JP3459428B2 - Solar cell equipment - Google Patents
Solar cell equipmentInfo
- Publication number
- JP3459428B2 JP3459428B2 JP31096691A JP31096691A JP3459428B2 JP 3459428 B2 JP3459428 B2 JP 3459428B2 JP 31096691 A JP31096691 A JP 31096691A JP 31096691 A JP31096691 A JP 31096691A JP 3459428 B2 JP3459428 B2 JP 3459428B2
- Authority
- JP
- Japan
- Prior art keywords
- storage battery
- solar cell
- prevention circuit
- load
- 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.)
- Expired - Fee Related
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
- Supply And Distribution Of Alternating Current (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は太陽電池にて発電された
電力を蓄電池に貯えて利用する太陽電池機器に関する。
【０００２】
【従来の技術】太陽電池にて発電された電力で各種の電
気機器を駆動するシステムが提案され、実用化されてい
る。一方、太陽電池は太陽光の照射を受けると発電する
が、太陽光がなくなると発電をしない。従って太陽光の
存在に左右されずに負荷の電気機器を駆動させるには、
図２に示す概念構成のように、太陽電池１が太陽光の照
射を受けている間に発電する電力を蓄電池２に貯えてお
き、太陽光が陰った時は蓄電池２に貯えておいた電力で
負荷３を駆動することが考えらている。
【０００３】ところが一般に蓄電池２は過充電をした
り、過放電をすると電池寿命を極端に損なうことから、
このようなシステムにおいては必ず過充電防止回路４と
過放電防止回路５とが付加されている。
【０００４】一方、図２に示したシステムの負荷３がエ
アコンなどの電力機器の場合、その電力の全てを太陽電
池１からの電力のみで賄うことは技術的には可能である
が、実用面では極めて大きな太陽電池を必要とすること
などから非効率的である。そのためにこのような大きな
電力を必要とする電気機器３を駆動させる場合は、系統
電源６との併用が一般的とされていおり、ソーラエアコ
ンとの名称を付して商品化されているものも斯様な系統
電源６との併用構成が採用されている。
【０００５】
【発明が解決しようとする課題】然し乍ら上記した系統
電源６との併用構成の場合、系統電源６が何らかの原因
でダウンした時の安全対策や、その時の過充電防止回路
４や過放電防止回路５の機能を確保する対策が不可欠で
ある。
【０００６】
【課題を解決するための手段】本発明はこのような課題
を解決するために為されたものであって、太陽電池にて
発電された電力を蓄電池に貯えると同時に、その電力に
よって、系統電源にて駆動される負荷を駆動する太陽電
池機器において、太陽電池から蓄電池への過充電を防止
するための過充電防止回路と、蓄電池から負荷への過放
電を防止するための過放電防止回路と、を具備し、前記
過充電防止回路は蓄電池にて駆動される、電圧上限セン
サーと、このセンサーにより蓄電池の端子電圧が規定以
上に上昇したことを検出した時に太陽電池と蓄電池とを
遮断する常開の遮断器と、を主構成要素とし、前記過放
電防止回路は系統電源にて駆動される、電圧下限センサ
ーと、このセンサーにより蓄電池の端子電圧が規定以下
に低下したことを検出した時に蓄電池と負荷とを遮断す
る常開の遮断器と、から構成されることにより、前記系
統電源が停電状態となると、前記過放電防止回路を駆動
する電力も同時に断たれるものである。
【０００７】
【作用】本発明によれば、系統電源がダウンした場合に
は蓄電池から負荷への電力供給は断たれる一方、太陽電
池から蓄電池への充電は適正に行われる。
【０００８】
【実施例】図１は本発明太陽電池機器の構成を示すブロ
ック図であって、１〜６は図２と同様に、太陽電池、蓄
電池、大きな電力を必要とする電気機器からなる負荷、
過充電防止回路、過放電防止回路、系統電源である。ま
た７は太陽電池１、並びに蓄電池２からの電力を負荷３
に適した形態に変換する電力変換回路で、例えば負荷３
が系統電源６にて直接駆動される交流負荷の場合であれ
ばＤＣ／ＡＣインバータがこれに該当し、また直流負荷
の場合はその負荷が要求する電圧に変換するＤＣ／ＤＣ
コンバータが用いられる。
【０００９】本発明の特徴とするところは、過充電防止
回路４、並びに過放電防止回路５そのものを駆動する電
源にある。即ち、過充電防止回路４は蓄電池２からの電
力にて駆動され、また過放電防止回路５は系統電源６か
らの電力にて駆動される構成を採っている。尚、この図
１において破線で示したのは駆動電力の流れを示してい
る。
【００１０】図１に示した構成図から明らかなように、
過充電防止回路４としては蓄電池２が満充電状態とな
り、その端子電圧が定格電圧より規程以上に上昇するこ
とを検出する電圧上限センサー４１と、このセンサー４
１が蓄電池２の端子電圧が規程以上に上昇したことを検
出した時に太陽電池１と蓄電池２とを遮断する常開の遮
断器４２とを主構成要素としている。また過放電防止回
路５は蓄電池２からの放電が進み、それ以上の放電を継
続すると蓄電池２を痛める端子電圧を検出する電圧下限
センサー５１と、このセンサー５１が働いたときに太陽
電池１や蓄電池２と負荷３とを遮断する常開の遮断器５
２とによって構成されている。
【００１１】次に具体的な数値を挙げて説明を加える。
太陽電池１としては定格１２Ｖ、１３Ａの太陽電池パネ
ルが用いられ、蓄電池２としては２４Ｖ、６５Ａのもの
が採用されている。また過充電防止回路４の電圧上限セ
ンサー４１のセンシング電圧は２８Ｖであり、また過放
電防止回路５の電圧下限センサー５１のセンシング電圧
は２３Ｖに設定されている。
【００１２】斯る構成において、太陽電池１へ太陽光が
照射されているとその太陽電池１は発電を行い、蓄電池
２に充電が為される。その充電が進行し、満充電状態に
なると蓄電池２の端子電圧が上昇し、過充電防止回路４
の電圧上限センサー４１のセンシング電圧の２８Ｖを越
えると遮断器４２が切れ、太陽電池１からの蓄電池２へ
の充電が中断され、蓄電池２の過充電を防止する。この
過充電防止回路４は蓄電池２からの電力によって常に動
作状態にあり、蓄電池２の電圧が電圧上限センサー４１
のセンシング電圧より低くなると、遮断器４２をＯＮし
て充電を再開する。また蓄電池２から電力変換回路７を
介して負荷３へ電力が供給され蓄電池２の容量が減って
くると、その蓄電池２の端子電圧は低下し、過放電防止
回路５の電圧下限センサー５１のセンシング電圧２３Ｖ
以下になると遮断器５２はＯＦＦとなり、蓄電池２から
負荷３への電力供給は中断され、蓄電池２の過放電は防
止される。この過放電防止回路５は系統電源６からの電
力にて駆動されているので、その後に太陽電池１から蓄
電池２への充電が進行し、蓄電池２が充電状態になる
と、その端子電圧が上昇するので再び遮断器５２がＯＮ
して蓄電池２から負荷への電力供給が為される。勿論、
この太陽電池１や蓄電池２からの電力以外に、系統電源
６からの電力も負荷３に供給され、蓄電池２などからの
供給電力不足を賄う構成となっている。
【００１３】一方、系統電源６が何らかの原因でダウン
して停電状態となると、過放電防止回路５を駆動する電
力も同時に断たれるので、この過放電防止回路５は動作
を中止し、遮断器５２も自動的にＯＦＦとなって蓄電池
２と負荷３とを遮断する。その結果、系統電源６の停電
中は蓄電池２から負荷３へ電流が流れることはないの
で、停電中であるとの認識によって負荷３を修理したり
した時に蓄電池２からの電力によって感電したりする事
故は未然に防止できると同時に、蓄電池２の過放電をも
完全に排除できる。
【００１４】また蓄電池２が何らかの原因でダウンした
り、異常に電圧が低下した場合、過充電防止回路４の動
作が停止するので、遮断器４２がＯＦＦとなり、太陽電
池１と蓄電池２とが遮断されるので太陽電池２からの電
力が異常状態にある蓄電池２へ供給され、事故を起こす
恐れもない。
【００１５】
【発明の効果】本発明によれば、系統電源がダウンした
場合には蓄電池から負荷への電力供給は断たれる一方、
太陽電池から蓄電池への適正な充電は行われ、蓄電池の
過充電、過放電は防止されると同時に、系統電源や蓄電
池が異常状態となった時に、感電事故などを未然に防止
し、安全性を確保することができる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solar battery device for storing and using power generated by a solar battery in a storage battery. 2. Description of the Related Art A system for driving various electric devices with electric power generated by a solar cell has been proposed and put into practical use. On the other hand, a solar cell generates power when irradiated with sunlight, but does not generate power when sunlight disappears. Therefore, in order to drive the load electrical equipment without being affected by the presence of sunlight,
As shown in the conceptual configuration shown in FIG. 2, the power generated while the solar cell 1 is irradiated with sunlight is stored in the storage battery 2, and the power stored in the storage battery 2 when the sunlight is shaded It is conceivable to drive the load 3 by using. However, in general, the storage battery 2 is overcharged or overdischarged, which greatly shortens the battery life.
In such a system, an overcharge prevention circuit 4 and an overdischarge prevention circuit 5 are always added. On the other hand, when the load 3 of the system shown in FIG. 2 is a power device such as an air conditioner, it is technically possible to cover all of the power with only the power from the solar cell 1, but it is practically possible. This is inefficient because it requires an extremely large solar cell. Therefore, when driving the electric equipment 3 which requires such large electric power, it is generally used in combination with the system power supply 6, and some of them are commercialized with the name of a solar air conditioner. Such a combined configuration with the system power supply 6 is employed. However, in the case of the combined use with the system power supply 6 described above, a safety measure when the system power supply 6 goes down for some reason, an overcharge prevention circuit 4 and an overdischarge at that time. A measure for ensuring the function of the prevention circuit 5 is indispensable. SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and stores electric power generated by a solar cell in a storage battery, and at the same time, uses the electric power. In a solar battery device that drives a load driven by a system power supply, an overcharge prevention circuit for preventing overcharge from the solar cell to the storage battery and an overdischarge for preventing overdischarge from the storage battery to the load. And an overcharge prevention circuit, wherein the overcharge prevention circuit is driven by a storage battery, and a voltage upper limit sensor, and when the sensor detects that the terminal voltage of the storage battery has risen above a specified level, the solar battery and a normally open breaker for disconnecting the battery, was used as a main component, the overdischarge prevention circuit is driven by the system power supply, and voltage lower limit sensor, the terminal voltage of the storage battery by the sensor defined below And normally open breaker to disconnect the load and battery when it is detected that reduced by Rukoto consists, the system
When the power supply goes out of power, the overdischarge prevention circuit is driven.
Power also is also from being cut off at the same time. According to the present invention, when the system power supply goes down, power supply from the storage battery to the load is cut off, while charging from the solar battery to the storage battery is performed properly. FIG. 1 is a block diagram showing the structure of a solar cell device according to the present invention. As shown in FIG. 2, reference numerals 1 to 6 each include a solar cell, a storage battery, and an electric device requiring a large amount of power. load,
An overcharge prevention circuit, an overdischarge prevention circuit, and a system power supply. Reference numeral 7 designates a load 3 from the solar cell 1 and the storage battery 2.
A power conversion circuit for converting to a form suitable for
Is an AC load directly driven by the system power supply 6, this corresponds to a DC / AC inverter. In the case of a DC load, the DC / DC converter converts the voltage to a voltage required by the load.
A converter is used. A feature of the present invention resides in a power supply for driving the overcharge prevention circuit 4 and the overdischarge prevention circuit 5 themselves. That is, the overcharge prevention circuit 4 is driven by power from the storage battery 2, and the overdischarge prevention circuit 5 is driven by power from the system power supply 6. The broken line in FIG. 1 indicates the flow of the driving power. As is clear from the configuration diagram shown in FIG.
The overcharge prevention circuit 4 includes a voltage upper limit sensor 41 for detecting that the storage battery 2 is in a fully charged state and the terminal voltage of the storage battery 2 exceeds a rated voltage by a specified amount or more.
The main component is a normally open circuit breaker 42 that shuts off the solar cell 1 and the storage battery 2 when the terminal 1 detects that the terminal voltage of the storage battery 2 has risen above a specified value. The over-discharge prevention circuit 5 includes a voltage lower limit sensor 51 for detecting a terminal voltage that causes damage to the storage battery 2 when the discharge from the storage battery 2 proceeds and the discharge is continued further, and the solar battery 1 and the storage battery when the sensor 51 operates. A normally open circuit breaker 5 that cuts off the load 2 and the load 3
And 2. Next, description will be given with specific numerical values.
A solar cell panel having a rating of 12 V and 13 A is used as the solar cell 1, and a storage cell 2 having a rating of 24 V and 65 A is used. The sensing voltage of the voltage upper limit sensor 41 of the overcharge prevention circuit 4 is set to 28 V, and the sensing voltage of the voltage lower limit sensor 51 of the overdischarge prevention circuit 5 is set to 23 V. In such a configuration, when the solar cell 1 is irradiated with sunlight, the solar cell 1 generates power and the storage battery 2 is charged. When the charging proceeds and the battery is fully charged, the terminal voltage of the storage battery 2 increases, and the overcharge prevention circuit 4
When the voltage exceeds 28 V of the sensing voltage of the voltage upper limit sensor 41, the circuit breaker 42 is turned off, and the charging of the storage battery 2 from the solar cell 1 is interrupted, thereby preventing the storage battery 2 from being overcharged. The overcharge prevention circuit 4 is always operating by the power from the storage battery 2, and the voltage of the storage battery 2 is
, The circuit breaker 42 is turned on to restart charging. When power is supplied from the storage battery 2 to the load 3 via the power conversion circuit 7 and the capacity of the storage battery 2 decreases, the terminal voltage of the storage battery 2 decreases, and the voltage lower limit sensor 51 of the overdischarge prevention circuit 5 senses. Voltage 23V
Below this, the circuit breaker 52 is turned off, the power supply from the storage battery 2 to the load 3 is interrupted, and the overdischarge of the storage battery 2 is prevented. Since the overdischarge prevention circuit 5 is driven by the power from the system power supply 6, the charge from the solar cell 1 to the storage battery 2 proceeds thereafter, and when the storage battery 2 is charged, the terminal voltage increases. So the circuit breaker 52 is turned on again
Thus, power is supplied from the storage battery 2 to the load. Of course,
In addition to the power from the solar cell 1 and the storage battery 2, the power from the system power supply 6 is also supplied to the load 3 to cover the shortage of the power supply from the storage battery 2 and the like. On the other hand, when the system power supply 6 goes down for some reason and enters a power failure state, the power for driving the over-discharge prevention circuit 5 is also cut off at the same time. 52 is also automatically turned off to shut off the storage battery 2 and the load 3. As a result, current does not flow from the storage battery 2 to the load 3 during a power failure of the system power supply 6, so that when the load 3 is repaired by recognizing that the power failure is occurring, an electric shock is caused by the power from the storage battery 2. Accidents can be prevented beforehand, and overdischarge of the storage battery 2 can be completely eliminated. If the storage battery 2 goes down for some reason or the voltage drops abnormally, the operation of the overcharge prevention circuit 4 stops, so that the circuit breaker 42 is turned off, and the solar cell 1 and the storage battery 2 are cut off. Therefore, the power from the solar cell 2 is supplied to the storage battery 2 in an abnormal state, and there is no danger of causing an accident. According to the present invention, while the power supply from the storage battery to the load is cut off when the system power supply goes down,
Appropriate charging from the solar cell to the storage battery is performed, preventing overcharging and overdischarging of the storage battery. Can be secured.
【図面の簡単な説明】
【図１】本発明太陽電池機器の構成を示すブロック図で
ある。
【図２】従来の構成を示すブロック図である。
【符号の説明】
１ 太陽電池
２ 蓄電池
３ 負荷
４ 過充電防止回路
５ 過放電防止回路BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a configuration of a solar cell device of the present invention. FIG. 2 is a block diagram showing a conventional configuration. [Description of Signs] 1 solar cell 2 storage battery 3 load 4 overcharge prevention circuit 5 overdischarge prevention circuit
フロントページの続き (72)発明者 辻野 晋行 大阪府守口市京阪本通２丁目18番地 三 洋電機株式会社内 (72)発明者 安井 一郎 大阪府守口市京阪本通２丁目18番地 三 洋電機株式会社内 (56)参考文献 特開 平３−22829（ＪＰ，Ａ) 特開 平２−7832（ＪＰ，Ａ) 実開 昭61−14862（ＪＰ，Ｕ)Continuation of front page (72) Inventor: Shinji Tsujino 2-18-18 Keihanhondori, Moriguchi-shi, Osaka Yo Electric Co., Ltd. (72) Inventor Ichiro Yasui 2-18-18 Keihanhondori, Moriguchi-shi, Osaka Yo Electric Co., Ltd. (56) References JP-A-3-22829 (JP, A) JP-A-2-7832 (JP, A) Shokai Sho 61-14862 (JP, U)
Claims (1)
貯えると同時に、その電力によって、系統電源にて駆動
される負荷を駆動する太陽電池機器において、太陽電池
から蓄電池への過充電を防止するための過充電防止回路
と、蓄電池から負荷への過放電を防止するための過放電
防止回路と、を具備し、前記 過充電防止回路は蓄電池にて駆動される、電圧上限
センサーと、このセンサーにより蓄電池の端子電圧が規
定以上に上昇したことを検出した時に太陽電池と蓄電池
とを遮断する常開の遮断器と、を主構成要素とし、前記 過放電防止回路は系統電源にて駆動される、電圧下
限センサーと、このセンサーにより蓄電池の端子電圧が
規定以下に低下したことを検出した時に蓄電池と負荷と
を遮断する常開の遮断器と、から構成されることによ
り、前記系統電源が停電状態となると、前記過放電防止
回路を駆動する電力も同時に断たれることを特徴とした
太陽電池機器。(57) [Claim 1] In a solar battery device that stores a power generated by a solar cell in a storage battery and drives a load driven by a system power supply with the power, An overcharge prevention circuit for preventing overcharge from the battery to the storage battery, and an overdischarge prevention circuit for preventing overdischarge from the storage battery to the load, wherein the overcharge prevention circuit is driven by the storage battery It is the, and the upper voltage limit sensor, a normally open breaker for disconnecting the solar cell and the storage battery when it is detected that the terminal voltage of the storage battery by the sensor rises above provisions, the main components, the over-discharge The prevention circuit is driven by a system power supply, a voltage lower limit sensor, a normally open circuit breaker that shuts off the storage battery and the load when the sensor detects that the terminal voltage of the storage battery has dropped below a specified value, To Rukoto is al configuration
When the system power supply goes into a power failure state, the overdischarge prevention
A solar cell device characterized in that the power for driving the circuit is also cut off at the same time .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31096691A JP3459428B2 (en) | 1991-11-26 | 1991-11-26 | Solar cell equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31096691A JP3459428B2 (en) | 1991-11-26 | 1991-11-26 | Solar cell equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05153740A JPH05153740A (en) | 1993-06-18 |
| JP3459428B2 true JP3459428B2 (en) | 2003-10-20 |
Family
ID=18011550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31096691A Expired - Fee Related JP3459428B2 (en) | 1991-11-26 | 1991-11-26 | Solar cell equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3459428B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100452967B1 (en) * | 2002-04-24 | 2004-10-14 | 헥스파워시스템(주) | Apparatus and method for controlling power controller for solar power generation |
| BE1017670A6 (en) * | 2007-07-04 | 2009-03-03 | De Ram Gaston Alain | AUTONOMOUS SOLAR PARASOL SYSTEM. |
| JP2011114961A (en) * | 2009-11-27 | 2011-06-09 | Tokyo Electric Power Co Inc:The | Charging system, charger, motor-driven vehicle and method for charging battery for the motor-driven vehicle |
-
1991
- 1991-11-26 JP JP31096691A patent/JP3459428B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05153740A (en) | 1993-06-18 |
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