JP3107605B2 - Battery charger - Google Patents
Battery chargerInfo
- Publication number
- JP3107605B2 JP3107605B2 JP03248176A JP24817691A JP3107605B2 JP 3107605 B2 JP3107605 B2 JP 3107605B2 JP 03248176 A JP03248176 A JP 03248176A JP 24817691 A JP24817691 A JP 24817691A JP 3107605 B2 JP3107605 B2 JP 3107605B2
- Authority
- JP
- Japan
- Prior art keywords
- terminal voltage
- secondary battery
- charging
- maximum value
- sampling
- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Description
【０００１】[0001]
【産業上の利用分野】本発明はニッケルカドミウム電池
等の二次電池に−ΔＶ検出制御方式で電気を充電する電
池充電装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery charger for charging a secondary battery such as a nickel cadmium battery by using a -.DELTA.V detection control method.
【０００２】[0002]
【従来の技術】従来この種の電池充電装置は二次電池を
充電する際に前記電池の端子電圧を監視し、この端子電
圧が最大値となってから−ΔＶ下がった時点で充電を停
止する−ΔＶ検出制御方式をとっている。ここで前記二
次電池の充電方法を詳述すると、充電時に前記二次電池
の端子電圧を所定の時間間隔でサンプリングし、得られ
た端子電圧が直前にサンプリングした電圧よりも大きい
場合にこれを記憶しておくことにより、前記端子電圧の
最大値を求めた後、更に前記端子電圧の監視を行って前
記最大値から−ΔＶ下がった端子電圧を検出した時点
で、前記電池への充電を停止する。2. Description of the Related Art Conventionally, this type of battery charger monitors the terminal voltage of a battery when charging a secondary battery, and stops charging when the terminal voltage decreases by -.DELTA.V after the terminal voltage reaches a maximum value. -ΔV detection control system is adopted. Here, the charging method of the secondary battery will be described in detail.When charging, the terminal voltage of the secondary battery is sampled at predetermined time intervals, and when the obtained terminal voltage is higher than the voltage sampled immediately before, this is determined. By storing the value, after the maximum value of the terminal voltage is obtained, charging of the battery is stopped when the terminal voltage is further monitored to detect a terminal voltage falling by -ΔV from the maximum value. I do.
【０００３】ところで、上記のような従来の充電方式で
は、安定した充電状態の時には何等問題を生じないが、
電池を使用しながら充電を行う場合、使用動作条件が変
化して消費電流が急に増大したような場合に、前記−Δ
Ｖの誤検出を行ってしまうという欠点があった。[0003] In the conventional charging method as described above, there is no problem at the time of stable charging,
When charging while using a battery, if the operating conditions change and the current consumption suddenly increases, the -Δ
There is a disadvantage that erroneous detection of V is performed.
【０００４】[0004]
【発明が解決しようとする課題】上記の如く従来の−Δ
Ｖ検出制御方式の電池充電装置を用いて電池を充電する
際に、前記電池を使用している場合は、負荷の変動等に
より消費電流が変化して、−ΔＶの誤検出を行うことが
あって、常に適切な充電を行えないという欠点があっ
た。As described above, the conventional -Δ
When charging a battery using a battery charger of the V detection control method, if the battery is used, the current consumption may change due to a change in load or the like, and erroneous detection of -ΔV may be performed. Therefore, there was a drawback that proper charging could not always be performed.
【０００５】そこで本発明は上記の欠点を除去するもの
で、被充電電池を使用しながら充電を行う際に消費電流
の突然の変化があっても−ΔＶの誤検出を防止して、常
に適切な充電を行うことができる電池充電装置を提供す
ることを目的としている。Therefore, the present invention eliminates the above-mentioned drawbacks, and prevents erroneous detection of -ΔV even when there is a sudden change in current consumption when charging while using a battery to be charged. It is an object of the present invention to provide a battery charger capable of performing a proper charging.
【０００６】[0006]
【課題を解決するための手段】本発明は−ΔＶ検出制御
方式にて二次電池に電気を充電する電池充電装置におい
て、当初時間間隔ａにて前記二次電池の端子電圧をサン
プリングするサンプリング手段と、このサンプリング手
段によりサンプリングされた前記端子電圧の最大値を求
める最大値検出手段と、この最大値検出手段により前記
端子電圧の最大値が検出された時点以降前記サンプリン
グ手段のサンプリング間隔を前記ａより短いｂとするサ
ンプリング間隔制御手段と、この時間間隔ｂによるサン
プリングにて得られた前記端子電圧複数個を平均化して
正規の端子電圧とする平均化手段と、この平均化手段に
よって得られた正規の端子電圧が前記最大値検出手段に
よって得られた端子電圧の最大値から−ΔＶ下がった時
点で前記二次電池への充電を完了する充電制御手段とを
具備した構成を有する。SUMMARY OF THE INVENTION The present invention relates to a battery charger for charging a secondary battery with electricity in a -.DELTA.V detection control system, wherein a sampling means for sampling a terminal voltage of the secondary battery at an initial time interval a. A maximum value detecting means for obtaining a maximum value of the terminal voltage sampled by the sampling means; and a sampling interval of the sampling means after the time when the maximum value of the terminal voltage is detected by the maximum value detecting means. Sampling interval control means for setting a shorter b, averaging means for averaging the plurality of terminal voltages obtained by sampling at the time interval b to obtain a normal terminal voltage, and averaging means for obtaining the terminal voltage. When the regular terminal voltage drops by -ΔV from the maximum value of the terminal voltage obtained by the maximum value detecting means, And charge control means for completing the charging of.
【０００７】[0007]
【作用】本発明の電池充電装置において、サンプリング
手段は当初時間間隔ａにて二次電池の端子電圧をサンプ
リングする。最大値検出手段は前記サンプリング手段に
よりサンプリングされた前記端子電圧の最大値を求め
る。サンプリング間隔制御手段は前記最大値検出手段に
より前記端子電圧の最大値が検出された時点以降前記サ
ンプリング手段のサンプリング間隔を前記ａより短いｂ
とする。平均化手段は前記時間間隔ｂによるサンプリン
グにて得られた前記端子電圧複数個を平均化して正規の
端子電圧とする。充電制御手段は前記平均化手段によっ
て得られた正規の端子電圧が前記最大値検出手段によっ
て得られた端子電圧の最大値から−ΔＶ下がった時点で
前記二次電池への充電を完了する。In the battery charger of the present invention, the sampling means samples the terminal voltage of the secondary battery at the initial time interval a. The maximum value detecting means determines a maximum value of the terminal voltage sampled by the sampling means. The sampling interval control means sets the sampling interval of the sampling means to a value shorter than the a after the time when the maximum value of the terminal voltage is detected by the maximum value detection means.
And The averaging means averages the plurality of terminal voltages obtained by sampling at the time interval b to obtain a normal terminal voltage. The charging control means completes charging the secondary battery when the normal terminal voltage obtained by the averaging means falls by -ΔV from the maximum value of the terminal voltage obtained by the maximum value detecting means.
【０００８】[0008]
【実施例】以下、本発明の一実施例を図面を参照して説
明する。図１は本発明の電池充電装置の一実施例を示し
たブロック図である。１は１００Ｖの商用電源、２は前
記商用電源を所定の直流電源に変換するＡＣアダプタ、
３は二次電池４に対する充電電流の増減或いは停止を行
う充電電流制御回路、４は充電される二次電池、５は二
次電池４の端子電圧をデジタル情報に変換するＡ／Ｄ変
換器、６は二次電池４に対する充電を制御するＣＰＵ、
７はＣＰＵ６を動作させるプログラム等を格納している
ＲＯＭ、８はＣＰＵ６の動作に必要なデ−タ等を格納す
るＲＡＭである。An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing one embodiment of the battery charger of the present invention. 1 is a 100V commercial power supply, 2 is an AC adapter for converting the commercial power supply into a predetermined DC power supply,
Reference numeral 3 denotes a charging current control circuit for increasing / decreasing or stopping the charging current for the secondary battery 4, reference numeral 4 denotes a secondary battery to be charged, reference numeral 5 denotes an A / D converter for converting a terminal voltage of the secondary battery 4 into digital information, 6, a CPU for controlling charging of the secondary battery 4;
Reference numeral 7 denotes a ROM that stores a program for operating the CPU 6 and the like, and 8 denotes a RAM that stores data and the like necessary for the operation of the CPU 6.
【０００９】次に本実施例の動作について説明する。電
源を投入すると、ＡＣアダプタ２により商用電源が所定
の電圧の直流電源に変換されて、充電電流制御回路３に
供給される。充電電流制御回路３はＣＰＵ６によりその
充電電流が制御されるが、充電開始当初は所定の電流を
二次電池４に供給する。一方、Ａ／Ｄ変換器５は二次電
池４の端子電圧をデジタル値に変換して、これをＣＰＵ
６に出力する。ＣＰＵ６は図２の時間間隔ａで示される
サンプリング間隔にて前記二次電池４の端子電圧を取り
込み、前回取り込んだ端子電圧と今回のそれとを比較
し、今回取り込んだ端子電圧が大きい場合にはこの値を
ＲＡＭ８に保持する。こうしてＣＰＵ６が二次電池４の
端子電圧を監視し、ある時点で前回取り込んだ二次電池
４の端子電圧よりも今回取り込んだ二次電池４の端子電
圧が小さい場合には、前回取り込んだ端子電圧を充電時
の最大電圧値と認識し、これをＲＡＭ８にそのまま保持
する。Next, the operation of this embodiment will be described. When the power is turned on, the commercial power is converted into a DC power of a predetermined voltage by the AC adapter 2 and supplied to the charging current control circuit 3. The charging current of the charging current control circuit 3 is controlled by the CPU 6, and a predetermined current is supplied to the secondary battery 4 at the beginning of charging. On the other hand, the A / D converter 5 converts the terminal voltage of the secondary battery 4 into a digital value,
6 is output. The CPU 6 captures the terminal voltage of the secondary battery 4 at a sampling interval indicated by the time interval a in FIG. 2, compares the terminal voltage captured last time with that of the current time, and when the terminal voltage captured this time is large, The value is stored in the RAM 8. In this way, the CPU 6 monitors the terminal voltage of the secondary battery 4 and, at a certain point in time, if the terminal voltage of the secondary battery 4 taken in this time is smaller than the terminal voltage of the secondary battery 4 taken in last time, the terminal voltage taken in the last time Is recognized as the maximum voltage value during charging, and this is held in the RAM 8 as it is.
【００１０】ＣＰＵ６は上記の如く二次電池４の端子電
圧の最大値を見つけると、サンプリング間隔をａからｂ
に変更して前記二次電池４の端子電圧の変化を更に監視
する。但し、ｂ＜ａで、ここでは３ｂ＝ａとする。即
ち、ＣＰＵ６は前記ｂ間隔にて二次電池４の端子電圧を
監視し、３回のサンプリングで得た端子電圧を平均化し
て、これを正規の端子電圧とする。こうして、正規の端
子電圧がＲＡＭ８内に格納されている前記最大端子電圧
値から−ΔＶ下がった値になった時点で、ＣＰＵ６は充
電電流制御回路３から二次電池４に供給される電流を絞
るか、或いは停止して、前記二次電池４への充電を完了
する。When the CPU 6 finds the maximum value of the terminal voltage of the secondary battery 4 as described above, it changes the sampling interval from a to b.
And the change in the terminal voltage of the secondary battery 4 is further monitored. However, b <a, and here, 3b = a. That is, the CPU 6 monitors the terminal voltage of the secondary battery 4 at the interval b, averages the terminal voltages obtained by sampling three times, and sets the averaged terminal voltage. Thus, when the normal terminal voltage becomes a value that is −ΔV lower than the maximum terminal voltage value stored in the RAM 8, the CPU 6 reduces the current supplied from the charging current control circuit 3 to the secondary battery 4. Alternatively, the charging of the secondary battery 4 is completed.
【００１１】本実施例によれば、二次電池４の端子電圧
が最大値を超えると、前記端子電圧を監視するサンプリ
ング間隔を小さくし、且つ得られた端子電圧複数個を平
均化して正規の端子電圧とする処理を行うため、前記二
次電池４への充電と共に負荷へ電流を供給していて、前
記負荷の変動により前記二次電池４の端子電圧が変動し
ても、前記端子電圧の平均化により前記端子電圧の一時
的な変動を吸収することができるため、前記負荷変動に
よる−ΔＶの誤検出を無くすことができ、常に二次電池
４を適切に充電することができる。According to the present embodiment, when the terminal voltage of the secondary battery 4 exceeds the maximum value, the sampling interval for monitoring the terminal voltage is reduced, and a plurality of the obtained terminal voltages are averaged to obtain a regular voltage. In order to perform the process of setting the terminal voltage, the current is supplied to the load together with the charging of the secondary battery 4, and even if the terminal voltage of the secondary battery 4 fluctuates due to the load fluctuation, the terminal voltage Since the temporary fluctuation of the terminal voltage can be absorbed by averaging, erroneous detection of -ΔV due to the load fluctuation can be eliminated, and the secondary battery 4 can always be appropriately charged.
【００１２】[0012]
【発明の効果】以上記述した如く本発明の電池充電装置
によれば、被充電電池を使用しながら充電を行う際に消
費電流の突然の変化があっても−ΔＶの誤検出を防止し
て、常に適切な充電を行うことができる。As described above, according to the battery charger of the present invention, even when there is a sudden change in the current consumption when charging while using the battery to be charged, erroneous detection of -ΔV is prevented. , Can always be properly charged.
【図面の簡単な説明】[Brief description of the drawings]
【図１】電池充電装置の一実施例を示したブロック図。FIG. 1 is a block diagram showing an embodiment of a battery charger.
【図２】図１に示した二次電池の端子電圧の上昇過程を
示した図。FIG. 2 is a diagram showing a process of increasing the terminal voltage of the secondary battery shown in FIG.
３…充電電流制御回路 ４…二次電池 ５…Ａ／Ｄ変換器 ６…ＣＰＵ ７…ＲＯＭ ８…ＲＡＭ 3 ... Charge current control circuit 4 ... Secondary battery 5 ... A / D converter 6 ... CPU 7 ... ROM 8 ... RAM
Claims (1)
充電する電池充電装置において、当初時間間隔ａにて前
記二次電池の端子電圧をサンプリングするサンプリング
手段と、このサンプリング手段によりサンプリングされ
た前記端子電圧の最大値を求める最大値検出手段と、こ
の最大値検出手段により前記端子電圧の最大値が検出さ
れた時点以降前記サンプリング手段のサンプリング間隔
を前記ａより短いｂとするサンプリング間隔制御手段
と、この時間間隔ｂによるサンプリングにて得られた前
記端子電圧複数個を平均化して正規の端子電圧とする平
均化手段と、この平均化手段によって得られた正規の端
子電圧が前記最大値検出手段によって得られた端子電圧
の最大値から−ΔＶ下がった時点で前記二次電池への充
電を完了する充電制御手段とを具備したことを特徴とす
る電池充電装置。1. A battery charging apparatus for charging a secondary battery with electricity according to a -.DELTA.V detection control method, comprising: sampling means for sampling a terminal voltage of the secondary battery at an initial time interval a; Maximum value detection means for obtaining the maximum value of the terminal voltage obtained, and a sampling interval for setting the sampling interval of the sampling means to b shorter than the a after the time when the maximum value of the terminal voltage is detected by the maximum value detection means. Control means; averaging means for averaging the plurality of terminal voltages obtained by sampling at the time interval b to obtain a normal terminal voltage; Charge control for completing the charging of the secondary battery at a point in time when the voltage drops by -ΔV from the maximum value of the terminal voltage obtained by the value detecting means. And a battery charger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03248176A JP3107605B2 (en) | 1991-09-27 | 1991-09-27 | Battery charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03248176A JP3107605B2 (en) | 1991-09-27 | 1991-09-27 | Battery charger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0591677A JPH0591677A (en) | 1993-04-09 |
| JP3107605B2 true JP3107605B2 (en) | 2000-11-13 |
Family
ID=17174340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03248176A Expired - Fee Related JP3107605B2 (en) | 1991-09-27 | 1991-09-27 | Battery charger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3107605B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3161272B2 (en) * | 1994-06-03 | 2001-04-25 | 日立工機株式会社 | Battery charger |
| KR100387491B1 (en) * | 2000-12-28 | 2003-06-18 | 현대자동차주식회사 | Method for diagonosising failure of battery in electric vehicle |
| JPWO2010106588A1 (en) * | 2009-03-16 | 2012-09-13 | 新神戸電機株式会社 | Power storage device and electronic circuit device used therefor |
-
1991
- 1991-09-27 JP JP03248176A patent/JP3107605B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0591677A (en) | 1993-04-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |