JPH0297234A - Secondary battery charging circuit - Google Patents
Secondary battery charging circuitInfo
- Publication number
- JPH0297234A JPH0297234A JP24628888A JP24628888A JPH0297234A JP H0297234 A JPH0297234 A JP H0297234A JP 24628888 A JP24628888 A JP 24628888A JP 24628888 A JP24628888 A JP 24628888A JP H0297234 A JPH0297234 A JP H0297234A
- Authority
- JP
- Japan
- Prior art keywords
- secondary battery
- voltage
- output
- charging
- resistor
- 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
Links
- 238000001514 detection method Methods 0.000 claims abstract description 25
- 230000002265 prevention Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の目的〕
（産業上の利用分野）
本発明は、急速充電、補充電の２つのモードを有する二
次電池の充電回路に関ザる。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a charging circuit for a secondary battery having two modes: quick charging and supplementary charging.
（従来の技術）
従来のこの種の急速充電と補充電の２つのモトを有する
二次電池充電回路としては、急速充電時は定電流で充電
を行ない、その後の補充電時は過充電防止のために抵抗
を介することにより擬似定電流回路として充電する回路
が知られている。(Prior art) Conventional secondary battery charging circuits of this type that have two functions: quick charging and auxiliary charging charge at a constant current during quick charging, and use overcharging prevention during subsequent auxiliary charging. For this reason, a circuit is known in which charging is performed as a pseudo constant current circuit through a resistor.
（発明が解決しようとする課題）
しかしながら、補充電時に抵抗を介して充電するだけで
は電源電圧の変動等ににり充電電流の変化は定電流回路
に比べて変化が大きく、電池に補充電電流以上の電流が
流れる場合がある。また、抵抗としては大型の電力抵抗
が必要となり高価となる問題を有している。(Problem to be solved by the invention) However, if the battery is only charged via a resistor during auxiliary charging, the change in charging current due to fluctuations in the power supply voltage will be larger than in a constant current circuit. In some cases, more current than that flows. Further, there is a problem in that a large-sized power resistor is required as a resistor, making it expensive.
本発明は上記問題点に鑑みなされたもので、安価で簡単
な二次電池充電回路を提供することを目的とする。The present invention was made in view of the above problems, and an object of the present invention is to provide an inexpensive and simple secondary battery charging circuit.
（課題を解決するための手段）
本発明の二次電池充電回路は二次電池に供給する電力を
制御する出力制御手段と、前記二次電池の電流を検出し
前記出力制御手段を制御づ−る電流検出手段ど、前記二
次電池の電圧を検出する電圧検出手段と、この電圧検出
手段の出力に基づいて出力制御手段の出力を切換える出
力切換手段とを具備するものである。(Means for Solving the Problems) A secondary battery charging circuit of the present invention includes an output control means for controlling power supplied to the secondary battery, and an output control means for detecting the current of the secondary battery and controlling the output control means. The current detection means includes voltage detection means for detecting the voltage of the secondary battery, and output switching means for switching the output of the output control means based on the output of the voltage detection means.
（作用）
本発明は、電圧検出手段で二次電池の電圧を検出し、二
次電池の電圧が設定値以下のときは出力制御手段は大き
な電力で二次電池を充電する。(Function) In the present invention, the voltage detection means detects the voltage of the secondary battery, and when the voltage of the secondary battery is below a set value, the output control means charges the secondary battery with large power.
そして、電流検出手段で二次電池の充電電流を検出し、
二次電池が定電流で充電されるように出力制御手段の出
力を制御する。また、二次電池の充電が進み、二次電池
の電圧が設定値以上であると電圧検出手段が判断したと
ぎは、出力切換手段の出力に基づいて出力制御手段の出
力を低出力にして二次電池を充電する。Then, the charging current of the secondary battery is detected by the current detection means,
The output of the output control means is controlled so that the secondary battery is charged with a constant current. Further, when the charging of the secondary battery progresses and the voltage detection means determines that the voltage of the secondary battery is higher than the set value, the output of the output control means is reduced to a low output based on the output of the output switching means. Next, charge the battery.
（実施例）
以下、本発明の二次電池充電回路の一実施例を図面を参
照して説明する。(Example) Hereinafter, an example of the secondary battery charging circuit of the present invention will be described with reference to the drawings.
１は図示しない直流を源からの電力を制御する出力制御
手段で、この出力制御手段１は急速充電時には大電流で
、補充電時には小電流で二次電池２を充電する。また、
充電経路には電流検出手段３が設けられ、二次電池２の
充電電流を検出し、この検出された電流に基づぎ出力制
御手段１の出力を制御して、定電流で二次電池２を充電
する。Reference numeral 1 denotes an output control means for controlling power from a direct current source (not shown), and this output control means 1 charges the secondary battery 2 with a large current during rapid charging and with a small current during supplementary charging. Also,
A current detection means 3 is provided in the charging path, detects the charging current of the secondary battery 2, controls the output of the output control means 1 based on the detected current, and controls the secondary battery 2 at a constant current. to charge.
さらに、二次電池２には電圧検出手段４が接続され、二
次電池２の充電電圧が設定値以上であるか否かを検出す
る。そして、この電圧検出手段４には二次電池２の充電
電圧が設定値以上であると判断されたとき、出力制御手
段１の出力を急速充電または補充電に切換える出力切換
手段５が接続されている。Further, a voltage detection means 4 is connected to the secondary battery 2, and detects whether the charging voltage of the secondary battery 2 is equal to or higher than a set value. The voltage detection means 4 is connected to an output switching means 5 which switches the output of the output control means 1 to quick charging or auxiliary charging when it is determined that the charging voltage of the secondary battery 2 is equal to or higher than a set value. There is.
次に具体的回路について説明する。直流電源の出力端間
には、正出力端側から負出力端側に、出力制御手段とし
ての３端子レギコレータ１、逆流防止用のダイオード６
、二次電池２および電流検出手段３の電流検出抵抗７が
直列に接続されている。なお、３端子レギユレータ１に
は、短絡保護、熱保護等の保護回路が組込まれている３
端子レギユレータＩ’Ｃ（たとえば日本電気株式公判製
μＰ Ｃ７８Ｌ ＯＯシリーズμＰＣ３１７Ｈ等）を用
いている。Next, a specific circuit will be explained. Between the output terminals of the DC power supply, from the positive output terminal side to the negative output terminal side, there is a three-terminal regicolator 1 as an output control means, and a diode 6 for backflow prevention.
, the secondary battery 2 and the current detection resistor 7 of the current detection means 3 are connected in series. Note that the 3-terminal regulator 1 has a built-in protection circuit such as short-circuit protection and thermal protection.
A terminal regulator I'C (for example, μPC78L OO series μPC317H manufactured by NEC Corporation) is used.
また、３端子レギユレーターの出力端と直流電源の負出
力端の間には抵抗８およびコレクタ・エミッタを介して
１〜ランジスタ９が直列に接続され、トランジスタ９の
ベースは抵抗１０を介して二次電池２の負極と電流検出
手段７との間に接続され、トランジスタ９のコレクタお
よび抵抗８の接続点と３端子レギユレーターの制御入力
端との間にはポルチーシボロワ回路を形成するオペアン
プからなるバッファアンプ１１が接続されている。また
、二次電池２に対して並列に、直列に接続された３つの
抵抗１２．１３．１４が接続されている。そして、この
抵抗１３には電圧検出スイッチ回路１５の検出端子が接
続されている。電圧検出スイッチ回路１５の出力端はト
ランジスタ１６のベースに接続され、このトランジスタ
ー６のコレクタは抵抗１７を介して抵抗８、オペアンプ
１１およびトランジスタ９のコレクタに接続され、トラ
ンジスタ１６のエミッタは１〜ランジスタ９のエミッタ
に接続されている。なお、抵抗１７の抵抗値は、トラン
ジスタ１６がオンされた際に、３端子レギユレーターの
電圧がほぼ定電圧となる値に設定しておく。Further, between the output end of the three-terminal regulator and the negative output end of the DC power supply, transistors 1 to 9 are connected in series via a resistor 8 and a collector/emitter, and the base of the transistor 9 is connected to the secondary terminal via a resistor 10. A buffer amplifier 11 is connected between the negative electrode of the battery 2 and the current detecting means 7, and is formed of an operational amplifier forming a portico lower circuit between the collector of the transistor 9 and the connection point of the resistor 8 and the control input terminal of the three-terminal regulator. is connected. Further, three resistors 12, 13, and 14 connected in series are connected in parallel to the secondary battery 2. A detection terminal of a voltage detection switch circuit 15 is connected to this resistor 13. The output terminal of the voltage detection switch circuit 15 is connected to the base of a transistor 16, the collector of this transistor 6 is connected via a resistor 17 to the resistor 8, the operational amplifier 11, and the collector of a transistor 9, and the emitter of the transistor 16 is connected to the transistors 1 to 1. It is connected to the emitter of 9. Note that the resistance value of the resistor 17 is set to a value such that the voltage of the three-terminal regulator becomes approximately a constant voltage when the transistor 16 is turned on.
次に上記実施例の動作について説明する。Next, the operation of the above embodiment will be explained.
まず、二次電池２を充電するに際して、電圧検出手段４
の電圧検出スイッチ回路１５で二次電池２の電圧を検出
し、二次電池２の電圧が設定値以下のときは１〜ランジ
スタ１６のベースにローレベル出力しトランジスタ１６
をオンしない。そして、３端子レギユレーターから急速
充電用の大電力で二次電池２を充電する。このとき、二
次電池２の充電電流を抵抗７で電圧に変換して検出し、
抵抗８とトランジスタつとにより構成される分圧回路で
、オペアンプ１１を介して３端子レギコレータ１の出力
を制御し、二次電池２の充電電流を定電流に制御して、
二次電池２を検出する。First, when charging the secondary battery 2, the voltage detection means 4
The voltage detection switch circuit 15 detects the voltage of the secondary battery 2, and when the voltage of the secondary battery 2 is below the set value, a low level is output to the bases of the transistors 1 to 16.
Do not turn on. Then, the secondary battery 2 is charged with high power for quick charging from the three-terminal regulator. At this time, the charging current of the secondary battery 2 is converted into voltage by the resistor 7 and detected,
A voltage dividing circuit composed of a resistor 8 and a transistor controls the output of the 3-terminal regicolator 1 via the operational amplifier 11, and controls the charging current of the secondary battery 2 to a constant current.
Detect the secondary battery 2.
そうして、二次電池２の充電が進み、設定電圧以上に充
電されると電圧検量スイッチ回路１５がトランジスタ１
６にベース電流を供給してトランジスタ１６をオンし、
１〜ランジスタ９に流れていた電流を抵抗１７にバイパ
スさせる。これにより、補充電である低出力に切換り３
端子レギユレータ１は二次電池２を低電力で・充電する
。Then, when the charging of the secondary battery 2 progresses and the voltage exceeds the set voltage, the voltage calibration switch circuit 15 switches the transistor 1
6 and turns on the transistor 16,
The current flowing through the transistors 1 to 9 is bypassed to the resistor 17. This causes the switch to low output, which is supplementary charging.
The terminal regulator 1 charges the secondary battery 2 with low power.
」−記実施例によれば、３端子レギユレータ１を用いた
ので、外部の保護回路が不要となり、安価に製作できか
つ小型化が図れる。According to the embodiment described above, since the three-terminal regulator 1 is used, there is no need for an external protection circuit, and the device can be manufactured at low cost and downsized.
また、３端子レギ］レーク１の出力はオペアンプ１１の
正転入力端の電位を変化させることにより変化覆るので
、その他のイ・」油制御を容易に実現できる。Further, since the output of the three-terminal leg rake 1 can be changed by changing the potential at the normal input terminal of the operational amplifier 11, other types of oil control can be easily realized.
本発明によれば、出力制御手段により充電出力を制御す
るので、補充電用の大型の抵抗を必要どせずか゛つ外部
の保護回路が不要どなるので安価で簡単な回路どするこ
とができる。また、電流検出手段で検出された充電電流
に基づいて出力制御手段の出力を制御するので急速充電
時の電流を一定値に制御でき、また、補充定時も出力切
換手段により定電圧を設定するので大型の抵抗等を用い
ることなく入力電圧の変化の影響を受りることなく安定
して二次電池を充電することができる。According to the present invention, since the charging output is controlled by the output control means, there is no need for a large resistor for auxiliary charging, and no external protection circuit is required, resulting in an inexpensive and simple circuit. In addition, since the output of the output control means is controlled based on the charging current detected by the current detection means, the current during rapid charging can be controlled to a constant value, and the constant voltage is set by the output switching means at the time of replenishment. It is possible to stably charge a secondary battery without using a large resistor or the like and without being affected by changes in input voltage.
図は本発明の一実施例を示す回路図である。
１・・出力制御手段としての３＠子レギコレタ、２・・
二次電池、３・・電流検出手段、１・・電圧検出手段、
５・・出力切換手段。The figure is a circuit diagram showing one embodiment of the present invention. 1.3@child leg collector as output control means, 2..
Secondary battery, 3. Current detection means, 1. Voltage detection means,
5...Output switching means.
Claims (1)
と、 前記二次電池の電流を検出し前記出力制御手段を制御す
る電流検出手段と、 前記二次電池の電圧を検出する電圧検出手段と、 この電圧検出手段の出力に基づいて出力制御手段の出力
を切換える出力切換手段と を具備することを特徴とする二次電池充電回路。(1) Output control means for controlling power supplied to the secondary battery; current detection means for detecting the current of the secondary battery and controlling the output control means; and voltage detection for detecting the voltage of the secondary battery. What is claimed is: 1. A secondary battery charging circuit comprising: a voltage detection means; and an output switching means for switching the output of the output control means based on the output of the voltage detection means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24628888A JPH0297234A (en) | 1988-09-30 | 1988-09-30 | Secondary battery charging circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24628888A JPH0297234A (en) | 1988-09-30 | 1988-09-30 | Secondary battery charging circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0297234A true JPH0297234A (en) | 1990-04-09 |
Family
ID=17146317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24628888A Pending JPH0297234A (en) | 1988-09-30 | 1988-09-30 | Secondary battery charging circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0297234A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1993023266A1 (en) * | 1992-05-12 | 1993-11-25 | Seiko Epson Corporation | Electric car |
-
1988
- 1988-09-30 JP JP24628888A patent/JPH0297234A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5900686A (en) * | 1902-09-09 | 1999-05-04 | Seiko Epson Corporation | Electric motor vehicle |
| WO1993023266A1 (en) * | 1992-05-12 | 1993-11-25 | Seiko Epson Corporation | Electric car |
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