JPS63213430A - Constant current/voltage charger - Google Patents
Constant current/voltage chargerInfo
- Publication number
- JPS63213430A JPS63213430A JP4502087A JP4502087A JPS63213430A JP S63213430 A JPS63213430 A JP S63213430A JP 4502087 A JP4502087 A JP 4502087A JP 4502087 A JP4502087 A JP 4502087A JP S63213430 A JPS63213430 A JP S63213430A
- Authority
- JP
- Japan
- Prior art keywords
- current
- battery
- power control
- control transistor
- constant
- 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.)
- Granted
Links
- 238000010277 constant-current charging Methods 0.000 claims description 11
- 238000010280 constant potential charging Methods 0.000 claims description 10
- 238000007600 charging Methods 0.000 description 13
- 238000001514 detection method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、鉛蓄電池などの二次電池の充電装置に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a charging device for a secondary battery such as a lead-acid battery.
従来の技術
この種の充電装置は、被充電電池の保護ならびに電源容
量の関係のために、充電初期には定ｆｉｉ流充電するよ
う動作して、充電末期に近づくにつれて自動的に定電圧
充電動作に移行するよう構成されている。BACKGROUND OF THE INVENTION This type of charging device operates to perform constant current charging at the beginning of charging in order to protect the battery to be charged and due to power supply capacity, and automatically switches to constant voltage charging operation as the end of charging approaches. is configured to move to
第３図は従来の定電流・定電圧充電装置を示す。FIG. 3 shows a conventional constant current/constant voltage charging device.
電源１と被充電電池２（以下、電池と称す〕とは電力制
御トランジスタ３と電流検出用の抵抗ＭＩ４を介して接
続されており、第１のｒＩＡ差増幅器５は、演算増幅器
６で電池２の端子電圧の分圧１１Ｅｓｔと基準電圧Ｅ１
１１とを比較し、第２の誤差増幅器７は、演算増幅器８
で前記抵抗器４の端子電圧Ｅｓ２と基準電圧Ｅ１１２と
を比較し、演算増幅器６．８の両川力信号の加輝信号で
トランジスタ９のベース電位を決定し、トランジスタ９
で前記電力制御Ｉ トランジスタ３のベース電流１ｅを
制御している。A power source 1 and a charged battery 2 (hereinafter referred to as a battery) are connected via a power control transistor 3 and a current detection resistor MI4, and a first rIA difference amplifier 5 uses an operational amplifier 6 to connect the battery 2. The divided voltage 11Est of the terminal voltage and the reference voltage E1
11, the second error amplifier 7 is the operational amplifier 8.
The terminal voltage Es2 of the resistor 4 is compared with the reference voltage E112, and the base potential of the transistor 9 is determined by the boosting signal of the Ryokawa power signal of the operational amplifier 6.8.
The power control I controls the base current 1e of the transistor 3.
発明が解決しようとする問題点
このような従来の構成では、回路の構成がＩ！１雑なう
え、電流検出用の抵抗器４の電力損失が大きいため、＠
回の小型化が困難であった。Problems to be Solved by the Invention In such a conventional configuration, the circuit configuration is I! 1. It is complicated and the power loss of the resistor 4 for current detection is large, so @
It was difficult to downsize the unit.
本発明は構成が簡単で、しかも電力損失が小さくて装置
を小型化することができる定電流・定電圧充電＠胃を提
供することを目的とする。An object of the present invention is to provide a constant current/constant voltage charging @stomach which has a simple configuration, has low power loss, and can downsize the device.
問題点を解決するための手段
本発明の定１ｉ流・定電圧充電装置は、電源と被充電電
池の間に直列に電力制御トランジスタを介装し、前記被
充ｒｉ電池の端子電圧を検出する誤差増幅器の出力信号
で前記電力制御トランジスタのベース電位を制ｒｎする
よう構成するとともに、前記電力制御トランジスタのベ
ースと前記ＩＮ！！ｉ差増幅器の出力との間に電流制限
手段を介装したことを特徴とする。Means for Solving the Problems The constant current/constant voltage charging device of the present invention includes a power control transistor interposed in series between the power source and the battery to be charged, and detects the terminal voltage of the battery to be charged. The base potential of the power control transistor is controlled by the output signal of the error amplifier, and the base potential of the power control transistor and the IN! ! The present invention is characterized in that current limiting means is interposed between the output of the i-difference amplifier and the output of the i-difference amplifier.
作用
この偶成によると、電流ｆｌｌＪＷ１手段が電力制御ト
ランジスタのベース電流の雌大−を制限し、電力制御ト
ランジスタのコレクタ電流の最大値を制限して、被充１
％ｉ池への充電電流を定電流制御する。According to this combination, the current fllJW1 means limits the magnitude of the base current of the power control transistor, limits the maximum value of the collector current of the power control transistor, and limits the maximum value of the collector current of the power control transistor.
%i Controls the charging current to the battery at a constant current.
実施例
以下、本発明の実施例を第１図と第２図に基づいて説明
する。Embodiments Hereinafter, embodiments of the present invention will be explained based on FIGS. 1 and 2.
第１図は本発明の充電装置を示す。電源１と被充電電池
２の間に直列に電力１ＩｉＩＪｉＩｌトランジスタ３を
介装し、電池２の端子電圧を検出する誤差増幅器５の出
力と、電力制御トランジスタ３のベースとの間に電流制
限回路１Ｇを介装して構成されている。前記誤差増幅器
５は、電池２の端子電圧を分圧する抵抗器１１．１２と
、基準電圧源１３と、この基準電圧源１３から出力する
基準電圧ＥＲ１と、抵抗器１２の端子電圧Ｅｓ１とを比
較する演算増幅器６とで構成されている。電流制限回路
１０は誤差増幅器５の出力に応じて電流制限値を変更す
るよう偶成されており、演算増幅器６の出力電圧が低い
“し”レベルの充電初期には、電流制限回路１０で電力
制御トランジスタ３のベース電流を制限し、電力制御ト
ランジスタ３のコレクタ電流の最大値を制限して定電流
充電を実施し、演算ＷＩ＠器６の出力電圧が高い“Ｈ″
レベル充電末期には演算増幅器６の出力電圧にしたがっ
て電力制御トランジスタ３のベース電流をＩＩＩＪＩＩ
ＩＬ、電池２への印加電圧を制御して定電圧充電を実施
する。FIG. 1 shows a charging device of the present invention. A power 1IiIJiIl transistor 3 is interposed in series between the power supply 1 and the battery to be charged 2, and a current limiting circuit 1G is connected between the output of the error amplifier 5 for detecting the terminal voltage of the battery 2 and the base of the power control transistor 3. It is configured by interposing. The error amplifier 5 compares a resistor 11.12 that divides the terminal voltage of the battery 2, a reference voltage source 13, a reference voltage ER1 output from the reference voltage source 13, and a terminal voltage Es1 of the resistor 12. It is composed of an operational amplifier 6. The current limiting circuit 10 is configured to change the current limiting value according to the output of the error amplifier 5, and in the early stage of charging when the output voltage of the operational amplifier 6 is low and is at a low level, the current limiting circuit 10 performs power control. Constant current charging is performed by limiting the base current of the transistor 3 and the maximum value of the collector current of the power control transistor 3, so that the output voltage of the calculation WI @ unit 6 is high "H"
At the end of level charging, the base current of the power control transistor 3 is adjusted according to the output voltage of the operational amplifier 6.
IL and the voltage applied to the battery 2 are controlled to carry out constant voltage charging.
この偶成によると、電源１と電池２および電力制御トラ
ンジスタ３で構成される主回路に、従来のような電流検
出用の抵抗器４〔第３図参照〕を介装せずとも定電流充
電を実施することができ、回路の構成の簡略化と装置の
小型化を達成できる。According to this combination, constant current charging is possible without intervening the conventional current detection resistor 4 (see Figure 3) in the main circuit consisting of the power supply 1, battery 2, and power control transistor 3. The circuit structure can be simplified and the device can be made smaller.
第２図は他の実施例を示す。第１図に示す実施例では電
流制限手段として電流制限回路１０を設けたが、この第
２図ではｖＡ誤差増幅器の出力と電力問罪トランジスタ
３のベースとの間に、電流制御手段としての抵抗器１４
が介装されている。この場合、定電圧充電時には電池２
への印加電圧が一定となるよう前記演詐増＃Ａ器６の出
力電圧に応じて電力制御トランジスタ３を制御する。充
電初期において演粋増＠Ｍ６の出力が“Ｌ”レベルにあ
る場合には、（（ＶＩ Ｎ −Ｖｅ ｔ ）／Ｒ） ・
Ｆｌｔ ｅなる電流が定電流として電池２に流れる。こ
こで、Ｖ Ｉ Ｎ ハｆｌｌｌ １ ｆ）出力’ＲＦＩ
、Ｖｅ ｔ ハ電力ｍＪ’ｎトランジスタ３のベース・
エミッタ間の電圧値、ｈｒｓは電力制御トランジスタ３
の電流Ｒ１Ｊ幅率、Ｒは抵抗器１４の抵抗値である。こ
の第２図に示した充電＠置の場合にも、第１図に示した
充電装置と同様の効果が得られる。FIG. 2 shows another embodiment. In the embodiment shown in FIG. 1, a current limiting circuit 10 is provided as current limiting means, but in FIG. 14
is interposed. In this case, during constant voltage charging, battery 2
The power control transistor 3 is controlled according to the output voltage of the performance increaser #A device 6 so that the voltage applied to the amplifier #A is constant. In the initial stage of charging, when the output of the input booster @M6 is at “L” level, ((VIN − Ve t )/R) ・
A current Flte flows into the battery 2 as a constant current. Here, V I N 1 f) Output 'RFI
, Ve t c Power mJ'nBase of transistor 3
The voltage value between emitters, hrs is the power control transistor 3
The current R1J width ratio, R is the resistance value of the resistor 14. Even in the case of the charging device shown in FIG. 2, the same effects as those of the charging device shown in FIG. 1 can be obtained.
発明の効果
以上のように本発明によると、被充電電池の端子電圧を
検出するｗＡ誤差増幅器出力と電力制御トランジスタの
ベースとの間に電流制限手段を介装したため、電池の端
子電圧が低い充電初期には、電流制限手段が電力制御ト
ランジスタのベース電流の最大値を制限し、電力制御ト
ランジスタのコレクタ電流の最大値を制限して前記電池
への充電電流が定電流制御され、回路の構成を従来より
も筒中にできるとともに、従来のように電流検出用抵抗
器を電源と電池との間に直列に介装せずども定電流充電
することができるため、電流検出用の抵抗器の電力損失
をなくすることができ、装置の小型化を併せて達成でき
るものである。Effects of the Invention As described above, according to the present invention, since the current limiting means is interposed between the output of the wA error amplifier that detects the terminal voltage of the battery to be charged and the base of the power control transistor, charging with a low terminal voltage of the battery is possible. Initially, the current limiting means limits the maximum value of the base current of the power control transistor, and limits the maximum value of the collector current of the power control transistor, so that the charging current to the battery is controlled at a constant current, and the circuit configuration is controlled. In addition to being able to be placed in the cylinder than before, constant current charging can be performed without having to insert a current detection resistor in series between the power supply and battery as in the conventional case, reducing power loss in the current detection resistor. This also makes it possible to reduce the size of the device.
第１図は本発明の定電流・定電圧充電装置の−実施例の
構成図、第２図は本発明の他の実施例の構成図、第３図
は従来の定電流・定電圧充電装置の構成図である。
１・・・Ｔｉ源、２・・・電池〔被充電用の電池〕、３
・・・電力制御トランジスタ、５・・・誤差増幅器、１
０・・・電流制限回路（電流制限手段）、１４・・・抵
抗器（電流制限回路）。
代理人 森 本 義 弘
第２図Fig. 1 is a block diagram of an embodiment of the constant current/constant voltage charging device of the present invention, Fig. 2 is a block diagram of another embodiment of the present invention, and Fig. 3 is a conventional constant current/constant voltage charging device. FIG. 1...Ti source, 2...Battery [battery to be charged], 3
...Power control transistor, 5...Error amplifier, 1
0... Current limiting circuit (current limiting means), 14... Resistor (current limiting circuit). Agent Yoshihiro MorimotoFigure 2
Claims (1)
タを介装し、前記被充電電池の端子電圧を検出する誤差
増幅器の出力信号で前記電力制御トランジスタのベース
電位を制御するよう構成するとともに、前記電力制御ト
ランジスタのベースと前記誤差増幅器の出力との間に誤
差増幅器の出力に応じて電流制限値を変更する電流制限
手段を介装した定電流・定電圧充電装置。 ２、電流制限手段を抵抗器としたことを特徴とする特許
請求の範囲第１項記載の定電流・定電圧充電装置。[Claims] 1. A power control transistor is interposed in series between the power source and the battery to be charged, and the base potential of the power control transistor is determined by the output signal of an error amplifier that detects the terminal voltage of the battery to be charged. a constant current/constant voltage charging device, which is configured to control the power, and has current limiting means interposed between the base of the power control transistor and the output of the error amplifier to change a current limit value according to the output of the error amplifier. . 2. The constant current/constant voltage charging device according to claim 1, wherein the current limiting means is a resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62045020A JP2809391B2 (en) | 1987-02-26 | 1987-02-26 | Constant current / constant voltage charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62045020A JP2809391B2 (en) | 1987-02-26 | 1987-02-26 | Constant current / constant voltage charger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63213430A true JPS63213430A (en) | 1988-09-06 |
| JP2809391B2 JP2809391B2 (en) | 1998-10-08 |
Family
ID=12707657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62045020A Expired - Fee Related JP2809391B2 (en) | 1987-02-26 | 1987-02-26 | Constant current / constant voltage charger |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2809391B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11187586A (en) * | 1997-12-19 | 1999-07-09 | Nec Corp | Method and system for charging secondary battery |
| JP2007221936A (en) * | 2006-02-17 | 2007-08-30 | Ricoh Co Ltd | Semiconductor integrated circuit for charging control, and secondary battery charger employing the semiconductor integrated circuit for charging control |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5026325U (en) * | 1973-06-30 | 1975-03-26 | ||
| JPS583538A (en) * | 1981-06-24 | 1983-01-10 | 三菱電機株式会社 | Storage battery charger |
-
1987
- 1987-02-26 JP JP62045020A patent/JP2809391B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5026325U (en) * | 1973-06-30 | 1975-03-26 | ||
| JPS583538A (en) * | 1981-06-24 | 1983-01-10 | 三菱電機株式会社 | Storage battery charger |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11187586A (en) * | 1997-12-19 | 1999-07-09 | Nec Corp | Method and system for charging secondary battery |
| JP2007221936A (en) * | 2006-02-17 | 2007-08-30 | Ricoh Co Ltd | Semiconductor integrated circuit for charging control, and secondary battery charger employing the semiconductor integrated circuit for charging control |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2809391B2 (en) | 1998-10-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |