JPH05219661A - Solar battery circuit - Google Patents
Solar battery circuitInfo
- Publication number
- JPH05219661A JPH05219661A JP4042387A JP4238792A JPH05219661A JP H05219661 A JPH05219661 A JP H05219661A JP 4042387 A JP4042387 A JP 4042387A JP 4238792 A JP4238792 A JP 4238792A JP H05219661 A JPH05219661 A JP H05219661A
- Authority
- JP
- Japan
- Prior art keywords
- charging
- circuit
- battery
- solar
- circuits
- 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
- 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、人工衛星等に搭載する
太陽電池回路に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solar cell circuit mounted on an artificial satellite or the like.
【０００２】[0002]
【従来の技術】従来、この種の太陽電池回路は、図２に
示すように、主太陽電池回路１と、主太陽電池回路１の
電位的上位に位置されたブロッキングダイオード１０を
介して主太陽電池回路１に接続されたバッテリ充電用太
陽電池回路４０とにより構成されている。この構成にお
いて、主太陽電池回路１の出力電圧に対しては、通常の
場合、上限電圧制御が行なわれており、主出力３にはＶ
BUS （Ｖ）の電圧が出力されるようになっている。2. Description of the Related Art Conventionally, as shown in FIG. 2, a solar cell circuit of this type has a main solar cell circuit 1 and a main solar cell circuit 1 and a blocking diode 10 positioned at a potential higher position than the main solar cell circuit 1. The battery charging solar cell circuit 40 is connected to the battery circuit 1. In this configuration, with respect to the output voltage of the main solar cell circuit 1, the upper limit voltage control is normally performed, and the main output 3 has V
The BUS (V) voltage is output.
【０００３】また、バッテリ充電用太陽電池回路４０
は、図示しないバッテリの充電に必要な数だけ直並列接
続された複数の太陽電池セル１００により形成されてい
る。そして、バッテリ充電用太陽電池回路４０の充電回
路出力３０にバッテリが直接接続されており、このた
め、バッテリ充電用太陽電池回路４０の上部側電圧がバ
ッテリ電圧ＶBAT （Ｖ）に、下部側電圧がＶBUS （Ｖ）
になる。通常はバッテリ電圧ＶBAT がＶBUS よりも低く
なるように設定されており、このため、バッテリ充電用
太陽電池回路４０の太陽電池セル１００には逆電圧（Ｖ
BUS −ＶBAT ）が印加されることになる。ここで、太陽
電池セル１００は、光照射時に図３の曲線ａで示す特性
を有するので、その動作点は図３Ａ点となる。したがっ
て、バッテリ充電用太陽電池回路４０によるバッテリへ
の充電電流は、太陽電池セル１００の特性と並列数によ
って決定される定電流となる。Further, a solar cell circuit 40 for charging a battery
Is formed by a plurality of solar cells 100 connected in series and parallel by the number required for charging a battery (not shown). The battery is directly connected to the charging circuit output 30 of the battery charging solar cell circuit 40. Therefore, the upper side voltage of the battery charging solar cell circuit 40 becomes the battery voltage V BAT (V) and the lower side voltage. Is V BUS (V)
become. Normally, the battery voltage V BAT is set to be lower than V BUS . Therefore, the reverse voltage (V is applied to the solar battery cell 100 of the battery charging solar battery circuit 40).
BUS- V BAT ) will be applied. Here, since the solar battery cell 100 has the characteristics shown by the curve a in FIG. 3 during light irradiation, its operating point is the point in FIG. 3A. Therefore, the charging current to the battery by the solar battery circuit 40 for charging the battery is a constant current determined by the characteristics of the solar battery cells 100 and the parallel number.
【０００４】[0004]
【発明が解決しようとする課題】上述した従来の太陽電
池回路では、バッテリ充電用太陽電池回路４０におい
て、電圧ＶBUS とＶBAT との差が太陽電池セル１２の逆
耐電圧よりも大きい場合には、太陽電池セル１００の直
列数を増加させて分圧することにより、回路４０の逆耐
電圧を高めることができる。しかし、電圧ＶBUS とＶ
BAT との差が太陽電池セル１００の逆耐電圧よりも大き
く、しかもバッテリ充電用太陽電池回路４０内の太陽電
池セル１００の一部が影になった場合には、逆耐電圧以
上の電圧太陽電池セル１００に印加されることになり、
バッテリ充電用太陽電池回路４０の太陽電池セル１００
が電気的に破壊される可能性がある。In the conventional solar battery circuit described above, when the difference between the voltages V BUS and V BAT in the battery charging solar battery circuit 40 is larger than the reverse withstand voltage of the solar battery cell 12. Can increase the reverse withstand voltage of the circuit 40 by increasing the number of solar cells 100 in series and dividing the voltage. However, the voltages V BUS and V
When the difference from the BAT is larger than the reverse withstand voltage of the solar battery cell 100 and a part of the solar battery cell 100 in the battery charging solar battery circuit 40 is shaded, the voltage of the solar battery with the reverse withstand voltage or more is exceeded. Will be applied to the battery cell 100,
Solar cell 100 of solar cell circuit 40 for battery charging
May be electrically destroyed.
【０００５】本発明は上述した問題点を解決するために
なされたもので、主太陽電池回路の主出力電圧とバッテ
リ充電用太陽電池回路の出力電圧との差がバッテリ充電
用太陽電池回路の太陽電池セルの逆耐電圧を超え、しか
も太陽電池セルの全部又は一部が影になった場合におい
ても、バッテリ充電用太陽電池回路の太陽電池セルが電
気的に破壊することのない太陽電池回路を提供すること
を目的とする。The present invention has been made to solve the above-mentioned problems, and the difference between the main output voltage of the main solar cell circuit and the output voltage of the battery charging solar cell circuit is the solar of the battery charging solar cell circuit. Even if the reverse withstand voltage of the battery cells is exceeded, and even if all or part of the solar cells are shaded, a solar cell circuit that prevents the solar cells of the battery charging solar cell circuit from being electrically destroyed The purpose is to provide.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成するため
に本発明は、直並列に接続された複数の太陽電池セルに
よって所定の電圧を出力する主太陽電池回路と、上記主
太陽電池回路とバッテリとの間に直列接続され、直並列
接続された複数の太陽電池セルによって所定の電圧を出
力するバッテリ充電用太陽電池回路とを有する太陽電池
回路において、上記バッテリ充電用太陽電池回路は、直
列に接続され、各々が直並列接続の複数の太陽電池セル
で形成された第１及び第２の充電用回路と、上記主太陽
電池回路の出力電圧をバッテリ充電用太陽電池回路の出
力電圧との差が太陽電池セルの逆耐電圧以上になりかつ
第１、第２の充電用回路の太陽電池セルが影になってい
るときに、第１、第２の充電用回路に入力する充電電流
を迂回させるバイパス用の第１及び第２の保護回路と、
上記第１及び第２の保護回路間を通る上記充電電流の逆
流を防止するための逆流防止回路とよりなる構成として
ある。To achieve the above object, the present invention provides a main solar cell circuit for outputting a predetermined voltage by a plurality of solar cells connected in series and parallel, and the main solar cell circuit. In a solar battery circuit that is connected in series with a battery, and a solar battery circuit for battery charging that outputs a predetermined voltage by a plurality of solar cells that are connected in series and parallel, the solar battery circuit for battery charging is serial. Of the first and second charging circuits each of which is formed of a plurality of solar cells connected in series and parallel, and the output voltage of the main solar cell circuit is the output voltage of the battery charging solar cell circuit. When the difference is equal to or higher than the reverse withstand voltage of the solar battery cell and the solar battery cells of the first and second charging circuits are shaded, the charging current input to the first and second charging circuits is changed. Bypass A first and second protective circuit for scan,
A backflow prevention circuit is provided for preventing a backflow of the charging current passing between the first and second protection circuits.
【０００７】また、好ましくは、上記第１及び第２の保
護回路を、同方向に直列接続された複数のダイオードを
上記第１及び第２の充電用回路に各々並列接続すること
により形成し、上記逆流防止回路を、上記複数のダイオ
ードとは逆向きのダイオードを上記第１及び第２の保護
回路間でかつ上記第１及び第２の充電用回路間に配設し
て形成した構成としてある。Preferably, the first and second protection circuits are formed by connecting a plurality of diodes connected in series in the same direction in parallel to the first and second charging circuits, respectively. The backflow prevention circuit is formed by disposing diodes opposite to the plurality of diodes between the first and second protection circuits and between the first and second charging circuits. ..
【０００８】[0008]
【作用】上記構成によれば、主太陽電池回路の出力電圧
とバッテリ充電用太陽電池回路の出力電圧との差が太陽
電池セルの逆耐電圧以上になり、しかも第１の充電用回
路の全部又は一部が影になったときには、充電電流は第
２の充電用回路で電流制限された後、第１の保護回路を
通り、出力される。逆に、第２の充電用回路の全部又は
一部が影になったときには、充電電流は第２の保護回路
を通り、第１の充電用回路で電流制限されて出力され
る。また、第１及び第２の充電用回路の全部又は一部が
影になったときには、充電電流は第１及び第２の保護回
路の間の逆流防止回路によって遮断されるので、出力さ
れることはない。According to the above structure, the difference between the output voltage of the main solar cell circuit and the output voltage of the battery charging solar cell circuit becomes equal to or greater than the reverse withstand voltage of the solar cell, and moreover, the entire first charging circuit is provided. Alternatively, when part of the charge is shaded, the charge current is limited by the second charging circuit and then output through the first protection circuit. On the contrary, when all or part of the second charging circuit is shaded, the charging current passes through the second protection circuit and is limited in current by the first charging circuit before being output. In addition, when all or part of the first and second charging circuits are shaded, the charging current is cut off by the backflow prevention circuit between the first and second protection circuits, and therefore output. There is no.
【０００９】[0009]
【実施例】以下、本発明の一実施例について図面を参照
して説明する。図１は本実施例の太陽電池回路を示す回
路図である。１は主太陽電池回路であり、グランド２と
主出力３との間の電圧に対しては、通常の場合、上限電
圧制御がされ、主出力３からＶBUS （Ｖ）の電圧が出力
される。２０はバッテリ充電用太陽電池回路であり、主
太陽電池回路１よりも電位的上位に位置されたブロッキ
ングダイオード１０を介して主太陽電池回路１に接続さ
れている。バッテリ充電用回路２０において、２１，２
２は太陽電池セル１００の逆耐電圧を考慮して、主出力
３と充電回路出力３０との間で２分割された充電用回路
であり、逆流防止ダイオード２５を介して直列に接続さ
れている。各充電用回路２１，２２において、直並列接
続された太陽電池セル１００の総数は充電回路出力３０
に接続される図示しないバッテリを充電することができ
る数に設定されており、このため充電回路出力３０の電
圧はバッテリ電圧ＶBAT （Ｖ）となる。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a circuit diagram showing a solar cell circuit of this embodiment. Reference numeral 1 is a main solar cell circuit, which normally controls the upper limit voltage for the voltage between the ground 2 and the main output 3, and outputs a voltage of V BUS (V) from the main output 3. .. Reference numeral 20 denotes a battery charging solar cell circuit, which is connected to the main solar cell circuit 1 via a blocking diode 10 which is positioned higher in potential than the main solar cell circuit 1. In the battery charging circuit 20, 21, 21,
A charging circuit 2 is divided into two between the main output 3 and the charging circuit output 30 in consideration of the reverse withstand voltage of the solar battery cell 100, and is connected in series via the backflow prevention diode 25. .. In each of the charging circuits 21 and 22, the total number of the solar cells 100 connected in series and parallel is the charging circuit output 30.
It is set to a number capable of charging a battery (not shown) connected to the battery, so that the voltage of the charging circuit output 30 becomes the battery voltage V BAT (V).
【００１０】２３，２４は充電電流を充電回路出力３０
側にだけ通す電流バイパス用ダイオードであり、電流バ
イパス用ダイオード２３は充電用回路２１及び逆流防止
用ダイオード２５に並列に接続され、電流バイパス用ダ
イオード２４は逆流防止用ダイオード２５及び充電回路
２２に並列接続されている。これら電流バイパス用ダイ
オード２３，２４は直列接続された複数のダイオードで
構成されており、ダイオードの数は、主出力３と充電回
路出力３０との間の最大電位差と太陽電池セル１００の
逆耐電圧によって決定される。Numerals 23 and 24 indicate the charging current and the charging circuit output 30.
The current bypass diode 23 is connected only in parallel with the charging circuit 21 and the backflow prevention diode 25, and the current bypass diode 24 is connected in parallel with the backflow prevention diode 25 and the charging circuit 22. It is connected. These current bypass diodes 23, 24 are composed of a plurality of diodes connected in series. The number of diodes is the maximum potential difference between the main output 3 and the charging circuit output 30 and the reverse withstand voltage of the solar cell 100. Determined by
【００１１】次に、本実施例の動作について説明する。
電圧ＶBUS とＶBAT との電位差が太陽電池セル１００の
逆耐電圧よりも大きく、しかも充電用回路２１の全部又
は一部が影になった場合には、充電電流は充電用回路２
２で電流制限された後、電流バイパス用ダイオード２３
を通って充電回路出力３０に出力される。したがって、
影になった充電用回路２１の太陽電池セル１００に逆耐
電圧以上の電圧は印加されないので、電気的に破壊され
ることはない。Next, the operation of this embodiment will be described.
When the potential difference between the voltages V BUS and V BAT is larger than the reverse withstand voltage of the solar battery cell 100 and all or part of the charging circuit 21 is shaded, the charging current is the charging circuit 2.
After the current is limited by 2, the current bypass diode 23
Is output to the charging circuit output 30. Therefore,
Since the voltage higher than the reverse withstand voltage is not applied to the shaded solar cell 100 of the charging circuit 21, it is not electrically damaged.
【００１２】また、電圧ＶBUS とＶBAT との電位差が太
陽電池セル１００の逆耐電圧よりも大きく、しかも充電
用回路２２の全部又は一部が影になった場合には、充電
電流は電流バイパス用ダイオード２４を通り、充電用回
路２１で電流制限されて充電回路出力３０に出力され
る。したがって、この場合にも影になって充電用回路２
２が電気的に破壊されることはない。さらに、充電用回
路２１，２２の両方が影になった場合には、充電電流は
電流バイパス用ダイオード２４を通るが、以後は逆流防
止用ダイオード２５でブロックされるので、充電回路３
０には出力されない。If the potential difference between the voltages V BUS and V BAT is larger than the reverse withstand voltage of the solar cell 100 and all or part of the charging circuit 22 is shaded, the charging current is the current. The current passes through the bypass diode 24, is current limited by the charging circuit 21, and is output to the charging circuit output 30. Therefore, even in this case, the charging circuit 2 is shaded.
2 is not electrically destroyed. Furthermore, when both the charging circuits 21 and 22 are shaded, the charging current passes through the current bypass diode 24, but is blocked by the backflow prevention diode 25 thereafter, so the charging circuit 3
It is not output to 0.
【００１３】[0013]
【発明の効果】以上説明したように本発明は、影になっ
ている第１又は（及び）第２の充電用回路に充電電流が
流れ込まないので、主太陽電池回路の出力電圧とバッテ
リ充電用太陽電池回路の出力電圧との差が太陽電池セル
の逆耐電圧以上になり、かつ第１又は（及び）第２の充
電用回路の太陽電池セルが影になっている場合であって
も、太陽電池セルが電気的に破壊されることはなく、そ
の結果、製品の信頼性の向上を図ることができるという
効果がある。As described above, according to the present invention, since the charging current does not flow into the shaded first or / and second charging circuit, the output voltage of the main solar cell circuit and the battery charging Even when the difference from the output voltage of the solar battery circuit is equal to or higher than the reverse withstand voltage of the solar battery cell and the solar battery cell of the first or (and) second charging circuit is shaded, The solar cell is not electrically damaged, and as a result, the product reliability can be improved.
【図１】本発明の一実施例に係る太陽電池回路を示す回
路図である。FIG. 1 is a circuit diagram showing a solar cell circuit according to an embodiment of the present invention.
【図２】従来の太陽電池回路を示す回路図である。FIG. 2 is a circuit diagram showing a conventional solar cell circuit.
【図３】太陽電池セルの動作特性図である。FIG. 3 is an operating characteristic diagram of a solar cell.
１…主太陽電池回路 ２０…バッテリ充電用太陽電池回路 ２１，２２…充電用回路 ２３，２４…電流バイパス用ダイオード ２５…逆流防止用ダイオード １００…太陽電池セル DESCRIPTION OF SYMBOLS 1 ... Main solar cell circuit 20 ... Solar cell circuit for battery charging 21,22 ... Circuit for charging 23, 24 ... Diode for current bypass 25 ... Diode for backflow prevention 100 ... Solar cell
Claims (2)
によって所定の電圧を出力する主太陽電池回路と、 上記主太陽電池回路とバッテリとの間に直列接続され、
直並列接続された複数の太陽電池セルによって所定の電
圧を出力するバッテリ充電用太陽電池回路とを有する太
陽電池回路において、 上記バッテリ充電用太陽電池回路は、 直列に接続され、各々が直並列接続の複数の太陽電池セ
ルで形成された第１及び第２の充電用回路と、 上記主太陽電池回路の出力電圧を、バッテリ充電用太陽
電池回路の出力電圧との差が太陽電池セルの逆耐電圧以
上になり、かつ第１、第２の充電用回路の太陽電池セル
が影になっているときに、第１、第２の充電用回路に入
力する充電電流を迂回させるバイパス用の第１及び第２
の保護回路と、 上記第１及び第２の保護回路間を通る上記充電電流の逆
流を防止するための逆流防止回路とよりなることを特徴
とする太陽電池回路。1. A main solar cell circuit that outputs a predetermined voltage by a plurality of solar cells connected in series and parallel, and a main solar cell circuit and a battery connected in series,
In a solar battery circuit having a battery charging solar battery circuit that outputs a predetermined voltage by a plurality of solar battery cells connected in series / parallel, the battery charging solar battery circuits are connected in series, and each is connected in series / parallel. The first and second charging circuits formed of a plurality of solar cells and the difference between the output voltage of the main solar cell circuit and the output voltage of the battery charging solar cell circuit is the reverse resistance of the solar cell. When the voltage is equal to or higher than the voltage and the solar cells of the first and second charging circuits are in shadow, the first bypassing bypasses the charging current input to the first and second charging circuits. And the second
And a backflow prevention circuit for preventing backflow of the charging current passing between the first and second protection circuits.
に直列接続された複数のダイオードを上記第１及び第２
の充電用回路に各々並列接続することにより形成し、 上記逆流防止回路を、上記複数のダイオードとは逆向き
のダイオードを上記第１及び第２の保護回路間で、かつ
上記第１及び第２の充電用回路間に配設して形成したこ
とを特徴とする請求項１記載の太陽電池回路。2. The first and second protection circuits are provided with a plurality of diodes connected in series in the same direction as the first and second protection circuits.
Are connected in parallel to each of the charging circuits, and the backflow prevention circuit includes a diode in a direction opposite to the plurality of diodes between the first and second protection circuits, and the first and second protection circuits. The solar cell circuit according to claim 1, wherein the solar cell circuit is formed by being arranged between the charging circuits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4042387A JPH05219661A (en) | 1992-01-31 | 1992-01-31 | Solar battery circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4042387A JPH05219661A (en) | 1992-01-31 | 1992-01-31 | Solar battery circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05219661A true JPH05219661A (en) | 1993-08-27 |
Family
ID=12634660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4042387A Pending JPH05219661A (en) | 1992-01-31 | 1992-01-31 | Solar battery circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05219661A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013093365A (en) * | 2011-10-24 | 2013-05-16 | Shark Solar Energy Co Ltd | Photovoltaic power generating system |
| WO2013163822A1 (en) * | 2012-05-03 | 2013-11-07 | 友达光电股份有限公司 | Solar power system, solar power module and power supply method |
| CN106712698A (en) * | 2017-03-01 | 2017-05-24 | 北京天恒长鹰科技股份有限公司 | Multi-stage hybrid solar cell array and combined power supply method thereof |
-
1992
- 1992-01-31 JP JP4042387A patent/JPH05219661A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013093365A (en) * | 2011-10-24 | 2013-05-16 | Shark Solar Energy Co Ltd | Photovoltaic power generating system |
| WO2013163822A1 (en) * | 2012-05-03 | 2013-11-07 | 友达光电股份有限公司 | Solar power system, solar power module and power supply method |
| CN106712698A (en) * | 2017-03-01 | 2017-05-24 | 北京天恒长鹰科技股份有限公司 | Multi-stage hybrid solar cell array and combined power supply method thereof |
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