JPH03203529A - Charge control system for solar generating unit - Google Patents
Charge control system for solar generating unitInfo
- Publication number
- JPH03203529A JPH03203529A JP1343683A JP34368389A JPH03203529A JP H03203529 A JPH03203529 A JP H03203529A JP 1343683 A JP1343683 A JP 1343683A JP 34368389 A JP34368389 A JP 34368389A JP H03203529 A JPH03203529 A JP H03203529A
- Authority
- JP
- Japan
- Prior art keywords
- storage battery
- circuit
- charging
- comparator
- charging current
- 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 20
- 238000010248 power generation Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 6
- 238000004880 explosion Methods 0.000 abstract description 3
- 238000004904 shortening Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 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で検出してコントローラ２６に入力し
、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が充電されるのを肪止し、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５２−９５９４５号公報参照）、尚、第
２図中、２７は逆流防止用ダイオードである。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 inputted to the controller 26, so that the terminal voltage of the storage battery 22 is equal to or higher than a predetermined value. When it becomes
By turning on the switching element 25a of the shunt circuit 25 and short-circuiting the electromotive force of the solar cell 22 through the shunt circuit 25, charging of the storage battery 22 is prevented, thereby preventing overcharging of the storage battery 22. (See, for example, Japanese Unexamined Patent Publication No. 52-95945). In FIG. 2, numeral 27 is a backflow prevention diode.
（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
方法では大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ず、しかも蓄電池がベン
ト形ものでは大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大電流
での充電を厳密に検出する必要が生じてきた。(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 often occurs where the storage battery is charged in a large current state. This may shorten the lifespan of the storage battery or cause an explosion. In other words, when the capacity of a storage battery is larger than that of a solar cell, the current is naturally limited due to the characteristics of the solar cell, so the problem of charging current cannot be avoided.Moreover, if the storage battery is vented, it is difficult to charge at a high current state. However, with the sealed type that has been widely used recently, it has become necessary to strictly detect charging with a large current.
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、大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 charging under large current conditions and overcharging conditions 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、前記蓄電池の端子電圧を検出する蓄電池電圧検
出回路と、前記充電電流検出回路の出力と基準電圧とを
比較する第１の比較器と、前記蓄電池電圧検出回路の出
力と基準電圧とを比較する第２の比較器と、前記第１の
比較器の出力信号と第２の比較器の出力信号との論理和
信号を出力する論理和回路とを設け、該論理和回路の出
力信号で前記スッチング素子のオン・オフ制御を行うこ
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達成される。(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 for short-circuiting 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 charging current detection circuit detects a charging current to the storage battery, a storage battery voltage detection circuit detects a terminal voltage of the storage battery, and the charging current detection circuit a first comparator that compares the output of the circuit with a reference voltage; a second comparator that compares the output of the storage battery voltage detection circuit with the reference voltage; and an OR circuit that outputs an OR signal with the output signal of the comparator, and the switching element is controlled on and off by the output signal of the OR circuit.Charging in a solar power generation device A control scheme is provided by which the above objectives are achieved.
（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、もって大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 and overcharging in a large current state.
（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１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によって駆動される負荷、
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 driven 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
型蓄電池などで構成され、太陽電池ｌ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 Niracad storage battery, and is charged with 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 the storage battery 2 by turning on and off the switching element 4a.
前記蓄電池２の○端子側には、蓄電池２への充電電流を
検出する充電電流検出回路６が接続されている。この充
電電流検出回路６は、例えば分流器等で構成される。こ
の充電電流検出回路６には、フィルタ回路７と増幅器８
が接続されている。フィルタ回路７は、主として抵抗７
ａとコンデンサ７ｂで構成され、蓄電池の分極による充
電初期の大電流を検出しないように、また−度光電電流
が流れたらその電流信号を保持して太陽電池１が切り離
されてもしばらくは電流減少を検知しないようにするた
めに設けられる。前記増幅器８は、電流検出信号を電圧
信号と同レベルに増幅するために設けられる。A charging current detection circuit 6 for detecting a charging current to the storage battery 2 is connected to the O terminal side of the storage battery 2 . This charging current detection circuit 6 is composed of, for example, a current shunt. This charging current detection circuit 6 includes a filter circuit 7 and an amplifier 8.
is connected. The filter circuit 7 mainly includes a resistor 7
A and a capacitor 7b, so as not to detect a large current at the initial stage of charging due to the polarization of the storage battery, and to maintain the current signal when a photoelectric current flows, so that the current decreases for a while even if the solar cell 1 is disconnected. This is provided to prevent detection of The amplifier 8 is provided to amplify the current detection signal to the same level as the voltage signal.
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９が設けられている。即ち、分圧
用抵抗９ａ、９ｂ間の電圧を検出することにより、蓄電
池２の端子電圧が検出される。The storage battery 2 is provided with a storage battery voltage detection circuit 9 for detecting the terminal voltage of the storage battery 2. That is, the terminal voltage of the storage battery 2 is detected by detecting the voltage between the voltage dividing resistors 9a and 9b.
前記充電電流検出回路６の出力は第１の比較器１０に人
力され、蓄電池電圧検出回路９の出力は第２の比較器１
１に入力される。この比較器１ｏ、１１には基準電圧発
生器１２で発生する基準電圧がそれぞれ入力される。The output of the charging current detection circuit 6 is input to the first comparator 10, and the output of the storage battery voltage detection circuit 9 is input to the second comparator 1.
1 is input. A reference voltage generated by a reference voltage generator 12 is input to the comparators 1o and 11, respectively.
前記比較器１０．１１の出力は、それぞれ論理和回路１
３に入力され、この論理和回路１３の出力信号でシャン
ト回路４のスイッチング素子４ａのオン・オフが制御さ
れる。The outputs of the comparators 10 and 11 are respectively connected to the OR circuit 1.
3, and the output signal of this OR circuit 13 controls on/off 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、充電電流
又は蓄電池電圧のうちのいずれか一方若しくは双方が基
準電圧以上のときに、シャント回路４のスイッチング素
子４ａがオンし蓄電池２への充電が停止される。According to the charging control circuit configured as described above, when either or both of the charging current and the storage battery voltage are equal to or higher than the reference voltage, the switching element 4a of the shunt circuit 4 is turned on and charging of the storage battery 2 is stopped. will be stopped.
（発明の効果〉
以上のように、本発明によれば、充電電流又は蓄電池電
圧のうちのいずれか一方若しくは双方が設定レベル以上
のときに、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、大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 either or both of the charging current and the storage battery voltage are at or above a set level, the switching element of the shunt circuit is turned on to activate the solar cell. By short-circuiting the power, charging can of course be stopped when the terminal voltage of the storage battery becomes high and the battery is fully charged, and the storage battery will not be charged in a high current state, which will significantly extend the battery life. It can extend its lifespan.
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。
１：太陽電池 ２：蓄電池
４ニジヤント回路 ４ａニスイツチング素子６：充電電
流検出回路
９：蓄電池電圧検出回路
１０：第１の比較器
１３：論理和回路
１１：第２の比較器
第１図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. 1: Solar cell 2: Storage battery 4 nitrogen circuit 4a Niswitching element 6: Charging current detection circuit 9: Storage battery voltage detection circuit 10: First comparator 13: OR circuit 11: Second comparator FIG.
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
、前記蓄電池の端子電圧を検出する蓄電池電圧検出回路
と、前記充電電流検出回路の出力と基準電圧とを比較す
る第１の比較器と、前記蓄電池電圧検出回路の出力と基
準電圧とを比較する第２の比較器と、前記第１の比較器
の出力信号と第２の比較器の出力信号との論理和信号を
出力する論理和回路とを設け、該論理和回路の出力信号
で前記スッチング素子のオン・オフ制御を行うことを特
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. In the charging control method in the device, a charging current detection circuit that detects a charging current to the storage battery, a storage battery voltage detection circuit that detects a terminal voltage of the storage battery, and an output of the charging current detection circuit and a reference voltage are compared. a first comparator, a second comparator that compares the output of the storage battery voltage detection circuit with a reference voltage, and a logical sum of the output signal of the first comparator and the output signal of the second comparator. 1. A charging control method for a solar power generation device, characterized in that an OR circuit that outputs a signal is provided, and the switching element is controlled on and off by the output signal of the OR circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1343683A JPH03203529A (en) | 1989-12-27 | 1989-12-27 | Charge control system for solar generating unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1343683A JPH03203529A (en) | 1989-12-27 | 1989-12-27 | Charge control system for solar generating unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03203529A true JPH03203529A (en) | 1991-09-05 |
Family
ID=18363442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1343683A Pending JPH03203529A (en) | 1989-12-27 | 1989-12-27 | Charge control system for solar generating unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03203529A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1039621A2 (en) * | 1999-03-24 | 2000-09-27 | Sanyo Electric Co., Ltd. | Photovoltaic power generation device |
| JP2010004042A (en) * | 2008-06-19 | 2010-01-07 | Macroblock Inc | Photovoltaic circuit |
-
1989
- 1989-12-27 JP JP1343683A patent/JPH03203529A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1039621A2 (en) * | 1999-03-24 | 2000-09-27 | Sanyo Electric Co., Ltd. | Photovoltaic power generation device |
| EP1039621A3 (en) * | 1999-03-24 | 2003-05-21 | Sanyo Electric Co., Ltd. | Photovoltaic power generation device |
| JP2010004042A (en) * | 2008-06-19 | 2010-01-07 | Macroblock Inc | Photovoltaic circuit |
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