JPH0628489B2 - Backup circuit - Google Patents
Backup circuitInfo
- Publication number
- JPH0628489B2 JPH0628489B2 JP59039810A JP3981084A JPH0628489B2 JP H0628489 B2 JPH0628489 B2 JP H0628489B2 JP 59039810 A JP59039810 A JP 59039810A JP 3981084 A JP3981084 A JP 3981084A JP H0628489 B2 JPH0628489 B2 JP H0628489B2
- Authority
- JP
- Japan
- Prior art keywords
- battery
- circuit
- load circuit
- terminal
- switch
- 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
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
- H02J7/60—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries including safety or protection arrangements
- H02J7/663—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries including safety or protection arrangements using battery or load disconnect circuits
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Stand-By Power Supply Arrangements (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、電地を電源とする機器のバックアップ回路に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backup circuit for equipment powered by an electric power source.
従来例の構成とその問題点 従来の代表的バックアップ回路例を第１図に示す。図に
於いて１は機器の電源である電池で、2aおよび２ｂから
成るコネクターで、２ａによりスイッチ３の一端に、２
ｂにより機器に接地されている。スイッチ３の他端は主
回路４、放電終止電圧検出回路５、および微少電流負荷
回路１１の為の電源回路６に接続されている。電源回路
６はスイッチ１０の接点１０ａを介して微少電流負荷回
路１１に接続されている。電源回路６とスイッチ接点１
０ａの接続点からダイオード７抵抗８を介してバックア
ップ用電池９の陽極が接続され、電池９の陰極は接地さ
れている。抵抗８と電池９の接続点はスイッチ１０の接
点１０ｂに接続されている。Configuration of Conventional Example and Its Problems FIG. 1 shows an example of a typical conventional backup circuit. In the figure, reference numeral 1 is a battery which is a power source of the device, and is a connector composed of 2a and 2b.
It is grounded to the equipment by b. The other end of the switch 3 is connected to the main circuit 4, the discharge end voltage detection circuit 5, and the power supply circuit 6 for the minute current load circuit 11. The power supply circuit 6 is connected to the minute current load circuit 11 via the contact 10a of the switch 10. Power circuit 6 and switch contact 1
The anode of the backup battery 9 is connected through the diode 7 and the resistor 8 from the connection point of 0a, and the cathode of the battery 9 is grounded. The connection point between the resistor 8 and the battery 9 is connected to the contact 10b of the switch 10.
次にこの回路の動作を説明する。Next, the operation of this circuit will be described.
スイッチ３がオンの状態で機器が動作することにより、
電池１の容量が減り端子電圧が下がる。放電終止電圧検
出回路５はこの端子電圧を監視しており電池１の端子電
圧が放電終止電圧に達すると、スイッチ３をオフさせ、
機器の動作を停止させ電池１の過放電を防止すると同時
にスイッチ10を接点１０ａから１０ｂに切替え微少電流
負荷回路１１に電池９を接続し微少電流負荷回路の動作
を継続させる。By operating the device with switch 3 turned on,
The capacity of the battery 1 decreases and the terminal voltage decreases. The discharge end voltage detection circuit 5 monitors this terminal voltage, and when the terminal voltage of the battery 1 reaches the discharge end voltage, the switch 3 is turned off,
The operation of the device is stopped to prevent the battery 1 from over-discharging, and at the same time, the switch 10 is switched from the contact 10a to the contact 10b to connect the battery 9 to the minute current load circuit 11 to continue the operation of the minute current load circuit.
ダイオード７は電池９の電流の逆流による放電防止用、
抵抗８は電池９の充電電流制限用（大電流で充電を行う
と電池の寿命を縮める為）として挿入されている。The diode 7 is for preventing discharge due to reverse current flow of the battery 9,
The resistor 8 is inserted to limit the charging current of the battery 9 (in order to shorten the life of the battery when charged with a large current).
この回路に於いて、電池９が放電状態でスイッチ３がオ
ンになった場合、抵抗８の電流制限により電池９は短時
間では十分充電されず、この間に電池１が放電終了又は
スイッチ３がオフされるとスイッチ１０が接点１０ａか
ら１０ｂに切替るが電池９の端子電圧が不十分の為微少
電流負荷回路11は正常に動作しない。In this circuit, when the switch 9 is turned on while the battery 9 is discharged, the battery 9 is not sufficiently charged in a short time due to the current limitation of the resistor 8, and the battery 1 is discharged or the switch 3 is turned off during this period. Then, the switch 10 switches from the contact 10a to the contact 10b, but since the terminal voltage of the battery 9 is insufficient, the minute current load circuit 11 does not operate normally.
発明の目的 本発明は上記の欠点を除去し微少電流負荷回路の動作を
確実にしかも安定に動作させることを目的とする。SUMMARY OF THE INVENTION It is an object of the present invention to eliminate the above-mentioned drawbacks and to operate the minute current load circuit reliably and stably.
発明の構成 本発明は電池の大電流放電時と、微少電流放電時の電池
の放電終止電圧の差を利用して、微少電流負荷回路のバ
ックアップをせんとするものであり、大電流を要する主
負荷回路と、微小電流で駆動される微小電流負荷回路
と、前記主負荷回路と微小電流負荷回路とに接続される
電池と、電池の端子電圧を予め定められた前記電池の放
電終止電圧と比較する放電終止電圧検出回路とを有し、
主負荷回路と微小電流負荷回路とが接続された電池の端
子電圧が前記放電終止電圧にまで低下したときに主負荷
回路を電池から解放し、前記主負荷回路の解放によって
上昇した電池の端子電圧によって、微小電流負荷回路を
動作させ、再び前記放電終止電圧まで端子電圧が低下し
たときに、微小電流負荷回路を電池から解放するように
構成したものである。Configuration of the Invention The present invention is intended to back up a minute current load circuit by utilizing the difference between the discharge end voltage of the battery at the time of discharging a large current of the battery and the discharge end voltage of the battery at the time of discharging a minute current. A load circuit, a minute current load circuit driven by a minute current, a battery connected to the main load circuit and the minute current load circuit, and a terminal voltage of the battery are compared with a predetermined discharge end voltage of the battery. And a discharge end voltage detection circuit that
When the terminal voltage of the battery to which the main load circuit and the minute current load circuit are connected is lowered to the discharge end voltage, the main load circuit is released from the battery, and the terminal voltage of the battery increased by the release of the main load circuit. According to this, the minute current load circuit is operated, and the minute current load circuit is released from the battery when the terminal voltage decreases to the discharge end voltage again.
実施例の説明 第４図に電池の放電々流と放電終止電圧の関係を示す。
この図からわかる様に放電終止電圧Ａは放電電流によっ
て異なり大電流放電になる程低い値となっている。Description of Examples FIG. 4 shows the relationship between the discharge discharge and the discharge end voltage of the battery.
As can be seen from this figure, the discharge end voltage A varies depending on the discharge current and has a lower value as the discharge becomes larger.
機器の放電終止電圧検出回路は通常微少電流放電時の終
止電圧に設定されている為、負荷電流の大きい大電流放
電の場合でも、この電圧値になると機器の動作を停止す
る。この時電池の容量は少し余裕を残している。Since the end-of-discharge voltage detection circuit of the device is usually set to the end voltage at the time of minute current discharge, the device stops operating at this voltage value even in the case of large-current discharge with a large load current. At this time, the capacity of the battery has some margin left.
例えば第４図で機器全体の負荷電流を０．５CA、微少電
流負荷回路の負荷電流を０．０１CAとするとＶu1の電圧
で主回路の動作を停止すれば電池の容量は端子電圧とし
て、Ｖu2まで残っている。For example, in FIG. 4, assuming that the load current of the entire device is 0.5 CA and the load current of the minute current load circuit is 0.01 CA, if the operation of the main circuit is stopped at the voltage of Vu 1 , the battery capacity becomes the terminal voltage, Vu There are 2 left.
第２図が本発明に基づくバックアップ回路のブロック図
である。第２図に於いて電池１は２ａおよび２ｂから成
るコネクターで機器のスイッチ１２およびスイッチ１３
に接続されている。スイッチ１２は微少電流負荷回路１
１、スイッチ１３は主回路４のオン，オフを制御する。
そしてスイッチ１２は通常オン状態で保持されている。
１４は放電終止電圧検出回路でスイッチ１２およびスイ
ッチ１３を、独立に制御する。１５は微少電流負荷回路
の短時間（電池１を交換する為の時間）バックアップし
ておく為のコンデンサである。FIG. 2 is a block diagram of a backup circuit according to the present invention. In FIG. 2, the battery 1 is a connector consisting of 2a and 2b, and is a switch 12 and a switch 13 of the device.
It is connected to the. Switch 12 is a minute current load circuit 1
1. The switch 13 controls ON / OFF of the main circuit 4.
The switch 12 is normally held in the ON state.
A discharge end voltage detection circuit 14 controls the switches 12 and 13 independently. Reference numeral 15 is a capacitor for backing up the minute current load circuit for a short time (time for replacing the battery 1).
次に第２図の動作原理を説明する。Next, the operation principle of FIG. 2 will be described.
スイッチ１２は常時オン状態に保持されていて放電終止
電圧検出回路１４によってのみオフされる。スイッチ１
３は、いわゆる機器の電源スイッチでスイッチ１３がオ
ン状態の時、主回路４が動作し、電池１の端子電圧が、
放電終止電圧に達すると放電終止電圧検出回路１４によ
って、まずスイッチ１３をオフとし主回路４の動作を停
止させ電池１の過放電を防止する。The switch 12 is always kept in an on state and is turned off only by the discharge end voltage detection circuit 14. Switch 1
3 is a so-called equipment power switch, and when the switch 13 is in the ON state, the main circuit 4 operates and the terminal voltage of the battery 1 is
When the end-of-discharge voltage is reached, the end-of-discharge voltage detection circuit 14 first turns off the switch 13 to stop the operation of the main circuit 4 to prevent the battery 1 from being over-discharged.
スイッチ１３がオフされると、電池１の負荷が軽減され
端子電圧が上昇する為、放電終止電圧検出回路１４は通
常状態に復帰する。When the switch 13 is turned off, the load on the battery 1 is reduced and the terminal voltage rises, so that the discharge end voltage detection circuit 14 returns to the normal state.
この間スイッチ１２は、オン状態を保つ様制御され微少
電流負荷回路１１の動作は持続されている。又スイッチ
１３は１回オフされると自動的にオンにならない様にな
っている為電池１の端子電圧が上昇してもオフのままで
ある。During this time, the switch 12 is controlled so as to maintain the ON state, and the operation of the minute current load circuit 11 is continued. Further, since the switch 13 does not automatically turn on once it is turned off, it remains off even if the terminal voltage of the battery 1 rises.
そして再び電池１の端子電圧が放電終止電圧に達すると
放電終止電圧検出回路１４によって、スイッチ１２がオ
フとなり全ての機能を停止する。When the terminal voltage of the battery 1 reaches the discharge end voltage again, the switch 12 is turned off by the discharge end voltage detection circuit 14 and all the functions are stopped.
以下、本発明のより具体的な一実施例について第３図を
参照して説明する。第３図に於いて電池１は２ａ，２ｂ
から成るコネクター２で２ａによりトランジスタ１６の
エミッタ，抵抗１７，ダイオード２２のアノード，リレ
ー３２の端子３２ａおよびスイッチ３７の一端３７ａ
に、２ｂにより接地されている。抵抗１７はトランジス
タ１６のエミッタ〜ベース間に接続され抵抗１８はトラ
ンジスタ１６のベースとトランジスタ１９のコレクタ間
に接続されている。トランジスタ１９のエミッタは接地
されている。Hereinafter, a more specific embodiment of the present invention will be described with reference to FIG. In FIG. 3, the battery 1 has 2a and 2b.
The connector 2 is composed of a connector 2a and an emitter of the transistor 16, a resistor 17, an anode of the diode 22, a terminal 32a of the relay 32 and an end 37a of the switch 37.
Grounded by 2b. The resistor 17 is connected between the emitter and the base of the transistor 16, and the resistor 18 is connected between the base of the transistor 16 and the collector of the transistor 19. The emitter of the transistor 19 is grounded.
トランジスタ１９のベースには抵抗２０，２１が接続さ
れ抵抗２１の他端は設置されている。抵抗２０の他端は
ダイオード２５のカソードとコンデンサ２４の一端が接
続されている。コンデンサ24の他端は抵抗２３を介して
ダイオード２２のカソードに接続されている。ダイオー
ド２５のアノードはマイコン３０の端子３０ｂに接続さ
れている。トランジスタ１６のコレクタは、電源回路６
および可変抵抗器２６の端子２６ａ，抵抗２７に接続さ
れ可変抵抗器２６の端子２６ｂはコンパレータ２９の端
子２９ｂに端子２６ｃは設置されている。電源回路６の
出力はコンデンサ１５，マイコン30の電源端子３０ｄに
接続されている。抵抗２７の他端はツェナーダイオード
２８を介して接地され抵抗２７とツェナーダイオード２
８の交点にコンパレータ２９の端子２９ａが接続されて
いる。コンパレータ２９の出力端子２９ｃはマイコン３
０の端子３０ａに接続されている。マイコン３０はその
他の微少電流負荷回路３１に接続されている。リレー３
２の端子３２ｂは主回路４に接続され、３２ｃはトラン
ジスタ３３のコレクタに接続されている。トランジスタ
３３のエミッタは接地され、ベースは抵抗３４，３５が
接続され抵抗３５の他端は接地されている。Resistors 20 and 21 are connected to the base of the transistor 19, and the other end of the resistor 21 is installed. The other end of the resistor 20 is connected to the cathode of the diode 25 and one end of the capacitor 24. The other end of the capacitor 24 is connected to the cathode of the diode 22 via the resistor 23. The anode of the diode 25 is connected to the terminal 30b of the microcomputer 30. The collector of the transistor 16 is the power supply circuit 6
The terminal 26a of the variable resistor 26 is connected to the terminal 26a of the variable resistor 26, and the terminal 26b of the variable resistor 26 is connected to the terminal 29b of the comparator 29. The output of the power supply circuit 6 is connected to the capacitor 15 and the power supply terminal 30d of the microcomputer 30. The other end of the resistor 27 is grounded via the zener diode 28 and the resistor 27 and the zener diode 2
The terminal 29a of the comparator 29 is connected to the intersection of eight. The output terminal 29c of the comparator 29 is the microcomputer 3
0 terminal 30a. The microcomputer 30 is connected to the other minute current load circuit 31. Relay 3
The second terminal 32b is connected to the main circuit 4, and the second terminal 32c is connected to the collector of the transistor 33. The emitter of the transistor 33 is grounded, the base is connected to the resistors 34 and 35, and the other end of the resistor 35 is grounded.
抵抗３４の他端はダイオード３６のカソードコンデンサ
３９の一端が接続されコンデンサ３９の他端は抵抗３８
を介してスイッチ３７の端子３７ｃに接続されている。The other end of the resistor 34 is connected to one end of the cathode capacitor 39 of the diode 36, and the other end of the capacitor 39 is connected to the resistor 38.
It is connected to the terminal 37c of the switch 37 via.
ダイオード３６のアノードは抵抗４０，４１およびダイ
オード４２のアノードが接続され、抵抗40の他端はスイ
ッチ３２の端子３２ｂと主回路４の交点に接続され、抵
抗４１の他端は設置されている。ダイオード４２のカソ
ードはマイコン３０の端子３０ｃに接続されている。The anode of the diode 36 is connected to the resistors 40 and 41 and the anode of the diode 42, the other end of the resistor 40 is connected to the intersection of the terminal 32b of the switch 32 and the main circuit 4, and the other end of the resistor 41 is installed. The cathode of the diode 42 is connected to the terminal 30c of the microcomputer 30.
スイッチ３７の端子３７ｂは接地されている。The terminal 37b of the switch 37 is grounded.
次にこの回路の動作を説明する。Next, the operation of this circuit will be described.
電池１がコネクター２ａ，２ｂにて接続されると、ダイ
オード２２、抵抗２３、コンデンサ２４、抵抗２４を介
してトランジスタ１９のベースをドライブしトランジス
タ１９をオンにしコレクタ電位を下げる。その結果抵抗
１８を介してトランジスタ１６のベース電位を引下げト
ランジスタ１６をオンにする。従って電源回路６、マイ
コン３０およびその周辺回路３１の動作が始まる。マイ
コン３０が動作を始めると端子３０ｂから出力を出し、
ダイオード２５抵抗２０の経路でトランジスタ１９のベ
ースをドライブし続ける為、トランジスタ１６はオン状
態を継続しマイコン３０の動作を継続させる。When the battery 1 is connected by the connectors 2a and 2b, the base of the transistor 19 is driven through the diode 22, the resistor 23, the capacitor 24, and the resistor 24 to turn on the transistor 19 and lower the collector potential. As a result, the base potential of the transistor 16 is pulled down via the resistor 18 and the transistor 16 is turned on. Therefore, the operations of the power supply circuit 6, the microcomputer 30, and the peripheral circuit 31 thereof are started. When the microcomputer 30 starts operating, it outputs an output from the terminal 30b,
Since the base of the transistor 19 is continuously driven by the path of the diode 25 resistor 20, the transistor 16 is kept in the ON state and the operation of the microcomputer 30 is continued.
次にスイッチ３７の端子３７ｃを３７ａに接続すると抵
抗３８，コンデンサ３９，抵抗３４を介してトランジス
タ３３のベースをドライブしトランジスタ３３をオンに
しリレー３２の励磁巻線32a 〜３２ｃに電流を長しリレ
ー３２ａ〜３２ｂ間を接続する。そして抵抗４０ダイオ
ード３６抵抗34の経路で正帰還をかけトランジスタ３３
をオン状態に保つ。従って主回路４に電源が供給され機
器が動作する。そしてスイッチ３７の接点３７ｃを３７
ｂに接続すると抵抗３８，コンデンサ３９，抵抗３４を
通してトランジスタ３３のベース電位が下げられトラン
ジスタ３３をオフさせる。トランジスタ３３がオフする
とリレー３２がオフとなり接点３２ｂの電位が無くなる
為、抵抗４０からの正帰還が無くなる為トランジスタ３
３はオフのままとなる。従って主回路４の動作が停止す
る。以上は機器の動作および停止をする一般動作であ
り、次にバックアップ動作の原理を説明する。リレー３
２がオンの状態で主回路が動作中、電池１の端子電圧が
下がり放電終止電圧に達すると、コンパレータ２９の端
子２９ｂの電位が２９ａの電位より低くなり、出力端子
２９ｃからマイコン３０の端子３０ａに信号を出す。こ
の信号によってマイコンの端子３０ｃの電位を一定時間
だけ下げる。そうするとダイオード４２を介して抵抗4
0，４１の交点の電位が下げられ、抵抗４０からの電圧
帰還が無くなる為、トランジスタ３３のベース電位が下
がり、トランジスタ３３がオフする。Next, when the terminal 37c of the switch 37 is connected to 37a, the base of the transistor 33 is driven through the resistor 38, the capacitor 39, and the resistor 34 to turn on the transistor 33, thereby extending the current to the exciting windings 32a to 32c of the relay 32 and relaying it. 32a-32b are connected. Then, a resistor 40, a diode 36, and a resistor 34 are used to apply positive feedback to the transistor 33
Keep on. Therefore, power is supplied to the main circuit 4 and the device operates. Then, the contact 37c of the switch 37 is set to 37
When connected to b, the base potential of the transistor 33 is lowered through the resistor 38, the capacitor 39, and the resistor 34 to turn off the transistor 33. When the transistor 33 is turned off, the relay 32 is turned off and the potential of the contact 32b disappears, and the positive feedback from the resistor 40 disappears, so that the transistor 3
3 remains off. Therefore, the operation of the main circuit 4 is stopped. The above is a general operation for starting and stopping the device. Next, the principle of the backup operation will be described. Relay 3
If the terminal voltage of the battery 1 drops and reaches the discharge end voltage while the main circuit is operating with 2 being on, the potential of the terminal 29b of the comparator 29 becomes lower than the potential of 29a, and the output terminal 29c to the terminal 30a of the microcomputer 30. Give a signal to. This signal lowers the potential of the terminal 30c of the microcomputer for a fixed time. Then, the resistor 4 is connected through the diode 42.
Since the potential at the intersection of 0 and 41 is lowered and the voltage feedback from the resistor 40 is eliminated, the base potential of the transistor 33 is lowered and the transistor 33 is turned off.
従ってリレー３２がオフとなり主回路４の動作を停止す
る。Therefore, the relay 32 is turned off and the operation of the main circuit 4 is stopped.
主回路４の動作が停止することによって電池１の負荷が
軽くなり端子電圧が上昇する。When the operation of the main circuit 4 is stopped, the load on the battery 1 is reduced and the terminal voltage rises.
この間マイコン３０の端子３０ｂはハイレベルに保って
おけばトランジスタ１９，１６はオン状態を継続しマイ
コン３０の動作も継続したままである。この状態から時
間が経過すると再び電池１の端子電圧が下がり再び放電
終止電圧に達し、コンパレータ２９が動作し同様にマイ
コン３０の端子３０ａに信号を出す。この信号により今
度はマイコン３０の端子３０ｂの電位を下げトランジス
タ１９をオフさせる。従ってトランジスタ１６がオフと
なり全ての動作を停止する。During this time, if the terminal 30b of the microcomputer 30 is kept at a high level, the transistors 19 and 16 are kept in the ON state and the operation of the microcomputer 30 is also kept. After a lapse of time from this state, the terminal voltage of the battery 1 decreases again and reaches the discharge end voltage again, and the comparator 29 operates and similarly outputs a signal to the terminal 30a of the microcomputer 30. This signal lowers the potential of the terminal 30b of the microcomputer 30 and turns off the transistor 19 this time. Therefore, the transistor 16 is turned off and all operations are stopped.
発明の効果 以上の様に本発明は２次電池の放電特性の特徴を利用し
て、バックアップ専用電池を設ける事なくバックアップ
動作をさせ得るものであり又主電池からバックアップ専
用電池へ切替える際の動作の不安定な状態も存在せず確
実でしかも安定なバックアップ動作を確保することがで
きるものである。さらに本発明は、主負荷回路を解放し
てバックアップ動作を開始するときの電池の端子電圧
を、機器の動作を停止させるときの端子電圧、すなわち
放電終止電圧と同じにしてあるので、放電終止電圧検出
回路を主負荷回路を開放するときの端子電圧検出回路と
して共用できるので、回路構成を簡単にすることができ
る。EFFECTS OF THE INVENTION As described above, the present invention can utilize the characteristics of the discharge characteristics of the secondary battery to perform the backup operation without providing the backup dedicated battery, and the operation when switching from the main battery to the backup dedicated battery. There is no unstable state, and a reliable and stable backup operation can be secured. Further, according to the present invention, the terminal voltage of the battery when releasing the main load circuit and starting the backup operation is the same as the terminal voltage when stopping the operation of the device, that is, the discharge end voltage. Since the detection circuit can be shared as the terminal voltage detection circuit when the main load circuit is opened, the circuit configuration can be simplified.
第１図は従来のバックアップ回路を示すブロック図、第
２図は本発明のバックアップ回路の１実施例のブロック
図で、第３図が本発明の同実施例の具体的な回路図、第
４図は２次電池の放電特性の一例を示す図である。 １……電池、２（２ａ，２ｂ）……コネクター、３……
スイッチ、４……主回路、５……放電終止電圧検出回
路、６……電源回路、７……ダイオード、８……抵抗、
９……バックアップ用電池、１０……スイッチ、１１…
…微少電流負荷回路、１２，１３……スイッチ、１４…
…放電終止電圧検出回路、１５……コンデンサ、１６…
…トランジスタ、１７，１８，２０，２１，２３，２
７，３４，３５，３８，４０，４１……抵抗、１９……
トランジスタ、２２……ダイオード、２４……コンデン
サ、２５……ダイオード、２６……可変抵抗器、２８…
…ツェナーダイオード、１９……コンパレータ、３０…
…マイコン、３１……微少負荷電流回路１１のマイコン
３０以外の部分、３２……リレー、３３……トランジス
タ、３６……ダイオード、３７……スイッチ、３９……
コンデンサ、４２……ダイオード。FIG. 1 is a block diagram showing a conventional backup circuit, FIG. 2 is a block diagram of one embodiment of the backup circuit of the present invention, and FIG. 3 is a specific circuit diagram of the same embodiment of the present invention, and FIG. The figure is a diagram showing an example of the discharge characteristics of the secondary battery. 1 ... Battery, 2 (2a, 2b) ... Connector, 3 ...
Switch, 4 ... Main circuit, 5 ... Discharge end voltage detection circuit, 6 ... Power supply circuit, 7 ... Diode, 8 ... Resistance,
9 ... Backup battery, 10 ... Switch, 11 ...
... Small current load circuit, 12,13 ... Switch, 14 ...
… Discharge end voltage detection circuit, 15… Capacitor, 16…
... Transistors, 17, 18, 20, 21, 23, 2
7, 34, 35, 38, 40, 41 ... Resistance, 19 ...
Transistor, 22 ... Diode, 24 ... Capacitor, 25 ... Diode, 26 ... Variable resistor, 28 ...
... Zener diode, 19 ... Comparator, 30 ...
... Microcomputer, 31 ... Parts of the micro load current circuit 11 other than the microcomputer 30, 32 ... Relay, 33 ... Transistor, 36 ... Diode, 37 ... Switch, 39 ...
Capacitor 42 ... Diode.
Claims (1)
駆動される微小電流負荷回路と、前記主負荷回路と微小
電流負荷回路とに接続される電池と、電池の端子電圧を
予め定められた前記電池の放電終止電圧と比較する放電
終止電圧検出回路とを有し、主負荷回路と微小電流負荷
回路とが接続された電池の端子電圧が前記放電終止電圧
にまで低下したときに主負荷回路を電池から解放し、前
記主負荷回路の解放によって上昇した電池の端子電圧に
よって、微小電流負荷回路を動作させ、再び前記放電終
止電圧まで端子電圧が低下したときに、微小電流負荷回
路を電池から解放するようにしたことを特徴とするバッ
クアップ回路。1. A main load circuit requiring a large current, a micro current load circuit driven by a micro current, a battery connected to the main load circuit and the micro current load circuit, and a terminal voltage of the battery are predetermined. And a discharge end voltage detection circuit for comparing the discharge end voltage of the battery, and when the terminal voltage of the battery to which the main load circuit and the minute current load circuit are connected is reduced to the discharge end voltage, The load circuit is released from the battery, the minute current load circuit is operated by the terminal voltage of the battery increased by the release of the main load circuit, and when the terminal voltage decreases again to the discharge cutoff voltage, the minute current load circuit is turned on. A backup circuit characterized by being released from the battery.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59039810A JPH0628489B2 (en) | 1984-03-01 | 1984-03-01 | Backup circuit |
| KR1019850001073A KR900002452B1 (en) | 1984-03-01 | 1985-02-21 | Back-up circuit for an electric cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59039810A JPH0628489B2 (en) | 1984-03-01 | 1984-03-01 | Backup circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60183945A JPS60183945A (en) | 1985-09-19 |
| JPH0628489B2 true JPH0628489B2 (en) | 1994-04-13 |
Family
ID=12563318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59039810A Expired - Lifetime JPH0628489B2 (en) | 1984-03-01 | 1984-03-01 | Backup circuit |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH0628489B2 (en) |
| KR (1) | KR900002452B1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6370236U (en) * | 1986-10-27 | 1988-05-11 | ||
| JP6195783B2 (en) * | 2013-11-15 | 2017-09-13 | シャープ株式会社 | Battery-powered electronics |
| JP6294102B2 (en) * | 2014-02-28 | 2018-03-14 | シャープ株式会社 | Battery-powered electronics |
| JP6417489B2 (en) * | 2018-02-13 | 2018-11-07 | シャープ株式会社 | Battery-powered electronics |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5484913A (en) * | 1977-12-20 | 1979-07-06 | Fujitsu Ltd | Radio relay unit |
| JPS5713933A (en) * | 1980-06-24 | 1982-01-25 | Tokyo Shibaura Electric Co | Dc power source circuit switching device |
-
1984
- 1984-03-01 JP JP59039810A patent/JPH0628489B2/en not_active Expired - Lifetime
-
1985
- 1985-02-21 KR KR1019850001073A patent/KR900002452B1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| KR900002452B1 (en) | 1990-04-14 |
| KR850006661A (en) | 1985-10-14 |
| JPS60183945A (en) | 1985-09-19 |
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