JPH03203530A - Charge control system for solar generator unit - Google Patents
Charge control system for solar generator unitInfo
- Publication number
- JPH03203530A JPH03203530A JP1343684A JP34368489A JPH03203530A JP H03203530 A JPH03203530 A JP H03203530A JP 1343684 A JP1343684 A JP 1343684A JP 34368489 A JP34368489 A JP 34368489A JP H03203530 A JPH03203530 A JP H03203530A
- Authority
- JP
- Japan
- Prior art keywords
- storage battery
- circuit
- voltage
- charging
- switching element
- 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
- 238000001514 detection method Methods 0.000 claims description 16
- 238000010248 power generation Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 7
- 238000004880 explosion Methods 0.000 abstract description 2
- 238000004904 shortening Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
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)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は太陽光発電装置における充電制御方式の改良に
関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in a charging control method in a solar power generation device.
（従来の技術）
従来の太陽光発電装置における充電制御回路を第２図に
示す、第２図において、２１は太陽電池、２２は太陽電
池の起電力を蓄電する蓄電池、２３は太陽電池２１又は
蓄電池２２によって駆動される負荷、２４は蓄電池の端
子電圧を検出する蓄電池電圧検出回路、２５は太陽電池
の起電力を短絡させるシャント回路である。(Prior Art) A charging control circuit in a conventional solar power generation device is shown in FIG. A load is driven by the storage battery 22, 24 is a storage battery voltage detection circuit that detects the terminal voltage of the storage battery, and 25 is a shunt circuit that short-circuits the electromotive force of the solar cell.
この充電制御回路では、太陽電池２１の起電力を蓄電池
２２に充電すると共に、蓄電池２２の端子電圧を蓄電池
電圧検出回路２４で検出して蓄電池２２の端子電圧が所
定値以上になったときに、シャント回路２５のスイッチ
ング素子２５ａをオンして太陽電池２２の起電力をシャ
ント回路２５で短絡させることによって、蓄電池２２が
充電されるのを防止し、もって蓄電池２２の過充電を防
止しようとするものである〈例えば特開昭５２−９５９
４５号公報参照〉。In this charging control circuit, the electromotive force of the solar cell 21 is charged to the storage battery 22, and the terminal voltage of the storage battery 22 is detected by the storage battery voltage detection circuit 24, and when the terminal voltage of the storage battery 22 exceeds a predetermined value, By turning on the switching element 25a of the shunt circuit 25 to short-circuit the electromotive force of the solar cell 22 through the shunt circuit 25, the storage battery 22 is prevented from being charged, thereby preventing overcharging of the storage battery 22. (For example, JP-A-52-959
See Publication No. 45>.
（発明が解決しようとする問題点）
ところが、近時のように太陽電池が低価格化してより大
型の太陽電池を採用することが多くなって、蓄電池容量
に比して充電電流が大きくなると、従来の太陽光発電装
置における充電制御回路のように、蓄電池２２の端子電
圧だけで蓄電池２２への充電の可否を判断して制御する
方法では過電流状態で蓄電池が充電される事態がしばし
ば発生し、蓄電池が短寿命化したり、暴爆事故を起こし
てしまう、即ち、太陽電池に比して蓄電池容量が大きい
場合、太陽電池の特性により、自然に電流制限されるた
め、充電電流の問題は省みられなかった。(Problem to be solved by the invention) However, as solar cells have become cheaper in recent years and larger solar cells have become more common, the charging current becomes larger than the capacity of the storage battery. If the charging control circuit in a conventional solar power generation device uses only the terminal voltage of the storage battery 22 to judge and control whether or not the storage battery 22 can be charged, a situation where the storage battery is charged in an overcurrent condition often occurs. In other words, if the storage battery has a large capacity compared to the solar cell, the lifespan of the storage battery may be shortened or an explosive accident may occur.In other words, the current is naturally limited due to the characteristics of the solar cell, so the problem of charging current is eliminated. I couldn't see it.
また、蓄電池もベント形ものでは過電流状態で充電して
もあまり問題を生じないが、近時多用されているシール
形のものでは過電流で充電を厳密に検出する必要が生じ
てきた。In addition, vent-type storage batteries do not cause much of a problem even if they are charged under overcurrent conditions, but with sealed-type storage batteries, which have recently been widely used, it has become necessary to strictly detect overcurrent charging.
本発明は、このような問題点に鑑みて案出されたもので
あり、過電流状態での充電と過充電状態を正確に検知し
て、蓄電池の短寿命化や暴爆事故等を防止する太陽光発
電装置における充電制御回路を提供することを目的とす
るものである。The present invention was devised in view of these problems, and accurately detects overcurrent charging and overcharging to prevent shortening of storage battery life and explosion accidents. The object of the present invention is to provide a charging control circuit for a solar power generation device.
〈問題点を解決するための手段〉
本発明によれば、太陽光を受けて起電力を発生する太陽
電池に蓄電池を接続すると共に、太陽電池の起電力を短
絡させるためのスイッチング素子を設けて蓄電池への充
電を制御する太陽光発電装置における充電制御方式にお
いて、前記蓄電池の端子電圧を検出する蓄電池電圧検出
回路と、前記蓄電池への充電電流を検出する充電電流検
出回路と、前記蓄電池電圧と充電電流を加算する加算回
路と、基準電圧を発生する基準電圧発生回路と、前記加
算回路の出力電圧と基準電圧と比較する比較回路とを設
け、前記加算回路の出力電圧と基準電圧とを比較回路で
比較して加算回路の出力電圧が低いとき、前記スイッチ
ング素子をオフして太陽電池の起電力を前記蓄電池に充
電すると共に、前記加算回路の出力電圧が高いとき、前
記スイッチング素子をオンして太陽電池の起電力を短絡
させることを特徴とする太陽光発電装置における充電制
御方式が提供され、そのことにより上記目的が遠戚され
る。<Means for Solving the Problems> According to the present invention, a storage battery is connected to a solar cell that generates an electromotive force upon receiving sunlight, and a switching element is provided to short-circuit the electromotive force of the solar cell. In a charging control method in a solar power generation device that controls charging to a storage battery, a storage battery voltage detection circuit that detects a terminal voltage of the storage battery, a charging current detection circuit that detects a charging current to the storage battery, and a storage battery voltage detection circuit that detects a terminal voltage of the storage battery. An addition circuit that adds charging currents, a reference voltage generation circuit that generates a reference voltage, and a comparison circuit that compares the output voltage of the addition circuit with the reference voltage are provided, and the output voltage of the addition circuit and the reference voltage are compared. When the output voltage of the adding circuit is low compared to the circuit, the switching element is turned off to charge the electromotive force of the solar cell to the storage battery, and when the output voltage of the adding circuit is high, the switching element is turned on. A charging control method for a solar power generation device is provided, which is characterized by short-circuiting the electromotive force of a solar cell, thereby distantly achieving the above object.
（作用）
上記のように構成することにより、蓄電池の端子電圧信
号と充電電流信号の和信号でシャント回路のスイッチが
制御され、もって過電流状態での充電と過充電を厳密に
防止できる。(Function) With the above configuration, the switch of the shunt circuit is controlled by the sum signal of the terminal voltage signal of the storage battery and the charging current signal, thereby strictly preventing charging in an overcurrent state and overcharging.
（実施例〉 以下、本発明を添付図面に基づき詳細に説明する。(Example> Hereinafter, the present invention will be explained in detail based on the accompanying drawings.
第１図は、本発明に係る太陽光発電装置における充電制
御方式を実施するための回路構成を示す図であり、１は
太陽電池、２は太陽電池ｌによって充電される蓄電池、
３は太陽電池１又は蓄電池２によって充電される負荷、
４はスイッチング素子４ａが介装されたシャント回路で
ある。FIG. 1 is a diagram showing a circuit configuration for implementing a charging control method in a solar power generation device according to the present invention, in which 1 is a solar cell, 2 is a storage battery charged by the solar cell 1,
3 is a load charged by the solar cell 1 or the storage battery 2;
4 is a shunt circuit in which a switching element 4a is interposed.
前記太陽電池１は、単結晶又は多結晶のシリコンやガリ
ウム・砒素にｐ−ｎ接合部を設けて構成され、太陽光が
照射されると起電力を発生する。The solar cell 1 is constructed by providing a pn junction in single crystal or polycrystalline silicon or gallium/arsenic, and generates an electromotive force when irradiated with sunlight.
前記蓄電池２は、例えば鉛シール型蓄電池やニラカド型
蓄電池で構成され、太陽電池１の起電力を充電する。The storage battery 2 is composed of, for example, a lead-sealed storage battery or a Nirakad storage battery, and charges the electromotive force of the solar cell 1.
前記太陽電池１と蓄電池２とは逆流防止用ダイオード５
を介して接続されている。The solar cell 1 and the storage battery 2 have a backflow prevention diode 5
connected via.
前記太陽電池１には、蓄電池２と並列にシャント回路４
が接続されている。このシャント回路４はスイッチング
素子４ａをオン・オフすることによって蓄電池２への充
電の発停を制御する。A shunt circuit 4 is connected to the solar cell 1 in parallel with the storage battery 2.
is connected. This shunt circuit 4 controls starting and stopping of charging of the storage battery 2 by turning on and off a switching element 4a.
前記蓄電池２の○側端子には、蓄電池２への充電電流を
検出する充電電流検出回路６が接続されており、この充
電電流検出回路６には、検出電流信号を電圧信号と同レ
ベルに増幅するための増幅器６ａが介装されており、こ
の増幅度の調整により後述の蓄電池電圧信号と電流信号
の加算比率を微調整できるようにしである。A charging current detection circuit 6 that detects the charging current to the storage battery 2 is connected to the ○ side terminal of the storage battery 2, and the charging current detection circuit 6 amplifies the detected current signal to the same level as the voltage signal. An amplifier 6a is provided for this purpose, and by adjusting the degree of amplification, the addition ratio of the storage battery voltage signal and current signal, which will be described later, can be finely adjusted.
前記蓄電池２には、蓄電池２の端子電圧を検出するため
の蓄電池電圧検出回路７が太陽電池１に対して並列に接
続されている。A storage battery voltage detection circuit 7 for detecting the terminal voltage of the storage battery 2 is connected in parallel to the solar cell 1 in the storage battery 2 .
上記充電電流検出回路６と蓄電池電圧検出回路７は、そ
れぞれ加算器８に接続されている。この加算器８は、充
電電流検出回路６によって検出された充電電流に対応す
る電圧と蓄電池電圧検出回路７によって検出された電圧
を加算して出力するように構成されている。The charging current detection circuit 6 and the storage battery voltage detection circuit 7 are each connected to an adder 8. This adder 8 is configured to add the voltage corresponding to the charging current detected by the charging current detection circuit 6 and the voltage detected by the storage battery voltage detection circuit 7 and output the result.
加算器８の出力は比較回路９の一方の入力端子に人力さ
れ、比較回路９の他方の入力端子には基準電圧発生器１
０から供給される基準電圧が入力される。The output of the adder 8 is input to one input terminal of the comparator circuit 9, and the reference voltage generator 1 is input to the other input terminal of the comparator circuit 9.
A reference voltage supplied from 0 is input.
前記比較回路９の出力信号が、シャント回路４のスイッ
チング素子４ａのベースに供給されるように構成されて
いる。The output signal of the comparison circuit 9 is configured to be supplied to the base of the switching element 4a of the shunt circuit 4.
上述のように構成した充電制御回路によれば、蓄電池電
圧が設定レベル以上の場合、Ｍ電池電圧の検出結果のみ
でシャント回路４のスイッチング素子４ａがオンして蓄
電池２への充電を停止し、充電電流が設定レベル以上の
場合にも、充電電流の検出結果のみでスイッチング素子
４ａがオンし、蓄電池電圧と充電電流の加算値が設定レ
ベル以上の場合にもスイッチング素子４ａがオンして蓄
電池２への充電が停止する。従って、蓄電池２が過電流
状態で充電されることは皆無となる。According to the charging control circuit configured as described above, when the storage battery voltage is higher than the set level, the switching element 4a of the shunt circuit 4 is turned on based only on the detection result of the M battery voltage to stop charging the storage battery 2, Even when the charging current is higher than the set level, the switching element 4a is turned on only by the detection result of the charging current, and even when the sum of the storage battery voltage and the charging current is higher than the set level, the switching element 4a is turned on and the storage battery 2 is turned on. charging stops. Therefore, the storage battery 2 is never charged in an overcurrent state.
（発明の効果〉
以上のように、本発明によれば、加算回路の出力電圧と
基準電圧とを比較回路で比較して加算回路の出力電圧が
低いとき、シャント回路のスイッチング素子をオフして
太陽電池の起電力を前記蓄電池に充電すると共に、加算
回路の出力電圧が高いとき、シャント回路のスイッチン
グ素子をオンして太陽電池の起電力を短絡することこと
から、蓄電池電圧の端子電圧が高くなって満充電状態に
なったときは勿論充電を停止できると共に、過電流状態
で蓄電池が充電されることもなくなり、もって蓄電池を
著しく長寿命化することができる。(Effects of the Invention) As described above, according to the present invention, when the output voltage of the adder circuit and the reference voltage are compared by the comparator circuit and the output voltage of the adder circuit is low, the switching element of the shunt circuit is turned off. In addition to charging the storage battery with the electromotive force of the solar cell, when the output voltage of the adder circuit is high, the switching element of the shunt circuit is turned on to short-circuit the electromotive force of the solar cell, so that the terminal voltage of the storage battery voltage is high. Of course, when the battery reaches a fully charged state, charging can be stopped, and the storage battery will not be charged in an overcurrent state, thereby significantly extending the life of the storage battery.
第１図は本発明に係る太陽光発電装置における充電制御
方式の一実施例を示す回路構成図、第２図は従来の方式
を示す回路構成図である。
第１図
ら
１：太陽電池 ２：蓄電池FIG. 1 is a circuit diagram showing an embodiment of a charging control method in a solar power generation device according to the present invention, and FIG. 2 is a circuit diagram showing a conventional method. Figure 1 et al. 1: Solar cell 2: Storage battery
Claims (1)
接続すると共に、太陽電池の起電力を短絡させるための
スイッチング素子を設けて蓄電池への充電を制御する太
陽光発電装置における充電制御方式において、 前記蓄電池の端子電圧を検出する蓄電池電圧検出回路と
、前記蓄電池への充電電流を検出する充電電流検出回路
と、前記蓄電池電圧と充電電流を加算する加算回路と、
基準電圧を発生する基準電圧発生回路と、前記基準電圧
と加算回路の出力電圧とを比較する比較回路とを設け、 前記加算回路の出力電圧と基準電圧とを比較回路で比較
して加算回路の出力電圧が低いとき、前記スイッチング
素子をオフして太陽電池の起電力を前記蓄電池に充電す
ると共に、加算回路の出力電圧が高いとき、前記スイッ
チング素子をオンして太陽電池の起電力を短絡すること
を特徴とする太陽光発電装置における充電制御方式。[Claims] Solar power generation in which a storage battery is connected to a solar cell that generates an electromotive force in response to sunlight, and a switching element is provided to short-circuit the electromotive force of the solar cell to control charging of the storage battery. A charging control method in the device includes: a storage battery voltage detection circuit that detects a terminal voltage of the storage battery; a charging current detection circuit that detects a charging current to the storage battery; and an addition circuit that adds the storage battery voltage and charging current;
A reference voltage generation circuit that generates a reference voltage and a comparison circuit that compares the reference voltage and the output voltage of the adder circuit are provided, and the output voltage of the adder circuit and the reference voltage are compared by the comparison circuit to determine the output voltage of the adder circuit. When the output voltage is low, the switching element is turned off to charge the electromotive force of the solar cell to the storage battery, and when the output voltage of the adder circuit is high, the switching element is turned on to short-circuit the electromotive force of the solar cell. A charging control method for a solar power generation device characterized by the following.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1343684A JPH03203530A (en) | 1989-12-27 | 1989-12-27 | Charge control system for solar generator unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1343684A JPH03203530A (en) | 1989-12-27 | 1989-12-27 | Charge control system for solar generator unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03203530A true JPH03203530A (en) | 1991-09-05 |
Family
ID=18363451
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1343684A Pending JPH03203530A (en) | 1989-12-27 | 1989-12-27 | Charge control system for solar generator unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03203530A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002034172A (en) * | 2000-07-17 | 2002-01-31 | Nec Mobile Energy Kk | Charger system |
| JP2010004042A (en) * | 2008-06-19 | 2010-01-07 | Macroblock Inc | Photovoltaic circuit |
| JP2012014875A (en) * | 2010-06-29 | 2012-01-19 | Sony Corp | Control device and method, and solar battery |
-
1989
- 1989-12-27 JP JP1343684A patent/JPH03203530A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002034172A (en) * | 2000-07-17 | 2002-01-31 | Nec Mobile Energy Kk | Charger system |
| JP2010004042A (en) * | 2008-06-19 | 2010-01-07 | Macroblock Inc | Photovoltaic circuit |
| JP2012014875A (en) * | 2010-06-29 | 2012-01-19 | Sony Corp | Control device and method, and solar battery |
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