JPH07322529A - Solar cell power supply - Google Patents
Solar cell power supplyInfo
- Publication number
- JPH07322529A JPH07322529A JP6108024A JP10802494A JPH07322529A JP H07322529 A JPH07322529 A JP H07322529A JP 6108024 A JP6108024 A JP 6108024A JP 10802494 A JP10802494 A JP 10802494A JP H07322529 A JPH07322529 A JP H07322529A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- storage battery
- battery
- power supply
- solar cell
- 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.)
- Withdrawn
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
- Control Of Electrical Variables (AREA)
- Photovoltaic Devices (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は太陽電池電源装置に関
し、特に太陽電池を電源として蓄電池の充電を制御しつ
つ負荷へ電力を供給する太陽電池電源装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solar battery power supply device, and more particularly to a solar battery power supply device that supplies power to a load while controlling charging of a storage battery using a solar battery as a power supply.
【０００２】[0002]
【従来の技術】この種の太陽電池電源装置においては、
負荷が許容できる電圧変動の範囲が狭い場合、電圧変動
の大きな太陽電池出力を負荷に安定供給すべくスイッチ
ングレギュレータを用いることが行われている。2. Description of the Related Art In this type of solar cell power supply device,
When the range of voltage fluctuation that the load can tolerate is narrow, a switching regulator is used to stably supply the output of the solar cell with large voltage fluctuation to the load.
【０００３】図２にその一例を示し、特開昭６１−１１
０９１９，１１０９２０号公報に開示のものである。図
２において、１は太陽電池素子１ａを複数個直並列に接
続した太陽電池群，２は蓄電池，３は蓄電池２の端子間
電圧を検出する電圧センサー，４はスイッチングレギュ
レータである。このスイッチングレギュレータはスイッ
チングトランジスタ５とこのトランジスタ５をオンオフ
制御するＰＷＭ制御回路６とを有する。An example of this is shown in FIG.
This is disclosed in Japanese Patent Publication No. 0919,110920. In FIG. 2, 1 is a solar cell group in which a plurality of solar cell elements 1a are connected in series and parallel, 2 is a storage battery, 3 is a voltage sensor for detecting the terminal voltage of the storage battery 2, and 4 is a switching regulator. This switching regulator has a switching transistor 5 and a PWM control circuit 6 that controls on / off of the transistor 5.
【０００４】電圧センサー３は蓄電池２の端子間電圧を
検出しておき該端子間電圧が所定電圧以上であり蓄電池
２が負荷７を運転させるに十分な容量を有しているとき
スイッチングレギュレータ４を動作させ負荷７へ安定し
た電圧を供給するように構成されている。The voltage sensor 3 detects the voltage between the terminals of the storage battery 2, and when the voltage between the terminals is equal to or higher than a predetermined voltage and the storage battery 2 has a sufficient capacity to operate the load 7, the switching regulator 4 is activated. It is configured to operate and supply a stable voltage to the load 7.
【０００５】次に比較的負荷が許容できる電圧変動の範
囲が広い場合は、太陽電池出力の電圧を安定化せずスイ
ッチングトランジスタを連続的にオンまたはオフに固定
して蓄電池の充電制御を行っているのが一般的である。Next, if the range of voltage fluctuations that the load can tolerate is relatively wide, the charging voltage of the storage battery is controlled by continuously fixing the switching transistor on or off without stabilizing the voltage of the solar cell output. It is common to have
【０００６】図３にその一例を示し説明する。尚、図３
において図２と同等部分は同一符号により示す。図３に
おいて、１は太陽電池素子１ａを複数個直並列に接続し
た太陽電池群，２は蓄電池，３は蓄電池２の電圧を検出
する電圧センサー，５は蓄電池２の充電を制御するため
のスイッチングトランジスタである。An example will be described with reference to FIG. Incidentally, FIG.
2 are designated by the same reference numerals. In FIG. 3, 1 is a solar cell group in which a plurality of solar cell elements 1a are connected in series and parallel, 2 is a storage battery, 3 is a voltage sensor for detecting the voltage of the storage battery 2, and 5 is switching for controlling charging of the storage battery 2. It is a transistor.
【０００７】電圧センサー３は蓄電池２の端子間電圧を
検出しておき、日中、該端子間電圧が所定電圧以上にな
ったときスイッチングトランジスタ５を連続的にオフに
固定し蓄電池２を太陽電池群１から切離して過充電を防
止するように構成されている。The voltage sensor 3 detects the voltage across the terminals of the storage battery 2, and during the daytime, when the voltage between the terminals exceeds a predetermined voltage, the switching transistor 5 is continuously turned off to fix the storage battery 2 to the solar cell. It is separated from the group 1 to prevent overcharge.
【０００８】[0008]
【発明が解決しようとする課題】従来の図２のシステム
構成をとった場合、スイッチングレギュレータ４は負荷
７に対してのみ安定な電圧を供給するよう接続されてお
り、蓄電池２は直接、太陽電池群１に接続されているた
め、電圧の変動が大きく日中の天候によっては過充電と
なる可能性がある。蓄電池２にとってはこの状態が長時
間に渡って繰返されることは容量低下など蓄電池自体の
寿命に悪影響を及ぼす問題がある。In the case of the conventional system configuration of FIG. 2, the switching regulator 4 is connected so as to supply a stable voltage only to the load 7, and the storage battery 2 is directly connected to the solar cell. Since it is connected to the group 1, the voltage may fluctuate greatly and overcharge may occur depending on the daytime weather. For the storage battery 2, if this state is repeated for a long time, there is a problem that the life of the storage battery itself is adversely affected, such as a decrease in capacity.
【０００９】次に従来の図３のシステム構成をとった場
合、蓄電池２の電圧が所定電圧以上となったときにスイ
ッチングトランジスタ５が連続的にオフに固定され、太
陽の日照エネルギーが十分に得られるにもかかわらず、
この間、負荷７の電力供給は蓄電池２から行われ、この
状態が続いた後、蓄電池２の電圧が低下して所定電圧以
内に戻れば、スイッチングトランジスタ５は再び連続的
にオンに固定されるという動作が繰返される。この様な
動作では、太陽の日照エネルギーの有効利用が図れない
ばかりか、特にシール形の蓄電池を用いた太陽電池電池
システムにおいては、満充電に達しない可能性がある。Next, in the case of the conventional system configuration shown in FIG. 3, when the voltage of the storage battery 2 exceeds a predetermined voltage, the switching transistor 5 is continuously turned off, and the solar sunshine energy is sufficiently obtained. Despite being
During this period, the power supply to the load 7 is performed from the storage battery 2, and after this state continues, if the voltage of the storage battery 2 drops and returns to within a predetermined voltage, the switching transistor 5 is continuously fixed to ON again. The operation is repeated. With such an operation, not only the solar energy of the sun cannot be effectively utilized, but also in a solar battery cell system using a seal type storage battery, there is a possibility that the battery is not fully charged.
【００１０】本発明の目的は、蓄電池を効率的に充電し
てより信頼性の高い蓄電池電源装置を提供することであ
る。An object of the present invention is to provide a storage battery power supply device that charges a storage battery efficiently and has higher reliability.
【００１１】[0011]
【課題を解決するための手段】本発明による蓄電池電源
装置は、太陽電池と、蓄電池と、前記太陽電池の発生電
圧を前記蓄電池へ供給制御するスイッチング電源と、前
記蓄電池の端子間電圧が所定値を越えたときに前記スイ
ッチング電源のスイッチング素子のオンオフ制御を行い
前記所定値以内になったときに前記スイッチング素子を
常時オン制御する制御手段とを含むことを特徴としてい
る。A storage battery power supply device according to the present invention comprises a solar battery, a storage battery, a switching power supply for controlling the generated voltage of the solar battery to the storage battery, and a terminal voltage of the storage battery having a predetermined value. Control means for ON / OFF control of the switching element of the switching power supply when it exceeds the predetermined value, and for always ON control of the switching element when it is within the predetermined value.
【００１２】[0012]
【作用】太陽電池の発生電圧をスイッチング電源を介し
て蓄電池へ供給する様にし、蓄電池の電圧が十分な場合
には、スイッチング電源をＰＷＭ（パルス幅変調）制御
するようにして安定電圧で充電を維持し、蓄電池の電圧
が十分でない場合には、スイッチング電源のスイッチン
グトランジスタをオンに維持して充電を行うようにした
ものである。[Function] The generated voltage of the solar cell is supplied to the storage battery via the switching power supply, and when the voltage of the storage battery is sufficient, the switching power supply is controlled by PWM (pulse width modulation) to perform charging with a stable voltage. When the voltage of the storage battery is maintained and the voltage of the storage battery is not sufficient, the switching transistor of the switching power supply is kept on to perform charging.
【００１３】[0013]
【実施例】以下に本発明の実施例を図面に従って説明す
る。Embodiments of the present invention will be described below with reference to the drawings.
【００１４】図１は本発明の実施例である太陽電池電源
装置の構成を示すブロック図であり、図２，３と同等部
分は同一符号にて示している。同図において、１は太陽
電池素子１ａを複数個直並列に接続した太陽電池群，２
は蓄電池，３は蓄電池２の端子間電圧を検出する電圧セ
ンサー，４はスイッチングトランジスタ５及びこのスイ
ッチングトランジスタの動作を制御する制御回路６を有
するスイッチングレギュレータ，７は負荷，８は蓄電池
２が所定電圧以下になったとき電圧センサー３の検出に
より負荷７を蓄電池２から切離すリレースイッチであ
る。FIG. 1 is a block diagram showing the structure of a solar cell power supply device according to an embodiment of the present invention, and the same parts as those in FIGS. In the figure, 1 is a solar cell group in which a plurality of solar cell elements 1a are connected in series and parallel, 2
Is a storage battery, 3 is a voltage sensor for detecting a voltage across terminals of the storage battery 2, 4 is a switching regulator having a switching transistor 5 and a control circuit 6 for controlling the operation of the switching transistor, 7 is a load, 8 is a predetermined voltage of the storage battery 2. It is a relay switch that disconnects the load 7 from the storage battery 2 by the detection of the voltage sensor 3 when the following occurs.
【００１５】上記の如く構成された太陽電池電源装置に
おいて、蓄電池２の端子間電圧は常に電圧センサー３に
より検出されており、日中、所定電圧以内にあるときは
スイッチングトランジスタ５は連続してオンに固定され
蓄電池２を充電しながら負荷へも電力を供給している。In the solar battery power supply device configured as described above, the voltage between the terminals of the storage battery 2 is always detected by the voltage sensor 3, and the switching transistor 5 is continuously turned on when it is within a predetermined voltage during the day. The storage battery 2 is fixed to and the power is also supplied to the load.
【００１６】ここで接続されている負荷７とは比較的許
容できる電圧変動の範囲が広い負荷であるものとする。It is assumed that the connected load 7 is a load having a relatively wide range of allowable voltage fluctuation.
【００１７】蓄電池２の電圧が所定電圧以上になったと
き、電圧センサー３からの指令が制御回路６に伝達され
たスイッチングトランジスタ５はＰＷＭ制御に切替わ
り、スイッチングレギュレータ７として動作することに
より蓄電池２は低電圧による充電が行われる。この間、
スイッチングトランジスタ５は制御回路６により制御さ
れスイッチング動作をして電圧を安定化させるように働
く。When the voltage of the storage battery 2 exceeds a predetermined voltage, the switching transistor 5 to which the command from the voltage sensor 3 is transmitted to the control circuit 6 is switched to PWM control and operates as the switching regulator 7 to operate as the storage battery 2 Is charged by low voltage. During this time,
The switching transistor 5 is controlled by the control circuit 6 and performs a switching operation to stabilize the voltage.
【００１８】また、蓄電池２の電圧が所定以内に戻った
ときはスイッチングトランジスタ５は再び連続的にオン
に固定されるよう動作する。この結果、蓄電池２は過充
電が防止され、太陽電池群１は継続して負荷にも電圧を
供給するのでより効率的な充電が行われる。Further, when the voltage of the storage battery 2 returns within a predetermined value, the switching transistor 5 operates so as to be continuously turned on again. As a result, the storage battery 2 is prevented from being overcharged, and the solar cell group 1 continuously supplies voltage to the load as well, so that more efficient charging is performed.
【００１９】一方、過放電になった場合の蓄電池２の保
護は、蓄電池２の電圧が所定電圧以下となっときに電圧
センサー３の検出により負荷７を蓄電池２から切離すこ
とで、従来通りの機能を供えている。On the other hand, the protection of the storage battery 2 in the case of over-discharge is as usual by disconnecting the load 7 from the storage battery 2 by the detection of the voltage sensor 3 when the voltage of the storage battery 2 becomes a predetermined voltage or less. It has a function.
【００２０】なお、上記実施例において電圧センサー内
にタイマー回路を設けることにより蓄電池電圧を検出し
てから所定時間を経過した後に指令を伝達することで、
システム構築に幅をもたせることができ、蓄電池の特性
に合わせて電圧の検出レベルと共に予め最適なポイント
に設定すればシステムとしての信頼性も一層向上する。By providing a timer circuit in the voltage sensor in the above embodiment, the command is transmitted after a predetermined time has elapsed from the detection of the storage battery voltage,
The system can be constructed in a wide range, and the reliability of the system is further improved by setting the voltage detection level and the optimum point in advance according to the characteristics of the storage battery.
【００２１】また、上記実施例では、比較的許容できる
電圧変動の範囲が広い負荷を接続した場合で説明した
が、本発明では、許容できる電圧変動の範囲が狭い限ら
れた負荷が接続される場合は、負荷容量に合わせ各種レ
ギュレータを負荷回路に接続して安定した電圧を供給す
るように構成したシステムといても用いることがでる。Further, in the above embodiment, the case where the load having a relatively wide allowable voltage fluctuation range is connected has been described. However, in the present invention, a limited load having a narrow allowable voltage fluctuation range is connected. In this case, it can be used as a system in which various regulators are connected to the load circuit according to the load capacity to supply a stable voltage.
【００２２】[0022]
【発明の効果】以上説明したように本発明によれば、日
中、蓄電池の電圧上昇を検出し連続的にオンに固定され
ているスイッチングトランジスタをＰＷＭ制御に切替え
ることにより、蓄電池の過充電を防止し定電圧による充
電を行うよう動作するため、太陽電池群は継続して負荷
にも電力を供給することができ、従来の構成に比べ太陽
の日照エネルギーの有効利用が図れるという効果があ
る。これにより、蓄電池はより効率的に充電されるの
で、容量不足によってシステム断となる確率が低減され
太陽電池システムの信頼性が向上する。As described above, according to the present invention, the overcharge of the storage battery is prevented by detecting the voltage rise of the storage battery during the day and switching the switching transistor which is continuously fixed to ON to the PWM control. Since it operates so as to prevent and charge by a constant voltage, the solar cell group can continuously supply electric power to the load, and has an effect that the solar sunshine energy can be effectively used as compared with the conventional configuration. As a result, the storage battery is charged more efficiently, so that the probability of system disconnection due to insufficient capacity is reduced, and the reliability of the solar cell system is improved.
【図１】本発明の実施例のブロック図である。FIG. 1 is a block diagram of an embodiment of the present invention.
【図２】従来の太陽電池電源装置の一例を示すブロック
図である。FIG. 2 is a block diagram showing an example of a conventional solar cell power supply device.
【図３】従来の太陽電池電源装置の他の例を示すブロッ
ク図である。FIG. 3 is a block diagram showing another example of a conventional solar cell power supply device.
１ 太陽電池群 ２ 蓄電池 ３ 電圧センサー ４ スイッチング電源 ５ スイッチングトランジスタ ６ ＰＷＭ制御回路 ７ 負荷 ８ リレースイッチ 1 Solar Cell Group 2 Storage Battery 3 Voltage Sensor 4 Switching Power Supply 5 Switching Transistor 6 PWM Control Circuit 7 Load 8 Relay Switch
Claims (3)
発生電圧を前記蓄電池へ供給制御するスイッチング電源
と、前記蓄電池の端子間電圧が所定値を越えたときに前
記スイッチング電源のスイッチング素子のオンオフ制御
を行い前記所定値以内になったときに前記スイッチング
素子を常時オン制御する制御手段とを含むことを特徴と
する太陽電池電源装置。1. A solar cell, a storage battery, a switching power supply for controlling supply of a generated voltage of the solar cell to the storage battery, and a switching element of the switching power supply when a terminal voltage of the storage battery exceeds a predetermined value. A solar cell power supply device comprising: a control unit that performs on / off control and always controls the switching element to be on when the value is within the predetermined value.
りも小なる値に低下したとき前記蓄電池を負荷から切離
す手段を更に含むことを特徴とする請求項１記載の太陽
電池電源装置。2. The solar cell power supply device according to claim 1, further comprising means for disconnecting the storage battery from the load when the terminal voltage of the storage battery drops to a value smaller than the predetermined value.
圧を検出する手段と、この検出電圧が所定値を越えたと
きにこの検出電圧に応じてスイッチング素子のオンオフ
制御を行うよう構成されていることを特徴とする請求項
１または２記載の太陽電池電源装置。3. The control means is configured to detect a terminal voltage of the storage battery and to perform on / off control of a switching element according to the detected voltage when the detected voltage exceeds a predetermined value. The solar cell power supply device according to claim 1 or 2, wherein
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6108024A JPH07322529A (en) | 1994-05-23 | 1994-05-23 | Solar cell power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6108024A JPH07322529A (en) | 1994-05-23 | 1994-05-23 | Solar cell power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07322529A true JPH07322529A (en) | 1995-12-08 |
Family
ID=14474043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6108024A Withdrawn JPH07322529A (en) | 1994-05-23 | 1994-05-23 | Solar cell power supply |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07322529A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11332091A (en) * | 1998-01-28 | 1999-11-30 | Seiko Instruments Inc | Electronic equipment |
| JPH11341701A (en) * | 1998-05-21 | 1999-12-10 | Sanyo Denki Co Ltd | Portable solar generator |
| JP2004336974A (en) * | 2003-05-12 | 2004-11-25 | Origin Electric Co Ltd | Power supply |
| CN102411075A (en) * | 2011-11-29 | 2012-04-11 | 宁波高新区新诚电子有限公司 | Solar photovoltaic cell simulation system and simulation method for same |
| JP2014121197A (en) * | 2012-12-18 | 2014-06-30 | Kyushu Electric Power Co Inc | Charge control apparatus |
| JP2018102095A (en) * | 2016-12-21 | 2018-06-28 | ゴイク電池株式会社 | Solar power charging device and charging method |
| CN113708721A (en) * | 2016-04-05 | 2021-11-26 | 太阳能安吉科技有限公司 | Safety switch for photovoltaic system |
| US11979037B2 (en) | 2012-01-11 | 2024-05-07 | Solaredge Technologies Ltd. | Photovoltaic module |
-
1994
- 1994-05-23 JP JP6108024A patent/JPH07322529A/en not_active Withdrawn
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11332091A (en) * | 1998-01-28 | 1999-11-30 | Seiko Instruments Inc | Electronic equipment |
| JPH11341701A (en) * | 1998-05-21 | 1999-12-10 | Sanyo Denki Co Ltd | Portable solar generator |
| JP2004336974A (en) * | 2003-05-12 | 2004-11-25 | Origin Electric Co Ltd | Power supply |
| CN102411075A (en) * | 2011-11-29 | 2012-04-11 | 宁波高新区新诚电子有限公司 | Solar photovoltaic cell simulation system and simulation method for same |
| US11979037B2 (en) | 2012-01-11 | 2024-05-07 | Solaredge Technologies Ltd. | Photovoltaic module |
| JP2014121197A (en) * | 2012-12-18 | 2014-06-30 | Kyushu Electric Power Co Inc | Charge control apparatus |
| CN113708721A (en) * | 2016-04-05 | 2021-11-26 | 太阳能安吉科技有限公司 | Safety switch for photovoltaic system |
| JP2018102095A (en) * | 2016-12-21 | 2018-06-28 | ゴイク電池株式会社 | Solar power charging device and charging method |
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Legal Events
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| A300 | Application deemed to be withdrawn because no request for examination was validly filed |
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