JPH0697817B2 - Charging circuit - Google Patents
Charging circuitInfo
- Publication number
- JPH0697817B2 JPH0697817B2 JP1316088A JP1316088A JPH0697817B2 JP H0697817 B2 JPH0697817 B2 JP H0697817B2 JP 1316088 A JP1316088 A JP 1316088A JP 1316088 A JP1316088 A JP 1316088A JP H0697817 B2 JPH0697817 B2 JP H0697817B2
- Authority
- JP
- Japan
- Prior art keywords
- storage battery
- charging circuit
- constant current
- circuit
- current 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.)
- Expired - Lifetime
Links
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Description
本発明は、商用電源をオンのまま蓄電池の交換を行って
もコネクタの焼損が起こらず充電できる充電回路に関す
るものである。The present invention relates to a charging circuit that can be charged without burning a connector even when a storage battery is replaced with a commercial power source turned on.
【従来の技術】 防災用その他の機器には、バックアップ機能付き（無停
電）直流電源装置があり、またパソコン等のコンピュー
タ機器にはバックアップ機能付き交流電源装置（UPS）
の導入が盛んである。それらの電源装置に使用されるニ
ッケルカドミウム蓄電池、鉛シール蓄電池等の蓄電池を
充電する回路としてドロッパー回路等を利用した定電流
充電回路がある。この定電流充電回路は蓄電池に常時一
定の充電電流を供給することにより蓄電池を常に満充電
状態にしておき、商用電源からの電力供給がいつとだえ
ても所定容量の電力供給が蓄電池からできるようにした
ものである。この定電流充電回路は蓄電池が過電圧状態
にならないような充電電流があらかじめ設定され、通常
の状態では蓄電池電圧はある電圧以下に保たれているの
であるが、蓄電池の劣化による蓄電池異常、または充電
回路の故障により充電回路が充電電流を制御できない状
態になると、蓄電池電圧が所定の電圧より上がってしま
うことがある。このことを一般に過電圧状態と呼んでい
るが、過電圧状態の蓄電池をさらに充電し続けると酸素
や水素ガスの発生により電池の容器を波壊する恐れもあ
り危険である。このことを防止する為に一般の充電回路
には過電圧防止回路を設け、蓄電池電圧が所定の値を越
えた場合には充電を停止してやるのが普通である。 第３図は従来の充電回路の回路図で、蓄電池11には商用
電源12より定電流充電回路13により定電流充電される。
蓄電池劣化、充電回路故障等により、蓄電池11の電圧が
所定電圧より高くなると、分圧抵抗R11R12の分圧電位が
基準電位を越え、過電圧検出回路14が働いてトランジス
タQ11をオンする。その結果、リレー15が励磁され接点1
6がオフとなり、定電流充電回路13と蓄電池11が切り離
され、充電は停止する。そのため、蓄電池11は過電圧状
態になることはなく、正常な電位を保持できる。又、蓄
電池11の放電があって、所定電圧より下がると過電圧検
出が解除され、自動的に充電が復帰する。しかし、この
機能は蓄電池11が劣化している場合には何度も再充電さ
れることになり、蓄電池11の破損が起こる可能性があり
危険である。2. Description of the Related Art For disaster prevention and other equipment, there is a DC power supply with backup function (uninterruptible), and for computer equipment such as personal computers, AC power supply (UPS) with backup function.
Is being actively introduced. There is a constant current charging circuit using a dropper circuit or the like as a circuit for charging a storage battery such as a nickel-cadmium storage battery or a lead-sealed storage battery used in those power supply devices. This constant current charging circuit keeps the storage battery in a fully charged state by constantly supplying a constant charging current to the storage battery so that the storage battery can supply power of a predetermined capacity no matter when the power supply from the commercial power source is stopped. It was done. In this constant current charging circuit, the charging current is set in advance so that the storage battery does not go into an overvoltage state, and under normal conditions the storage battery voltage is kept below a certain voltage. If the charging circuit becomes unable to control the charging current due to the failure of, the storage battery voltage may rise above a predetermined voltage. This is generally called an overvoltage state, but if a storage battery in an overvoltage state is further charged, there is a danger that the container of the battery may be broken due to the generation of oxygen or hydrogen gas, which is dangerous. In order to prevent this, a general charging circuit is usually provided with an overvoltage prevention circuit, and when the storage battery voltage exceeds a predetermined value, charging is normally stopped. FIG. 3 is a circuit diagram of a conventional charging circuit, in which a storage battery 11 is charged with a constant current by a constant current charging circuit 13 from a commercial power source 12.
When the voltage of the storage battery 11 becomes higher than a predetermined voltage due to deterioration of the storage battery, failure of the charging circuit, etc., the divided potential of the voltage dividing resistor R 11 R 12 exceeds the reference potential, and the overvoltage detection circuit 14 operates to turn on the transistor Q 11 . . As a result, relay 15 is excited and contact 1
6 is turned off, the constant current charging circuit 13 and the storage battery 11 are disconnected, and charging is stopped. Therefore, the storage battery 11 will not be in an overvoltage state and can maintain a normal potential. Further, when the storage battery 11 is discharged and falls below a predetermined voltage, the overvoltage detection is canceled and the charge is automatically restored. However, this function is recharged many times when the storage battery 11 is deteriorated, and the storage battery 11 may be damaged, which is dangerous.
従来の充電回路にあっては、過電圧が検出されて蓄電池
の交換が行なわれる際、商用電源をオンのまま蓄電池が
はずされると、過電圧検出機能が解除され、リレーの接
点がオンとなり、その状態で新しい蓄電池を接続する
と、接続と同時に充電が開始され、蓄電池をコネクタで
接続している場合には、接続時のアークの発生によって
コネクタが破損する危険があるという問題点があり、
又、蓄電池がコネクタの接触不良などによって未接続で
あることを検出し、警報を出したい場合、その検出回路
の追加により回路が複雑になるという問題点があった。 本発明は、従来の技術のこのような問題点に鑑みてなさ
れたもので、その目的とするところは、商用電源がオン
のまま蓄電池の交換を行っても、コネクタに焼損が起こ
らず充電できるようにするとともに、過電圧検出回路に
蓄電池未接続検出機能を兼ねることにより、回路を簡易
にすることにある。In a conventional charging circuit, when an overvoltage is detected and the storage battery is replaced, if the storage battery is removed while the commercial power supply is on, the overvoltage detection function is canceled and the relay contact turns on. When a new storage battery is connected in the state, charging starts at the same time as the connection, and when the storage battery is connected by the connector, there is a problem that the connector may be damaged due to arcing at the time of connection,
Further, when detecting that the storage battery is not connected due to poor contact of the connector or the like and outputting an alarm, there is a problem that the circuit becomes complicated by the addition of the detection circuit. The present invention has been made in view of the above problems of the conventional technology, and an object thereof is to charge a connector without burning even if the storage battery is replaced while the commercial power supply is on. In addition, the overvoltage detection circuit also has a storage battery non-connection detection function, thereby simplifying the circuit.
上記目的を達成するために、本発明における充電回路
は、蓄電池と定電流充電回路とを切り離した状態を維持
してその信号を同時に外部に警報し、商用電源をオンの
まま蓄電池を再接続するとき蓄電池接続検出、定電流充
電回路の出力オフ、蓄電池接続完了、定電流充電回路出
力オンの過程を経て充電を開始する如くしたものであ
る。In order to achieve the above object, the charging circuit in the present invention maintains the state where the storage battery and the constant current charging circuit are separated, and alerts the signal to the outside at the same time, and reconnects the storage battery with the commercial power source turned on. At this time, the charging is started through the processes of detecting the connection of the storage battery, turning off the output of the constant current charging circuit, completing the connection of the storage battery and turning on the output of the constant current charging circuit.
蓄電池と定電流充電回路とを切り離した状態を維持して
その信号を同時に外部に警報することによって蓄電池未
接続の信号を出力することができ、商用電源をオンのま
ま蓄電池を再接続するとき蓄電池接続検出、定電流充電
回路の出力をオフした後、蓄電池を接続して定電流充電
回路の出力をオンにすることによって、蓄電池接続時に
は充電電流が流れず、接続用のコネクタがアークにより
焼損する危険が全くない。A signal indicating that the storage battery is not connected can be output by maintaining the disconnection state of the storage battery and the constant current charging circuit and alerting that signal to the outside at the same time. After detecting the connection and turning off the output of the constant current charging circuit, by connecting the storage battery and turning on the output of the constant current charging circuit, the charging current does not flow when the storage battery is connected, and the connector for connection burns out due to the arc. There is no danger.
実施例について図面を参照して説明する。第１図におい
て、蓄電池１には商用電源２より定電流充電回路３、ダ
イオードＤ、リレー接点４、コネクタ５を介して定電流
充電される。過電圧検出回路６は、ダイオードＤとリレ
ー接点４の接続点に接続した分圧抵抗R1,R2に接続さ
れ、出力に接続したトランジスタQ1を介してリレー７を
励磁してリレー接点４を制御する。タイマー回路８は蓄
電池１を接続した瞬間トランジスタQ2をオンし、一定時
間後にオフする。トランジスタQ1がオンすると、定電流
充電回路３の出力がオフになる。 通常はリレー接点４は閉じていて、定電流充電回路３よ
り蓄電池１に充電される。蓄電池１が過電圧状態になる
と、分圧抵抗R1,R2の電位が上がり、過電圧検出回路６
が動作してトランジスタQ1がオン、リレー７が励磁され
てリレー接点４はオフ、リレー接点４′はオンになり、
充電は停止し、リレー接点４′によって外部警報が働
き、この状態は電池電圧が低下しても維持される。 商用電源２がオンのまま蓄電池を交換する場合、蓄電池
１を外しては過電圧検出は解除されない。それは、定電
流充電回路３の性質として、オープン状態、即ち蓄電池
１を接続しない状態では電流が流れないので、出力電圧
は通常の電池電圧よりかない高くなる。例えば24Vの蓄
電池１であれば通常30V以上の電圧が出力される。この
性質から蓄電池１を外しても分圧抵抗R1,R2の電位は定
電流充電回路３のオープン電圧がかかったままであり、
過電圧検出は解除されないのである。この状態で新しい
蓄電池１を接続すると、タイマー回路８がオンしてトラ
ンジスタQ2をオンにし、定電流充電回路３をオフにし、
過電圧検出回路６の出力をオフにし、リレー接点４をオ
ンにするとともにリレー接点４′をオフにし、タイマー
回路８の時間経過後にトランジスタQ2をオフさせると、
定電流充電回路３がオンして充電を開始する。従って、
コネクタ５に焼損等を防ぐことができる。即ち、商用電
源２をオンのまま蓄電池１の交換ができる。 蓄電池１が外れた場合には、定電流充電回路３の出力電
圧が高くなり、過電圧検出回路６が動作してリレー接点
４′がオンして警報出力を出し、蓄電池１の未接続の信
号を出力できる。このとき、リレー接点４はオフになる
が、過電圧検出は保持したままとなる。 従来の充電回路では、充電自動復帰となるが外部警報が
出力されるのは、定電流充電回路３の故障、蓄電池１の
寿命、あるいは蓄電池１未接続のいずれかであり、いず
れの場合でも充電回路が自動的に処置できず、人が処置
しなければならない点であり、本発明になっては、定電
流充電回路を切り離して外部に警報を出力することで、
蓄電池１が寿命又は未接続の状態あるいは定電流充電回
路３が故障したまま再充電されることはない。 第２図は本発明の具体的実施例の回路図で、定電流充電
回路３として直流電源９とドロッパー回路10とを用い、
過電圧検出回路６としてコンパレータCOMを用い、タイ
マー回路８としてCR時定数回路を用いている。蓄電池１
を交換するとき、新しい蓄電池１を接続すると、蓄電池
１よりタイマー回路８に電流が流れてａ点の電圧が上が
ってトランジスタQ2がオンし、トランジスタQ3のオフに
よりドロッパー回路10がオフし、分圧抵抗R1,R2の電位
が0Vになる。その結果コンパレータCOMがオフしてトラ
ンジスタQ1,リレー７が共にオフし、リレー接点４はオ
ン、リレー接点４′はオフする。コンデンサＣに電荷が
たまり、ａ点の電位が下がるとトランジスタQ2がオフ、
トランジスタQ3がオンして充電を開始する。Examples will be described with reference to the drawings. In FIG. 1, a storage battery 1 is charged with a constant current from a commercial power source 2 through a constant current charging circuit 3, a diode D, a relay contact 4, and a connector 5. The overvoltage detection circuit 6 is connected to the voltage dividing resistors R 1 and R 2 connected to the connection point of the diode D and the relay contact 4, and excites the relay 7 via the transistor Q 1 connected to the output to turn the relay contact 4 on. Control. The timer circuit 8 turns on the transistor Q 2 at the moment when the storage battery 1 is connected, and turns off after a fixed time. When the transistor Q 1 turns on, the output of the constant current charging circuit 3 turns off. Normally, the relay contact 4 is closed and the storage battery 1 is charged by the constant current charging circuit 3. When the storage battery 1 is in the overvoltage state, the potentials of the voltage dividing resistors R 1 and R 2 rise, and the overvoltage detection circuit 6
Is activated, the transistor Q 1 is turned on, the relay 7 is excited, the relay contact 4 is turned off, and the relay contact 4'is turned on.
Charging is stopped, an external alarm is activated by the relay contact 4 ', and this state is maintained even when the battery voltage drops. When the storage battery is replaced with the commercial power supply 2 turned on, the overvoltage detection is not released by removing the storage battery 1. As a property of the constant current charging circuit 3, no current flows in the open state, that is, the state in which the storage battery 1 is not connected, so that the output voltage is much higher than the normal battery voltage. For example, if the storage battery 1 is 24V, a voltage of 30V or higher is usually output. From this property, even if the storage battery 1 is removed, the potentials of the voltage dividing resistors R 1 and R 2 are still applied with the open voltage of the constant current charging circuit 3,
The overvoltage detection is not released. When a new storage battery 1 is connected in this state, the timer circuit 8 is turned on, the transistor Q 2 is turned on, the constant current charging circuit 3 is turned off,
Clear the output of the overvoltage detecting circuit 6 turns off the relay contact 4 'as well as to turn on the relay contact 4, when turning off the transistor Q 2 after a time lapse of the timer circuit 8,
The constant current charging circuit 3 is turned on to start charging. Therefore,
The connector 5 can be prevented from burning. That is, the storage battery 1 can be replaced while the commercial power supply 2 is on. When the storage battery 1 is detached, the output voltage of the constant current charging circuit 3 becomes high, the overvoltage detection circuit 6 operates, the relay contact 4'is turned on, and an alarm output is output, and a signal not connected to the storage battery 1 is output. Can be output. At this time, the relay contact 4 is turned off, but the overvoltage detection remains held. In the conventional charging circuit, the automatic alarm is returned, but the external alarm is output when the constant current charging circuit 3 is out of order, the storage battery 1 has a service life, or the storage battery 1 is not connected. It is a point that the circuit cannot be automatically treated and must be treated by a person.In the present invention, by disconnecting the constant current charging circuit and outputting an alarm to the outside,
The rechargeable battery 1 will not be recharged while it is in the life or not connected or the constant current charging circuit 3 is out of order. FIG. 2 is a circuit diagram of a specific embodiment of the present invention, in which a DC power supply 9 and a dropper circuit 10 are used as the constant current charging circuit 3,
A comparator COM is used as the overvoltage detection circuit 6, and a CR time constant circuit is used as the timer circuit 8. Storage battery 1
When a new storage battery 1 is connected when replacing, the current flows from the storage battery 1 to the timer circuit 8 and the voltage at point a rises, turning on the transistor Q 2 , and turning off the transistor Q 3 turns off the dropper circuit 10. The potential of the voltage dividing resistors R 1 and R 2 becomes 0V. As a result, the comparator COM is turned off, the transistor Q 1 and the relay 7 are both turned off, the relay contact 4 is turned on, and the relay contact 4 ′ is turned off. When the electric charge is accumulated in the capacitor C and the potential at the point a is lowered, the transistor Q 2 is turned off,
Transistor Q 3 turns on and begins charging.
本発明は上述のように構成しているので、商用電源がオ
ンのまま蓄電池の交換を行っても、コネクタの焼損が起
こらず充電できる上、過電圧検出回路に蓄電池未接続検
出機能を兼ねることができて回路を簡単にできるという
効果を奏するものである。Since the present invention is configured as described above, even if the storage battery is replaced while the commercial power supply is on, the connector can be charged without burning, and the overvoltage detection circuit can also serve as a storage battery non-connection detection function. The effect is that the circuit can be made simple.
第１図は本発明の一実施例のブロック回路図、第２図は
同上の具体回路図、第３図は従来例のブロック回路図で
ある。 １……蓄電池、３……定電流充電回路、4,4′……リレ
ー接点、６……過電圧検出回路、８……タイマー回路。FIG. 1 is a block circuit diagram of an embodiment of the present invention, FIG. 2 is a specific circuit diagram of the same as above, and FIG. 3 is a block circuit diagram of a conventional example. 1 ... Storage battery, 3 ... Constant current charging circuit, 4, 4 '... Relay contact, 6 ... Overvoltage detection circuit, 8 ... Timer circuit.
Claims (1)
し、過電圧検出により蓄電池と定電流充電回路とを切り
離す如くした充電回路において、蓄電池と定電流充電回
路とを切り離した状態を維持してその信号を同時に外部
に警報し、商用電源をオンのまま蓄電池を再接続すると
き蓄電池接続検出、定電流充電回路の出力オフ、蓄電池
接続完了、定電流充電回路出力オンの過程を経て充電を
開始する如くして成ることを特徴とする充電回路。1. A charging circuit configured to charge a storage battery with a constant current charging circuit at a constant current and to separate the storage battery and the constant current charging circuit by overvoltage detection, maintaining a state in which the storage battery and the constant current charging circuit are separated from each other. When the battery is reconnected while the commercial power is on, the signal is alerted to the outside at the same time, and charging is started after the process of detecting the battery connection, turning off the constant current charging circuit output, completing the battery connection, and turning on the constant current charging circuit output. A charging circuit characterized by being configured as described above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1316088A JPH0697817B2 (en) | 1988-01-23 | 1988-01-23 | Charging circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1316088A JPH0697817B2 (en) | 1988-01-23 | 1988-01-23 | Charging circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01190227A JPH01190227A (en) | 1989-07-31 |
| JPH0697817B2 true JPH0697817B2 (en) | 1994-11-30 |
Family
ID=11825419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1316088A Expired - Lifetime JPH0697817B2 (en) | 1988-01-23 | 1988-01-23 | Charging circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0697817B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11050064B2 (en) | 2018-07-16 | 2021-06-29 | Korea Institute Of Ocean Science & Technology | Seawater battery cell and seawater battery including seawater battery cells |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2505058B2 (en) * | 1990-06-26 | 1996-06-05 | 株式会社ピーエフユー | Abnormality detection method in battery charging circuit |
| JPH0515077A (en) * | 1990-11-27 | 1993-01-22 | Furukawa Battery Co Ltd:The | Charging circuit |
-
1988
- 1988-01-23 JP JP1316088A patent/JPH0697817B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11050064B2 (en) | 2018-07-16 | 2021-06-29 | Korea Institute Of Ocean Science & Technology | Seawater battery cell and seawater battery including seawater battery cells |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01190227A (en) | 1989-07-31 |
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