JP2010063359A - Power supply system - Google Patents

Power supply system Download PDF

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JP2010063359A
JP2010063359A JP2009283705A JP2009283705A JP2010063359A JP 2010063359 A JP2010063359 A JP 2010063359A JP 2009283705 A JP2009283705 A JP 2009283705A JP 2009283705 A JP2009283705 A JP 2009283705A JP 2010063359 A JP2010063359 A JP 2010063359A
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storage battery
charging
voltage
lead storage
power supply
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Hidemi Fukunaga
秀美 福永
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Panasonic Corp
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Panasonic Corp
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

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  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract

<P>PROBLEM TO BE SOLVED: To suppress a decrease of the capacity of a storage battery caused by insufficient charging or over charging of the storage battery, in a charge control device which charges a storage battery by an output of a solar cell, and a power supply system including the charge control device. <P>SOLUTION: The power supply system comprises: a solar cell; a lead storage cell; a charge control device for charging the lead storage cell by an output of the solar cell; and an optical sensor. The charge control device opens a charge circuit when the voltage of the storage battery at the charging time is raised to a first set voltage, closes the charge circuit again for charging when the voltage of the storage battery is lowered to a second set voltage which is lower than the first set voltage. When the charge current of the lead storage cell is less than or equal to the set current, the charge control device continues charging without opening the charge circuit even if the storage battery voltage is increased to the first set voltage or higher. When illuminance measured by the optical sensor becomes the set value or below, power is supplied to a load from the lead storage cell. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、太陽電池と蓄電池の組み合わせによる電力供給システムに関するものである。   The present invention relates to a power supply system using a combination of a solar battery and a storage battery.

太陽電池と鉛蓄電池の組み合わせによる電力供給システムで、鉛蓄電池の過充電を抑制する方法として(1)充電電圧が一定値以上になった場合に充電回路を開放し、蓄電池電圧がある値以下に低下すると再度充電回路を閉じて再充電を行う方法、さらには(2)マイコン等により充放電電気量を積算して、鉛蓄電池の放電電気量と充電効率を考慮した充電電気量で充電回路を開放制御する方法等が知られている。   In a power supply system using a combination of solar cells and lead-acid batteries, as a method to suppress overcharge of lead-acid batteries: (1) When the charging voltage exceeds a certain value, the charging circuit is opened, and the accumulator voltage falls below a certain value. When the voltage drops, the charging circuit is closed again and recharging is performed. (2) The charging / discharging electricity amount is integrated by a microcomputer or the like, and the charging circuit is charged with the charging electricity amount in consideration of the discharging electricity amount and the charging efficiency of the lead storage battery. A method for controlling the opening is known.

特開昭63−103627号公報JP-A-63-103627

太陽電池の出力電流は天候,時刻により大きな変動がある。従って前記した(1)に示す従来の方法では鉛蓄電池の充電末期に充電電流が大きい時は鉛蓄電池が完全に充電されていないにもかかわらず、充電電圧が充電制御電圧にまで上昇して充電回路が開放されることになる。その結果として、蓄電池は満充電状態まで充電されず、充電不足サイクルになりやすく、蓄電池の寿命が低下するという欠点を有していた。   The output current of solar cells varies greatly depending on the weather and time. Therefore, in the conventional method shown in the above (1), when the charge current is large at the end of charging of the lead storage battery, the charge voltage rises to the charge control voltage even though the lead storage battery is not fully charged. The circuit will be opened. As a result, the storage battery is not charged to a fully charged state, tends to be in an undercharged cycle, and has a drawback that the life of the storage battery is reduced.

また、前記した(2)に示す従来の方法では充放電電流の計測精度が低い場合やインパルスノイズ等によりマイコンが誤作動した場合に充放電電気量の積算値がリセットされて計測値が実際の状態と全く違った値となり、誤った充電制御をされる。このような問題を避けるために高い電流計測精度やマイコンシステムが長期にわたって誤作動しないという高い信頼性が必要となるという問題点を有していた。   In the conventional method shown in (2) above, when the charge / discharge current measurement accuracy is low or the microcomputer malfunctions due to impulse noise or the like, the integrated value of charge / discharge electricity is reset and the measured value is The value is completely different from the state, and incorrect charge control is performed. In order to avoid such a problem, there is a problem that high current measurement accuracy and high reliability that the microcomputer system does not malfunction for a long time are required.

本発明は前記したような従来方法で発生する充電不足による蓄電池寿命の低下を抑制できる電源システムを比較的簡便な構成で提供することを目的とする。   An object of the present invention is to provide a power supply system having a relatively simple configuration that can suppress a decrease in the life of a storage battery due to insufficient charging that occurs in the conventional method as described above.

前記した課題を解決するために本発明の請求項1に記載の発明は、太陽電池と、鉛蓄電池と、太陽電池の出力により鉛蓄電池を充電する充電制御装置と、光センサとからなる電源システムであって、充電制御装置は、充電時の蓄電池電圧が第1の設定電圧まで上昇すると充電回路を開放し、蓄電池電圧が第1の設定電圧よりも低い第2の設定電圧まで低下すると再度充電回路を閉じて充電を行う機能を備えるとともに、鉛蓄電池の充電電流が設定電流以下の場合は第1の設定電圧以上に蓄電池電圧が上昇しても充電回路を開放しないで充電を継続するようにしており、光センサが計測する照度が設定値以下になると、鉛蓄電池から負荷に電力が供給されるようにしたことを特徴とする電源システムを示すものである。   In order to solve the above-mentioned problem, the invention according to claim 1 of the present invention is a power supply system comprising a solar battery, a lead storage battery, a charge control device for charging the lead storage battery by the output of the solar battery, and an optical sensor. The charging control device opens the charging circuit when the storage battery voltage during charging rises to the first set voltage, and recharges when the storage battery voltage drops to the second set voltage lower than the first set voltage. In addition to having the function of charging with the circuit closed, if the charge current of the lead acid battery is less than or equal to the set current, the charge circuit will continue to open without opening the charge circuit even if the battery voltage rises above the first set voltage. The power supply system is characterized in that when the illuminance measured by the optical sensor becomes a set value or less, power is supplied from the lead storage battery to the load.

本発明の請求項2に記載の発明は、請求項1に記載の構成を備えた電源システムにおいて、充電制御装置は、充電時の蓄電池電圧が第1の設定電圧まで上昇すると充電回路を開放し、蓄電池電圧が第2の設定電圧まで低下すると再度充電回路を閉じて充電を行う制御を繰り返すことを示すものである。   According to a second aspect of the present invention, in the power supply system having the configuration according to the first aspect, the charge control device opens the charging circuit when the storage battery voltage during charging rises to the first set voltage. When the storage battery voltage drops to the second set voltage, the charging circuit is closed again and the control for charging is repeated.

本発明の請求項3に記載の発明は、請求項1に記載の構成を備えた電源システムにおいて、鉛蓄電池は制御弁式鉛蓄電池であり設定電流は制御弁式鉛蓄電池の密閉反応効率以下であることを示すものである。   According to a third aspect of the present invention, in the power supply system having the configuration according to the first aspect, the lead storage battery is a control valve type lead storage battery, and the set current is less than the sealed reaction efficiency of the control valve type lead storage battery. It shows that there is.

本発明による電源システムは太陽電池から蓄電池に適正な充電制御を行うことによって、従来発生していた充電不足による蓄電池容量の低下を抑制することができる。   The power supply system by this invention can suppress the fall of the storage battery capacity by the insufficient charge which generate | occur | produced conventionally by performing appropriate charge control from a solar cell to a storage battery.

本発明の一実施の形態による充電制御装置1とそれを用いた電源システムAを示すブロック図The block diagram which shows the charge control apparatus 1 by one embodiment of this invention, and the power supply system A using the same 本発明の他の実施の形態による充電制御装置1aとそれを用いた電源システムBを示すブロック図The block diagram which shows the charge control apparatus 1a by other embodiment of this invention, and the power supply system B using the same 本発明例の電源システムA,Bと比較例による電源システムの蓄電池の容量推移を示す図The figure which shows the capacity transition of the storage battery of the power supply system by the power supply systems A and B of this invention example, and a comparative example

本発明の一実施の形態を図面を用いて説明する。   An embodiment of the present invention will be described with reference to the drawings.

図1は本発明による充電制御装置1とそれを用いた電源システムAを示すブロック図である。充電制御装置1はCPU2、プログラムROM3、RAM4、設定情報や設定データ等を保存するSRAM5、設定入力用スイッチSWを備えた入力部6、計測・演算データ等を表示する液晶表示装置等の表示部7、太陽電池からの充電回路の開閉を行うFETスイッチ等の太陽電池充電回路スイッチ8を制御する出力部9、A/Dコンバータ10等から構成される。   FIG. 1 is a block diagram showing a charging control device 1 according to the present invention and a power supply system A using the same. The charging control device 1 includes a CPU 2, a program ROM 3, a RAM 4, an SRAM 5 for storing setting information and setting data, an input unit 6 having a setting input switch SW, and a display unit such as a liquid crystal display device for displaying measurement / calculation data. 7. An output unit 9 for controlling a solar battery charging circuit switch 8 such as an FET switch for opening and closing a charging circuit from the solar battery, an A / D converter 10 and the like.

この充電制御装置1には太陽電池パネル11が逆流防止用整流素子12を介して接続されるとともに、鉛蓄電池13からDC/DCコンバータ14を介して電源が供給されている。鉛蓄電池の充放電電流計測用のシャント抵抗15はマルチプレクサ16およびA/Dコンバータ10を介してCPU2に充放電電流値データを提供する。鉛蓄電池13の電圧は総電圧計測端子17で充放電電流と同様、A/Dコンバータ10を介してCPU2に読込まれる。   A solar cell panel 11 is connected to the charging control device 1 via a backflow preventing rectifying element 12, and power is supplied from a lead storage battery 13 via a DC / DC converter 14. The shunt resistor 15 for measuring the charge / discharge current of the lead storage battery provides charge / discharge current value data to the CPU 2 via the multiplexer 16 and the A / D converter 10. The voltage of the lead storage battery 13 is read into the CPU 2 via the A / D converter 10 at the total voltage measurement terminal 17 as with the charge / discharge current.

本発明の充電制御装置1においては鉛蓄電池13の電池電圧が第1の設定電圧(V1)に到達すれば太陽電池充電回路スイッチ8を開放することにより太陽電池パネル11から鉛蓄電池13への充電が休止する。その後、鉛蓄電池13の電池電圧が第2の設定電圧(V2)まで低下すると再度太陽電池充電回路スイッチ8を閉じる制御が繰り返し行われる。 In the charge control device 1 of the present invention, when the battery voltage of the lead storage battery 13 reaches the first set voltage (V 1 ), the solar battery charging circuit switch 8 is opened to switch the solar battery panel 11 to the lead storage battery 13. Charging stops. After that, when the battery voltage of the lead storage battery 13 is lowered to the second set voltage (V 2 ), the control for closing the solar battery charging circuit switch 8 is repeatedly performed.

ここで鉛蓄電池13の電池電圧が第1の設定電圧(V1)に到達した時点で鉛蓄電池の充電電流が予め設定された設定電流(I1)以下の場合には太陽電池充電回路スイッチ8の開放動作は行わず、連続して鉛蓄電池13への充電が行われる。充電電流値が設定電流(I1)を越えて大きくなった場合には太陽電池充電回路スイッチ8の開動作が行われ、鉛蓄電池13の電池電圧が第2の設定電圧(V2)に低下するまで太陽電池充電回路スイッチ8は開状態が維持される。 Here, when the battery voltage of the lead storage battery 13 reaches the first set voltage (V 1 ), when the charge current of the lead storage battery is equal to or less than the preset set current (I 1 ), the solar battery charging circuit switch 8 The lead storage battery 13 is continuously charged without performing the opening operation. Opening operation of the solar cell charging circuit switch 8 is performed when the charging current value is larger exceeds the set current (I 1), drops to the battery voltage of the lead-acid battery 13 is a second set voltage (V 2) Until then, the solar battery charging circuit switch 8 is kept open.

この設定電流(I1)は鉛蓄電池として制御弁式鉛蓄電池を使用する場合には、この制御弁式鉛蓄電池の密閉反応効率が100%である電流値とすることが好ましい。このような設定によれば、鉛蓄電池の液減りを最小限に抑制することができる。 When the control valve type lead storage battery is used as the lead storage battery, the set current (I 1 ) is preferably set to a current value at which the sealing reaction efficiency of the control valve type lead storage battery is 100%. According to such setting, it is possible to minimize the decrease in liquid of the lead storage battery.

このような本発明の構成によれば液減りすることのない、設定電流値(I1)による充電が電池電圧が第1の設定電圧(V1)に到達した後も継続することにより、従来方法に比較して蓄電池をより満充電状態とすることができ、その結果として蓄電池の充放電サイクル寿命を長くすることができる。 According to the configuration of the present invention as described above, the charging with the set current value (I 1 ) that does not reduce the liquid continues even after the battery voltage reaches the first set voltage (V 1 ). Compared to the method, the storage battery can be more fully charged, and as a result, the charge / discharge cycle life of the storage battery can be extended.

本発明による電源システムAは本発明の充電制御装置1,太陽電池パネル11および蓄電池13で構成される。この電源システムAにおいて、光センサ18で太陽電池パネル11の近傍の照度がある設定値以下になると蓄電池切替スイッチ19が閉動作し、負荷20に鉛蓄電池13からの電力が供給される。   The power supply system A according to the present invention includes the charge control device 1, the solar battery panel 11 and the storage battery 13 according to the present invention. In this power supply system A, when the illuminance in the vicinity of the solar battery panel 11 becomes a certain set value or less by the optical sensor 18, the storage battery changeover switch 19 is closed, and the power from the lead storage battery 13 is supplied to the load 20.

また、鉛蓄電池が熱逸走等により異常に高温となった場合には温度計測用センサ21によってこれを検知して鉛蓄電池から充電回路を開放したり、この温度計測用センサ21からの温度情報にもとづいて第1の設定電圧(V1)に温度傾斜をもたせれば、鉛蓄電池13周囲の雰囲気温度が変動しても過充電や充電不足を抑制することができる。 Further, when the lead storage battery becomes abnormally hot due to thermal escape or the like, the temperature measurement sensor 21 detects this and opens the charging circuit from the lead storage battery, or the temperature information from the temperature measurement sensor 21 is displayed. Basically, if the first set voltage (V 1 ) is given a temperature gradient, overcharging and insufficient charging can be suppressed even if the ambient temperature around the lead storage battery 13 fluctuates.

図1に示した充電制御装置1にかえて図2に示す充電制御装置1aを用いることができる。充電制御装置1aは制御部分にCPUを使用しないで論理回路を構成したもので、図2は本発明の充電制御装置1aとそれを用いた電源システムBを示すブロック図である。   A charging control device 1a shown in FIG. 2 can be used instead of the charging control device 1 shown in FIG. The charge control device 1a is a logic circuit configured without using a CPU in the control portion, and FIG. 2 is a block diagram showing the charge control device 1a of the present invention and a power supply system B using the same.

図2に示した充電制御装置1aと電源システムBは電流検出部22で半固定抵抗等で設定された設定電流値(I1)以上で、かつ蓄電池の電圧検出部23で半固定抵抗等で設定された第1の設定電圧(V1)以上であれば論理回路24,25,出力制御部26でFETスイッチ等の太陽電池充電回路スイッチ8を開放する。一度開放された太陽電池充電回路スイッチ8は出力制御部26で保持され電圧検出部23で第2の設定電圧(V2)以下になると出力制御部26をリセットし、太陽電池充電回路スイッチ8を閉じて太陽電池パネル11から再充電を行う。なお、温度検出部27で設定された温度以上の場合は、出力制御部26で太陽電池充電回路スイッチ8を開放して充電を行わない。 The charge control device 1a and the power supply system B shown in FIG. 2 are equal to or higher than the set current value (I 1 ) set by the current detection unit 22 with a semi-fixed resistor, etc. If it is equal to or higher than the set first set voltage (V 1 ), the logic circuits 24 and 25 and the output control unit 26 open the solar battery charging circuit switch 8 such as an FET switch. Once opened, the solar battery charging circuit switch 8 is held by the output control unit 26, and when the voltage detection unit 23 falls below the second set voltage (V 2 ), the output control unit 26 is reset, and the solar cell charging circuit switch 8 is turned on. Close and recharge from the solar panel 11. When the temperature is higher than the temperature set by the temperature detector 27, the output controller 26 opens the solar battery charging circuit switch 8 and does not charge.

充電制御装置1aは前記した充電制御装置1と同様の動作を行う。本発明の充電制御装置1,1aは前記した充電制御を行う機能を備えていればよいので図1および図2に示した例に限定されるものではない。   The charge control device 1a performs the same operation as the charge control device 1 described above. The charge control devices 1 and 1a of the present invention are not limited to the examples shown in FIGS. 1 and 2 as long as they have the function of performing the charge control described above.

図1,図2および前記に示した本発明の実施の形態による本発明例の電源システムA,Bおよび比較例の電源システムを構成して動作させ、蓄電池の容量推移を比較した。   The power supply systems A and B of the present invention according to the embodiment of the present invention shown in FIGS. 1 and 2 and the power supply system of the comparative example are configured and operated, and the capacity transitions of the storage batteries are compared.

本発明例および比較例の各電源システムは定格出力20Wの太陽電池パネルを4枚並列接続したものを用いている。このパネルの晴天時の出力電流は6Aである。鉛蓄電池は公称電圧2V,定格容量150Ahの制御弁式鉛蓄電池の直列接続で12V構成とした。   Each power supply system of the present invention example and the comparative example uses four solar cell panels with a rated output of 20 W connected in parallel. The output current of this panel in fine weather is 6A. The lead storage battery was configured to have a 12V configuration by connecting in series a control valve type lead storage battery having a nominal voltage of 2V and a rated capacity of 150Ah.

本発明例および比較例ともに光センサ18で一定の照度以下になると蓄電池切替スイッチ19を閉じて負荷20に直流電流を供給する。負荷20は鉛蓄電池13から約2Aの放電電流が流れる構成とした。照度が低く、蓄電池切替スイッチ19が閉じる時間を10時間と設定すると一晩に約20Ahの電気量が流れることになる。その他制御装置本体の電源や負荷20の制御等に常時0.1A程度の放電電流が流れる構成とした。   In both the present invention example and the comparative example, when the optical sensor 18 is below a certain illuminance, the storage battery switch 19 is closed and a direct current is supplied to the load 20. The load 20 has a configuration in which a discharge current of about 2 A flows from the lead storage battery 13. If the illuminance is low and the time for closing the storage battery switch 19 is set to 10 hours, an amount of electricity of about 20 Ah flows overnight. In addition, a configuration in which a discharge current of about 0.1 A always flows to the power source of the control device main body, the control of the load 20, and the like.

本発明例の電源システムAは図1に示した構成を備えて、第1の設定電圧(V1)を蓄電池温度が50℃時に14.4V、−10℃時に16.0Vとなるよう直線的な温度傾斜制御を行うように設定したものであり、本発明例の電源システムBは図2に示した構成で
温度にかかわらず15.5V一定としたものである。
The power supply system A of the present invention has the configuration shown in FIG. 1, and the first set voltage (V 1 ) is linear so that the storage battery temperature is 14.4 V at 50 ° C. and 16.0 V at −10 ° C. The power supply system B according to the present invention is set to a constant 15.5 V regardless of the temperature in the configuration shown in FIG.

また本発明例の電源システムAにおいては蓄電池温度が50℃以上の時は異常とみなして太陽電池充電回路スイッチ8を開放するようにプログラム設定した。充電回路を開放後再充電する第2の設定電圧(V2)は本発明例の電源システムA,Bおよび比較例において13.2Vとした。比較例の構成は充電電流に関係なく、蓄電池電圧が第1の設定電圧(V1)に到達すれば太陽電池充電回路スイッチ8を開放し、第2の設定電圧(V2)まで低下すると再度太陽電池充電回路スイッチ8を閉じる制御を行う。 Further, in the power supply system A of the present invention example, when the storage battery temperature is 50 ° C. or higher, it is regarded as abnormal and the program is set so that the solar battery charging circuit switch 8 is opened. The second set voltage (V 2 ) for recharging after opening the charging circuit was set to 13.2 V in the power supply systems A and B of the present invention and the comparative example. Regardless of the charging current, the configuration of the comparative example opens the solar battery charging circuit switch 8 when the storage battery voltage reaches the first set voltage (V 1 ), and again when the voltage drops to the second set voltage (V 2 ). Control to close the solar battery charging circuit switch 8 is performed.

本発明例の電源システムA,Bにおいては前記した比較例の構成に加えて設定電流(I1)を0.03CAに設定し、この設定電流(I1)以下の充電電流の場合には蓄電池電圧がV1以上に上昇しても太陽電池充電回路スイッチ8を閉じないで充電を継続するようにプログラム設定したものである。この設定電流(I1)は制御弁式鉛蓄電池の密閉反応効率が100%となる領域で設定される。 In the power supply systems A and B of the present invention, in addition to the configuration of the comparative example described above, the set current (I 1 ) is set to 0.03 CA, and in the case of a charging current less than this set current (I 1 ), the storage battery Even if the voltage rises to V 1 or more, the program is set so that charging is continued without closing the solar battery charging circuit switch 8. This set current (I 1 ) is set in a region where the sealing reaction efficiency of the control valve type lead storage battery is 100%.

この比較例による電源システムと本発明例による電源システムA,Bについて同一環境に設置して2ヶ月に一度0.1CAの放電電流で1.8V/セルまで放電して容量確認をした時の初期容量に対する容量変化の推移を図3に示す。   When the power supply system according to this comparative example and the power supply systems A and B according to the present invention are installed in the same environment and discharged to 1.8 V / cell with a discharge current of 0.1 CA once every two months, the initial stage when capacity is confirmed The transition of the capacity change with respect to the capacity is shown in FIG.

図3の結果から明らかなように比較例の電源システムでは明らかに充電不足サイクルによると考えられる直線的な容量低下現象が出ているが、本発明による電源システムではまた殆ど容量低下傾向が出ておらず、充電不足にいたることなく、適正な充電が行われることがわかる。   As apparent from the results of FIG. 3, the power supply system of the comparative example has a linear capacity decrease phenomenon that is apparently caused by the insufficient charge cycle. However, the power supply system according to the present invention also has a tendency of capacity decrease. It can be seen that proper charging is performed without charging shortage.

以上のように本発明による電源システムは太陽電池から蓄電池に適正な充電制御を行うことによって、従来発生していた充電不足による蓄電池容量の低下を抑制することができる。さらに充電電気量の積算制御を行う必要がないので、制御装置の構成を従来法よりシンプルでかつ高い信頼性を得ることができるという効果を奏するものである。   As described above, the power supply system according to the present invention can suppress a decrease in storage battery capacity due to insufficient charging, which has occurred in the past, by performing appropriate charge control from the solar battery to the storage battery. Furthermore, since it is not necessary to perform integrated control of the amount of charged electricity, the configuration of the control device is simpler than that of the conventional method, and there is an effect that high reliability can be obtained.

1,1a 充電制御装置
2 CPU
3 プログラムROM
4 RAM
5 SRAM
6 入力部
7 表示部
8 太陽電池充電回路スイッチ
9 出力部
10 A/Dコンバータ
11 太陽電池パネル
12 逆流防止用整流素子
13 鉛蓄電池
14 DC/DCコンバータ
15 シャント抵抗
16 マルチプレクサ
17 総電圧計測端子
18 光センサ
19 蓄電池切替スイッチ
20 負荷
21 温度計測用センサ
22 電流検出部
23 電圧検出部
24,25 論理回路
26 出力制御部
27 温度検出部
A,B 電源システム
1, 1a Charge control device 2 CPU
3 Program ROM
4 RAM
5 SRAM
6 Input unit 7 Display unit 8 Solar cell charging circuit switch 9 Output unit 10 A / D converter 11 Solar cell panel 12 Backflow preventing rectifier 13 Lead storage battery 14 DC / DC converter 15 Shunt resistor 16 Multiplexer 17 Total voltage measurement terminal 18 Light Sensor 19 Storage battery changeover switch 20 Load 21 Temperature measurement sensor 22 Current detection unit 23 Voltage detection unit 24, 25 Logic circuit 26 Output control unit 27 Temperature detection unit A, B Power supply system

Claims (3)

太陽電池と、鉛蓄電池と、太陽電池の出力により鉛蓄電池を充電する充電制御装置と、光センサとからなる電源システムであって、前記充電制御装置は、充電時の蓄電池電圧が第1の設定電圧まで上昇すると充電回路を開放し、前記蓄電池電圧が前記第1の設定電圧よりも低い第2の設定電圧まで低下すると再度充電回路を閉じて充電を行う機能を備えるとともに、前記鉛蓄電池の充電電流が設定電流以下の場合は前記第1の設定電圧以上に蓄電池電圧が上昇しても充電回路を開放しないで充電を継続するようにしており、かつ前記光センサが計測する照度が設定値以下になると、前記鉛蓄電池から負荷に電力が供給されるようにしたことを特徴とする電源システム。   A power supply system comprising a solar battery, a lead storage battery, a charge control device for charging the lead storage battery by the output of the solar cell, and an optical sensor, wherein the charge control device has a storage battery voltage at the time of first setting. When the voltage rises, the charging circuit is opened, and when the storage battery voltage falls to a second setting voltage lower than the first setting voltage, the charging circuit is closed again to perform charging, and the lead storage battery is charged. When the current is less than the set current, charging is continued without opening the charging circuit even if the storage battery voltage rises above the first set voltage, and the illuminance measured by the photosensor is less than the set value Then, power is supplied from the lead storage battery to the load. 前記充電制御装置は、充電時の蓄電池電圧が前記第1の設定電圧まで上昇すると充電回路を開放し、前記蓄電池電圧が前記第2の設定電圧まで低下すると再度充電回路を閉じて充電を行う制御を繰り返すことを特徴とする請求項1に記載の電源システム。   The charging control device opens the charging circuit when the storage battery voltage at the time of charging rises to the first set voltage, and performs charging by closing the charging circuit again when the storage battery voltage falls to the second set voltage. The power supply system according to claim 1, wherein: 前記鉛蓄電池は制御弁式鉛蓄電池であり前記設定電流は前記制御弁式鉛蓄電池の密閉反応効率以下であることを特徴とする請求項1に記載の電源システム。   The power supply system according to claim 1, wherein the lead storage battery is a control valve type lead storage battery, and the set current is equal to or less than a sealed reaction efficiency of the control valve type lead storage battery.
JP2009283705A 2009-12-15 2009-12-15 Power supply system Withdrawn JP2010063359A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100998893B1 (en) 2010-08-05 2010-12-07 주식회사 디케이이앤씨 Short-time current charging method and automatic warning system thereof
JP2013070558A (en) * 2011-09-26 2013-04-18 Panasonic Corp Independency power supply using container
WO2013069346A1 (en) 2011-11-08 2013-05-16 新神戸電機株式会社 Battery-state monitoring system
JP2015126676A (en) * 2013-12-27 2015-07-06 大和ハウス工業株式会社 Storage battery system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100998893B1 (en) 2010-08-05 2010-12-07 주식회사 디케이이앤씨 Short-time current charging method and automatic warning system thereof
JP2013070558A (en) * 2011-09-26 2013-04-18 Panasonic Corp Independency power supply using container
WO2013069346A1 (en) 2011-11-08 2013-05-16 新神戸電機株式会社 Battery-state monitoring system
WO2013069423A1 (en) 2011-11-08 2013-05-16 新神戸電機株式会社 Battery-state monitoring system
US9297859B2 (en) 2011-11-08 2016-03-29 Hitachi Chemical Company, Ltd. Battery-state monitoring system
US9453885B2 (en) 2011-11-08 2016-09-27 Shin-Kobe Electric Machinery Co., Ltd. Battery-state monitoring system
US9459323B2 (en) 2011-11-08 2016-10-04 Hitachi Chemical Company, Ltd. Battery-state monitoring system
JP2015126676A (en) * 2013-12-27 2015-07-06 大和ハウス工業株式会社 Storage battery system

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