JP2004328853A - Charging method and power unit - Google Patents

Charging method and power unit Download PDF

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Publication number
JP2004328853A
JP2004328853A JP2003117841A JP2003117841A JP2004328853A JP 2004328853 A JP2004328853 A JP 2004328853A JP 2003117841 A JP2003117841 A JP 2003117841A JP 2003117841 A JP2003117841 A JP 2003117841A JP 2004328853 A JP2004328853 A JP 2004328853A
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Japan
Prior art keywords
voltage
charging
storage battery
circuit
value
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JP2003117841A
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JP4021360B2 (en
Inventor
Takeshi Matsumura
毅 松村
Hirotaka Asami
浩隆 浅見
Takahisa Masashiro
尊久 正代
Keiichi Saito
景一 斉藤
Hiroshi Wakagi
寛 若木
Takuya Sudo
卓也 須藤
Koji Arai
幸次 新井
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Shindengen Electric Manufacturing Co Ltd
Origin Electric Co Ltd
Nippon Telegraph and Telephone Corp
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Shindengen Electric Manufacturing Co Ltd
Origin Electric Co Ltd
Nippon Telegraph and Telephone Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)
  • Dc-Dc Converters (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power unit which can stably charge a storage battery. <P>SOLUTION: A control circuit 22 makes a charge circuit 23 perform step-down operation while the charge voltage of the storage battery 25 is low, and lowers a DC voltage that a rectifying circuit 21 outputs, and supplies it to the storage battery 25. When the charge voltage of the storage battery 25 goes up and reaches a reference voltage, the control circuit 22 lowers the voltage value of the DC voltage that the rectifying circuit 21 outputs, and switches the operation of the charge circuit 23 from a step-down operation to a step-up operation, and continues the charge to the storage battery. Since the voltage value of the charge voltage and the voltage value of a DC voltage do not become equal, switching from the step-down operation to the step-up operation is performed stably. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は電源装置の技術にかかり、特に、電源装置が有する昇降圧型の蓄電池によって蓄電池を充電する技術に関する。
【０００２】
【従来の技術】
図３の符号１１０は、従来技術の電源装置を示している。
この電源装置１１０は整流回路１２１を有しており、商用電源１１３が出力する交流電圧を整流回路１２１で整流平滑し、直流電圧を負荷１１４に供給するように構成されている。
【０００３】
また、電源装置１１０内には、蓄電池１２５と充電回路１２３とが設けられている。充電回路１２３は、整流回路１２１の出力電圧を電圧変換し、蓄電池１２５を充電するように構成されている。
【０００４】
ここで整流回路１２１が出力する直流電圧の電圧値が蓄電池１２５の充電電圧の電圧値よりも高い場合、充電回路１２３は降圧動作によって直流電圧を降圧して蓄電池１２５に印加する。逆に蓄電池１２５の充電電圧が直流電圧の電圧値よりも高い場合、充電回路１２３は昇圧動作によって直流電圧を昇圧して蓄電池１２５に印加する。
【０００５】
従って、蓄電池１２５が未充電、若しくは放電した状態から充電が開始されると、充電回路１２３は先ず降圧動作によって蓄電池１２５を充電した後、昇圧動作に切り替わり、満充電まで蓄電池１２５を充電する。
【０００６】
そして、停電等の異常事態があり、整流回路１２１から出力される直流電圧の電圧値が最小許容電圧よりも低下すると、放電回路１２４が動作を開始し、蓄電池１２５に蓄積されたエネルギーが放電回路１２４によって取り出され、整流回路１２１に換わり、蓄電池１２５と放電回路１２４が負荷１１４に定電圧を供給する。
【０００７】
【特許文献１】特開平１０−４２５５０号公報
【特許文献２】特開平５−３２８７１２号公報
【特許文献３】実開平６−７０４８６号公報
【発明が解決しようとする課題】
しかしながら、蓄電池１２５の充電電圧が上昇し、整流回路１２１が出力する直流電圧に近接した場合、充電回路１２３の降圧動作と昇圧動作の切り替えに不都合が生じる。例えば、昇圧動作と降圧動作が同時に行われたり、充電回路１２３の動作が間欠的に停止するなどの問題が生じる。
【０００８】
本発明は上記従来技術の不都合を解決するために創作されたものであり、その目的は、蓄電池を安定に充電できる充電方法と、その充電方法に従って動作できる電源装置を提供することにある。
【０００９】
【課題を解決するための手段】
上記課題を解決するために、請求項１記載の発明は、交流電圧を整流平滑して直流電圧を生成し、前記直流電圧を負荷に供給すると共に、前記直流電圧を電圧変換し、蓄電池に印加して前記蓄電池を充電する蓄電池の充電方法であって、予め、前記直流電圧と接地電位の間の大きさの基準電圧を設定し、前記蓄電池の充電電圧が、前記基準電圧と前記接地電位の間の大きさである間は、前記直流電圧を降圧させて前記蓄電池に印加し、前記蓄電池の充電が進み、前記充電電圧が前記基準電圧を超えると、前記直流電圧の電圧値を前記充電電圧と前記接地電位の間の大きさに変更し、前記直流電圧を昇圧させて前記蓄電池に印加する蓄電池の充電方法である。
請求項２記載の発明は、交流電圧を整流平滑して直流電圧を生成し、前記直流電圧を負荷に供給する整流回路と、前記直流電圧を電圧変換し、蓄電池に印加して前記蓄電池を充電する充電回路と、予め、前記直流電圧と接地電位の間の大きさの基準電圧が設定された制御回路とを有し、前記制御回路は、前記蓄電池の充電電圧を検出し、該充電電圧が、前記基準電圧と前記接地電位の間の大きさである間は、前記充電回路によって前記直流電圧を降圧させて前記蓄電池に印加させ、前記蓄電池の充電が進み、前記充電電圧が前記基準電圧を超えると、前記制御回路は、前記直流電圧の電圧値を前記充電電圧と前記接地電位の間の大きさに変更すると共に、前記充電回路には前記直流電圧を昇圧させ、その昇圧された電圧を前記蓄電池に印加するように構成された電源装置である。
【００１０】
本発明は上記のように構成されており、先ず、充電回路が直流電圧を降圧して蓄電池を充電し、蓄電池の充電電圧を上昇させているため、充電電圧が直流電圧に近づくと、充電回路の降圧動作ができなくなるため、直流電圧よりも接地電位に近い基準電圧に達すると直流電圧の電圧値を変更し、充電電圧よりも接地電位に近い電圧値にしており、充電回路は降圧動作から昇圧動作に切り替わることで、蓄電池への充電を継続することが可能となる。
【００１１】
直流電圧の変更は、充電電圧が、充電回路の降圧動作が正常に行える大きさの間に行われ、且つ、変更後の直流電圧の電圧値は、充電回路が昇圧動作を正常に行えるように設定される。
【００１２】
【発明の実施の形態】
図１の符号１０は本発明の一例の電源装置を示している。以下、接地電位をゼロＶとし、電圧値は接地電位を基準とする。
【００１３】
この電源装置１０は整流回路２１を有しており、該整流回路２１は、交流電圧源１３から入力される交流電圧を整流平滑し、直流電圧ＥＤに変換して負荷１４に供給するように構成されている。
【００１４】
また、電源装置１０は、蓄電池２５と、充電回路２３と、放電回路２４と、制御回路２２とを有している。
【００１５】
充電回路２３は、整流回路２１が出力する直流電圧ＥＤを降圧又は昇圧して蓄電池２５に印加し、蓄電池２５を充電するように構成されており、他方、放電回路２４は、蓄電池２５の充電電圧ＥＣを電圧変換し、負荷１４に供給するように構成されている。
【００１６】
整流回路２１が出力する直流電圧ＥＤと蓄電池２５の充電電圧ＥＣの電圧値は、制御回路２２に入力されている。また、制御回路２２には予め基準電圧Ｖｒｅｆが設定されている。
【００１７】
制御回路２２は、直流電圧ＥＤの電圧値と、充電電圧ＥＣの電圧値と、基準電圧Ｖｒｅｆとの大小関係から、整流回路２１と充電回路２３と放電回路２４とを制御し、蓄電池２５への充放電を行う。
【００１８】
具体的には、整流回路２１の直流電圧ＥＤが正常値である場合、制御回路２２は放電回路２４は動作させず、他方、蓄電池２５の充電電圧ＥＣが満充電状態にある場合、充電回路２３は動作させない。
【００１９】
次に、直流電圧ＥＤが正常値であり、且つ、蓄電池２５の充電電圧ＥＣが基準電圧Ｖｒｅｆよりも低い場合は、制御回路２２は整流回路２１を制御し、直流電圧ＥＤを基準電圧Ｖｒｅｆよりも大きい第一の電圧値Ｖｏｕｔ１に設定すると共に、充電回路２３を降圧動作させ、直流電圧ＥＤを電圧降下させて蓄電池２５の充電端子に印加する。
【００２０】
出力電圧ＥＤ＝第一の電圧値Ｖｏｕｔ１であり、電源回路１０が正電圧出力の場合、Ｖｏｕｔ１＞Ｖｒｅｆである。以下、電源回路１０は正電圧出力であるとして大小関係の符号を付す。
【００２１】
充電回路２３は定電流出力に設定されており、蓄電池２５の充電端子に印加される電圧は、蓄電池２５に供給される電流が定電流になるように自動的に制御される。
【００２２】
図２は、未充電の蓄電池２５を充電する場合の充電曲線を示すグラフであり、充電回路２３は、時刻ｔ＝０で充電を開始したものとすると、充電電圧ＥＣは、時間ｔ＝０のときの初期値Ｖ０（Ｖ０＜Ｖｒｅｆ）から定電流充電され、略直線的に増加する。
【００２３】
充電が進行し、時刻ｔ１において充電電圧ＥＣが基準電圧Ｖｒｅｆを超えたものとすると（Ｖｒｅｆ＜ＥＣ）、制御回路２２は、時刻ｔ１において、整流回路２１の直流電圧ＥＤを、基準電圧Ｖｒｅｆよりも小さい第二の電圧値（Ｖｏｕｔ２＜Ｖｒｅｆ＜Ｖｏｕｔ１）に変更すると共に、充電回路２３の動作を降圧動作から昇圧動作に変更する。
【００２４】
直流電圧ＥＤの電圧値は第一の電圧値Ｖｏｕｔ１から第二の電圧値Ｖｏｕｔ２に低下し、そのため、充電電圧ＥＣの電圧値（ＥＤ＝Ｖｒｅｆ）は、直流電圧ＥＤの電圧値（ＥＤ＝第二の電圧値Ｖｏｕｔ２）よりも高くなっているため、充電回路２３は正常に昇圧動作ができ、整流回路２１の直流電圧ＥＤは昇圧されて蓄電池２５の充電端子に印加される。
【００２５】
ここでも充電回路２３は定電流出力で動作し、蓄電池２５の充電端子に印加される電圧は、蓄電池２５に一定電流が供給されるように自動的に変化する。
【００２６】
以上のように蓄電池２５が充電され、所定の電圧値になると充電作業は終了し、蓄電池２５は満充電の状態になる。
【００２７】
図２の符号ＶｍａｘとＶｍｉｎは、負荷１４に許容される最大許容電圧と最小許容電圧を示している（０＜Ｖｍｉｎ＜Ｖｏｕｔ２＜Ｖｒｅｆ＜Ｖｏｕｔ１＜Ｖｍａｘ）。
【００２８】
蓄電池２５が満充電された状態から、交流電圧源１３の電圧低下などにより、整流回路２１が出力する直流電圧ＥＤが規定値、例えば最小許容電圧Ｖｍｉｎを下回ると制御回路２２は整流回路２１を負荷１４から切り離すと共に放電回路２４の動作を開始させ、蓄電池２５を放電回路２４を介して負荷１４に接続する。
【００２９】
放電回路２４は、充電電圧ＥＣを電圧降下させ、最小許容電圧Ｖｍｉｎと最大許容電圧Ｖｍａｘの中間の一定電圧を生成して負荷１４に印加すると、負荷１４には、整流回路２１に代わって蓄電池２５から電力が供給される。
【００３０】
なお、蓄電池２５を充電する際に直流電圧ＥＤの電圧値を第一の電圧値Ｖｏｕｔ１から第二の電圧値Ｖｏｕｔ２に低下させた後、蓄電池２５の充電が進行すると、充電電圧ＥＣは第一の電圧値Ｖｏｕｔ１を超えるので、その状態になったら、直流電圧ＥＤの電圧値を第二の電圧値Ｖｏｕｔ２から第一の電圧値Ｖｏｕｔ１に復帰させるようにしてもよい。
【００３１】
また、上記実施例の電源装置１０は、負荷１４に正電圧を供給する電源であったが、負電圧を供給する電源装置も本発明に含まれる。この場合、各電圧値は、
０＞Ｖｍｉｎ＞Ｖｏｕｔ２＞Ｖｒｅｆ＞Ｖｏｕｔ１＞Ｖｍａｘ
の関係にある。
【００３２】
【発明の効果】
充電動作が安定な電源装置を提供できる。
【図面の簡単な説明】
【図１】本発明の電源装置の一例のブロック図
【図２】本発明の充電方法を説明するためのグラフ
【図３】従来技術の電源装置
【符号の説明】
１０……電源装置
２１……整流回路
２２……制御回路
２３……充電回路
２４……放電回路
２５……蓄電池
Ｖｒｅｆ……基準電圧[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a technology of a power supply device, and more particularly to a technology of charging a storage battery with a step-up / step-down storage battery included in the power supply device.
[0002]
[Prior art]
Reference numeral 110 in FIG. 3 indicates a conventional power supply device.
The power supply device 110 has a rectifier circuit 121. The rectifier circuit 121 rectifies and smoothes an AC voltage output from a commercial power supply 113, and supplies a DC voltage to a load 114.
[0003]
Further, a storage battery 125 and a charging circuit 123 are provided in the power supply device 110. The charging circuit 123 converts the output voltage of the rectifier circuit 121 into a voltage, and charges the storage battery 125.
[0004]
Here, when the voltage value of the DC voltage output from rectifier circuit 121 is higher than the voltage value of the charging voltage of storage battery 125, charging circuit 123 lowers the DC voltage by a step-down operation and applies the voltage to storage battery 125. Conversely, when the charging voltage of the storage battery 125 is higher than the DC voltage value, the charging circuit 123 boosts the DC voltage by a boosting operation and applies the DC voltage to the storage battery 125.
[0005]
Therefore, when charging is started from a state where the storage battery 125 is not charged or discharged, the charging circuit 123 first charges the storage battery 125 by a step-down operation, then switches to a step-up operation, and charges the storage battery 125 until it is fully charged.
[0006]
Then, when there is an abnormal situation such as a power failure and the voltage value of the DC voltage output from the rectifier circuit 121 becomes lower than the minimum allowable voltage, the discharge circuit 124 starts operating, and the energy stored in the storage battery 125 is discharged. The storage battery 125 and the discharge circuit 124 supply a constant voltage to the load 114 instead of the rectifier circuit 121.
[0007]
[Patent Document 1] Japanese Patent Application Laid-Open No. 10-42550 [Patent Document 2] Japanese Patent Application Laid-Open No. 5-328712 [Patent Document 3] Japanese Utility Model Application Laid-Open No. 6-70486 [Problems to be Solved by the Invention]
However, when the charging voltage of the storage battery 125 rises and approaches the DC voltage output by the rectifier circuit 121, inconvenience occurs in switching between the step-down operation and the step-up operation of the charging circuit 123. For example, there arise problems such as the step-up operation and the step-down operation being performed simultaneously, the operation of the charging circuit 123 being intermittently stopped, and the like.
[0008]
SUMMARY OF THE INVENTION The present invention has been made to solve the above-described disadvantages of the related art, and has as its object to provide a charging method capable of stably charging a storage battery and a power supply device operable according to the charging method.
[0009]
[Means for Solving the Problems]
In order to solve the above problem, the invention according to claim 1 rectifies and smoothes an AC voltage to generate a DC voltage, supplies the DC voltage to a load, converts the DC voltage into a voltage, and applies the converted voltage to a storage battery. And charging the storage battery by setting a reference voltage of a magnitude between the DC voltage and the ground potential in advance, wherein the charging voltage of the storage battery is the reference voltage and the ground potential. While the magnitude is between, the DC voltage is stepped down and applied to the storage battery, charging of the storage battery proceeds, and when the charging voltage exceeds the reference voltage, the voltage value of the DC voltage is reduced to the charging voltage. A method for charging a storage battery, wherein the DC voltage is increased and applied to the storage battery by changing the magnitude to a value between the DC voltage and the ground potential.
According to a second aspect of the present invention, a rectifier circuit that rectifies and smoothes an AC voltage to generate a DC voltage and supplies the DC voltage to a load, converts the DC voltage into a voltage, and applies the DC voltage to a storage battery to charge the storage battery. And a control circuit in which a reference voltage having a magnitude between the DC voltage and the ground potential is set in advance, and the control circuit detects a charge voltage of the storage battery, and the charge voltage is While the magnitude is between the reference voltage and the ground potential, the DC voltage is stepped down by the charging circuit and applied to the storage battery, charging of the storage battery proceeds, and the charging voltage is equal to the reference voltage. If it exceeds, the control circuit changes the voltage value of the DC voltage to a magnitude between the charging voltage and the ground potential, and the charging circuit boosts the DC voltage, and the boosted voltage is Applied to the storage battery A power source device constructed as.
[0010]
The present invention is configured as described above.First, since the charging circuit steps down the DC voltage to charge the storage battery and raises the charging voltage of the storage battery, the charging circuit approaches the DC voltage when the charging voltage approaches the DC voltage. When the reference voltage is closer to the ground potential than the DC voltage, the voltage value of the DC voltage is changed to a voltage value closer to the ground potential than the charging voltage. By switching to the step-up operation, it is possible to continue charging the storage battery.
[0011]
The change of the DC voltage is performed while the charging voltage is large enough to normally perform the step-down operation of the charging circuit, and the voltage value of the changed DC voltage is set so that the charging circuit can normally perform the step-up operation. Is set.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Reference numeral 10 in FIG. 1 indicates a power supply device according to an example of the present invention. Hereinafter, the ground potential is set to zero volt, and the voltage value is based on the ground potential.
[0013]
The power unit 10 has a rectifying circuit 21, rectifier circuit 21, an AC voltage input from the AC voltage source 13 by rectifying and smoothing, so as to supply to the load 14 into a DC voltage E D It is configured.
[0014]
The power supply device 10 includes a storage battery 25, a charging circuit 23, a discharging circuit 24, and a control circuit 22.
[0015]
The charging circuit 23 is applied to the storage battery 25 to the DC voltage E D of the rectifying circuit 21 outputs the step-down or step-up to, is configured to charge the battery 25, while the discharge circuit 24 charges the battery 25 the voltage E C voltage conversion, and is configured to supply to the load 14.
[0016]
Value of the charging voltage E C of the DC voltage E D and the storage battery 25 to the rectifier circuit 21 outputs is inputted to the control circuit 22. Further, a reference voltage V ref is set in the control circuit 22 in advance.
[0017]
The control circuit 22 includes a voltage value of the DC voltage E D, the value of the charging voltage E C, the magnitude relationship between the reference voltage V ref, and controls the rectifier circuit 21 and the charging circuit 23 and discharge circuit 24, storage battery 25 is charged and discharged.
[0018]
Specifically, when the DC voltage E D of the rectifying circuit 21 is a normal value, the control circuit 22 and discharging circuit 24 is not operated, while when the charging voltage E C of the battery 25 is fully charged, the charge The circuit 23 is not operated.
[0019]
Then, the DC voltage E D is the normal value, and, when the charging voltage E C of the battery 25 is lower than the reference voltage V ref, the control circuit 22 controls the rectifying circuit 21, a reference DC voltage E D and sets the first voltage value V out1 greater than the voltage V ref, the charging circuit 23 is step-down operation, the DC voltage E D by the voltage drop is applied to the charging terminal of the battery 25.
[0020]
Output voltage E D = first voltage value V out1 , and when power supply circuit 10 outputs a positive voltage, V out1 > V ref . Hereinafter, the power supply circuit 10 will be denoted by a reference sign of magnitude assuming that it is a positive voltage output.
[0021]
The charging circuit 23 is set to a constant current output, and the voltage applied to the charging terminal of the storage battery 25 is automatically controlled so that the current supplied to the storage battery 25 becomes a constant current.
[0022]
Figure 2 is a graph showing a charging curve when charging a storage battery 25 uncharged, the charging circuit 23, assuming that starts charging at time t = 0, the charging voltage E C is the time t = 0 , The battery is charged at a constant current from the initial value V 0 (V 0 <V ref ), and increases substantially linearly.
[0023]
Charging progresses, assuming that the charging voltage E C exceeds the reference voltage V ref at time t 1 (V ref <E C ), the control circuit 22 at time t 1, the DC voltage E D of the rectifying circuit 21 Is changed to a second voltage value ( Vout2 < Vref < Vout1 ) smaller than the reference voltage Vref, and the operation of the charging circuit 23 is changed from the step-down operation to the step-up operation.
[0024]
The voltage value of the DC voltage E D decreases from the first voltage value V out1 to a second voltage value V out2, therefore, the voltage value of the charging voltage E C (E D = V ref ) is, DC voltage E D since is higher than the voltage value (E D = second voltage value V out2), the charging circuit 23 may boost operate normally, the DC voltage E D of the rectifying circuit 21 is a charging terminal of the battery 25 is boosted Is applied.
[0025]
Also in this case, the charging circuit 23 operates with a constant current output, and the voltage applied to the charging terminal of the storage battery 25 automatically changes so that a constant current is supplied to the storage battery 25.
[0026]
As described above, when the storage battery 25 is charged and reaches a predetermined voltage value, the charging operation ends, and the storage battery 25 is fully charged.
[0027]
Code V max and V min of FIG. 2 shows the maximum allowable voltage and the minimum allowable voltage allowed to the load 14 (0 <V min <V out2 <V ref <V out1 <V max).
[0028]
From a state where the storage battery 25 is fully charged, the drop in the voltage of the AC voltage source 13, DC voltage E D is specified value rectifier circuit 21 outputs, for example, the minimum allowable voltage V min to below the control circuit 22 rectifying circuit 21 Is disconnected from the load 14 and the operation of the discharge circuit 24 is started, and the storage battery 25 is connected to the load 14 via the discharge circuit 24.
[0029]
Discharge circuit 24 causes the voltage drop charging voltage E C, is applied to the load 14 to generate an intermediate constant voltage minimum allowable voltage V min and a maximum allowable voltage V max, the load 14, instead of the rectifier circuit 21 Thus, power is supplied from the storage battery 25.
[0030]
Incidentally, after the voltage value of the DC voltage E D from the first voltage value V out1 is reduced to the second voltage value V out2 when charging the battery 25, the charging of the battery 25 progresses, the charging voltage E C since more than a first voltage value V out1, When in that state, may be a voltage value of the DC voltage E D from the second voltage value V out2 so as to return to the first voltage value V out1.
[0031]
Further, the power supply device 10 of the above embodiment is a power supply that supplies a positive voltage to the load 14, but a power supply device that supplies a negative voltage is also included in the present invention. In this case, each voltage value is
0> V min > V out2 > V ref > V out1 > V max
In a relationship.
[0032]
【The invention's effect】
A power supply device with stable charging operation can be provided.
[Brief description of the drawings]
FIG. 1 is a block diagram of an example of a power supply device according to the present invention. FIG. 2 is a graph illustrating a charging method according to the present invention. FIG.
10 Power supply device 21 Rectifier circuit 22 Control circuit 23 Charge circuit 24 Discharge circuit 25 Storage battery V ref Reference voltage

Claims (2)

交流電圧を整流平滑して直流電圧を生成し、前記直流電圧を負荷に供給すると共に、前記直流電圧を電圧変換し、蓄電池に印加して前記蓄電池を充電する蓄電池の充電方法であって、
予め、前記直流電圧と接地電位の間の大きさの基準電圧を設定し、
前記蓄電池の充電電圧が、前記基準電圧と前記接地電位の間の大きさである間は、前記直流電圧を降圧させて前記蓄電池に印加し、
前記蓄電池の充電が進み、前記充電電圧が前記基準電圧を超えると、前記直流電圧の電圧値を前記充電電圧と前記接地電位の間の大きさに変更し、前記直流電圧を昇圧させて前記蓄電池に印加する蓄電池の充電方法。A method for charging a storage battery that rectifies and smoothes an AC voltage to generate a DC voltage, supplies the DC voltage to a load, converts the DC voltage, applies the voltage to the storage battery, and charges the storage battery.
In advance, a reference voltage having a magnitude between the DC voltage and the ground potential is set,
While the charging voltage of the storage battery is between the reference voltage and the ground potential, the DC voltage is reduced and applied to the storage battery,
When the charging of the storage battery proceeds and the charging voltage exceeds the reference voltage, the voltage value of the DC voltage is changed to a value between the charging voltage and the ground potential, and the DC voltage is boosted to increase the DC voltage. Method of charging the storage battery to be applied to the battery. 交流電圧を整流平滑して直流電圧を生成し、前記直流電圧を負荷に供給する整流回路と、
前記直流電圧を電圧変換し、蓄電池に印加して前記蓄電池を充電する充電回路と、
予め、前記直流電圧と接地電位の間の大きさの基準電圧が設定された制御回路とを有し、
前記制御回路は、前記蓄電池の充電電圧を検出し、該充電電圧が、前記基準電圧と前記接地電位の間の大きさである間は、前記充電回路によって前記直流電圧を降圧させて前記蓄電池に印加させ、前記蓄電池の充電が進み、前記充電電圧が前記基準電圧を超えると、前記制御回路は、前記直流電圧の電圧値を前記充電電圧と前記接地電位の間の大きさに変更すると共に、前記充電回路には前記直流電圧を昇圧させ、その昇圧された電圧を前記蓄電池に印加するように構成された電源装置。A rectifier circuit that rectifies and smoothes the AC voltage to generate a DC voltage and supplies the DC voltage to a load;
A charging circuit that converts the DC voltage and applies the voltage to the storage battery to charge the storage battery,
A control circuit in which a reference voltage having a magnitude between the DC voltage and the ground potential is set in advance;
The control circuit detects a charging voltage of the storage battery, and while the charging voltage is between the reference voltage and the ground potential, the charging circuit reduces the DC voltage to supply the storage battery. When the charging of the storage battery proceeds and the charging voltage exceeds the reference voltage, the control circuit changes the voltage value of the DC voltage to a value between the charging voltage and the ground potential, A power supply device configured to boost the DC voltage in the charging circuit and apply the boosted voltage to the storage battery.
JP2003117841A 2003-04-23 2003-04-23 Charging method and power supply device Expired - Fee Related JP4021360B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8055917B2 (en) 2007-02-09 2011-11-08 Samsung Electronics Co., Ltd. Computer and power supply method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8055917B2 (en) 2007-02-09 2011-11-08 Samsung Electronics Co., Ltd. Computer and power supply method thereof

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