JPH04255431A - Charging circuit - Google Patents
Charging circuitInfo
- Publication number
- JPH04255431A JPH04255431A JP3005162A JP516291A JPH04255431A JP H04255431 A JPH04255431 A JP H04255431A JP 3005162 A JP3005162 A JP 3005162A JP 516291 A JP516291 A JP 516291A JP H04255431 A JPH04255431 A JP H04255431A
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- voltage
- circuit
- storage battery
- connection terminals
- 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 31
- 230000007423 decrease Effects 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、複数種類の蓄電池が種
類別に接続可能にされ、接続された蓄電池に適した充電
電流を供給する充電回路の改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a charging circuit which allows a plurality of types of storage batteries to be connected according to type and supplies a charging current suitable for the connected storage batteries.
【０００２】0002
【従来の技術】従来、蓄電池の種類に応じた充電電流に
切り換えて充電を行う充電回路が知られている。2. Description of the Related Art Conventionally, charging circuits have been known that perform charging by switching to a charging current depending on the type of storage battery.
【０００３】この充電回路は、蓄電池が種類別に接続さ
れる複数の接続端子のいずれかに蓄電池が接続されると
、検出手段により上記蓄電池の接続された接続端子が判
別され、この判別結果に基づいて電源回路から蓄電池の
種類に応じた充電電流が出力され、蓄電池に充電が行わ
れるようになっている。[0003] In this charging circuit, when a storage battery is connected to one of a plurality of connection terminals to which storage batteries are connected according to type, the detection means determines which connection terminal the storage battery is connected to, and based on the result of this determination, A charging current corresponding to the type of storage battery is output from the power supply circuit, and the storage battery is charged.
【０００４】すなわち、上記検出手段は蓄電池の接続状
態を判別するため、電源回路と各接続端子間にそれぞれ
ダイオードを接続し、接続端子のいずれかに蓄電池が接
続され、電源回路から上記ダイオードを通して蓄電池に
電流が流れ、該ダイオードに順電圧の電圧降下が生じる
と、この順電圧の電圧降下を検出手段により検出して該
接続端子に蓄電池が接続されたと判別するようにしてい
る。That is, in order to determine the connection state of the storage battery, the detection means connects a diode between the power supply circuit and each connection terminal, the storage battery is connected to one of the connection terminals, and the storage battery is connected from the power supply circuit through the diode. When a current flows through the diode and a forward voltage drop occurs, the detection means detects this forward voltage drop and determines that a storage battery is connected to the connection terminal.
【０００５】[0005]
【発明が解決しようとする課題】ところが、通常ダイオ
ードの順電圧は０．６Ｖ程度と低く、更に充電電流が小
さいほど上記順電圧は低くなる。このため、接続端子に
蓄電池が接続された場合の電圧降下を正確に検出するこ
とが容易ではなく、蓄電池の接続状態を誤検出する虞れ
があった。However, the forward voltage of a diode is usually as low as about 0.6 V, and the smaller the charging current is, the lower the forward voltage becomes. For this reason, it is not easy to accurately detect a voltage drop when a storage battery is connected to the connection terminal, and there is a risk of erroneously detecting the connection state of the storage battery.
【０００６】本発明は、上記問題を解決するもので、確
実に蓄電池の接続を検出して充電電流を切り換える充電
回路を提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a charging circuit that reliably detects connection of a storage battery and switches charging current.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
に、本発明は、複数種類の蓄電池が種類別に接続可能に
された複数の接続端子と、直流電源からの充電電流を蓄
電池の種類に応じて切り換える電源手段とを備え、上記
電源手段の出力側を上記各接続端子に接続してなる充電
回路において、上記直流電源と上記各接続端子間にそれ
ぞれ接続される抵抗と、上記電源手段の出力側と上記各
接続端子間にそれぞれ順方向に接続される整流素子と、
上記各接続端子の電圧を検出する検出手段と、該検出電
圧の大小を比較する比較手段と、該比較結果に応じて上
記電源手段の充電電流を切り換える切換制御手段とを有
するものである。[Means for Solving the Problems] In order to achieve the above object, the present invention provides a plurality of connection terminals to which a plurality of types of storage batteries can be connected according to the types, and a charging current from a DC power source that can be connected to different types of storage batteries. A charging circuit comprising a power supply means that switches according to the power supply means, and in which the output side of the power supply means is connected to each of the connection terminals, a resistor connected between the DC power supply and each of the connection terminals, and a resistor of the power supply means. a rectifying element connected in the forward direction between the output side and each of the above connection terminals,
The device includes a detection means for detecting the voltage of each of the connection terminals, a comparison means for comparing the magnitude of the detected voltage, and a switching control means for switching the charging current of the power supply means according to the comparison result.
【０００８】[0008]
【作用】上記構成の充電回路によれば、種類別の蓄電池
が接続される各接続端子にそれぞれ抵抗を通して電源電
圧が印加され、検出手段により上記各接続端子の電圧が
検出され、比較手段により上記検出電圧の大小が比較さ
れる。そして、いずれかの接続端子に蓄電池が接続され
て該接続端子の検出電圧が低下すると、比較手段の比較
結果により上記検出電圧の低下した接続端子が判別され
、該接続端子に接続された蓄電池の種類に応じた充電電
流に切り換えられて該蓄電池が充電される。[Operation] According to the charging circuit configured as above, the power supply voltage is applied through the respective resistors to each connection terminal to which each type of storage battery is connected, the voltage of each connection terminal is detected by the detection means, and the voltage of each connection terminal is detected by the comparison means. The detected voltages are compared in magnitude. Then, when a storage battery is connected to any of the connection terminals and the detected voltage of the connection terminal decreases, the connection terminal whose detection voltage has decreased is determined based on the comparison result of the comparison means, and the connection terminal of which the detection voltage has decreased is determined. The storage battery is charged by switching to a charging current according to the type.
【０００９】[0009]
【実施例】図１は本発明に係る充電回路の一例を示す回
路図である。本充電回路は電源回路１、パック検出回路
２、充電制御回路３、ダイオードＤ１，Ｄ２、バイパス
抵抗Ｒ１，Ｒ２及び接続端子Ｔ０，Ｔ１，Ｔ２を備え、
接続端子Ｔ１，Ｔ０間あるいは接続端子Ｔ２，Ｔ０間の
いずれか一方に蓄電池が接続されると、この蓄電池の種
類に応じた充電電流に切り換えて充電を行うようにして
いる。なお、接続端子Ｔ１，Ｔ０間及び接続端子Ｔ２，
Ｔ０間にはそれぞれ所定の種類の蓄電池のみが接続され
るようになっている。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a circuit diagram showing an example of a charging circuit according to the present invention. This charging circuit includes a power supply circuit 1, a pack detection circuit 2, a charging control circuit 3, diodes D1, D2, bypass resistors R1, R2, and connection terminals T0, T1, T2,
When a storage battery is connected between the connection terminals T1 and T0 or between the connection terminals T2 and T0, charging is performed by switching to a charging current according to the type of the storage battery. In addition, between the connection terminals T1 and T0 and between the connection terminals T2,
Only storage batteries of predetermined types are connected between T0.
【００１０】電源回路１は直流電源４から電源電圧Ｅを
供給されて充電電流をダイオードＤ１あるいはダイオー
ドＤ２を通して接続端子Ｔ１あるいは接続端子Ｔ２に供
給するものである。また、電源回路１は接続端子に接続
された蓄電池の種類に応じた充電電流を供給すべく充電
制御回路３からの切換信号に応じて充電電流を切り換え
るようになっている。The power supply circuit 1 is supplied with a power supply voltage E from a DC power supply 4 and supplies a charging current to a connecting terminal T1 or a connecting terminal T2 through a diode D1 or a diode D2. Further, the power supply circuit 1 switches the charging current according to a switching signal from the charging control circuit 3 in order to supply a charging current according to the type of storage battery connected to the connection terminal.
【００１１】ダイオードＤ１，Ｄ２は接続端子Ｔ１，Ｔ
２間を電気的に遮断するためのものである。バイパス抵
抗Ｒ１，Ｒ２は直流電源４の正極側とダイオードＤ１，
Ｄ２の各カソード間にそれぞれ接続され、ダイオードＤ
１，Ｄ２の各カソードに直流電源４の電源電圧Ｅをそれ
ぞれ印加するようにしている。なお、上記電源電圧Ｅは
蓄電池の電池電圧に比べて十分に高い電圧になっている
。一方、バイパス抵抗Ｒ１，Ｒ２の各抵抗値は十分に高
く、接続端子Ｔ１，Ｔ０間あるいは接続端子Ｔ２，Ｔ０
間に接続された蓄電池に直流電源４から電流がほとんど
流れないようにしている。Diodes D1 and D2 are connected to connection terminals T1 and T.
This is to electrically isolate the two. Bypass resistors R1 and R2 connect the positive electrode side of the DC power supply 4 and the diode D1,
A diode D is connected between each cathode of D2.
A power supply voltage E of a DC power supply 4 is applied to each of the cathodes 1 and D2. Note that the power supply voltage E is sufficiently higher than the battery voltage of the storage battery. On the other hand, the resistance values of the bypass resistors R1 and R2 are sufficiently high, and the resistance value between the connecting terminals T1 and T0 or between the connecting terminals T2 and T0 is
Almost no current flows from the DC power supply 4 to the storage battery connected between them.
【００１２】パック検出回路２はダイオードＤ１，Ｄ２
のそれぞれのカソードの電圧、すなわち接続端子Ｔ１，
Ｔ２の電圧を検出端子２１，２２に導いて検出し、蓄電
池の接続された接続端子を判別するものである。すなわ
ち、接続端子Ｔ１，Ｔ０間あるいは接続端子Ｔ２，Ｔ０
間のいずれか一方に蓄電池が接続された場合、蓄電池の
接続された接続端子は直流電源４の電源電圧Ｅに対して
電源回路１での電圧降下分及びダイオードの順電圧の和
だけ低くなる。The pack detection circuit 2 includes diodes D1 and D2.
, i.e. the voltage at the respective cathodes of the connection terminals T1,
The voltage at T2 is guided to detection terminals 21 and 22 and detected to determine which connection terminal the storage battery is connected to. That is, between the connection terminals T1 and T0 or between the connection terminals T2 and T0
When a storage battery is connected to either one of the two, the connection terminal to which the storage battery is connected becomes lower than the power supply voltage E of the DC power supply 4 by the sum of the voltage drop in the power supply circuit 1 and the forward voltage of the diode.
【００１３】従って、パック検出回路２は検出端子２１
，２２により上記接続端子Ｔ１，Ｔ２の電圧を検出し、
これらの電圧を比較して電圧差があれば、上記電圧の低
電位側の接続端子に蓄電池が接続されていると判別する
ようにしている。そして、パック検出回路２は上記判別
結果を充電制御回路３に出力するようにしている。Therefore, the pack detection circuit 2 has a detection terminal 21
, 22 to detect the voltage of the connection terminals T1 and T2,
These voltages are compared and if there is a voltage difference, it is determined that the storage battery is connected to the connection terminal on the lower potential side of the voltage. The pack detection circuit 2 outputs the above determination result to the charging control circuit 3.
【００１４】充電制御回路３はパック検出回路２からの
判別信号を受けて電源回路１に切換信号を出力して切換
制御するものである。The charging control circuit 3 receives the determination signal from the pack detection circuit 2, outputs a switching signal to the power supply circuit 1, and performs switching control.
【００１５】なお、各蓄電池の負極側が接続される接続
端子Ｔ０は共用しており、端子部材の削減を図っている
。[0015] The connection terminal T0 to which the negative electrode side of each storage battery is connected is shared, thereby reducing the number of terminal members.
【００１６】次に、上記充電回路の動作について説明す
る。Next, the operation of the charging circuit will be explained.
【００１７】接続端子Ｔ１，Ｔ０間及び接続端子Ｔ２，
Ｔ０間のいずれにも蓄電池が接続されていない場合、パ
ック検出回路２の検出端子２１，２２にはそれぞれ直流
電源４の電源電圧Ｅがそのまま入力される。このため、
パック検出回路２は接続端子Ｔ１，Ｔ０間及び接続端子
Ｔ２，Ｔ０間のいずれにも蓄電池が接続されていないと
判別し、電源回路１からは充電電流が出力されないこと
になる。[0017] Between the connecting terminals T1 and T0 and between the connecting terminals T2,
When no storage battery is connected between T0, the power supply voltage E of the DC power supply 4 is input as is to the detection terminals 21 and 22 of the pack detection circuit 2, respectively. For this reason,
The pack detection circuit 2 determines that no storage battery is connected between the connection terminals T1 and T0 and between the connection terminals T2 and T0, and the power supply circuit 1 will not output charging current.
【００１８】一方、図１の実線に示すように、接続端子
Ｔ１，Ｔ０間に蓄電池Ｂ１が接続されると、ダイオード
Ｄ１のカソード電圧が低下し、検出端子２１の検出電圧
が検出端子２２の検出電圧よりも低くなる。パック検出
回路２はこの検出電圧の大小関係を比較して接続端子Ｔ
１，Ｔ０間に蓄電池Ｂ１が接続されたと判別し、充電制
御回路３に接続端子Ｔ１，Ｔ０間に蓄電池Ｂ１が接続さ
れた旨を示す判別信号を出力する。このため、充電制御
回路３は電源回路１に上記判別信号に応じた切換信号を
出力し、電源回路１から上記蓄電池Ｂ１の種類に応じた
充電電流が出力される。On the other hand, as shown by the solid line in FIG. 1, when the storage battery B1 is connected between the connection terminals T1 and T0, the cathode voltage of the diode D1 decreases, and the voltage detected at the detection terminal 21 becomes higher than that detected at the detection terminal 22. lower than the voltage. The pack detection circuit 2 compares the magnitude relationship of this detection voltage and connects the connection terminal T.
It is determined that the storage battery B1 is connected between the connection terminals T1 and T0, and a determination signal is output to the charging control circuit 3 indicating that the storage battery B1 is connected between the connection terminals T1 and T0. Therefore, the charging control circuit 3 outputs a switching signal according to the discrimination signal to the power supply circuit 1, and the power supply circuit 1 outputs a charging current according to the type of the storage battery B1.
【００１９】一方、上記蓄電池Ｂ１に代えて、図１の二
点鎖線に示すように、接続端子Ｔ２，Ｔ０間に蓄電池Ｂ
２が接続されると、ダイオードＤ２のカソード電圧が低
下し、検出端子２２の検出電圧が検出端子２１の検出電
圧よりも低くなる。パック検出回路２は、この検出電圧
の大小関係を比較して接続端子Ｔ２，Ｔ０間に蓄電池Ｂ
２が接続されたと判別し、充電制御回路３に接続端子Ｔ
２，Ｔ０間に蓄電池Ｂ２が接続された旨を示す判別信号
を出力する。このため、充電制御回路３は電源回路１に
上記判別信号に応じた切換信号を出力し、電源回路１か
ら上記蓄電池Ｂ２の種類に応じた充電電流が出力される
。On the other hand, instead of the storage battery B1, as shown by the two-dot chain line in FIG.
2 is connected, the cathode voltage of the diode D2 decreases, and the detection voltage at the detection terminal 22 becomes lower than the detection voltage at the detection terminal 21. The pack detection circuit 2 compares the magnitude relationship of the detected voltages and connects the storage battery B between the connection terminals T2 and T0.
2 is connected, and the connection terminal T is connected to the charging control circuit 3.
A determination signal indicating that storage battery B2 is connected between T0 and B2 is output. For this reason, the charging control circuit 3 outputs a switching signal to the power supply circuit 1 according to the discrimination signal, and the power supply circuit 1 outputs a charging current according to the type of the storage battery B2.
【００２０】このように、蓄電池が接続端子Ｔ１，Ｔ０
間あるいは接続端子Ｔ２，Ｔ０間のいずれか一方に接続
されると、検出端子２１，２２間に電源回路１での電圧
降下分及びダイオードの順電圧の和だけの電圧差が生じ
ることになる。この電圧差は比較的大きいため、蓄電池
の接続の有無を確実に判別することができる。In this way, the storage battery connects the connection terminals T1, T0
If it is connected to one of the terminals T2 and T0, a voltage difference equal to the sum of the voltage drop in the power supply circuit 1 and the forward voltage of the diode will occur between the detection terminals 21 and 22. Since this voltage difference is relatively large, it is possible to reliably determine whether the storage battery is connected or not.
【００２１】なお、上記説明では充電回路に接続できる
蓄電池の種類を２種類としたが、蓄電池の種類は３種類
以上であっても本発明を適用することができる。この場
合、蓄電池の種類の増加に応じて接続端子及び切り換え
られる充電電流の種類を増加させることになる。In the above description, there are two types of storage batteries that can be connected to the charging circuit, but the present invention can be applied even if there are three or more types of storage batteries. In this case, as the types of storage batteries increase, the number of connection terminals and the types of charging currents that can be switched will be increased.
【００２２】[0022]
【発明の効果】本発明は、接続端子のいずれかに蓄電池
が接続された場合、蓄電池が接続された接続端子は直流
電源の電源電圧に対して電源手段での電圧降下分及び整
流素子の順電圧の和だけ低くなるので、確実に蓄電池の
接続を判別して充電電流を適正に切り換えることができ
、充電回路の信頼性を向上させることができる。Effects of the Invention According to the present invention, when a storage battery is connected to any of the connection terminals, the connection terminal to which the storage battery is connected is connected to the voltage drop in the power supply means and the order of the rectifier element with respect to the power supply voltage of the DC power supply. Since the voltage is lowered by the sum of the voltages, the connection of the storage battery can be reliably determined and the charging current can be appropriately switched, and the reliability of the charging circuit can be improved.
【図１】本発明に係る充電回路の一例を示す回路図であ
る。FIG. 1 is a circuit diagram showing an example of a charging circuit according to the present invention.
１ 電源回路（電源手段）
２ パック検出回路（検出手段、比較手段）３ 充
電制御回路（切換制御手段）
４ 直流電源
Ｂ１，Ｂ２ 蓄電池
Ｄ１，Ｄ２ ダイオード（整流素子）Ｒ１，Ｒ２
バイパス抵抗
Ｔ０，Ｔ１，Ｔ２ 接続端子1 Power supply circuit (power supply means) 2 Pack detection circuit (detection means, comparison means) 3 Charging control circuit (switching control means) 4 DC power supply B1, B2 Storage battery D1, D2 Diode (rectifying element) R1, R2
Bypass resistor T0, T1, T2 connection terminal
Claims (1)
にされた複数の接続端子と、直流電源からの充電電流を
蓄電池の種類に応じて切り換える電源手段とを備え、上
記電源手段の出力側を上記各接続端子に接続してなる充
電回路において、上記直流電源と上記各接続端子間にそ
れぞれ接続される抵抗と、上記電源手段の出力側と上記
各接続端子間にそれぞれ順方向に接続される整流素子と
、上記各接続端子の電圧を検出する検出手段と、該検出
電圧の大小を比較する比較手段と、該比較結果に応じて
上記電源手段の充電電流を切り換える切換制御手段とを
有することを特徴とする充電回路。Claim 1: A device comprising: a plurality of connection terminals to which a plurality of types of storage batteries can be connected according to type; and power supply means for switching charging current from a DC power supply according to the type of storage battery, the output side of the power supply means being In a charging circuit connected to each of the connection terminals, a resistor is connected between the DC power supply and each of the connection terminals, and a resistor is connected in the forward direction between the output side of the power supply means and each of the connection terminals. It has a rectifying element, a detection means for detecting the voltage of each of the connection terminals, a comparison means for comparing the magnitude of the detected voltage, and a switching control means for switching the charging current of the power supply means according to the comparison result. A charging circuit featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3005162A JPH04255431A (en) | 1991-01-21 | 1991-01-21 | Charging circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3005162A JPH04255431A (en) | 1991-01-21 | 1991-01-21 | Charging circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04255431A true JPH04255431A (en) | 1992-09-10 |
Family
ID=11603552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3005162A Pending JPH04255431A (en) | 1991-01-21 | 1991-01-21 | Charging circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04255431A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2012165340A1 (en) * | 2011-06-01 | 2015-02-23 | 株式会社日立製作所 | Power storage system |
-
1991
- 1991-01-21 JP JP3005162A patent/JPH04255431A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPWO2012165340A1 (en) * | 2011-06-01 | 2015-02-23 | 株式会社日立製作所 | Power storage system |
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