240078A - Power supply controller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power supply controller capable of easily managing the remaining amount of energy of a power supply, and capable of improving the energy efficiency. <P>SOLUTION: The power supply controller which properly selects the voltages of a plurality of power supplies and supplies the voltage selected to a load is provided with: two power supplies; two supplies; two voltage-measuring means for measuring voltages of the two power supplies, respectively; a selection switch means for selecting one of the voltages of the two power supplies; and a control means, to which the output of the two voltage measuring means is applied, and by which the selection switch means is controlled to select the power supply having a lower voltage out of the two power supplies, to supply its voltage to the load, and to use the remaining amount of energy of the selected power supply, until it decreases to 0%. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a power supply control device that appropriately selects voltages of a plurality of power supplies and supplies them to a load, and more particularly to a power supply control device that can easily manage the remaining amount of energy of a power supply and improve energy efficiency.

  Prior art documents related to a power supply control device that appropriately selects voltages of a plurality of power supplies and supplies them to a load include the following.

JP 63-114332 A Japanese Patent Laid-Open No. 04-123118 JP-T 09-114529 JP 2002-215273 A

  FIG. 3 is a configuration block diagram showing an example of a conventional power supply control device that appropriately selects voltages of a plurality of power supplies and supplies them to a load.

  In FIG. 3, 1 is a secondary battery for main power supply, 2 is a backup secondary battery or a backup power supply which is a stabilized power supply, 3 and 4 are supply switch means for controlling the supply of voltage from each power supply, 5 And 6 are selection switch means for selecting one of the power supplies, 7 is a load, 8 and 9 are voltage measuring means for measuring the voltage of each power supply, 10 is a control means for controlling the whole power supply control device, and 11 is It is a display means for displaying an alarm or the like. 3, 4, 5, 6, 8, 9, 10 and 11 constitute a power supply control device.

  The output of the secondary battery 1 is applied to the input terminal of the supply switch means 3, and the output of the backup power source 2 is applied to the input terminal of the supply switch means 4.

  The output terminal of the supply switch means 3 is connected to the input terminal of the selection switch means 5 and the input terminal of the voltage measurement means 8, respectively. The output terminal of the supply switch means 4 is connected to the input terminal of the selection switch means 6 and the voltage measurement. Each is connected to an input terminal of means 9.

  The output terminals of the selection switch means 5 and 6 are respectively connected to one end of the load 7, and the other end of the load 7 is grounded.

  The outputs of the voltage measuring means 8 and 9 are respectively connected to the control means 10, and the display signal from the control means 10 is connected to the display means 11.

  Finally, a common control signal from the control means 10 to the two supply switch means is applied to the control input terminals of the supply switch means 3 and 4, respectively, and an individual control signal from the control means 10 to the selection switch means is Applied to the control input terminals of the selection switch means 5 and 6 individually.

  Here, the operation of the conventional example shown in FIG. 3 will be described with reference to FIG. FIG. 4 is a flowchart for explaining the operation of the control means 10.

  In “S001” in FIG. 4, the control means 10 turns on the supply switch means 3 and 4 according to the control signal to supply the voltage from the secondary battery 1 and the backup power source 2 to the voltage control device, and also measures the voltage measurement means 8. And 9, the output voltage values of the secondary battery 1 and the backup power source 2 are measured, and the respective voltage values are monitored.

  In “S002” in FIG. 4, the control means 10 turns the selection switch means 5 “ON” and the selection switch means 6 “OFF” by the control signal, and selects the secondary battery 1 as the main power source. The voltage supplied from the secondary battery 1 is supplied to the load 7.

  In “S003” in FIG. 4, the control means 10 determines that the remaining amount of energy of the secondary battery 1 that can be used by the load 7 is “0%” (hereinafter simply referred to as energy) based on the voltage value measured by the voltage measurement means 8. It is determined whether or not the remaining amount is “0%”), and waits until the remaining energy of the secondary battery 1 becomes “0%”.

  When it is determined that the remaining energy of the secondary battery 1 has become “0%” in “S003” in FIG. 4, the control means 10 turns “OFF” the selection switch means 5 in accordance with the control signal in “S004” in FIG. At the same time, the selection switch means 6 is turned “ON” to select the backup power supply 2 for backup, and the voltage supplied from the backup power supply 2 is supplied to the load 7.

  Then, in “S005” in FIG. 4, the control means 10 causes the display means 11 to display an alarm indicating that the remaining energy of the secondary battery 1 as the main power source has become “0%”. In S006 ", the control means 10 monitors the voltage value of the voltage measuring means 8 and waits until the secondary battery 1 as the main power source is replaced with a secondary battery with remaining energy" 100% ".

  When it is determined that the secondary battery 1 has been replaced in “S006” in FIG. 4, the control means 10 cancels the alarm of the display means 11 in “S007” in FIG. 4 and also displays “S002” in FIG. Return to step.

  As a result, when the voltage from the secondary battery as the main power supply is preferentially supplied to the load, and the remaining energy of the secondary battery that can be used in the load becomes “0%”, the secondary battery is By supplying the voltage from the backup power supply to the load until the replacement, it becomes possible to select the voltages of a plurality of power supplies as appropriate and supply them to the load.

  FIG. 5 is a configuration block diagram showing another example of a conventional power supply control apparatus that appropriately selects voltages of a plurality of power supplies and supplies them to a load.

  In FIG. 5, 12 and 13 are first and second secondary batteries, 14 and 15 are supply switch means for controlling the supply of voltage from each power source, and 16 and 17 are for selecting one of the power sources. A selection switch means, 18 is a load, 19 and 20 are voltage measuring means for measuring the voltage of each power supply, 21 is a control means for controlling the whole power supply control device, and 22 is a display means for displaying an alarm or the like. Reference numerals 14, 15, 16, 17, 19, 20, 21, and 22 constitute a power supply control device.

  The output of the first secondary battery 12 is applied to the input terminal of the supply switch means 14, and the output of the second secondary battery 13 is applied to the input terminal of the supply switch means 15.

  The output terminal of the supply switch means 14 is connected to the input terminal of the selection switch means 16 and the input terminal of the voltage measurement means 19, respectively. The output terminal of the supply switch means 15 is connected to the input terminal of the selection switch means 17 and the voltage measurement. Each is connected to an input terminal of means 20.

  The output terminals of the selection switch means 16 and 17 are each connected to one end of the load 18, and the other end of the load 18 is grounded.

  The outputs of the voltage measuring means 19 and 20 are respectively connected to the control means 21, and the display signal from the control means 21 is connected to the display means 22.

  Finally, a common control signal from the control means 21 to the two supply switch means is applied to the control input terminals of the supply switch means 14 and 15, respectively, and an individual control signal from the control means 21 to the selection switch means is Applied to the control input terminals of the selection switch means 16 and 17 individually.

  Here, the operation of the conventional example shown in FIG. 5 will be described with reference to FIG. FIG. 6 is a flowchart for explaining the operation of the control means 21.

  In “S101” in FIG. 6, the control means 21 turns on the supply switch means 14 and 15 by the control signal to supply the voltage from the two secondary batteries 12 and 13 to the voltage control device, and also measures the voltage measurement means 19. And 20, the output voltage values of the two secondary batteries 12 and 13 are measured, and the respective voltage values are monitored.

  In “S102” in FIG. 6, the control means 21 compares the measured voltage values to determine whether the voltage value of one secondary battery is higher than the voltage value of the other secondary battery (specifically, Determines whether the voltage value of the first secondary battery 12 is higher than the voltage value of the second secondary battery 13).

  If it is determined that the voltage value of one secondary battery (specifically, the first secondary battery 12) is higher in “S102” in FIG. 6, control is performed in “S103” in FIG. The means 21 turns the selection switch means 16 “ON” and the selection switch means 17 “OFF” by the control signal, and turns one secondary battery (specifically, the first secondary battery 12). Then, the voltage supplied from one of the secondary batteries is supplied to the load 18, and the process proceeds to the step "S105" in FIG.

  If it is determined that the voltage value of the other secondary battery (specifically, the second secondary battery 13) is higher in “S102” in FIG. 6, control is performed in “S104” in FIG. The means 21 turns the selection switch means 16 “OFF” and the selection switch means 17 “ON” by the control signal, and turns on the other secondary battery (specifically, the second secondary battery 13). Then, the voltage supplied from the other secondary battery is supplied to the load 18, and the process proceeds to the step "S105" in FIG.

  In “S105” in FIG. 6, the control means 21 is the minimum required for the two secondary batteries to secure the time for replacement work of the secondary batteries based on the voltage values measured by the voltage measuring means 19 and 20. It is determined whether or not the predetermined energy level has been reached. If the predetermined energy level has not been reached, the process returns to step S102 in FIG.

  Therefore, in the conventional example shown in FIG. 5, the steps “S102” to “S105” in FIG. 6 are repeated until the two secondary batteries reach a predetermined remaining energy level. A voltage is always supplied to the load from the secondary battery having a high voltage value among the batteries 12 and 13. In other words, the two secondary batteries 12 and 13 consume power almost simultaneously.

  When it is determined in “S105” in FIG. 6 that the two secondary batteries have reached a predetermined remaining energy level that is the minimum required to secure the time for replacement of the secondary batteries, “S106” in FIG. The control means 21 has reached a predetermined remaining energy level that is the minimum required for the two secondary batteries to secure the time for replacement of the secondary batteries (in other words, the time for replacement of the secondary batteries has been reached). ) Is displayed on the display means 22.

  Then, in “S107” in FIG. 6, the control means 21 monitors the voltage values of the voltage measuring means 19 and 20, and replaces the two secondary batteries 12 and 13 with secondary batteries whose remaining energy is “100%”, respectively. Wait until

  When it is determined that both the two secondary batteries 12 and 13 have been replaced in “S107” in FIG. 6, the control means 21 cancels the alarm of the display means 22 in “S108” in FIG. 6. Return to the step “S102”.

  As a result, the voltage is always supplied from the secondary battery having a high voltage value to the load among the two secondary batteries, so that the voltages of a plurality of power supplies can be appropriately selected and supplied to the load.

  However, in the conventional example shown in FIG. 3, the backup power source 2 always maintains a remaining energy level capable of supplying a sufficient voltage to the load 7 during the replacement work of the secondary battery 1 as the main power source. Due to the necessity, there was a problem that the management of the remaining energy of the backup power source was complicated.

Further, in the conventional example shown in FIG. 5, the two secondary batteries are replaced when the two secondary batteries reach a predetermined remaining energy level that is the minimum necessary to secure the time for replacement of the secondary batteries. Therefore, when the removed secondary battery is charged, it is necessary to discharge the “predetermined remaining energy” in order to prevent the memory effect from occurring. There was a problem that energy efficiency was deteriorated due to energy loss caused by discharge.
Therefore, the problem to be solved by the present invention is to realize a power supply control device that can easily manage the remaining amount of energy of the power supply and can improve the energy efficiency.

In order to achieve such a problem, the invention according to claim 1 of the present invention is:
In a power supply control device that appropriately selects voltages of a plurality of power supplies and supplies them to a load,
Two power supplies, two voltage measuring means for measuring the voltages of the two power supplies, selection switch means for selecting one of the voltages of the two power supplies, and outputs of the two voltage measuring means are applied. And a control means for controlling the selection switch means to select a power supply having a lower voltage from the two power supplies, supplying a voltage to the load, and using the selected power supply until the remaining power of the selected power supply becomes 0%; This makes it easy to manage the remaining amount of energy in consideration of the time required for replacement work, and uses up the secondary battery energy, eliminating the need for discharge time and improving energy efficiency because there is no energy loss due to discharge. It becomes possible to make it.

The invention according to claim 2
In the power supply control device according to claim 1,
The control means is
When the remaining amount of energy of the selected power supply becomes 0%, the selection switch means is controlled to select the power supply that was desired to be selected first to supply voltage to the load and to display an alarm on the display means This makes it easy to manage the remaining amount of energy in consideration of the time required for replacement work, and uses up the energy of the secondary battery, eliminating the need for discharge time and improving energy efficiency because there is no energy loss due to discharge. Is possible.

The invention described in claim 3
In the power supply control device according to claim 2,
The control means is
When the power supply with 0% remaining energy is replaced, the alarm of the display means is canceled and the power supply with the lower voltage selected from the two power supplies is supplied to supply the load. It is easy to manage the remaining amount of energy in consideration of the work time, and since the secondary battery energy is used up, the discharge time becomes unnecessary, and there is no energy loss due to discharge, so that energy efficiency can be improved.

The invention according to claim 4
In the power supply control device according to claim 1,
The power source is
Because it is a primary battery, secondary battery, or fuel cell, it is easy to manage the remaining amount of energy in consideration of the time required for replacement work. Since there is no energy loss due to, energy efficiency can be improved.

The invention according to claim 5
In the power supply control device according to claim 1,
By using a voltage comparator instead of the voltage measuring means, it is easy to manage the remaining amount of energy in consideration of the time for replacement work. Since there is no energy loss due to, energy efficiency can be improved.

The invention described in claim 6
In the power supply control device according to claim 1,
The control means is
Consider the replacement work time by selecting the power supply based on the measurement results of the specific gravity of the electrolyte of the two power supplies and supplying the voltage to the load until the selected power supply has 0% remaining energy. Therefore, it is easy to manage the remaining amount of energy, and since the energy of the secondary battery is used up, the discharge time becomes unnecessary, and there is no energy loss due to discharge, so that energy efficiency can be improved.

The present invention has the following effects.
According to the first, second, third, fourth, and fifth aspects of the present invention, the energy of one of the two secondary batteries having the lower voltage is used up, and then the other secondary battery. By replacing the secondary battery with one voltage supplied to the load, it is easy to manage the remaining energy in consideration of the replacement time, and the discharge time is not required because the secondary battery energy is used up. Thus, energy efficiency can be improved because there is no energy loss due to discharge.

  Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing the configuration of an embodiment of a power supply control apparatus according to the present invention.

  In FIG. 1, reference numerals 23 and 24 denote first and second secondary batteries as power sources, reference numerals 25 and 26 denote supply switch means for controlling supply of voltage from each power source, and reference numerals 27 and 28 select one of the power supplies. Selection switch means, 29 is a load, 30 and 31 are voltage measuring means for measuring the voltage of each power supply, 32 is a control means for controlling the whole power supply control device, and 33 is a display means for displaying an alarm or the like. Reference numerals 25, 26, 27, 28, 30, 31, 32 and 33 constitute a power supply control device.

  The output of the first secondary battery 23 is applied to the input terminal of the supply switch means 25, and the output of the second secondary battery 24 is applied to the input terminal of the supply switch means 26.

  The output terminal of the supply switch means 25 is connected to the input terminal of the selection switch means 27 and the input terminal of the voltage measurement means 30, respectively. The output terminal of the supply switch means 26 is connected to the input terminal of the selection switch means 28 and the voltage measurement. Each is connected to an input terminal of means 31.

  The output terminals of the selection switch means 27 and 28 are each connected to one end of a load 29, and the other end of the load 29 is grounded.

  The outputs of the voltage measuring means 30 and 31 are respectively connected to the control means 32, and the display signal from the control means 32 is connected to the display means 33.

  Finally, a common control signal from the control means 32 to the two supply switch means is applied to the control input terminals of the supply switch means 25 and 26, respectively, and an individual control signal from the control means 32 to the selection switch means is Applied to the control input terminals of the selection switch means 27 and 28 individually.

  Here, the operation of the embodiment shown in FIG. 1 will be described with reference to FIG. FIG. 2 is a flowchart for explaining the operation of the control means 32.

  In “S301” in FIG. 2, the control means 32 turns on the supply switch means 25 and 26 by the control signal to supply the voltage from the two secondary batteries 23 and 24 to the voltage control device, and the voltage measurement means 30. And 31 measure the output voltage values of the two secondary batteries 23 and 24, and monitor the respective voltage values.

  In “S302” in FIG. 2, the control means 32 compares the measured voltage values to determine whether or not the voltage value of one secondary battery is lower than the voltage value of the other secondary battery (specifically, Determines whether the voltage value of the first secondary battery 23 is lower than the voltage value of the second secondary battery 24).

  If it is determined that the voltage value of one of the secondary batteries (specifically, the first secondary battery 23) is lower in “S302” in FIG. 2, the control is performed in “S303” in FIG. The means 32 turns the selection switch means 27 “ON” and the selection switch means 28 “OFF” by a control signal, and turns one secondary battery (specifically, the first secondary battery 23). The voltage supplied from one of the secondary batteries is selected and supplied to the load 29.

  Then, in “S304” in FIG. 2, the control means 32 determines that the remaining energy of one of the secondary batteries (specifically, the first secondary battery 23) that can be used by the load 29 is “0%” (hereinafter referred to as “second”). Simply wait until the remaining energy is called “0%”).

  For this reason, in the embodiment shown in FIG. 1, one secondary battery is used until the remaining energy of one secondary battery reaches “0%”, in other words, until one secondary battery is used up. Will continue.

  If the remaining energy of one secondary battery (specifically, the first secondary battery 23) becomes “0%” in “S304” in FIG. 2, “S305” in FIG. The control means 32 turns the selection switch means 27 “OFF” and the selection switch means 28 “ON” according to the control signal, and the other secondary battery (specifically, the second secondary battery 24). And the voltage supplied from the other secondary battery is supplied to the load 29.

  Then, “S306” control means 32 in FIG. 2 indicates that the remaining energy of one secondary battery (specifically, the first secondary battery 23) has become “0%” (in other words, one of the secondary batteries 23). The display means 33 displays an alarm indicating that the secondary battery has been used up.

  Then, in “S307” in FIG. 2, the control means 32 monitors the voltage value of the voltage measuring means 30 and waits until one of the secondary batteries 23 is replaced with a secondary battery having a remaining energy of “100%”. .

  When it is determined that one of the secondary batteries 23 has been replaced in “S307” in FIG. 2, the control means 32 cancels the alarm of the display means 33 in “S308” in FIG. Return to the step.

  On the other hand, if it is determined that the voltage value of one secondary battery (specifically, the first secondary battery 23) is higher in “S302” in FIG. 2, “S309” in FIG. The control means 32 turns the selection switch means 27 “OFF” and the selection switch means 28 “ON” according to the control signal, and the other secondary battery (specifically, the second secondary battery 24). And the voltage supplied from the other secondary battery is supplied to the load 29.

  Then, in “S310” in FIG. 2, the control means 32 determines that the remaining energy of the other secondary battery (specifically, the second secondary battery 24) that can be used by the load 29 is “0%” (hereinafter referred to as “second”). Simply wait until the remaining energy is called “0%”).

  For this reason, in the embodiment shown in FIG. 1, the other secondary battery is used until the remaining energy level of the other secondary battery reaches “0%”, in other words, until the other secondary battery is used up. Will continue.

  If the remaining energy of the other secondary battery (specifically, the second secondary battery 24) becomes “0%” in “S310” in FIG. 2, “S311” in FIG. In the control means 32, the selection switch means 27 is turned "ON" and the selection switch means 28 is turned "OFF" by the control signal, and one of the secondary batteries (specifically, the first secondary battery 23) is turned on. ) Is selected, and the voltage supplied from one of the secondary batteries is supplied to the load 29.

  Then, “S312” control means 32 in FIG. 2 indicates that the remaining energy of the other secondary battery (specifically, the second secondary battery 24) has become “0%” (in other words, the other secondary battery 24). The display means 33 displays an alarm indicating that the secondary battery has been used up.

  Then, in “S313” in FIG. 2, the control means 32 monitors the voltage value of the voltage measurement means 31 and waits until the other secondary battery 24 is replaced with a secondary battery having the remaining energy “100%”. .

  When it is determined that the other secondary battery 24 has been replaced in “S313” in FIG. 2, the control means 32 releases the alarm of the display means 33 in “S314” in FIG. Return to the step.

  As a result, by using up the energy of one of the two secondary batteries having the lower voltage, supplying the voltage of the other secondary battery to the load, and replacing the one secondary battery. It is easy to manage the remaining amount of energy in consideration of the time of replacement work, and since the secondary battery energy is used up, the discharge time becomes unnecessary, and there is no energy loss due to discharge, so energy efficiency can be improved. Become.

  In addition, since the replacement work of the secondary battery is either one, the work efficiency is improved, and when the remaining energy of one secondary battery becomes “0%”, the energy of the other secondary battery is Since the remaining amount is sufficient, there is a margin in the replacement work time.

  In the embodiment shown in FIG. 1, a power supply control device using two secondary batteries as power sources is illustrated, but the power source may be a primary battery or a fuel cell instead of a secondary battery. Further, the number of secondary batteries or the like as the power source is not limited as long as it is two or more.

  Further, in the embodiment shown in FIG. 1, the voltage of each secondary battery is measured and monitored using voltage measuring means, but a preset threshold value is obtained using a voltage comparator (comparator) instead of the voltage measuring means. The control means may control “ON / OFF” of the selection switch means on the basis of the binarized signal depending on whether or not the value exceeds.

  Further, in the embodiment shown in FIG. 1, the voltage of each secondary battery is measured and monitored using a voltage measuring means, but a physical quantity other than the voltage (for example, specific gravity of the electrolytic solution) is measured, and based on the measurement result. The control means may control “ON / OFF” of the selection switch means.

  In addition, in the embodiment shown in FIG. 1, two supply switch means for controlling the supply of the voltage of each secondary battery are provided, but since both are in an "ON" state during operation, the supply switch means It is not an essential component.

  Further, in the embodiment shown in FIG. 1, two selection switch means are provided for the sake of simplicity of description. Of course, one selection switch means may be used if it has a function of selecting one of the voltages of the two power supplies. It does not matter.

1 is a block diagram illustrating a configuration of an embodiment of a power supply control device according to the present invention. It is a flowchart explaining operation | movement of a control means. It is a block diagram which shows an example of the conventional power supply control apparatus. It is a flowchart explaining operation | movement of a control means. It is a block diagram showing another example of a conventional power supply control device. It is a flowchart explaining operation | movement of a control means.

Explanation of symbols

1, 12, 13, 23, 24 Secondary battery 2 Backup power source 3, 4, 14, 15, 25, 26 Supply switch means 5, 6, 16, 17, 27, 28 Select switch means 7, 18, 29 Load 8 9, 19, 20, 30, 31 Voltage measuring means 10, 21, 32 Control means 11, 22, 33 Display means

Claims (6)

In a power supply control device that appropriately selects voltages of a plurality of power supplies and supplies them to a load,
Two power supplies,
Two voltage measuring means for measuring the voltages of the two power sources,
Selection switch means for selecting one of the voltages of the two power supplies;
Outputs of the two voltage measuring means are applied, and the selection switch means is controlled to select a power source having a lower voltage from the two power sources to supply a voltage to the load. And a control means for use until the amount reaches 0%. The control means is
When the remaining amount of energy of the selected power source becomes 0%, the selection switch means is controlled to select the power source that was desired to be selected first, to supply voltage to the load, and to alarm the display means The power supply control device according to claim 1, wherein the power supply control device is displayed. The control means is
When the power source whose remaining energy is 0% is replaced, the alarm of the display means is canceled and the lower power source of the two power sources is selected to supply the voltage to the load. The power supply control device according to claim 2. The power source is
The power supply control device according to claim 1, wherein the power supply control device is a primary battery, a secondary battery, or a fuel cell. 2. The power supply control device according to claim 1, wherein a voltage comparator is used instead of the voltage measuring means. The control means is
The power supply is selected based on the measurement result of the specific gravity of the electrolytes of the two power supplies, a voltage is supplied to the load, and the selected power supply is used until the remaining amount of energy becomes 0%. Power supply control device.

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