JP2002058167A - Method for monitoring charged amount, and charging and discharging apparatus - Google Patents

Method for monitoring charged amount, and charging and discharging apparatus

Info

Publication number
JP2002058167A
JP2002058167A JP2000244790A JP2000244790A JP2002058167A JP 2002058167 A JP2002058167 A JP 2002058167A JP 2000244790 A JP2000244790 A JP 2000244790A JP 2000244790 A JP2000244790 A JP 2000244790A JP 2002058167 A JP2002058167 A JP 2002058167A
Authority
JP
Japan
Prior art keywords
storage battery
charge
layer capacitor
double layer
charging
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
Application number
JP2000244790A
Other languages
Japanese (ja)
Inventor
Takashi Nakazawa
孝志 中澤
Junichi Oga
順一 大賀
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SONODA KEIKI KOGYO KK
Kansai Electric Power Co Inc
Original Assignee
SONODA KEIKI KOGYO KK
Kansai Electric Power Co Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SONODA KEIKI KOGYO KK, Kansai Electric Power Co Inc filed Critical SONODA KEIKI KOGYO KK
Priority to JP2000244790A priority Critical patent/JP2002058167A/en
Publication of JP2002058167A publication Critical patent/JP2002058167A/en
Pending legal-status Critical Current

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
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Landscapes

  • Secondary Cells (AREA)
  • Tests Of Electric Status Of Batteries (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a new method for monitoring the charged amount, which enables to grasp and monitor the charged amount of a storage battery with accuracy, and a new charging and discharging apparatus capable of automatically controlling charging and discharging of a storage battery with accuracy. SOLUTION: In the method for monitoring the charged amount, the charged amount of a storage battery is monitored by measuring the terminal voltage of an electric double layer capacitor connected with the storage battery in series.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】この出願の発明は、充電量監
視方法および充放電装置に関するものである。さらに詳
しくは、この出願の発明は、蓄電池の充電量を簡易、且
つ正確に把握・監視することのできる新しい充電量監視
方法、および蓄電池の充放電を簡易、且つ正確に自動制
御することのできる新しい充放電装置に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charged amount monitoring method and a charge / discharge device. More specifically, the invention of this application is a new charge amount monitoring method that can easily and accurately grasp and monitor the charge amount of a storage battery, and can easily and accurately automatically control the charge and discharge of the storage battery. It relates to a new charging / discharging device.

【０００２】[0002]

【従来の技術】従来より、蓄電池の充電量を監視する方
法としては、蓄電池の端子電圧を測定し、その電圧測定
値を用いて充電量を把握・監視するものが知られてい
る。2. Description of the Related Art Conventionally, as a method of monitoring the charge amount of a storage battery, a method of measuring a terminal voltage of the storage battery and grasping and monitoring the charge amount using the measured voltage value is known.

【０００３】たとえば図５は、この従来の充電量監視方
法を実現する回路構成を例示したものである。この回路
構成では、蓄電池（１）に並列接続された電圧計Ｖによ
り蓄電池（１）の端子電圧を測定し、その電圧測定値を
用いて充電量を監視するとともに、電圧測定値に従って
スイッチＳＷ１およびＳＷ２の開閉を制御することで蓄
電池（１）の充放電を自動制御するようになっている。
これにより過充電および過放電が防止されている。した
がって、このような図５の回路構成は、蓄電池（１）の
端子電圧に従って蓄電池（１）の充放電を自動制御する
従来の充放電装置ともなっている。[0005] For example, FIG. 5 illustrates a circuit configuration for realizing this conventional charge amount monitoring method. In this circuit configuration, the terminal voltage of the storage battery (1) is measured by a voltmeter V connected in parallel to the storage battery (1), and the charge amount is monitored using the measured voltage value. The charge and discharge of the storage battery (1) is automatically controlled by controlling the opening and closing of SW2.
This prevents overcharging and overdischarging. Therefore, the circuit configuration of FIG. 5 is also a conventional charge / discharge device that automatically controls the charge / discharge of the storage battery (1) according to the terminal voltage of the storage battery (1).

【０００４】[0004]

【発明が解決しようとする課題】しかしながら、上記の
とおりの従来の充電量監視方法および充放電装置には解
決すべき問題点があった。通常、蓄電池（１）の充電量
と端子電圧との関係は非線形であり、且つ温度に依存す
る。たとえば、蓄電池（１）が同一の電荷量を放電した
としても、放電電流つまり負荷電流が大きくなれば、蓄
電池（１）の端子電圧は小さくなり、また、温度が低く
なれば、端子電圧が小さくなってしまう。このため、蓄
電池（１）の端子電圧の測定値では、正確に蓄電池
（１）の充電量を正確に把握し、充電状態を監視するこ
とは困難であり、またその測定値に従って蓄電池（１）
の充放電制御を精度良く行うことも困難であった。However, the conventional charge amount monitoring method and the charge / discharge device as described above have problems to be solved. Usually, the relationship between the charge amount of the storage battery (1) and the terminal voltage is non-linear and depends on the temperature. For example, even if the storage battery (1) discharges the same amount of charge, the terminal voltage of the storage battery (1) decreases as the discharge current, that is, the load current increases, and the terminal voltage decreases as the temperature decreases. turn into. For this reason, it is difficult to accurately grasp the charge amount of the storage battery (1) and monitor the state of charge with the measured value of the terminal voltage of the storage battery (1), and the storage battery (1) according to the measured value.
It was also difficult to accurately control the charge and discharge of.

【０００５】この出願の発明は、以上のとおりの事情に
鑑みてなされたものであり、従来技術の問題点を解消
し、蓄電池の充電量を簡易、且つ正確に把握・監視する
ことのできる新しい充電量監視方法、および蓄電池の充
放電を簡易、且つ正確に自動制御することのできる新し
い充放電装置を提供することを課題としている。[0005] The invention of this application has been made in view of the circumstances described above, and solves the problems of the prior art, and provides a new and easy-to-understand and monitor charge amount of a storage battery. An object of the present invention is to provide a charge amount monitoring method and a new charge / discharge device capable of easily and accurately automatically controlling charge / discharge of a storage battery.

【０００６】[0006]

【課題を解決する手段】この出願の発明は、上記の課題
を解決するものとして、蓄電池に直列接続された電気二
重層キャパシタの端子電圧を測定することにより蓄電池
の充電量を監視することを特徴とする充電量監視方法
（請求項１）を提供する。The present invention solves the above-mentioned problem by monitoring the charge amount of the storage battery by measuring a terminal voltage of an electric double layer capacitor connected in series to the storage battery. (Claim 1) is provided.

【０００７】また、この出願の発明は、蓄電池に直列接
続された電気二重層キャパシタを有し、この電気二重層
キャパシタの端子電圧に従って蓄電池の充放電が制御可
能とされていることを特徴とする充放電装置をも提供
し、この充放電装置において、電気二重層キャパシタの
端子電圧が所定値以上である場合に蓄電池への充電が停
止され、所定値以下である場合に蓄電池からの放電が停
止されること（請求項３）をその態様として提供する。Further, the invention of this application is characterized in that it has an electric double layer capacitor connected in series to the storage battery, and the charging and discharging of the storage battery can be controlled according to the terminal voltage of the electric double layer capacitor. Also provided is a charging / discharging device, in which charging of the storage battery is stopped when the terminal voltage of the electric double layer capacitor is equal to or higher than a predetermined value, and discharging from the storage battery is stopped when the terminal voltage is equal to or lower than the predetermined value. (Claim 3) is provided as an embodiment thereof.

【０００８】[0008]

【発明の実施の形態】この出願の発明は、電気二重層キ
ャパシタ（電気二重層コンデンサとも呼ぶ）を蓄電池に
直列接続し、この電気二重層キャパシタの端子電圧を用
いて蓄電池の充電量の監視、さらには蓄電池の充放電制
御を行うことを大きな特徴としている。すなわち、通常
の蓄電池とそれに直列接続した電気二重層キャパシタと
からなるいわゆるハイブリッドシステムを構成して、蓄
電池の正確な充電量監視ならびに充放電制御を実現しめ
ているのである。DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention of this application is to connect an electric double layer capacitor (also referred to as an electric double layer capacitor) to a storage battery in series and monitor the charge amount of the storage battery by using the terminal voltage of the electric double layer capacitor. Further, it is characterized by performing charge / discharge control of the storage battery. That is, a so-called hybrid system composed of a normal storage battery and an electric double layer capacitor connected in series with the storage battery is configured to realize accurate charge amount monitoring and charge / discharge control of the storage battery.

【０００９】ここで、蓄電池に直列接続するキャパシタ
として電気二重層キャパシタを用いるのは、電気二重層
キャパシタが蓄電池に蓄積される電荷量と同等の電荷を
蓄電できるからである。これにより、蓄電池と電気二重
層キャパシタとの間にＱ＝ＣＶ（Ｑ：通過電機量
［ｑ］、Ｃ：キャパシタ容量［Ｆ］、Ｖ：キャパシタ電
圧［Ｖ］）の関係が成立するので、電気二重層キャパシ
タの端子電圧の測定値によって、蓄電池の充電量、つま
り充電された電荷量を正確に把握し監視することができ
るようになる。そして、その電圧測定値に従ってたとえ
ばスイッチングを行えば、蓄電池の充放電を正確に自動
制御でき、的確な過充電防止・過放電防止を実現でき
る。The reason why the electric double layer capacitor is used as the capacitor connected in series to the storage battery is that the electric double layer capacitor can store electric charge equivalent to the amount of electric charge stored in the storage battery. Accordingly, a relationship of Q = CV (Q: passing electric quantity [q], C: capacitor capacity [F], V: capacitor voltage [V]) is established between the storage battery and the electric double layer capacitor. The measured value of the terminal voltage of the double-layer capacitor makes it possible to accurately grasp and monitor the charge amount of the storage battery, that is, the charged charge amount. If, for example, switching is performed according to the measured voltage value, charging and discharging of the storage battery can be accurately and automatically controlled, and accurate overcharge prevention and overdischarge prevention can be realized.

【００１０】図１は、このようなこの発明の実施の形態
の一例を示した回路構成である。この図１に示した例で
は、蓄電池（１）に電気二重層キャパシタ（２）が直列
接続されており、電気二重層キャパシタ（２）に並列接
続された電圧計Ｖによって端子電圧が測定される。そし
て、その測定値に従って制御回路部ＣＢによりスイッチ
ＳＷ１およびＳＷ２の開閉が自動制御される。このと
き、たとえば、測定値が所定値以上である場合にはスイ
ッチＳＷ１が開放されて、電源から蓄電池（１）への充
電が停止され、その逆に所定値以下である場合にはスイ
ッチＳＷ２が開放されて、蓄電池（１）から負荷への放
電が停止されるような制御が行われる。これにより過充
電・過放電が防止される。FIG. 1 is a circuit diagram showing an example of such an embodiment of the present invention. In the example shown in FIG. 1, an electric double layer capacitor (2) is connected in series to a storage battery (1), and a terminal voltage is measured by a voltmeter V connected in parallel to the electric double layer capacitor (2). . Then, the opening and closing of the switches SW1 and SW2 are automatically controlled by the control circuit unit CB according to the measured values. At this time, for example, when the measured value is equal to or greater than a predetermined value, the switch SW1 is opened, and charging of the storage battery (1) from the power supply is stopped. Control is performed such that the battery is opened and the discharge from the storage battery (1) to the load is stopped. This prevents overcharge and overdischarge.

【００１１】この出願の発明は、以上のとおりの特徴を
有するものであるが、以下に、添付した図面に沿って実
施例を示し、さらに詳しくこの発明の実施の態様につい
て説明する。The invention of this application has the features as described above. Hereinafter, embodiments will be described with reference to the accompanying drawings, and embodiments of the invention will be described in more detail.

【００１２】[0012]

【実施例】［実施例１］図２は、太陽光発電システムに
適用した場合のこの発明の一実施例を示したものであ
る。この図２に示した例では、太陽電池（３）が蓄電池
（１）への充電電源となっている。その他の構成は上述
の図１に例示した回路構成と同じである。この場合、た
とえば、電圧計Ｖを１Ｖ程度に設定すると、太陽電池
（１）からの電力を有効に蓄電池（１）に蓄えることが
できるとともに、急速充電を緩和でき、蓄電池（１）の
長寿命化をも図ることができる。Embodiment 1 FIG. 2 shows an embodiment of the present invention when applied to a photovoltaic power generation system. In the example shown in FIG. 2, the solar battery (3) is a charging power source for the storage battery (1). Other configurations are the same as the circuit configuration illustrated in FIG. 1 described above. In this case, for example, when the voltmeter V is set to about 1 V, the power from the solar cell (1) can be effectively stored in the storage battery (1), and the rapid charging can be eased, and the long life of the storage battery (1) can be reduced. Can also be achieved.

【００１３】［実施例２］図３は、ロードレベリング用
蓄電装置に適用した場合のこの発明の一実施例を示した
ものである。この図３に示した例では、スイッチＳＷ３
が閉じた充電時にはコンバータとして機能し、スイッチ
ＳＷ３が開いた放電時にはインバータとして機能するロ
ードレベリング手段（４）が電源端子間に接続されてい
る。この場合、たとえば一般に蓄電池（１）の電圧は電
気二重層キャパシタ（２）の電圧と比べて十分に高いの
で、電圧の高い電気二重層キャパシタ（２）を用いるこ
とができる。Embodiment 2 FIG. 3 shows an embodiment of the present invention when applied to a power storage device for load leveling. In the example shown in FIG. 3, the switch SW3
The load leveling means (4), which functions as a converter when charging is closed and functions as an inverter when discharging when the switch SW3 is opened, is connected between the power supply terminals. In this case, for example, since the voltage of the storage battery (1) is generally sufficiently higher than the voltage of the electric double layer capacitor (2), the electric double layer capacitor (2) having a higher voltage can be used.

【００１４】［実施例３］図４は、この発明における蓄
電池および電気二重層キャパシタの充電特性を例示した
図である。この図４から明らかなように、電気二重層キ
ャパシタの端子電圧の測定値は蓄電池の端子電圧の測定
値と比例しており、極めて正確な充電状態の監視が可能
であることがわかる。[Embodiment 3] FIG. 4 is a diagram illustrating charging characteristics of a storage battery and an electric double layer capacitor according to the present invention. As is apparent from FIG. 4, the measured value of the terminal voltage of the electric double layer capacitor is proportional to the measured value of the terminal voltage of the storage battery, and it can be seen that the state of charge can be monitored very accurately.

【００１５】もちろん、この発明は以上の例に限定され
るものではなく、細部については様々な態様が可能であ
る。Of course, the present invention is not limited to the above-described example, and various embodiments are possible in detail.

【００１６】[0016]

【発明の効果】以上詳しく説明した通り、この出願の発
明によって、蓄電池の充電量を簡易、且つ正確に把握・
監視することができ、また、蓄電池の充放電を簡易、且
つ正確に自動制御することができるようになる。As described above in detail, according to the invention of this application, the amount of charge of the storage battery can be easily and accurately grasped / acquired.
It is possible to monitor and charge / discharge of the storage battery can be simply and accurately automatically controlled.

【図面の簡単な説明】[Brief description of the drawings]

【図１】この発明の充電量監視方法および充放電装置の
回路構成の一例を示した図である。FIG. 1 is a diagram showing an example of a circuit configuration of a charge amount monitoring method and a charge / discharge device of the present invention.

【図２】太陽光発電システムに適用した場合のこの発明
の一実施例を示した図である。FIG. 2 is a diagram showing one embodiment of the present invention when applied to a solar power generation system.

【図３】ロードレベリング用蓄電装置に適用した場合の
この発明の実施一例を示した図である。FIG. 3 is a diagram showing an embodiment of the present invention when applied to a power storage device for load leveling.

【図４】この発明における蓄電池および電気二重層キャ
パシタの充電特性を例示した図である。FIG. 4 is a diagram illustrating charging characteristics of a storage battery and an electric double layer capacitor according to the present invention.

【図５】従来の充電量監視方法および充放電装置の回路
構成の一例を示した図である。FIG. 5 is a diagram showing an example of a circuit configuration of a conventional charge amount monitoring method and a charge / discharge device.

【符号の説明】[Explanation of symbols]

１ 蓄電池 ２ 電気二重層コンデンサ ３ 太陽電池 ４ ロードレベリング手段 Ｖ 電圧計 ＳＷ１，ＳＷ２，ＳＷ３ スイッチ ＣＢ 制御回路部 DESCRIPTION OF SYMBOLS 1 Storage battery 2 Electric double layer capacitor 3 Solar cell 4 Load leveling means V Voltmeter SW1, SW2, SW3 Switch CB Control circuit part

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｈ０２Ｊ 7/10 Ｈ０２Ｊ 7/10 Ｂ (72)発明者 大賀 順一 兵庫県尼崎市若王寺３丁目12番15号 園田 計器工業株式会社内 Ｆターム(参考） 2G016 CB12 CC01 CC07 CC12 CD00 CD10 5G003 AA01 BA01 CA14 CC02 EA02 5H030 AS20 BB01 BB21 FF41 ──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) H02J 7/10 H02J 7/10 B (72) Inventor Junichi Oga 3-12-15 Wakaoji Temple, Amagasaki City, Hyogo Prefecture No. Sonoda Keiki Kogyo Co., Ltd. F-term (reference) 2G016 CB12 CC01 CC07 CC12 CD00 CD10 5G003 AA01 BA01 CA14 CC02 EA02 5H030 AS20 BB01 BB21 FF41

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 蓄電池に直列接続された電気二重層キャ
パシタの端子電圧を測定することにより蓄電池の充電量
を監視することを特徴とする充電量監視方法。1. A charge amount monitoring method comprising: monitoring a charge amount of a storage battery by measuring a terminal voltage of an electric double layer capacitor connected in series to the storage battery. 【請求項２】 蓄電池に直列接続された電気二重層キャ
パシタを有し、この電気二重層キャパシタの端子電圧に
従って蓄電池の充放電が制御可能とされていることを特
徴とする充放電装置。2. A charge / discharge device comprising an electric double layer capacitor connected in series to a storage battery, wherein charging and discharging of the storage battery can be controlled in accordance with a terminal voltage of the electric double layer capacitor. 【請求項３】 電気二重層キャパシタの端子電圧が所定
値以上である場合に蓄電池への充電が停止され、所定値
以下である場合に蓄電池からの放電が停止されることを
特徴とする請求項２の充放電装置。3. The method according to claim 1, wherein the charging of the storage battery is stopped when the terminal voltage of the electric double layer capacitor is higher than a predetermined value, and the discharging from the storage battery is stopped when the terminal voltage is lower than the predetermined value. 2. Charge / discharge device.
JP2000244790A 2000-08-11 2000-08-11 Method for monitoring charged amount, and charging and discharging apparatus Pending JP2002058167A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2000244790A JP2002058167A (en) 2000-08-11 2000-08-11 Method for monitoring charged amount, and charging and discharging apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000244790A JP2002058167A (en) 2000-08-11 2000-08-11 Method for monitoring charged amount, and charging and discharging apparatus

Publications (1)

Publication Number Publication Date
JP2002058167A true JP2002058167A (en) 2002-02-22

Family

ID=18735425

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000244790A Pending JP2002058167A (en) 2000-08-11 2000-08-11 Method for monitoring charged amount, and charging and discharging apparatus

Country Status (1)

Country Link
JP (1) JP2002058167A (en)

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