[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

WO2014181631A1 - Power source device and power supply method - Google Patents

Power source device and power supply method Download PDF

Info

Publication number
WO2014181631A1
WO2014181631A1 PCT/JP2014/060373 JP2014060373W WO2014181631A1 WO 2014181631 A1 WO2014181631 A1 WO 2014181631A1 JP 2014060373 W JP2014060373 W JP 2014060373W WO 2014181631 A1 WO2014181631 A1 WO 2014181631A1
Authority
WO
WIPO (PCT)
Prior art keywords
voltage
secondary battery
capacitor
power supply
supply device
Prior art date
Application number
PCT/JP2014/060373
Other languages
French (fr)
Japanese (ja)
Inventor
克也 小野瀬
高治 松永
梶谷　浩司
Original Assignee
日本電気株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本電気株式会社 filed Critical 日本電気株式会社
Priority to JP2015515825A priority Critical patent/JPWO2014181631A1/en
Publication of WO2014181631A1 publication Critical patent/WO2014181631A1/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/345—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering using capacitors as storage or buffering devices

Definitions

  • the present invention relates to a power supply device having a secondary battery and a capacitor and a power supply method.
  • the usable time of the secondary battery can be extended by connecting the secondary battery and the electric double layer capacitor or the hybrid capacitor using lithium ions as a negative electrode in parallel. Can be output instantaneously by the capacitor.
  • the power supply device described in Patent Document 2 includes a DC / DC (direct current / direct current) converter that converts electric power from a secondary battery, and a DC / DC converter that converts electric power from a capacitor.
  • the operation of each DC / DC converter is controlled so that power is preferentially supplied from the capacitor when large current consumption is required.
  • the secondary battery, the capacitor, and the output are controlled by controlling the operations of a plurality of DC / DC converters connected to the secondary battery and the capacitor.
  • a conversion loss occurs when the DC / DC converter converts the electric power from the secondary battery, and the burden on the secondary battery increases by this conversion loss.
  • An object of the present invention is to provide a power supply device and a power supply method capable of solving the above-described problems.
  • the power supply device of the present invention is A secondary battery, A capacitor; A voltage generation unit that generates a predetermined voltage that is equal to or lower than the voltage of the secondary battery using the voltage of the capacitor, and an output terminal connected to a load; A specific switch connected between the secondary battery and the load; Control means for intermittently turning on and off the specific switch.
  • the power supply method of the present invention includes: A secondary battery; a capacitor; a voltage generating means for generating a predetermined voltage equal to or lower than the voltage of the secondary battery using the voltage of the capacitor; and an output terminal connected to a load; the secondary battery and the load
  • a power supply method including a specific switch connected between and a power supply device, The specific switch is turned on and off intermittently.
  • the power of the capacitor can be used at any timing to reduce the burden on the secondary battery, and the loss of the secondary battery due to power conversion can be reduced.
  • FIG. 3 is a flowchart for explaining the operation of the power supply apparatus 100. It is a figure for demonstrating the operation timing of the PWM control in 1st Embodiment. It is the block diagram which showed power supply device 100A of 2nd Embodiment. It is a figure for demonstrating the operation timing of the PWM control in 2nd Embodiment. It is a figure for demonstrating the operation timing of the PWM control in 3rd Embodiment.
  • FIG. 1 is a diagram showing a power supply device 100 according to the first embodiment of the present invention.
  • a power supply device 100 includes a secondary battery 1, a switch 2, a PCS (Power Control System) 3, a diode 4, a capacitor 5, a switch 6, a DC / DC converter 7, and a diode 8. , Switch 9, current limiting resistor 10, diode 11, control circuit 12, voltage sensors 13 and 14, and snapper circuit 15.
  • PCS Power Control System
  • the secondary battery 1 is, for example, a lithium ion secondary battery. Note that the secondary battery 1 is not limited to a lithium secondary battery, and may be another secondary battery.
  • the secondary battery 1 is connected to the PCS 3 through a switch 2 and a diode 4 for suppressing and interrupting discharge.
  • the switch 2 is an example of a specific switch, for example, a semiconductor switch element.
  • a snubber circuit 15 is connected to the switch 2 in parallel to reduce the inrush current to the switch 2.
  • PCS3 is an example of a load.
  • the PCS 3 converts DC power into AC power.
  • the PCS 3 is a drive that requires a current having a current value I1 (hereinafter referred to as “steady driving”) and a drive that requires a current having a current value I2 (hereinafter “large”). (Referred to as “current driving”).
  • the PCS 3 When performing a large current drive, the PCS 3 outputs a control signal (for example, a control signal for requesting a current having a current value I2).
  • the diode 4 is arranged in such a direction as to interrupt the current flowing from the PCS 3 to the secondary battery 1.
  • the capacitor 5 is, for example, a lithium ion capacitor.
  • the capacitor 5 is not limited to a lithium ion capacitor, and may be another type of capacitor or a large-capacity capacitor as long as charging and discharging can be performed more rapidly than the secondary battery 1.
  • the capacitor 5 a capacitor whose upper limit value of the rated voltage is not less than the upper limit value of the rated voltage of the secondary battery 1 and whose lower limit value of the rated voltage is not more than the lower limit value of the rated voltage of the secondary battery 1 is used. Used.
  • the capacitor 5 is connected to an input section (input terminal) 7a of a constant voltage output type DC / DC converter 7 through a switch 6 for interrupting discharge.
  • the switch 6 is an example of a predetermined switch.
  • the DC / DC converter 7 is an example of a voltage generation unit, and an output unit (output terminal) 7b of the DC / DC converter 7 is connected to the PCS 3 via a diode 8.
  • the diode 8 is arranged in such a direction as to interrupt the current flowing from the PCS 3 to the DC / DC converter 7.
  • the secondary battery 1 is connected to the capacitor 5 through the diode 11, the switch 9 and the current limiting resistor 10.
  • a path formed by the diode 11, the switch 9, and the current limiting resistor 10 functions as a charging path through which current flows from the secondary battery 1 to the capacitor 5.
  • the switch 9 is an example of a charging switch.
  • the diode 11 is arranged in such a direction as to interrupt the current flowing from the capacitor 5 to the secondary battery 1.
  • the voltage sensor 13 is an example of a first detection unit and detects the voltage of the secondary battery 1.
  • the voltage sensor 14 is an example of a second detection unit and detects the voltage of the capacitor 5.
  • the control circuit 12 is an example of a control means.
  • the control circuit 12 turns on / off the switch 2 intermittently.
  • the control circuit 12 includes a detection result of the voltage sensor 13 (voltage of the secondary battery 13), a detection result of the voltage sensor 14 (voltage of the capacitor 5), and a control signal (for example, current value) from the PCS 3.
  • the control signal for requesting the current I2) is controlled based on the PWM (Pulse Width Modulation) control of the switch 2 and the simple on / off of the switch 6 and the switch 9.
  • the control circuit 12 determines that the voltage of the secondary battery 1 is greater than or equal to a predetermined value A based on the detection result of the voltage sensor 13. Check whether or not.
  • the predetermined value A is a value not less than the lower limit value and not more than the upper limit value of the usable voltage range (rated voltage) of the secondary battery 1, and is an example of a first threshold value.
  • the predetermined value A is a value that is closer to the lower limit than the upper limit of the usable voltage range of the secondary battery 1 and is a value that does not cause an internal short circuit of the secondary battery 1 due to a voltage drop.
  • the control circuit 12 performs the following operation.
  • the control circuit 12 turns on the switch 2 and discharges the power of the secondary battery 1 to the PCS 3. Further, the control circuit 12 turns on the switch 9 to enable charging of the capacitor 5 from the secondary battery 1.
  • the current flowing from the secondary battery 1 to the capacitor 5 is limited according to the resistance value of the current limiting resistor 10.
  • control circuit 12 performs the following operation.
  • the control circuit 12 turns off the switch 2 and the switch 9 and stops discharging from the secondary battery 1 to the PCS 3 and the capacitor 5.
  • the secondary battery 1 is charged by charging means (not shown).
  • the control circuit 12 does not return the discharge path until the voltage of the secondary battery 1 becomes higher than the predetermined value A. The reason is to prevent ringing around the predetermined value A.
  • the control circuit 12 performs the return of the discharge path by turning on the switch 2 and the switch 9.
  • control circuit 12 checks whether the voltage of the capacitor 5 is equal to or higher than the predetermined value B based on the detection result of the voltage sensor 14.
  • the predetermined value B is a value not less than the lower limit value and not more than the upper limit value of the usable voltage range (rated voltage) of the capacitor 5, and is an example of a second threshold value.
  • the predetermined value B is a value closer to the lower limit than the upper limit of the usable voltage range of the capacitor 5 and is a value that does not cause an internal short circuit of the capacitor 5 due to a voltage drop.
  • the control circuit 12 performs the following operation.
  • the control circuit 12 turns on the switch 6 and supplies a voltage from the capacitor 5 to the DC / DC converter 7.
  • the DC / DC converter 7 converts the voltage of the capacitor 5 into a voltage having a voltage value of a predetermined value A, and outputs a voltage of the predetermined value A.
  • the output of the DC / DC converter 7 merges with the output of the secondary battery 1 output from the diode 4 via the diode 8.
  • the voltage at the time of discharging of the secondary battery 1 is equal to or higher than a predetermined value A that is an output voltage of the DC / DC converter 7, and the secondary battery 1 is less than the predetermined value A because the voltage of the secondary battery 1 decreases. Discharge is stopped when reaching. Therefore, no current flows from the DC / DC converter 7 to the PCS 3 in a state where the secondary battery 1 is discharged in a steady state.
  • FIG. 2 is a flowchart for explaining the operation of the power supply apparatus 100.
  • step 101 the control circuit 12 reads the voltage of the secondary battery 1 from the voltage sensor 13, and then in step 102, checks whether the voltage is equal to or greater than a predetermined value A.
  • the control circuit 12 reads the voltage of the capacitor 5 from the voltage sensor 14 in step 103, and then the voltage value is greater than or equal to the predetermined value B in step 104. Check if it is.
  • the control circuit 12 determines in step 105 that the PWM control can be turned on, turns on the switch 2 and the switch 6, and turns on the secondary battery. 1 and capacitor 5 are prepared for discharge, and the routine proceeds to step 106.
  • the control circuit 12 When the voltage of the secondary battery 1 is less than the predetermined value A in step 102 or the voltage of the capacitor 5 is less than the predetermined value B in step 103, the control circuit 12 returns the process to step 101, and the secondary battery 1 Repeat the voltage reading.
  • step 106 when the control circuit 12 receives a control signal (a control signal for requesting the current having the current value I2) from the PCS 3, the process proceeds to step 107.
  • a control signal a control signal for requesting the current having the current value I2
  • step 106 when the control circuit 12 has not received a control signal, the control circuit 12 returns the process to step 101 and repeats the reading of the voltage of the secondary battery 1.
  • step 107 the control circuit 12 turns off the switch 9 regardless of the voltage of the secondary battery 1 to forcibly cut off the charging path from the secondary battery 1 to the capacitor 5, and the PWM control for the switch 2.
  • the switch 2 is turned on and off repeatedly.
  • the secondary battery 1 performs intermittent discharge, and current flows from the DC / DC converter 7 to the PCS 3 during the time when the discharge of the secondary battery 1 is intermittently interrupted.
  • the secondary battery 1 and the capacitor 5 share the power supply to the PCS 3.
  • step 107 the control circuit 12 immediately proceeds to step 108 to determine whether the voltage of the secondary battery 1 is equal to or higher than the predetermined value A.
  • the control circuit 12 advances the process to step 109 when the voltage of the secondary battery 1 is equal to or higher than the predetermined value A, and advances the process to step 111 when the voltage of the secondary battery 1 is less than the predetermined value A, and performs PWM control. Exit.
  • step 109 the control circuit 12 determines whether the voltage of the capacitor 5 is equal to or higher than a predetermined value B.
  • the control circuit 12 advances the process to step 110 when the voltage of the capacitor 5 is equal to or higher than the predetermined value B, and advances the process to step 111 when the voltage of the capacitor 5 is less than the predetermined value B, and ends the PWM control.
  • step 110 the control circuit 12 determines whether a control signal is received from the PCS 3.
  • the control circuit 12 returns the process to step 108 when the control signal is continuously received from the PCS 3, and advances the process to step 111 when the reception of the control signal from the PCS 3 is finished, and ends the PWM control.
  • step 111 when the voltage of the secondary battery 1 becomes equal to or higher than the predetermined value A, the control circuit 12 turns on the switch 9 again to restore the charging path from the secondary battery 1 to the capacitor 5.
  • the control circuit 12 turns off the switch 6 and stops the discharge from the capacitor 5 to the DC / DC converter 7.
  • the control circuit 12 does not return the discharge path from the capacitor 5 to the DC / DC converter 7 until the voltage of the capacitor 5 becomes higher than the predetermined value B by charging the capacitor 5 from the secondary battery 1. The reason is to prevent ringing in the vicinity of the predetermined value B.
  • the control circuit 12 executes the return of the discharge path by turning on the switch 9. At this time, since the upper limit value and the lower limit value of the rated voltage of the capacitor 5 are made wider than those of the secondary battery 1, the voltage of the capacitor 5 safely transitions within the usable voltage range.
  • FIG. 3 is a diagram for explaining the operation timing of the PWM control in the first embodiment.
  • a steady current flows to the PCS 3 from time t0 to time t1, and a large current period occurs at the timing of time t1.
  • the control circuit 12 receives a control signal from the PCS 3 at the timing of time t1, and starts PWM control.
  • the output of the secondary battery 1 whose voltage is equal to or higher than the predetermined value A and the voltage of the DC / DC converter 7 whose voltage is equal to the predetermined value A are alternately displayed. It is output to PCS3. For this reason, after time t1, the voltage output to the PCS 3 becomes a rectangular wave.
  • the present embodiment is configured as described above, and the output of the secondary battery 1 and the output of the capacitor that has been made constant voltage by the DC / DC converter 7 are combined and output using PWM control and a diode.
  • the secondary battery 1, the capacitor 5, and the output terminal 7 b are connected to the PCS 3, and DC is used to generate a predetermined voltage (predetermined value A) that is equal to or lower than the voltage of the secondary battery 1 using the power of the capacitor 5.
  • predetermined value A predetermined value that is equal to or lower than the voltage of the secondary battery 1 using the power of the capacitor 5.
  • the voltage of the secondary battery 1 is intermittently supplied to the PCS 3 while the supply of the voltage of the secondary battery 1 is intermittently stopped.
  • the output voltage of the DC / DC converter 7 that converts and outputs the voltage 5 can be supplied to the PCS 3.
  • the capacitor 5 having a voltage characteristic different from that of the secondary battery 1 can be used for reducing the discharge burden of the secondary battery 1 at an arbitrary timing for an arbitrary time.
  • the life of the secondary battery 1 can be extended.
  • the output of the secondary battery 1 is supplied to the PCS 3 without conversion, it is possible to reduce the loss of the secondary battery due to power conversion.
  • the power supply apparatus includes the DC / DC converter 7, the switch 2 connected between the secondary battery 1 and the PCS 3, and the control circuit 12 that turns the switch 2 on and off intermittently.
  • control circuit 12 intermittently turns on and off the switch 2 when the detection result of the voltage sensor 13 is equal to or greater than the predetermined value A and the detection result of the voltage sensor 14 is equal to or greater than the predetermined value B. For this reason, it becomes possible to discharge the secondary battery 1 and the capacitor 5 in a situation where the secondary battery 1 and the capacitor 5 can perform a preset discharge.
  • control circuit 12 turns on the switch 6 when the detection result of the voltage sensor 14 is equal to or greater than the predetermined value B. For this reason, it becomes possible to discharge the capacitor 5 in a situation where the capacitor 5 can perform a preset discharge.
  • the control circuit 12 intermittently turns on and off the switch 2 in response to a control signal from the PCS 3 (a control signal instructing the supply of power), and does not accept the control signal from the PCS 3.
  • a control signal from the PCS 3 a control signal instructing the supply of power
  • the switch 9 is turned on. For this reason, the capacitor 5 can be charged by the secondary battery 1 when the secondary battery 1 is not discharged to the PCS 3 in a state where the secondary battery 1 can be discharged.
  • FIG. 4 is a block diagram showing a power supply device 100A of the second embodiment.
  • the same components as those shown in FIG. 4 are identical to those shown in FIG. 4, the same components as those shown in FIG. 4, the same components as those shown in FIG. 4, the same components as those shown in FIG.
  • the current sensor 16 is arranged in the current path for supplying current to the PCS 3, and the control circuit 17 is provided instead of the control circuit 14, which is the power supply device of the first embodiment. This is the main difference from 100.
  • the control circuit 17 calculates the average value of the current flowing through the PCS 3 based on the current information detected by the current sensor 16, and triggers PWM control to start that the calculation result exceeds a predetermined value C. Is different from the control circuit 14.
  • control circuit 17 calculates an average value of current in a predetermined period (for example, a period of 1 second or more) based on the current information detected by the current sensor 16.
  • the predetermined period is not limited to a period of 1 second or longer and can be changed as appropriate.
  • FIG. 5 is a diagram for explaining the operation timing of the PWM control in the second embodiment.
  • a constant current to PCS3 flows from time t0 to time t1, and a large current period in which the current to PCS3 exceeds a predetermined value C occurs at the timing of time t1. .
  • the control circuit 17 starts PWM control.
  • the average of the discharge current to the PCS 3 after the time t1 is the one that was discharged only by the secondary battery 1 in the period from the time t0 to the time t2. From time t2 when the value exceeds the predetermined value C, the secondary battery 1 and the capacitor 5 are alternately discharged, and the burden on the secondary battery 1 is reduced.
  • the output (voltage) of the secondary battery 1 at which the voltage is equal to or higher than the predetermined value A and the voltage of the DC / DC converter 7 at which the voltage is at the predetermined value A are obtained.
  • the voltage output to the PCS 3 is a rectangular wave.
  • the present embodiment is configured as described above, and has the same effect as the first embodiment, and when a large current is drawn from the power supply device to the load, the PWM control is automatically performed, which is unexpected. It is possible to reduce the burden on the secondary battery during large current discharge, and it has an advantage of being resistant to current fluctuation.
  • the duty ratio of the PWM control is changed according to the average value of the current flowing through the PCS3.
  • the function of increasing the discharge rate of the capacitor 5 as the average value of the current flowing through the PCS 3 increases.
  • Other configurations are the same as those of the power supply apparatus 100A of the second embodiment shown in FIG.
  • FIG. 6 is a diagram for explaining the operation timing of PWM control in the third embodiment.
  • a steady current flows to the PCS 3 during the period from the time t0 to the time t1, and the current flowing to the PCS 3 exceeds the predetermined value D at the timing of the time t1. Further, at time t3, the current flowing to the PCS 3 exceeds the predetermined value E.
  • the state in which no current flows from the DC / DC converter 7 in a steady state is set to a duty ratio 0 of PWM control, and after the generation of a large current at time t1, the control circuit 17 At time t2, which is the timing when the average value of the discharge current to the PCS 3 calculated based on the current value of 16 exceeds the predetermined value D, PWM control is started and the duty ratio is raised from 0 to the predetermined value F.
  • control circuit 17 further increases the duty ratio from the predetermined value F to the predetermined value G at time t4, which is the timing when the average value of the discharge current exceeds the predetermined value E.
  • control circuit 17 reduces the discharge rate of the secondary battery 1 as the amount of current flowing through the PCS 3 increases.
  • the discharge contribution rate of the capacitor 5 is increased.
  • the present embodiment is configured as described above, and has the same effect as the second embodiment.
  • the load of the secondary battery 1 corresponding to the magnitude of the current value can be reduced, and the current required by the load is not determined and is discharged.
  • the present invention can be applied to a power supply system in which the rate varies greatly.
  • the PCS is used as the load.
  • the load is not limited to the PCS and can be changed as appropriate.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

A power source device includes: a secondary cell; a capacitor; a voltage-generating means for generating a prescribed voltage at or below the voltage of the secondary cell using power from the capacitor, the voltage-generating means having an output terminal connected to a load; a selection switch connected between the secondary cell and the load; and a control means that intermittently turns on or off the selection switch.

Description

電源装置および電力供給方法Power supply device and power supply method
　本発明は、二次電池とキャパシタとを有する電源装置および電力供給方法に関する。 The present invention relates to a power supply device having a secondary battery and a capacitor and a power supply method.
　高いエネルギー密度を有する二次電池と、この二次電池より急速な放電や大電力放電が可能なキャパシタとを、併用することによって、エネルギー密度と出力の両方に優れた特性を有する電源装置が、特許文献１、２に記載されている。 By using a secondary battery having a high energy density and a capacitor capable of rapid discharge and high power discharge more than this secondary battery, a power supply device having excellent characteristics in both energy density and output is obtained. It is described in Patent Documents 1 and 2.
　特許文献１に記載の電源装置では、二次電池と、電気二重層キャパシタまたはリチウムイオンを負極に用いたハイブリッドキャパシタとを、並列接続することによって、二次電池の使用可能時間を長くすることができ、かつキャパシタによる瞬発的な出力が可能となる。 In the power supply device described in Patent Document 1, the usable time of the secondary battery can be extended by connecting the secondary battery and the electric double layer capacitor or the hybrid capacitor using lithium ions as a negative electrode in parallel. Can be output instantaneously by the capacitor.
　特許文献２に記載の電源装置は、二次電池からの電力を変換するＤＣ／ＤＣ（直流／直流）コンバータと、キャパシタからの電力を変換するＤＣ／ＤＣコンバータと、を備える。特許文献２に記載の電源装置では、大電流の消費が必要なときには、キャパシタから優先的に電力が供給されるように、各ＤＣ／ＤＣコンバータの動作が制御される。 The power supply device described in Patent Document 2 includes a DC / DC (direct current / direct current) converter that converts electric power from a secondary battery, and a DC / DC converter that converts electric power from a capacitor. In the power supply device described in Patent Document 2, the operation of each DC / DC converter is controlled so that power is preferentially supplied from the capacitor when large current consumption is required.
特開２０１１－２５４６５０号公報JP 2011-254650 A 特開２０１０－２７３４２８号公報JP 2010-273428 A
　特許文献１に記載の電源装置のように、二次電池と、急速な放電や大電力放電が可能なキャパシタとを、単純な並列接続とした場合、急な大電流要求時などの瞬時的な電流変動に対応してキャパシタが大電流放電するものの、電圧降下の起こらない定常時には、大きな放電は行われない。 When a secondary battery and a capacitor capable of rapid discharge and high power discharge are simply connected in parallel as in the power supply device described in Patent Document 1, an instantaneous response such as when a sudden large current is required Although the capacitor discharges a large current in response to the current fluctuation, a large discharge is not performed in a steady state where no voltage drop occurs.
　このため、負荷への放電電流が所定値よりも高い状況が一定時間継続する場合には、時間の経過に伴い二次電池からの放電が支配的となる。よって、一定時間二次電池の放電をアシストして二次電池の負担を軽減するためには、キャパシタを用いた放電アシスト制御とは異なる制御が必要となる。つまり、二次電池とキャパシタとを単純な並列接続とした構成では、任意のタイミングでキャパシタの電力を二次電池の負担軽減のために用いることができない。 For this reason, when the state in which the discharge current to the load is higher than the predetermined value continues for a certain period of time, the discharge from the secondary battery becomes dominant with the passage of time. Therefore, in order to assist the discharge of the secondary battery for a certain period of time and reduce the burden on the secondary battery, a control different from the discharge assist control using the capacitor is required. That is, in the configuration in which the secondary battery and the capacitor are simply connected in parallel, the power of the capacitor cannot be used to reduce the burden on the secondary battery at an arbitrary timing.
　また、特許文献２に記載の電源装置のように、二次電池とキャパシタとの各々に接続された複数のＤＣ／ＤＣコンバータの動作を制御することによって、二次電池とキャパシタと出力を制御する場合には、二次電池からの電力をＤＣ／ＤＣコンバータが変換する際に変換ロスが生じ、この変換ロスの分、二次電池の負担が増える。 Further, like the power supply device described in Patent Document 2, the secondary battery, the capacitor, and the output are controlled by controlling the operations of a plurality of DC / DC converters connected to the secondary battery and the capacitor. In this case, a conversion loss occurs when the DC / DC converter converts the electric power from the secondary battery, and the burden on the secondary battery increases by this conversion loss.
　このため、任意のタイミングでキャパシタの電力を二次電池の負担軽減のために用いることができ、電力変換に伴う二次電池のロスを少なくできる手法が望まれているという課題があった。 For this reason, there has been a problem that a technique that can use the power of the capacitor at any timing to reduce the burden on the secondary battery and reduce the loss of the secondary battery due to power conversion is desired.
　本発明の目的は、上記課題を解決可能な電源装置および電力供給方法を提供することである。 An object of the present invention is to provide a power supply device and a power supply method capable of solving the above-described problems.
　本発明の電源装置は、
　二次電池と、
　キャパシタと、
　前記キャパシタの電圧を用いて前記二次電池の電圧以下である所定電圧を生成し、出力端子が負荷と接続された電圧生成手段と、
　前記二次電池と前記負荷との間に接続された特定スイッチと、
　前記特定スイッチを断続的にオンオフする制御手段と、を含む。 The power supply device of the present invention is
A secondary battery,
A capacitor;
A voltage generation unit that generates a predetermined voltage that is equal to or lower than the voltage of the secondary battery using the voltage of the capacitor, and an output terminal connected to a load;
A specific switch connected between the secondary battery and the load;
Control means for intermittently turning on and off the specific switch.
　本発明の電力供給方法は、
　二次電池と、キャパシタと、前記キャパシタの電圧を用いて前記二次電池の電圧以下である所定電圧を生成し、出力端子が負荷と接続された電圧生成手段と、前記二次電池と前記負荷との間に接続された特定スイッチと、を含む電源装置での電力供給方法であって、
　前記特定スイッチを断続的にオンオフする。 The power supply method of the present invention includes:
A secondary battery; a capacitor; a voltage generating means for generating a predetermined voltage equal to or lower than the voltage of the secondary battery using the voltage of the capacitor; and an output terminal connected to a load; the secondary battery and the load A power supply method including a specific switch connected between and a power supply device,
The specific switch is turned on and off intermittently.
　本発明によれば、任意のタイミングでキャパシタの電力を二次電池の負担軽減のために用いることができ、電力変換に伴う二次電池のロスを少なくすることが可能になる。 According to the present invention, the power of the capacitor can be used at any timing to reduce the burden on the secondary battery, and the loss of the secondary battery due to power conversion can be reduced.
本発明の第１実施形態の電源装置１００を示した図である。It is the figure which showed the power supply device 100 of 1st Embodiment of this invention. 電源装置１００の動作を説明するためのフロチャートである。3 is a flowchart for explaining the operation of the power supply apparatus 100. 第１実施形態におけるＰＷＭ制御の動作タイミングを説明するための図である。It is a figure for demonstrating the operation timing of the PWM control in 1st Embodiment. 第２の実施形態の電源装置１００Ａを示したブロック図である。It is the block diagram which showed power supply device 100A of 2nd Embodiment. 第２実施形態におけるＰＷＭ制御の動作タイミングを説明するための図である。It is a figure for demonstrating the operation timing of the PWM control in 2nd Embodiment. 第３実施形態におけるＰＷＭ制御の動作タイミングを説明するための図である。It is a figure for demonstrating the operation timing of the PWM control in 3rd Embodiment.
　以下、本発明の実施形態について図面を参照して説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
　（第１実施形態）
　図１は、本発明の第１実施形態の電源装置１００を示した図である。 (First embodiment)
FIG. 1 is a diagram showing a power supply device 100 according to the first embodiment of the present invention.
　図１において、電源装置１００は、二次電池１と、スイッチ２と、ＰＣＳ（Power　Control　System）３と、ダイオード４と、キャパシタ５と、スイッチ６と、ＤＣ／ＤＣコンバータ７と、ダイオード８と、スイッチ９と、電流制限用抵抗１０と、ダイオード１１と、制御回路１２と、電圧センサ１３および１４と、スナパ回路１５と、を含む。 In FIG. 1, a power supply device 100 includes a secondary battery 1, a switch 2, a PCS (Power Control System) 3, a diode 4, a capacitor 5, a switch 6, a DC / DC converter 7, and a diode 8. , Switch 9, current limiting resistor 10, diode 11, control circuit 12, voltage sensors 13 and 14, and snapper circuit 15.
　二次電池１は、例えば、リチウムイオン二次電池である。なお、二次電池１は、リチウム二次電池に限らず他の二次電池でもよい。 The secondary battery 1 is, for example, a lithium ion secondary battery. Note that the secondary battery 1 is not limited to a lithium secondary battery, and may be another secondary battery.
　二次電池１は、放電の抑制および遮断用のスイッチ２とダイオード４とを介して、ＰＣＳ３に接続されている。 The secondary battery 1 is connected to the PCS 3 through a switch 2 and a diode 4 for suppressing and interrupting discharge.
　スイッチ２は、特定スイッチの一例であり、例えば半導体スイッチ素子である。スイッチ２には、スイッチ２への突入電流を低減するため、スナバ回路１５が並列に接続されている。 The switch 2 is an example of a specific switch, for example, a semiconductor switch element. A snubber circuit 15 is connected to the switch 2 in parallel to reduce the inrush current to the switch 2.
　ＰＣＳ３は、負荷の一例である。ＰＣＳ３は、直流電力を交流電力に変換する。 PCS3 is an example of a load. The PCS 3 converts DC power into AC power.
　本実施形態では、ＰＣＳ３は、電流値Ｉ１の電流を必要とする駆動（以下「定常駆動」と称する）と、電流値Ｉ２（なお、Ｉ２＞Ｉ１）の電流を必要とする駆動（以下「大電流駆動」と称する）と、を択一的に行う。ＰＣＳ３は、大電流駆動を行う場合、制御信号（例えば、電流値Ｉ２の電流を要求する旨の制御信号）を出力する。 In the present embodiment, the PCS 3 is a drive that requires a current having a current value I1 (hereinafter referred to as “steady driving”) and a drive that requires a current having a current value I2 (hereinafter I2> I1) (hereinafter “large”). (Referred to as “current driving”). When performing a large current drive, the PCS 3 outputs a control signal (for example, a control signal for requesting a current having a current value I2).
　ダイオード４は、ＰＣＳ３から二次電池１へ流れる電流を遮断する向きで配置されている。 The diode 4 is arranged in such a direction as to interrupt the current flowing from the PCS 3 to the secondary battery 1.
　キャパシタ５は、例えば、リチウムイオンキャパシタである。なお、キャパシタ５は、リチウムイオンキャパシタに限らず、二次電池１よりも急速な充放電が可能であれば、他の種類のキャパシタ、あるいは大容量コンデンサでもかまわない。 The capacitor 5 is, for example, a lithium ion capacitor. The capacitor 5 is not limited to a lithium ion capacitor, and may be another type of capacitor or a large-capacity capacitor as long as charging and discharging can be performed more rapidly than the secondary battery 1.
　本実施形態では、キャパシタ５として、定格電圧の上限値が二次電池１の定格電圧の上限値以上であり、定格電圧の下限値が二次電池１の定格電圧の下限値以下であるキャパシタが用いられる。 In the present embodiment, as the capacitor 5, a capacitor whose upper limit value of the rated voltage is not less than the upper limit value of the rated voltage of the secondary battery 1 and whose lower limit value of the rated voltage is not more than the lower limit value of the rated voltage of the secondary battery 1 is used. Used.
　キャパシタ５は、放電遮断用のスイッチ６を介して定電圧出力型のＤＣ／ＤＣコンバータ７の入力部（入力端子）７ａに接続されている。 The capacitor 5 is connected to an input section (input terminal) 7a of a constant voltage output type DC / DC converter 7 through a switch 6 for interrupting discharge.
　スイッチ６は、所定スイッチの一例である。 The switch 6 is an example of a predetermined switch.
　ＤＣ／ＤＣコンバータ７は、電圧生成手段の一例であり、ＤＣ／ＤＣコンバータ７の出力部（出力端子）７ｂは、ダイオード８を介してＰＣＳ３に接続されている。 The DC / DC converter 7 is an example of a voltage generation unit, and an output unit (output terminal) 7b of the DC / DC converter 7 is connected to the PCS 3 via a diode 8.
　ダイオード８は、ＰＣＳ３からＤＣ／ＤＣコンバータ７へ流れる電流を遮断する向きで配置されている。 The diode 8 is arranged in such a direction as to interrupt the current flowing from the PCS 3 to the DC / DC converter 7.
　また、二次電池１は、ダイオード１１、スイッチ９および電流制限用抵抗１０を介して、キャパシタ５に接続されている。ダイオード１１、スイッチ９および電流制限用抵抗１０にて形成される経路は、二次電池１からキャパシタ５に電流を流す充電経路として機能する。 Further, the secondary battery 1 is connected to the capacitor 5 through the diode 11, the switch 9 and the current limiting resistor 10. A path formed by the diode 11, the switch 9, and the current limiting resistor 10 functions as a charging path through which current flows from the secondary battery 1 to the capacitor 5.
　スイッチ９は、充電用スイッチの一例である。 The switch 9 is an example of a charging switch.
　ダイオード１１は、キャパシタ５から二次電池１へ流れる電流を遮断する向きで配置されている。 The diode 11 is arranged in such a direction as to interrupt the current flowing from the capacitor 5 to the secondary battery 1.
　電圧センサ１３は、第１検出手段の一例であり、二次電池１の電圧を検出する。 The voltage sensor 13 is an example of a first detection unit and detects the voltage of the secondary battery 1.
　電圧センサ１４は、第２検出手段の一例であり、キャパシタ５の電圧を検出する。 The voltage sensor 14 is an example of a second detection unit and detects the voltage of the capacitor 5.
　制御回路１２は、制御手段の一例である。制御回路１２は、スイッチ２を断続的にオン・オフする。 The control circuit 12 is an example of a control means. The control circuit 12 turns on / off the switch 2 intermittently.
　本実施形態では、制御回路１２は、電圧センサ１３の検出結果（二次電池１３の電圧）と、電圧センサ１４の検出結果（キャパシタ５の電圧）と、ＰＣＳ３からの制御信号（例えば、電流値Ｉ２の電流を要求する旨の制御信号）と、に基づいて、スイッチ２のＰＷＭ（Pulse　Width　Modulation）制御と、スイッチ６およびスイッチ９の単純なオン・オフを制御する。 In the present embodiment, the control circuit 12 includes a detection result of the voltage sensor 13 (voltage of the secondary battery 13), a detection result of the voltage sensor 14 (voltage of the capacitor 5), and a control signal (for example, current value) from the PCS 3. The control signal for requesting the current I2) is controlled based on the PWM (Pulse Width Modulation) control of the switch 2 and the simple on / off of the switch 6 and the switch 9.
　定常時、つまり、ＰＣＳ３が定常駆動を行って制御信号を出力していない状況では、制御回路１２は、電圧センサ１３の検出結果に基づいて、二次電池１の電圧が所定値Ａ以上であるかどうかをチェックする。 In a constant state, that is, in a situation where the PCS 3 performs steady driving and does not output a control signal, the control circuit 12 determines that the voltage of the secondary battery 1 is greater than or equal to a predetermined value A based on the detection result of the voltage sensor 13. Check whether or not.
　所定値Ａは、二次電池１の使用可能電圧範囲（定格電圧）の下限値以上かつ上限値以下の値であり、第１閾値の一例である。本実施形態では、所定値Ａは、二次電池１の使用可能電圧範囲の上限値よりも下限値に近い値であり、電圧低下による二次電池１の内部短絡を生じない値である。 The predetermined value A is a value not less than the lower limit value and not more than the upper limit value of the usable voltage range (rated voltage) of the secondary battery 1, and is an example of a first threshold value. In the present embodiment, the predetermined value A is a value that is closer to the lower limit than the upper limit of the usable voltage range of the secondary battery 1 and is a value that does not cause an internal short circuit of the secondary battery 1 due to a voltage drop.
　定常時に、二次電池１の電圧が所定値Ａ以上のとき、制御回路１２は、以下の動作を実行する。 In the steady state, when the voltage of the secondary battery 1 is equal to or higher than the predetermined value A, the control circuit 12 performs the following operation.
　制御回路１２は、スイッチ２をオンし、二次電池１の電力をＰＣＳ３に放電する。さらに、制御回路１２は、スイッチ９をオンし、二次電池１からキャパシタ５への充電を可能な状態にする。なお、二次電池１からキャパシタ５に流れる電流は、電流制限用抵抗１０の抵抗値に応じて制限される。 The control circuit 12 turns on the switch 2 and discharges the power of the secondary battery 1 to the PCS 3. Further, the control circuit 12 turns on the switch 9 to enable charging of the capacitor 5 from the secondary battery 1. The current flowing from the secondary battery 1 to the capacitor 5 is limited according to the resistance value of the current limiting resistor 10.
　一方、定常時に、二次電池１の電圧が所定値Ａ未満に到達した場合は、制御回路１２は、以下の動作を実行する。 On the other hand, when the voltage of the secondary battery 1 reaches less than the predetermined value A during the steady state, the control circuit 12 performs the following operation.
　制御回路１２は、スイッチ２とスイッチ９をオフし、二次電池１からＰＣＳ３とキャパシタ５への放電を停止する。そして、二次電池１は、充電手段（不図示）によって充電される。 The control circuit 12 turns off the switch 2 and the switch 9 and stops discharging from the secondary battery 1 to the PCS 3 and the capacitor 5. The secondary battery 1 is charged by charging means (not shown).
　なお、制御回路１２は、二次電池１の電圧が所定値Ａより高くなるまで放電経路を復帰させない。その理由は、所定値Ａ付近でのリンギングを防止するためである。なお、制御回路１２は、放電経路の復帰を、スイッチ２とスイッチ９をオンにすることにより行う。 The control circuit 12 does not return the discharge path until the voltage of the secondary battery 1 becomes higher than the predetermined value A. The reason is to prevent ringing around the predetermined value A. The control circuit 12 performs the return of the discharge path by turning on the switch 2 and the switch 9.
　また、定常時に、制御回路１２は、電圧センサ１４の検出結果に基づいて、キャパシタ５の電圧が所定値Ｂ以上であるかどうかをチェックする。 In a steady state, the control circuit 12 checks whether the voltage of the capacitor 5 is equal to or higher than the predetermined value B based on the detection result of the voltage sensor 14.
　所定値Ｂは、キャパシタ５の使用可能電圧範囲（定格電圧）の下限値以上かつ上限値以下の値であり、第２閾値の一例である。本実施形態では、所定値Ｂは、キャパシタ５の使用可能電圧範囲の上限値よりも下限値に近い値であり、電圧低下によるキャパシタ５の内部短絡を生じない値である。 The predetermined value B is a value not less than the lower limit value and not more than the upper limit value of the usable voltage range (rated voltage) of the capacitor 5, and is an example of a second threshold value. In the present embodiment, the predetermined value B is a value closer to the lower limit than the upper limit of the usable voltage range of the capacitor 5 and is a value that does not cause an internal short circuit of the capacitor 5 due to a voltage drop.
　定常時に、キャパシタ５の電圧が所定値Ｂ以上のとき、制御回路１２は、以下の動作を実行する。 In the steady state, when the voltage of the capacitor 5 is equal to or higher than the predetermined value B, the control circuit 12 performs the following operation.
　制御回路１２は、スイッチ６をオンし、キャパシタ５からＤＣ／ＤＣコンバータ７に電圧を供給する。ＤＣ／ＤＣコンバータ７は、キャパシタ５の電圧を、電圧値が所定値Ａとなる電圧に変換し、所定値Ａの電圧を出力する。 The control circuit 12 turns on the switch 6 and supplies a voltage from the capacitor 5 to the DC / DC converter 7. The DC / DC converter 7 converts the voltage of the capacitor 5 into a voltage having a voltage value of a predetermined value A, and outputs a voltage of the predetermined value A.
　このようにして、ＤＣ／ＤＣコンバータ７の出力は、ダイオード８を介して、ダイオード４から出力される二次電池１の出力と合流する。 Thus, the output of the DC / DC converter 7 merges with the output of the secondary battery 1 output from the diode 4 via the diode 8.
　この時、ダイオード４、ダイオード８のうち、より電圧が高い方からＰＣＳ３に電流が流れる。 At this time, a current flows to the PCS 3 from the diode 4 or the diode 8 having the higher voltage.
　二次電池１の放電時の電圧は、ＤＣ／ＤＣコンバータ７の出力電圧である所定値Ａ以上となっており、二次電池１は、二次電池１の電圧が低下して所定値Ａ未満に到達した時点で放電を停止する。よって、定常時に、二次電池１が放電している状態では、ＤＣ／ＤＣコンバータ７からはＰＣＳ３に電流が流れない。 The voltage at the time of discharging of the secondary battery 1 is equal to or higher than a predetermined value A that is an output voltage of the DC / DC converter 7, and the secondary battery 1 is less than the predetermined value A because the voltage of the secondary battery 1 decreases. Discharge is stopped when reaching. Therefore, no current flows from the DC / DC converter 7 to the PCS 3 in a state where the secondary battery 1 is discharged in a steady state.
　次に、動作を説明する。 Next, the operation will be described.
　図２は、電源装置１００の動作を説明するためのフロチャートである。 FIG. 2 is a flowchart for explaining the operation of the power supply apparatus 100.
　まず、ステップ１０１において、制御回路１２は、電圧センサ１３から二次電池１の電圧を読み込み、続いて、ステップ１０２で、その電圧が所定値Ａ以上であるかどうかをチェックする。 First, in step 101, the control circuit 12 reads the voltage of the secondary battery 1 from the voltage sensor 13, and then in step 102, checks whether the voltage is equal to or greater than a predetermined value A.
　二次電池１の電圧が所定値Ａ以上であるときは、制御回路１２は、ステップ１０３において、電圧センサ１４からキャパシタ５の電圧を読み込み、続いて、ステップ１０４でその電圧値が所定値Ｂ以上であるかどうかをチェックする。 When the voltage of the secondary battery 1 is greater than or equal to the predetermined value A, the control circuit 12 reads the voltage of the capacitor 5 from the voltage sensor 14 in step 103, and then the voltage value is greater than or equal to the predetermined value B in step 104. Check if it is.
　キャパシタ５の電圧が所定値Ｂ以上であるときは、制御回路１２は、ステップ１０５において、ＰＷＭ制御のオンが可能な状態であると判断して、スイッチ２およびスイッチ６をオンとし、二次電池１とキャパシタ５の放電準備を整え、ステップ１０６に進む。 When the voltage of the capacitor 5 is equal to or higher than the predetermined value B, the control circuit 12 determines in step 105 that the PWM control can be turned on, turns on the switch 2 and the switch 6, and turns on the secondary battery. 1 and capacitor 5 are prepared for discharge, and the routine proceeds to step 106.
　なお、ステップ１０２で二次電池１の電圧が所定値Ａ未満、またはステップ１０３でキャパシタ５の電圧が所定値Ｂ未満の場合は、制御回路１２は、処理をステップ１０１に戻し、二次電池１の電圧の読み取りを繰り返す。 When the voltage of the secondary battery 1 is less than the predetermined value A in step 102 or the voltage of the capacitor 5 is less than the predetermined value B in step 103, the control circuit 12 returns the process to step 101, and the secondary battery 1 Repeat the voltage reading.
　ステップ１０６において、制御回路１２は、ＰＣＳ３から制御信号（電流値Ｉ２の電流を要求する旨の制御信号）を受信すると、ステップ１０７に進む。 In step 106, when the control circuit 12 receives a control signal (a control signal for requesting the current having the current value I2) from the PCS 3, the process proceeds to step 107.
　なお、ステップ１０６において、制御回路１２は、制御信号を受信していない場合は、処理をステップ１０１に戻し、二次電池１の電圧の読み取りを繰り返す。 In step 106, when the control circuit 12 has not received a control signal, the control circuit 12 returns the process to step 101 and repeats the reading of the voltage of the secondary battery 1.
　ステップ１０７では、制御回路１２は、二次電池１の電圧によらずスイッチ９をオフにして二次電池１からキャパシタ５への充電経路を強制的に遮断し、そして、スイッチ２についてのＰＷＭ制御をＯＮ状態にしてスイッチ２のオンとオフを繰り返す。 In step 107, the control circuit 12 turns off the switch 9 regardless of the voltage of the secondary battery 1 to forcibly cut off the charging path from the secondary battery 1 to the capacitor 5, and the PWM control for the switch 2. The switch 2 is turned on and off repeatedly.
　このため、ＰＷＭ制御がオン状態であるときには、二次電池１は間欠放電を行い、二次電池１の放電が間欠的に遮断されている時間にＤＣ／ＤＣコンバータ７からＰＣＳ３に電流が流れる。 For this reason, when the PWM control is in the ON state, the secondary battery 1 performs intermittent discharge, and current flows from the DC / DC converter 7 to the PCS 3 during the time when the discharge of the secondary battery 1 is intermittently interrupted.
　よって、ＰＷＭ制御中は、二次電池１とキャパシタ５とがＰＣＳ３への電力供給を分担する。 Therefore, during PWM control, the secondary battery 1 and the capacitor 5 share the power supply to the PCS 3.
　処理がステップ１０７に移行した後は、制御回路１２は、すぐに処理をステップ１０８に進め、二次電池１の電圧が所定値Ａ以上であるか判定する。 After the process proceeds to step 107, the control circuit 12 immediately proceeds to step 108 to determine whether the voltage of the secondary battery 1 is equal to or higher than the predetermined value A.
　制御回路１２は、二次電池１の電圧が所定値Ａ以上である場合は処理をステップ１０９に進め、二次電池１の電圧が所定値Ａ未満である場合は処理をステップ１１１に進めＰＷＭ制御を終了する。 The control circuit 12 advances the process to step 109 when the voltage of the secondary battery 1 is equal to or higher than the predetermined value A, and advances the process to step 111 when the voltage of the secondary battery 1 is less than the predetermined value A, and performs PWM control. Exit.
　ステップ１０９では、制御回路１２は、キャパシタ５の電圧が所定値Ｂ以上であるか判定する。 In step 109, the control circuit 12 determines whether the voltage of the capacitor 5 is equal to or higher than a predetermined value B.
　制御回路１２は、キャパシタ５の電圧が所定値Ｂ以上である場合は処理をステップ１１０に進め、キャパシタ５の電圧が所定値Ｂ未満である場合は処理をステップ１１１に進めＰＷＭ制御を終了する。 The control circuit 12 advances the process to step 110 when the voltage of the capacitor 5 is equal to or higher than the predetermined value B, and advances the process to step 111 when the voltage of the capacitor 5 is less than the predetermined value B, and ends the PWM control.
　ステップ１１０では、制御回路１２は、ＰＣＳ３から制御信号を受信しているか判定する。 In step 110, the control circuit 12 determines whether a control signal is received from the PCS 3.
　制御回路１２は、ＰＣＳ３から制御信号を継続して受信している場合は処理をステップ１０８に戻し、ＰＣＳ３からの制御信号の受信が終了した場合は処理をステップ１１１に進めＰＷＭ制御を終了する。 The control circuit 12 returns the process to step 108 when the control signal is continuously received from the PCS 3, and advances the process to step 111 when the reception of the control signal from the PCS 3 is finished, and ends the PWM control.
　このようにして、ＰＷＭ制御を開始すると、二次電池１の容量切れ、または、キャパシタ５の容量切れ、または、ＰＣＳ３からの制御信号（ＰＷＭ制御要求）の終了まで、ＰＷＭ制御が継続することとなる。 Thus, when PWM control is started, the PWM control continues until the secondary battery 1 runs out of capacity, the capacitor 5 runs out of capacity, or the control signal (PWM control request) from the PCS 3 ends. Become.
　なお、ステップ１１１において、二次電池１の電圧が所定値Ａ以上になった場合、制御回路１２は、スイッチ９を再びオンにし、二次電池１からキャパシタ５への充電経路を復帰する。 In step 111, when the voltage of the secondary battery 1 becomes equal to or higher than the predetermined value A, the control circuit 12 turns on the switch 9 again to restore the charging path from the secondary battery 1 to the capacitor 5.
　また、キャパシタ５の電圧がＰＷＭ制御の実施により所定値Ｂ未満に到達した場合は、制御回路１２は、スイッチ６をオフし、キャパシタ５からＤＣ／ＤＣコンバータ７への放電を停止する。 Further, when the voltage of the capacitor 5 reaches less than the predetermined value B by performing the PWM control, the control circuit 12 turns off the switch 6 and stops the discharge from the capacitor 5 to the DC / DC converter 7.
　制御回路１２は、二次電池１からキャパシタ５への充電によってキャパシタ５の電圧が所定値Ｂより高くなるまで、キャパシタ５からＤＣ／ＤＣコンバータ７への放電経路を復帰させない。その理由は、所定値Ｂ付近でのリンギングを防止するためである。 The control circuit 12 does not return the discharge path from the capacitor 5 to the DC / DC converter 7 until the voltage of the capacitor 5 becomes higher than the predetermined value B by charging the capacitor 5 from the secondary battery 1. The reason is to prevent ringing in the vicinity of the predetermined value B.
　なお、制御回路１２は、放電経路の復帰を、スイッチ９をオンにすることにより実行する。このとき、キャパシタ５の定格電圧の上限値と下限値を二次電池１より広くしているため、キャパシタ５の電圧は、使用可能電圧範囲内で安全に推移する。 The control circuit 12 executes the return of the discharge path by turning on the switch 9. At this time, since the upper limit value and the lower limit value of the rated voltage of the capacitor 5 are made wider than those of the secondary battery 1, the voltage of the capacitor 5 safely transitions within the usable voltage range.
　図３は、第１実施形態におけるＰＷＭ制御の動作タイミングを説明するための図である。 FIG. 3 is a diagram for explaining the operation timing of the PWM control in the first embodiment.
　図３（Ａ）に示すように、時刻t0から時刻t1までＰＣＳ３への定常的な電流が流れつつ、時刻t1のタイミングで大電流期間が発生する。 As shown in FIG. 3A, a steady current flows to the PCS 3 from time t0 to time t1, and a large current period occurs at the timing of time t1.
　図３（Ｂ）に示すように、時刻t1のタイミングで制御回路１２は、ＰＣＳ３からの制御信号を受信し、ＰＷＭ制御を開始する。 As shown in FIG. 3B, the control circuit 12 receives a control signal from the PCS 3 at the timing of time t1, and starts PWM control.
　図３（Ｃ）、図３（Ｄ）に示すように、時刻t0から時刻t1まで、二次電池１のみで放電を行っていたものが、大電流期間の開始タイミングである時刻t1からは、二次電池１とキャパシタ５が放電を交互に行い、二次電池１の負担を減らしている。 As shown in FIGS. 3C and 3D, from the time t1 that is the start timing of the large current period from the time t0 to the time t1, only the secondary battery 1 was discharged. The secondary battery 1 and the capacitor 5 discharge alternately, reducing the burden on the secondary battery 1.
　図３（Ｅ）に示すように、時刻t1以降では、電圧が所定値Ａ以上となる二次電池１の出力と、電圧が所定値ＡとなるＤＣ／ＤＣコンバータ７の電圧とが、交互にＰＣＳ３に出力される。このため、時刻t1以降では、ＰＣＳ３に対して出力される電圧は、矩形波のようになる。 As shown in FIG. 3E, after time t1, the output of the secondary battery 1 whose voltage is equal to or higher than the predetermined value A and the voltage of the DC / DC converter 7 whose voltage is equal to the predetermined value A are alternately displayed. It is output to PCS3. For this reason, after time t1, the voltage output to the PCS 3 becomes a rectangular wave.
　キャパシタ５として急速放電可能なキャパシタを用いることで、ＰＷＭ制御中、二次電池１の出力遮断後のＤＣ／ＤＣコンバータ７からの電力供給はスムーズに行われる。このため、二次電池１とキャパシタ５は、要求された電流を切れ間なく供給することができる。 By using a capacitor capable of rapid discharge as the capacitor 5, power supply from the DC / DC converter 7 after the output of the secondary battery 1 is cut off is smoothly performed during PWM control. For this reason, the secondary battery 1 and the capacitor 5 can supply the requested current without interruption.
　次に、本実施形態の効果を説明する。 Next, the effect of this embodiment will be described.
　本実施形態は以上のように構成され、二次電池１の出力と、ＤＣ／ＤＣコンバータ７で定電圧化したキャパシタの出力を、ＰＷＭ制御とダイオードを用いて合成して出力する。 The present embodiment is configured as described above, and the output of the secondary battery 1 and the output of the capacitor that has been made constant voltage by the DC / DC converter 7 are combined and output using PWM control and a diode.
　本実施形態は、二次電池１と、キャパシタ５と、出力端子７ｂがＰＣＳ３と接続されキャパシタ５の電力を用いて二次電池１の電圧以下である所定電圧（所定値Ａ）を生成するＤＣ／ＤＣコンバータ７と、二次電池１とＰＣＳ３との間に接続されたスイッチ２と、スイッチ２を断続的にオンオフする制御回路１２と、を含む。 In the present embodiment, the secondary battery 1, the capacitor 5, and the output terminal 7 b are connected to the PCS 3, and DC is used to generate a predetermined voltage (predetermined value A) that is equal to or lower than the voltage of the secondary battery 1 using the power of the capacitor 5. / DC converter 7, switch 2 connected between secondary battery 1 and PCS 3, and control circuit 12 for turning on / off switch 2 intermittently.
　このため、スイッチ２を断続的にオンオフすることによって、二次電池１の電圧を断続的にＰＣＳ３に供給しつつ、二次電池１の電圧の供給が断続的に停止されている間は、キャパシタ５の電圧を変換して出力するＤＣ／ＤＣコンバータ７の出力電圧をＰＣＳ３に供給することが可能になる。 Therefore, by intermittently turning on and off the switch 2, the voltage of the secondary battery 1 is intermittently supplied to the PCS 3 while the supply of the voltage of the secondary battery 1 is intermittently stopped. The output voltage of the DC / DC converter 7 that converts and outputs the voltage 5 can be supplied to the PCS 3.
　したがって、二次電池１を用いた電源装置１００において、二次電池１と電圧特性の異なるキャパシタ５を、任意のタイミングで任意の時間、二次電池１の放電の負担を軽減するために使用でき、二次電池１の寿命を延ばすことが可能となる。また、二次電池１の出力を変換することなくＰＣＳ３に供給するため、電力変換に伴う二次電池のロスを少なくすることが可能になる。 Therefore, in the power supply device 100 using the secondary battery 1, the capacitor 5 having a voltage characteristic different from that of the secondary battery 1 can be used for reducing the discharge burden of the secondary battery 1 at an arbitrary timing for an arbitrary time. The life of the secondary battery 1 can be extended. Moreover, since the output of the secondary battery 1 is supplied to the PCS 3 without conversion, it is possible to reduce the loss of the secondary battery due to power conversion.
　なお、上記効果は、二次電池１と、キャパシタ５と、出力端子７ｂがＰＣＳ３と接続されキャパシタ５の電力を用いて二次電池１の電圧以下である所定電圧（所定値Ａ）を生成するＤＣ／ＤＣコンバータ７と、二次電池１とＰＣＳ３との間に接続されたスイッチ２と、スイッチ２を断続的にオンオフする制御回路１２と、からなる電源装置でも奏する。 In addition, the said effect produces | generates the predetermined voltage (predetermined value A) below the voltage of the secondary battery 1 using the electric power of the secondary battery 1, the capacitor 5, and the output terminal 7b being connected with PCS3, and the capacitor 5. The power supply apparatus includes the DC / DC converter 7, the switch 2 connected between the secondary battery 1 and the PCS 3, and the control circuit 12 that turns the switch 2 on and off intermittently.
　また、本実施形態では、制御回路１２は、電圧センサ１３の検出結果が所定値Ａ以上であり電圧センサ１４の検出結果が所定値Ｂ以上である場合に、スイッチ２を断続的にオンオフする。このため、二次電池１とキャパシタ５が予め設定された放電を行える状況で、二次電池１とキャパシタ５を放電させることが可能になる。 In the present embodiment, the control circuit 12 intermittently turns on and off the switch 2 when the detection result of the voltage sensor 13 is equal to or greater than the predetermined value A and the detection result of the voltage sensor 14 is equal to or greater than the predetermined value B. For this reason, it becomes possible to discharge the secondary battery 1 and the capacitor 5 in a situation where the secondary battery 1 and the capacitor 5 can perform a preset discharge.
　また、本実施形態では、制御回路１２は、電圧センサ１４の検出結果が所定値Ｂ以上である場合に、スイッチ６をオンする。このため、キャパシタ５が予め設定された放電を行える状況でキャパシタ５を放電させることが可能になる。 In this embodiment, the control circuit 12 turns on the switch 6 when the detection result of the voltage sensor 14 is equal to or greater than the predetermined value B. For this reason, it becomes possible to discharge the capacitor 5 in a situation where the capacitor 5 can perform a preset discharge.
　また、本実施形態では、制御回路１２は、ＰＣＳ３からの制御信号（電力の供給を指示する制御信号）に応じてスイッチ２を断続的にオンオフし、ＰＣＳ３から制御信号を受け付けておらず電圧センサ１３の検出結果が所定値Ａ以上である場合には、スイッチ９をオンする。このため、二次電池１が放電可能な状況でＰＣＳ３への放電を行っていない場合に、二次電池１にてキャパシタ５を充電することが可能になる。 In the present embodiment, the control circuit 12 intermittently turns on and off the switch 2 in response to a control signal from the PCS 3 (a control signal instructing the supply of power), and does not accept the control signal from the PCS 3. When the detection result of 13 is equal to or greater than the predetermined value A, the switch 9 is turned on. For this reason, the capacitor 5 can be charged by the secondary battery 1 when the secondary battery 1 is not discharged to the PCS 3 in a state where the secondary battery 1 can be discharged.
　（第２実施形態）
　次に、本発明の第２実施形態の電源装置１００Ａを説明する。 (Second Embodiment)
Next, the power supply device 100A according to the second embodiment of the present invention will be described.
　図４は、第２の実施形態の電源装置１００Ａを示したブロック図である。なお、図４において、図１に示したものと同一構成のものには同一符号を付してある。 FIG. 4 is a block diagram showing a power supply device 100A of the second embodiment. In FIG. 4, the same components as those shown in FIG.
　第２の実施形態の電源装置１００Ａでは、ＰＣＳ３に電流を供給する電流経路に電流センサ１６が配置され、制御回路１４の代わりに制御回路１７が設けられた点が、第１実施形態の電源装置１００との主な相違点である。 In the power supply device 100A of the second embodiment, the current sensor 16 is arranged in the current path for supplying current to the PCS 3, and the control circuit 17 is provided instead of the control circuit 14, which is the power supply device of the first embodiment. This is the main difference from 100.
　制御回路１７は、電流センサ１６にて検出された電流情報を基に、ＰＣＳ３に流れる電流の平均値を演算し、その演算結果が所定値Ｃを超えたことをＰＷＭ制御を開始するためのトリガーとする点が、制御回路１４と異なっている。 The control circuit 17 calculates the average value of the current flowing through the PCS 3 based on the current information detected by the current sensor 16, and triggers PWM control to start that the calculation result exceeds a predetermined value C. Is different from the control circuit 14.
　本実施形態では、制御回路１７は、電流センサ１６にて検出された電流情報を基に、所定期間（例えば１秒以上の期間）での電流の平均値を演算する。なお、所定期間は、１秒以上の期間に限らず適宜変更可能である。 In the present embodiment, the control circuit 17 calculates an average value of current in a predetermined period (for example, a period of 1 second or more) based on the current information detected by the current sensor 16. The predetermined period is not limited to a period of 1 second or longer and can be changed as appropriate.
　図５は、第２実施形態におけるＰＷＭ制御の動作タイミングを説明するための図である。 FIG. 5 is a diagram for explaining the operation timing of the PWM control in the second embodiment.
　図５（Ａ）に示すように、時刻t0から時刻t1まで、ＰＣＳ３への定常的な電流が流れつつ、時刻t1のタイミングで、ＰＣＳ３への電流が所定値Ｃを超える大電流期間が発生する。 As shown in FIG. 5A, a constant current to PCS3 flows from time t0 to time t1, and a large current period in which the current to PCS3 exceeds a predetermined value C occurs at the timing of time t1. .
　図５（Ｂ）に示すように、時刻t1での大電流期間発生後、電流センサ１６にて検出された電流値を基に演算されたＰＣＳ３への放電電流の平均値が所定値Ｃを超えたタイミングである時刻t2で、制御回路１７は、ＰＷＭ制御を開始する。 As shown in FIG. 5B, the average value of the discharge current to the PCS 3 calculated based on the current value detected by the current sensor 16 after the occurrence of the large current period at time t1 exceeds the predetermined value C. At time t2, which is the determined timing, the control circuit 17 starts PWM control.
　図５（Ｃ）、図５（Ｄ）に示すように、時刻t0から時刻t2までの期間では二次電池１のみで放電を行っていたものが、時刻t1以降におけるＰＣＳ３への放電電流の平均値が所定値Ｃを超える時刻t2からは、二次電池１とキャパシタ５で放電を交互に行い、二次電池１の負担が減らされている。 As shown in FIG. 5C and FIG. 5D, the average of the discharge current to the PCS 3 after the time t1 is the one that was discharged only by the secondary battery 1 in the period from the time t0 to the time t2. From time t2 when the value exceeds the predetermined value C, the secondary battery 1 and the capacitor 5 are alternately discharged, and the burden on the secondary battery 1 is reduced.
　図５（Ｅ）に示すように、時刻t2以降では、電圧が所定値Ａ以上となる二次電池１の出力（電圧）と、電圧が所定値ＡとなるＤＣ／ＤＣコンバータ７の電圧とが、交互にＰＣＳ３に出力される。このため、時刻t2以降では、ＰＣＳ３に対して出力される電圧は、矩形波のようになる。 As shown in FIG. 5E, after time t2, the output (voltage) of the secondary battery 1 at which the voltage is equal to or higher than the predetermined value A and the voltage of the DC / DC converter 7 at which the voltage is at the predetermined value A are obtained. Are alternately output to the PCS 3. For this reason, after time t2, the voltage output to the PCS 3 is a rectangular wave.
　本実施形態は以上のように構成され、第１実施形態と同じ効果を有するとともに電源装置から負荷へと大電流が引かれたときに、自動的にＰＷＭ制御が行われることにより、予期せぬ大電流放電時に二次電池の負担を減らすことが可能になり、電流変動に強いという利点を有する。 The present embodiment is configured as described above, and has the same effect as the first embodiment, and when a large current is drawn from the power supply device to the load, the PWM control is automatically performed, which is unexpected. It is possible to reduce the burden on the secondary battery during large current discharge, and it has an advantage of being resistant to current fluctuation.
　（第３実施形態）
　次に、本発明の第３実施形態の電源装置を説明する。 (Third embodiment)
Next, the power supply device of 3rd Embodiment of this invention is demonstrated.
　第３実施形態の電源装置は、第２実施形態の電源装置１００Ａにおいて、制御回路１７が、PWM制御を行う際、ＰＣＳ３に流れる電流の平均値の大きさに応じてPWM制御のデューティー比を変え、ＰＣＳ３に流れる電流の平均値が大きくなるほどキャパシタ５の放電レートを上げる機能さらに有するものである。その他の構成は、図４に示した第２実施形態の電源装置１００Ａと同様である。 In the power supply device of the third embodiment, in the power supply device 100A of the second embodiment, when the control circuit 17 performs the PWM control, the duty ratio of the PWM control is changed according to the average value of the current flowing through the PCS3. The function of increasing the discharge rate of the capacitor 5 as the average value of the current flowing through the PCS 3 increases. Other configurations are the same as those of the power supply apparatus 100A of the second embodiment shown in FIG.
　図６は、第３実施形態におけるＰＷＭ制御の動作タイミングを説明するための図である。 FIG. 6 is a diagram for explaining the operation timing of PWM control in the third embodiment.
　図６（Ａ）に示すように、時刻t0から時刻t1までの期間ではＰＣＳ３への定常的な電流が流れつつ、時刻t1のタイミングで、ＰＣＳ３へ流れる電流が所定値Ｄを超える電流増加が起こり、さらに時刻t3でＰＣＳ３へ流れる電流が所定値Ｅを超える電流増加が起こっている。 As shown in FIG. 6A, a steady current flows to the PCS 3 during the period from the time t0 to the time t1, and the current flowing to the PCS 3 exceeds the predetermined value D at the timing of the time t1. Further, at time t3, the current flowing to the PCS 3 exceeds the predetermined value E.
　図６（Ｂ）に示すように、定常時のＤＣ／ＤＣコンバータ７からの電流が流れていない状態をＰＷＭ制御のデューティー比0とし、時刻t1の大電流発生後、制御回路１７は、電流センサ１６の電流値を基に演算されたＰＣＳ３への放電電流の平均値が所定値Ｄを超えたタイミングである時刻t2で、ＰＷＭ制御を開始し、そのデューティー比を0から所定値Ｆに引き上げる。 As shown in FIG. 6B, the state in which no current flows from the DC / DC converter 7 in a steady state is set to a duty ratio 0 of PWM control, and after the generation of a large current at time t1, the control circuit 17 At time t2, which is the timing when the average value of the discharge current to the PCS 3 calculated based on the current value of 16 exceeds the predetermined value D, PWM control is started and the duty ratio is raised from 0 to the predetermined value F.
　その後、制御回路１７は、放電電流の平均値が所定値Ｅを超えたタイミングである時刻t4でさらにそのデューティー比を所定値Ｆから所定値Ｇに引き上げる。 Thereafter, the control circuit 17 further increases the duty ratio from the predetermined value F to the predetermined value G at time t4, which is the timing when the average value of the discharge current exceeds the predetermined value E.
　図６（Ｃ）、図６（Ｄ）、図６（Ｅ）に示すように、制御回路１７は、ＰＣＳ３に流れる電流量が増加するのに応じて、二次電池１の放電レートを減らし、キャパシタ５の放電寄与率を上げている。 As shown in FIGS. 6 (C), 6 (D), and 6 (E), the control circuit 17 reduces the discharge rate of the secondary battery 1 as the amount of current flowing through the PCS 3 increases. The discharge contribution rate of the capacitor 5 is increased.
　本実施形態は以上のように構成され、第２実施形態と同じ効果を有するとともに、電流値の大小に対応した二次電池１の負荷低減が可能になり、負荷の要求する電流が定まらず放電レートが大きく変動する電源装置システムに適用可能となる。 The present embodiment is configured as described above, and has the same effect as the second embodiment. In addition, the load of the secondary battery 1 corresponding to the magnitude of the current value can be reduced, and the current required by the load is not determined and is discharged. The present invention can be applied to a power supply system in which the rate varies greatly.
　なお、上記各実施形態において、負荷としてＰＣＳが用いられたが、負荷はＰＣＳに限らず適宜変更可能である。 In each of the above embodiments, the PCS is used as the load. However, the load is not limited to the PCS and can be changed as appropriate.
　以上説明した各実施形態において、図示した構成は単なる一例であって、本発明はその構成に限定されるものではない。 In each of the embodiments described above, the illustrated configuration is merely an example, and the present invention is not limited to the configuration.
　実施形態を参照して本願発明を説明したが、本願発明は上記実施形態に限定されるものではない。本願発明の構成や詳細には、本願発明のスコープ内で当業者が理解し得る様々な変更をすることができる。この出願は、２０１３年５月８日に出願された日本出願特願２０１３－９８４５５を基礎とする優先権を主張し、その開示の全てをここに取り込む。 Although the present invention has been described with reference to the embodiments, the present invention is not limited to the above-described embodiments. Various changes that can be understood by those skilled in the art can be made to the configuration and details of the present invention within the scope of the present invention. This application claims the priority on the basis of Japanese application Japanese Patent Application No. 2013-98455 for which it applied on May 8, 2013, and takes in those the indications of all here.
　　　１　　　二次電池
　　　２　　　スイッチ
　　　３　　　ＰＣＳ
　　　４　　　ダイオード
　　　５　　　キャパシタ
　　　６　　　スイッチ
　　　７　　　ＤＣ／ＤＣコンバータ
　　　８　　　ダイオード
　　　９　　　スイッチ
　　１０　　　電流制限用抵抗
　　１１　　　ダイオード
　　１２　　　制御回路
　　１３、１４　電圧センサ
　　１５　　　スナバ回路
　　１６　　　電流センサ
　　１７　　　制御回路 1 Secondary battery 2 Switch 3 PCS
4 Diode 5 Capacitor 6 Switch 7 DC / DC Converter 8 Diode 9 Switch 10 Current Limiting Resistor 11 Diode 12 Control Circuit 13, 14 Voltage Sensor 15 Snubber Circuit 16 Current Sensor 17 Control Circuit

Claims (10)

  1. 　二次電池と、
    　キャパシタと、
    　前記キャパシタの電圧を用いて前記二次電池の電圧以下である所定電圧を生成し、出力端子が負荷と接続された電圧生成手段と、
    　前記二次電池と前記負荷との間に接続された特定スイッチと、
    　前記特定スイッチを断続的にオンオフする制御手段と、を含む電源装置。     A secondary battery,
    A capacitor;
    A voltage generation unit that generates a predetermined voltage that is equal to or lower than the voltage of the secondary battery using the voltage of the capacitor, and an output terminal connected to a load;
    A specific switch connected between the secondary battery and the load;
    Control means for intermittently turning on and off the specific switch.
  2. 　前記制御手段は、前記電力の供給を指示する制御信号に応じて、前記特定スイッチを断続的にオンオフする、請求項１に記載の電源装置。 The power supply device according to claim 1, wherein the control means intermittently turns on and off the specific switch in response to a control signal instructing the supply of power.
  3. 　前記二次電池または前記電圧生成手段から前記負荷に流れる電流を検出する電流検出手段をさらに含み、
    　前記制御手段は、前記電流検出手段の検出結果が所定値よりも大きくなると、前記特定スイッチを断続的にオンオフする、請求項１に記載の電源装置。     Current detection means for detecting current flowing from the secondary battery or the voltage generation means to the load;
    The power supply device according to claim 1, wherein the control unit intermittently turns on and off the specific switch when a detection result of the current detection unit becomes larger than a predetermined value.
  4. 　前記制御手段は、前記電流検出手段の検出結果が大きくなるほど、前記特定スイッチを断続的にオンオフする状況での前記特定スイッチのオフ期間を長くする、請求項３に記載の電源装置。 4. The power supply device according to claim 3, wherein the control means lengthens an off period of the specific switch in a situation where the specific switch is intermittently turned on / off as the detection result of the current detection means increases.
  5. 　前記二次電池の電圧を検出する第１検出手段と、
    　前記キャパシタの電圧を検出する第２検出手段と、をさらに含み、
    　前記制御手段は、前記第１検出手段の検出結果が第１閾値以上であり前記第２検出手段の検出結果が第２閾値以上である場合に、前記特定スイッチを断続的にオンオフする、請求項１から４のいずれか１項に記載の電源装置。     First detection means for detecting a voltage of the secondary battery;
    Second detection means for detecting the voltage of the capacitor,
    The control means intermittently turns on and off the specific switch when a detection result of the first detection means is a first threshold value or more and a detection result of the second detection means is a second threshold value or more. The power supply device according to any one of 1 to 4.
  6. 　前記キャパシタと前記電圧生成手段の入力端子との間に接続された所定スイッチをさらに含み、
    　前記制御手段は、前記第２検出手段の検出結果が前記第２閾値以上である場合に、前記所定スイッチをオンする、請求項５に記載の電源装置。     A predetermined switch connected between the capacitor and the input terminal of the voltage generating means;
    The power supply device according to claim 5, wherein the control unit turns on the predetermined switch when a detection result of the second detection unit is equal to or greater than the second threshold value.
  7. 　前記二次電池と前記キャパシタとの間に接続され前記二次電池の電荷を用いて前記キャパシタを充電するための充電用スイッチをさらに含み、
    　前記制御手段は、前記特定スイッチを断続的にオンオフしていない状況で前記第１検出手段の検出結果が前記第１閾値以上である場合には、前記充電用スイッチをオンする、請求項５または６に記載の電源装置。     A charge switch connected between the secondary battery and the capacitor for charging the capacitor using the charge of the secondary battery;
    The control unit turns on the charging switch when the detection result of the first detection unit is not less than the first threshold value in a situation where the specific switch is not intermittently turned on / off. 6. The power supply device according to 6.
  8. 　前記電圧生成手段は、前記所定電圧として、前記二次電池の定格電圧の下限値の電圧を生成する、請求項１から７のいずれか１項に記載の電源装置。 The power supply device according to any one of claims 1 to 7, wherein the voltage generation unit generates a voltage of a lower limit value of a rated voltage of the secondary battery as the predetermined voltage.
  9. 　前記キャパシタは、前記二次電池よりも急速な充放電が可能であり、定格電圧の上限値が前記二次電池の定格電圧の上限値以上であり、かつ、定格電圧の下限値が前記二次電池の定格電圧の下限値以下である、請求項１から８のいずれか１項に記載の電源装置。 The capacitor can be charged and discharged more rapidly than the secondary battery, the upper limit value of the rated voltage is equal to or higher than the upper limit value of the rated voltage of the secondary battery, and the lower limit value of the rated voltage is the secondary battery. The power supply device according to any one of claims 1 to 8, wherein the power supply device is equal to or lower than a lower limit value of a rated voltage of the battery.
  10. 　二次電池と、キャパシタと、前記キャパシタの電圧を用いて前記二次電池の電圧以下である所定電圧を生成し、出力端子が負荷と接続された電圧生成手段と、前記二次電池と前記負荷との間に接続された特定スイッチと、を含む電源装置での電力供給方法であって、
    　前記特定スイッチを断続的にオンオフする、電力供給方法。     A secondary battery; a capacitor; a voltage generating means for generating a predetermined voltage equal to or lower than the voltage of the secondary battery using the voltage of the capacitor; and an output terminal connected to a load; the secondary battery and the load A power supply method including a specific switch connected between and a power supply device,
    A power supply method for intermittently turning on and off the specific switch.
PCT/JP2014/060373 2013-05-08 2014-04-10 Power source device and power supply method WO2014181631A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2015515825A JPWO2014181631A1 (en) 2013-05-08 2014-04-10 Power supply device and power supply method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013098455 2013-05-08
JP2013-098455 2013-05-08

Publications (1)

Publication Number Publication Date
WO2014181631A1 true WO2014181631A1 (en) 2014-11-13

Family

ID=51867113

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2014/060373 WO2014181631A1 (en) 2013-05-08 2014-04-10 Power source device and power supply method

Country Status (2)

Country Link
JP (1) JPWO2014181631A1 (en)
WO (1) WO2014181631A1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07308032A (en) * 1994-05-10 1995-11-21 Nippondenso Co Ltd Two output voltage generator motor system
JP2002291169A (en) * 2001-03-28 2002-10-04 Denso Corp On-board double-power-supply circuit with motor- generator
JP2007237856A (en) * 2006-03-07 2007-09-20 Toyota Motor Corp Vehicular power supply system
JP2010273428A (en) * 2009-05-20 2010-12-02 Mitsubishi Electric Corp Vehicle drive power supply unit
JP2012075280A (en) * 2010-09-29 2012-04-12 Panasonic Corp Power supply device for vehicle

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04244741A (en) * 1991-01-28 1992-09-01 Matsushita Electric Works Ltd Battery-drives electric equipment
JPH0530608A (en) * 1991-07-17 1993-02-05 Aisin Aw Co Ltd Hybrid system for electric automobile
JPH11215735A (en) * 1998-01-26 1999-08-06 Oki Electric Ind Co Ltd Or circuit for power supply
JP2008086148A (en) * 2006-09-28 2008-04-10 Brother Ind Ltd Power circuit
JP5609226B2 (en) * 2010-04-12 2014-10-22 トヨタ自動車株式会社 Power supply

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07308032A (en) * 1994-05-10 1995-11-21 Nippondenso Co Ltd Two output voltage generator motor system
JP2002291169A (en) * 2001-03-28 2002-10-04 Denso Corp On-board double-power-supply circuit with motor- generator
JP2007237856A (en) * 2006-03-07 2007-09-20 Toyota Motor Corp Vehicular power supply system
JP2010273428A (en) * 2009-05-20 2010-12-02 Mitsubishi Electric Corp Vehicle drive power supply unit
JP2012075280A (en) * 2010-09-29 2012-04-12 Panasonic Corp Power supply device for vehicle

Also Published As

Publication number Publication date
JPWO2014181631A1 (en) 2017-02-23

Similar Documents

Publication Publication Date Title
JP6541884B2 (en) DC / DC converter
US9868358B2 (en) Power conversion system suppressing reduction in conversion efficiency
JP6024706B2 (en) Power converter
US20140083988A1 (en) Systems and methods providing controlled ac arc welding processes
JP2007209056A (en) Capacitor device
JP2007159370A (en) Bidirectional power conversion device with reverse power flow prevention function
JP6365880B2 (en) Power converter
JP2012005265A (en) Dc-dc converter
US8817490B2 (en) DC-DC converter
JP2005197030A (en) Fuel cell system equipped with current sensor correcting function
US20130336014A1 (en) Electric power conversion circuit
JP7330817B2 (en) Power distribution system and method
JP2009142061A (en) Dc-dc converter
JP2015046992A (en) Vehicle power supply device
WO2014181631A1 (en) Power source device and power supply method
JP2006014570A (en) Power regeneration method and converter device using the same
JP2007267582A (en) Step-up/step-down chopper device and driving method therefor
WO2016129415A1 (en) Power conversion device
JP2011211812A (en) Power unit
JP2012175871A (en) Motor controller and system
CN110771023B (en) Synchronous rectification type DC-DC converter and switching power supply device
JP2015122937A (en) Driving device of synchronous rectification apparatus
TW201608795A (en) Charging method and charging system using the same
JP5429656B1 (en) DC power supply
JP5073847B1 (en) Secondary battery charge / discharge method

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14794876

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2015515825

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 14794876

Country of ref document: EP

Kind code of ref document: A1