JPH07163064A - Power supply device for solar battery - Google Patents
Power supply device for solar batteryInfo
- Publication number
- JPH07163064A JPH07163064A JP5339182A JP33918293A JPH07163064A JP H07163064 A JPH07163064 A JP H07163064A JP 5339182 A JP5339182 A JP 5339182A JP 33918293 A JP33918293 A JP 33918293A JP H07163064 A JPH07163064 A JP H07163064A
- Authority
- JP
- Japan
- Prior art keywords
- storage battery
- solar cell
- voltage
- supply device
- power supply
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
Classifications
-
- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Photovoltaic Devices (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、太陽電池を利用した電
子機器、特に該太陽電池のバックアップ用として設けら
れる蓄電池の過充電を防止し、常に蓄電池の最大許容電
圧以下に制御しうる太陽電池の電源装置に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device using a solar cell, and more particularly to a solar cell capable of preventing overcharge of a storage battery provided as a backup of the solar cell and constantly controlling the storage battery to a maximum allowable voltage or less. Of the power supply device.
【０００２】[0002]
【従来の技術】従来の太陽電池の電源装置においては、
第１の従来例として、図４に示すように太陽電池１から
逆流防止用ダイオード２を介して負荷３に電力を供給さ
せる装置で、該太陽電池１は受光量や電池の温度特性に
よりその出力が不安定となるために、該太陽電池１と負
荷３との間に蓄電池４を並列に接続し、負荷３に対し電
力の安定供給を図っている。例えば、太陽電池１からの
供給電力が消費電力より大きい場合は、両者の差の電力
が蓄電池４に充電され、また、太陽電池１の供給電力が
逆に消費電力より小さい場合は、蓄電池４より不足分電
力を供給する。この場合、蓄電池４の充放電の一方が連
続して行われることが起こり、過充電及び過放電が発生
するため、蓄電池４の特性が劣化し、寿命が短くなって
しまう。2. Description of the Related Art In a conventional solar cell power supply device,
As a first conventional example, as shown in FIG. 4, a device for supplying electric power from a solar cell 1 to a load 3 via a backflow prevention diode 2, and the solar cell 1 outputs its output depending on the amount of light received and the temperature characteristics of the battery. Therefore, the storage battery 4 is connected in parallel between the solar cell 1 and the load 3 in order to stabilize the supply of electric power to the load 3. For example, when the power supplied from the solar cell 1 is greater than the power consumption, the storage battery 4 is charged with the power of the difference between the two, and when the power supplied to the solar cell 1 is conversely less than the power consumption, Supply shortage power. In this case, one of charging and discharging of the storage battery 4 is continuously performed, and overcharging and overdischarging occur, so that the characteristics of the storage battery 4 are deteriorated and the life thereof is shortened.
【０００３】そこで、第２の従来例として、図５に示す
ように太陽電池１に並列に接続された蓄電池４及び該太
陽電池１からの電圧が最大許容電圧に達すると電圧レベ
ルを検出するために太陽電池１と並列に接続した充電電
圧検出回路５と、該充電電圧検出回路５からの出力信号
太陽電池１と蓄電池４間に直列に接続した過充電防止回
路６から構成されている。このような回路構成にするこ
とで、太陽電池１から蓄電池４へ充電される電圧が該蓄
電池４の許容電圧を越えないようにしている。Therefore, as a second conventional example, the voltage level is detected when the voltage from the storage battery 4 connected in parallel to the solar cell 1 and the solar cell 1 reaches the maximum allowable voltage as shown in FIG. The charging voltage detecting circuit 5 is connected in parallel with the solar cell 1, and an output signal from the charging voltage detecting circuit 5 is connected between the solar cell 1 and the storage battery 4 in series. With such a circuit configuration, the voltage charged from the solar cell 1 to the storage battery 4 does not exceed the allowable voltage of the storage battery 4.
【０００４】[0004]
【発明が解決しようとする課題】ところで、前述第１の
従来例では太陽電池１によって蓄電池４に充電される電
圧を最大許容電圧以下に抑えることが不可能である。ま
た、前述第２の従来例では太陽電池１によって蓄電池４
に充電される電圧を過充電防止回路６により、最大許容
電圧以下に抑えることができるが、回路構成が複雑であ
るといった問題点があった。By the way, in the above-mentioned first conventional example, it is impossible to suppress the voltage charged in the storage battery 4 by the solar cell 1 to the maximum allowable voltage or less. In addition, in the second conventional example described above, the storage battery 4 is formed by the solar cell 1.
Although the overcharge prevention circuit 6 can suppress the voltage charged to the maximum allowable voltage or less, there is a problem in that the circuit configuration is complicated.
【０００５】本発明は、前述従来例の問題点に鑑み、簡
単な回路構成で蓄電池への過充電防止を可能とした太陽
電池の電源装置を提供することを目的とする。The present invention has been made in view of the above-mentioned problems of the prior art, and an object thereof is to provide a power supply device for a solar cell capable of preventing overcharge of a storage battery with a simple circuit configuration.
【０００６】[0006]
【課題を解決するための手段】前述の目的を達成するた
めに、本発明は複数個の太陽電池素子と、該太陽電池素
子から得られた電力を蓄える蓄電池と、該蓄電池の端子
電圧を検出する充電電圧検出回路と、該蓄電池の最大許
容電圧と端子電圧を比較しその電位差を検出して制御す
るマイコン等の制御回路からなる太陽電池の電源装置に
おいて、該蓄電池の最大許容電圧と該蓄電池の電圧差に
よって太陽電池素子の接続を切換えるためのスイッチ素
子とスイッチング制御回路とを備えたものである。In order to achieve the above-mentioned object, the present invention detects a plurality of solar cell elements, a storage cell for storing electric power obtained from the solar cell elements, and a terminal voltage of the storage cell. In a power supply device for a solar cell, which comprises a charging voltage detection circuit and a control circuit such as a microcomputer which compares a maximum allowable voltage of the storage battery with a terminal voltage and detects a potential difference between them, the maximum allowable voltage of the storage battery and the storage battery A switching element and a switching control circuit for switching the connection of the solar cell elements depending on the voltage difference of the above.
【０００７】[0007]
【作用】以上の構成の太陽電池の電源装置は蓄電池の充
電電圧に応じてスイッチ素子及びスイッチング制御回路
により過充電を防止し、蓄電池の端子電圧を最大許容電
圧値以下に維持させることが可能になる。With the above-described structure, the solar battery power supply device can prevent overcharge by the switch element and the switching control circuit according to the charging voltage of the storage battery, and can keep the terminal voltage of the storage battery below the maximum allowable voltage value. Become.
【０００８】[0008]
【実施例】以下、本発明の一実施例を図１ないし図３に
基づいて説明する。図１は本実施例の構成を示すブロッ
ク図である。同図において、１１は複数個の太陽電池素
子からなる太陽電池、１２はスイッチＳｗ１〜Ｓｗ１０
からなるスイッチ素子で、太陽電池１１を構成する複数
の太陽電池素子にそれぞれ接続されている。１３はスイ
ッチング制御回路で、スイッチ素子１２が接続されてい
る。１４は逆流防止用ダイオード、１５は蓄電池であ
り、スイッチング制御回路１２と蓄電池１５は逆流防止
用ダイオード１４を介して並列に接続されている。１６
は充電電圧検出回路で、蓄電池１５と並列に接続されて
いる。１７はマイコン等の制御回路で、充電電圧検出回
路１６と並列に接続するとともにスイッチング制御回路
１２の一部に接続されており、太陽電池１１を電源とす
る電子機器の各種動作を制御するものであってもよい。
１８は負荷で、制御回路１７に並列に接続されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a block diagram showing the configuration of this embodiment. In the figure, 11 is a solar cell including a plurality of solar cell elements, and 12 is switches Sw1 to Sw10.
The switch element is composed of a switch element and is connected to each of the plurality of solar cell elements forming the solar cell 11. A switching control circuit 13 is connected to the switch element 12. Reference numeral 14 is a backflow prevention diode, 15 is a storage battery, and the switching control circuit 12 and the storage battery 15 are connected in parallel via the backflow prevention diode 14. 16
Is a charging voltage detection circuit, which is connected in parallel with the storage battery 15. Reference numeral 17 denotes a control circuit such as a microcomputer, which is connected in parallel with the charging voltage detection circuit 16 and is also connected to a part of the switching control circuit 12, and controls various operations of electronic equipment using the solar cell 11 as a power source. It may be.
A load 18 is connected in parallel with the control circuit 17.
【０００９】以上の構成の本実施例の動作を図２のフロ
ーチャートを用いて説明する。まず、ステップ１で光源
より照射された光エネルギーは、複数の太陽電池１１に
より光電変換され、逆流防止用のダイオード１４を介し
て蓄電池１５に電荷として充電される。ステップ２では
蓄電池１５の充電電圧値Ｖを充電電圧検出回路１６にて
検出する。次に、ステップ３では該充電電圧値Ｖと蓄電
池１５の最大許容電圧値ＶMAXの比較演算を制御回路１
７にて実行する。Ｖ＞ＶMAXと判別された場合はステッ
プ７へ進む。ステップ７ではスイッチング制御回路１３
及びスイッチ素子１２により全てのスイッチ素子１２を
切り離し、以降の蓄電池１５への充電動作を完全に停止
する。The operation of this embodiment having the above configuration will be described with reference to the flowchart of FIG. First, the light energy emitted from the light source in step 1 is photoelectrically converted by the plurality of solar cells 11 and charged in the storage battery 15 as an electric charge via the diode 14 for backflow prevention. In step 2, the charging voltage value V of the storage battery 15 is detected by the charging voltage detection circuit 16. Next, in step 3, the control circuit 1 compares the charging voltage value V with the maximum allowable voltage value V MAX of the storage battery 15.
Execute in 7. When it is determined that V> V MAX , the process proceeds to step 7. In step 7, the switching control circuit 13
And all the switch elements 12 are separated by the switch elements 12, and the subsequent charging operation to the storage battery 15 is completely stopped.
【００１０】一方、ステップ３で、ＶMAX＞Ｖと判別さ
れた場合はステップ４へ進む。ステップ４ではＶMAXと
Ｖとの電位差を制御回路１７が検知し、ステップ５であ
らかじめソフトウェアで設定した蓄電池１５と充電電圧
値との電位差と太陽電池１１の必要素子数の組合わせを
図３のテーブルの中から選択し、ステップ６で制御回路
１７からスイッチング制御回路１３に信号が送られ、ス
イッチ素子１２が太陽電池１１の素子群の接続を切り換
え、蓄電池１５に充電が行われる。次いで、ステップ８
において任意に時間設定可能なタイマーの作動で、ステ
ップ６からのシーケンスでは充電動作をスタートする一
方、ステップ７からのシーケンスでは充電動作を禁止し
て蓄電池１５は太陽電池１１の素子群と遮断された開放
状態を維持する。On the other hand, if it is determined in step 3 that V MAX > V, the process proceeds to step 4. In step 4, the control circuit 17 detects the potential difference between V MAX and V, and in step 5, the combination of the potential difference between the storage battery 15 and the charging voltage value set in advance by software and the required number of elements of the solar cell 11 is shown in FIG. A selection is made from the table, and in step 6, a signal is sent from the control circuit 17 to the switching control circuit 13, the switch element 12 switches the connection of the element group of the solar cell 11, and the storage battery 15 is charged. Then step 8
In the sequence from step 6, the charging operation is started by the operation of the timer capable of arbitrarily setting the time, while in the sequence from step 7, the charging operation is prohibited and the storage battery 15 is disconnected from the element group of the solar cell 11. Keep open.
【００１１】次に、前記タイマーをストップして、再び
ステップ１に戻り、前記フローチャートのシーケンスを
継続し実行する。以上のシーケンスを具備することで、
太陽電池の電源装置として蓄電池１５の充電電圧値Ｖを
蓄電池１５の最大許容電圧値ＶMAX以下に抑えるととも
に、簡単な回路構成で効率的な充電動作が可能となる。Next, the timer is stopped, the process returns to step 1 again, and the sequence of the flowchart is continued and executed. By having the above sequence,
As a power supply device for a solar cell, the charging voltage value V of the storage battery 15 can be suppressed to the maximum allowable voltage value V MAX of the storage battery 15 or less, and an efficient charging operation can be performed with a simple circuit configuration.
【００１２】[0012]
【発明の効果】本発明は、以上説明したように蓄電池の
端子電圧を検出する充電電圧検出回路と、該蓄電池の最
大許容電圧と端子電圧を比較しその電位差を検出して制
御するマイコン等の制御回路と、蓄電池の最大許容電圧
と該蓄電池の電圧差によって太陽電池素子の接続を切換
えるためのスイッチ素子とスイッチング制御回路とを備
えることにより、簡単な回路構成で蓄電池に対して過充
電防止が容易に可能になる効果がある。As described above, the present invention includes a charging voltage detection circuit for detecting the terminal voltage of a storage battery, a microcomputer for comparing the maximum allowable voltage of the storage battery with the terminal voltage, and detecting the potential difference between them for control. By providing a control circuit, a switching element for switching the connection of the solar cell elements depending on the maximum allowable voltage of the storage battery and the voltage difference of the storage battery, and a switching control circuit, overcharging of the storage battery can be prevented with a simple circuit configuration. There is an effect that is easily possible.
【図１】本発明に係る一実施例の太陽電池の電源装置の
ブロック回路図である。FIG. 1 is a block circuit diagram of a power supply device for a solar cell according to an embodiment of the present invention.
【図２】その動作を説明するフローチャートである。FIG. 2 is a flowchart explaining the operation.
【図３】蓄電池と充電電圧値との電位差に対する太陽電
池素子の必要素子数の組合わせテーブルである。FIG. 3 is a combination table of a required number of solar cell elements with respect to a potential difference between a storage battery and a charging voltage value.
【図４】第１の従来例の太陽電池の電源装置のブロック
回路図である。FIG. 4 is a block circuit diagram of a power supply device for a solar cell of a first conventional example.
【図５】第２の従来例の太陽電池の電源装置のブロック
回路図である。FIG. 5 is a block circuit diagram of a power supply device for a solar cell of a second conventional example.
１１・・太陽電池、１２・・スイッチ素子、１３・・ス
イッチング制御回路、１４・・逆流防止用ダイオード、
１５・・蓄電池、１６・・充電電圧検出回路、１７・・
マイコン等の制御回路、１８・・負荷。11 ... Solar cells, 12 ... Switch elements, 13 ... Switching control circuits, 14 ... Backflow prevention diodes,
15 ... Storage battery, 16 ... Charging voltage detection circuit, 17 ...
Control circuit such as microcomputer, 18, ... Load.
Claims (1)
子から得られた電力を蓄える蓄電池と、該蓄電池の端子
電圧を検出する充電電圧検出回路と、該蓄電池の最大許
容電圧と端子電圧を比較しその電位差を検出して制御す
るマイコン等の制御回路からなる太陽電池の電源装置に
おいて、該蓄電池の最大許容電圧と該蓄電池の電圧差に
よって太陽電池素子の接続を切換えるためのスイッチ素
子とスイッチング制御回路とを備えたことを特徴とする
太陽電池の電源装置。1. A plurality of solar cell elements, a storage battery that stores electric power obtained from the solar cell elements, a charging voltage detection circuit that detects a terminal voltage of the storage cell, a maximum allowable voltage and a terminal voltage of the storage cell. In the power supply device of the solar cell comprising a control circuit such as a microcomputer for comparing and controlling the potential difference, a switch element for switching the connection of the solar cell element by the maximum allowable voltage of the storage battery and the voltage difference of the storage battery A power supply device for a solar cell, comprising a switching control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5339182A JPH07163064A (en) | 1993-12-06 | 1993-12-06 | Power supply device for solar battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5339182A JPH07163064A (en) | 1993-12-06 | 1993-12-06 | Power supply device for solar battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07163064A true JPH07163064A (en) | 1995-06-23 |
Family
ID=18325019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5339182A Pending JPH07163064A (en) | 1993-12-06 | 1993-12-06 | Power supply device for solar battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07163064A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100879719B1 (en) * | 2006-11-03 | 2009-01-22 | (주)니츠개발 | Battery filling circuit according to voltage level |
| JP2010004042A (en) * | 2008-06-19 | 2010-01-07 | Macroblock Inc | Photovoltaic circuit |
| JP2013061606A (en) * | 2011-09-15 | 2013-04-04 | Konica Minolta Business Technologies Inc | Image formation device |
| CN105553093A (en) * | 2016-02-24 | 2016-05-04 | 台州谊聚机电有限公司 | Power supply circuit with real-time voltage detection for water pump system |
| CN105576805A (en) * | 2016-02-24 | 2016-05-11 | 台州谊聚机电有限公司 | Power circuit of water pump controller |
-
1993
- 1993-12-06 JP JP5339182A patent/JPH07163064A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100879719B1 (en) * | 2006-11-03 | 2009-01-22 | (주)니츠개발 | Battery filling circuit according to voltage level |
| JP2010004042A (en) * | 2008-06-19 | 2010-01-07 | Macroblock Inc | Photovoltaic circuit |
| JP2013061606A (en) * | 2011-09-15 | 2013-04-04 | Konica Minolta Business Technologies Inc | Image formation device |
| US9069552B2 (en) | 2011-09-15 | 2015-06-30 | Konica Minolta Business Technologies, Inc. | Image forming apparatus having plurality of power supplies to control power provided from a commercial power supply |
| CN105553093A (en) * | 2016-02-24 | 2016-05-04 | 台州谊聚机电有限公司 | Power supply circuit with real-time voltage detection for water pump system |
| CN105576805A (en) * | 2016-02-24 | 2016-05-11 | 台州谊聚机电有限公司 | Power circuit of water pump controller |
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