JPH071984B2 - Battery power supply circuit - Google Patents
Battery power supply circuitInfo
- Publication number
- JPH071984B2 JPH071984B2 JP61282949A JP28294986A JPH071984B2 JP H071984 B2 JPH071984 B2 JP H071984B2 JP 61282949 A JP61282949 A JP 61282949A JP 28294986 A JP28294986 A JP 28294986A JP H071984 B2 JPH071984 B2 JP H071984B2
- Authority
- JP
- Japan
- Prior art keywords
- battery
- circuit
- output
- voltage
- power
- 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
- 238000001514 detection method Methods 0.000 claims description 11
- 238000010586 diagram Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
Landscapes
- Stand-By Power Supply Arrangements (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明によるバッテリーバックアップ電源回路は、ポー
タブルワープロやポータブルパソコン等に使用されるも
ので、交流を整流して得た通常の直流入力を受け入れる
手段とバッテリーとを有し、直流入力が一定時間低下す
るか、又は切断されても、正常な出力を得ることができ
る電源回路に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The battery backup power supply circuit according to the present invention is used in a portable word processor, a portable personal computer, etc., and is a means for accepting a normal DC input obtained by rectifying AC. The present invention relates to a power supply circuit which has a battery and a battery, and can obtain a normal output even when the DC input is reduced for a certain period of time or disconnected.
（従来の技術） 従来この種の回路は第２図に示すような回路方式を一般
的に採用していた。この第２図の回路では、スイッチ５
を介したバッテリー出力と直流入力とを、ダイオード１
及びダイオード２とから成る選択回路に入力し、電圧の
低くない方を選択して主制御回路７の入力及び副制御回
路８のバイアス電源として供給している。そこでオン・
オフ回路10からの信号を副制御回路８に与えることによ
り、主制御回路をオン・オフして直流出力をオン・オフ
しており、又バッテリーの電圧検出はスイッチ５を介し
てバッテリー電圧を電圧検出回路９に供給することによ
り行なっていた。(Prior Art) Conventionally, this kind of circuit generally employs a circuit system as shown in FIG. In the circuit of FIG. 2, the switch 5
Battery output and DC input via the diode 1
And a diode 2 are input to select the one having a lower voltage and supply it as the input of the main control circuit 7 and the bias power supply of the sub control circuit 8. Then turn on
By giving the signal from the OFF circuit 10 to the sub control circuit 8, the main control circuit is turned ON / OFF and the DC output is turned ON / OFF, and the battery voltage is detected by the switch 5 to detect the battery voltage. This is done by supplying to the detection circuit 9.
（発明が解決しようとする問題点） しかし第２図の回路では直流出力オフ時に、直流入力か
ら副制御回路に電流が流れ、またスイッチ５を通して電
圧検出回路９に電流が流れて無駄な電流を消費する。さ
らに直流入力及び直流出力がオフ時にスイッチ５をオン
しておくと、バッテリーから副制御回路８及び電圧検出
回路９に電流が流れ、バッテリーの電力を消耗してしま
うことになる。(Problems to be solved by the invention) However, in the circuit of FIG. 2, when the DC output is off, a current flows from the DC input to the sub control circuit, and a current flows to the voltage detection circuit 9 through the switch 5 to generate a wasteful current. Consume. Further, if the switch 5 is turned on when the direct current input and the direct current output are off, current will flow from the battery to the sub control circuit 8 and the voltage detection circuit 9, and the power of the battery will be consumed.
そこで、第２図の従来の電源回路では、直流入力及び直
流出力がオフの時には、スイッチ５を必ずオフにしてお
かねばならないが、操作がわずらわしく、万一忘れた場
合にはバッテリーが充電電力を失ってしまうという欠点
があった。Therefore, in the conventional power supply circuit shown in FIG. 2, the switch 5 must be turned off when the DC input and the DC output are off. However, the operation is troublesome, and if the battery is forgotten, the battery is charged with charging power. It had the drawback of being lost.
（問題点を解決するための手段） 前述の問題点を解決するために本発明が提供する手段
は、外部から直流電力を受ける端子と、バッテリーと、
前記直流電力を受け前記バッテリーに充電電流を供給す
る充電回路と、前記直流電力と前記バッテリーの出力と
を受けこれら両者のうちで電圧が低くない方の電力を出
力する選択回路と、この選択回路の出力の前記電力を受
け電圧が安定化された直流電力を出力する主制御回路
と、バイアス電圧が供給されたとき前記主制御回路を作
動状態による副制御回路と、前記バッテリーの出力に接
続された第１のスイッチ手段と、この第１のスイッチ手
段を介して前記バッテリー出力を受けそのバッテリー出
力の電圧が所定値以下であるときはアラーム信号を出力
する電圧検出回路と、前記選択回路の出力と前記副制御
回路の前記バイアス電圧の入力端子との間に介在させて
ある第２のスイッチ手段と、前記第１及び第２のスイッ
チ手段を同時に接または断にするスイッチ制御手段とを
備えることを特徴とする。(Means for Solving Problems) Means provided by the present invention in order to solve the above problems include a terminal for receiving DC power from the outside, a battery,
A charging circuit that receives the DC power and supplies a charging current to the battery, a selection circuit that receives the DC power and the output of the battery, and outputs the power of the one of which voltage is not low, and the selection circuit Connected to the output of the battery, a main control circuit for receiving the electric power of the output of the main body and outputting DC power whose voltage is stabilized, a sub-control circuit for operating the main control circuit when a bias voltage is supplied, A first switch means, a voltage detection circuit for receiving the battery output via the first switch means and outputting an alarm signal when the voltage of the battery output is below a predetermined value, and an output of the selection circuit. And a second switch means interposed between the bias voltage input terminal of the sub control circuit and the first and second switch means at the same time. It is characterized by having a switch control means for disconnection.
（実施例） 次に本発明について図面を参照して説明する。(Example) Next, this invention is demonstrated with reference to drawings.
第１図は本発明の一実施例を示すブロック回路図であ
る。本実施例は、入力として直流を受け安定化した直流
出力を得るための主制御回路７と、直流入力からバッテ
リー11に電流を流し充電する充電回路６と、直流入力ま
たはバッテリー11からバイアス電源を供給すると動作し
主制御回路９を動作させる副制御回路８と、バッテリー
11の電圧を検出し、これが異常に低下した時バッテリー
アラーム信号を送出する電圧検出回路９と、副制御回路
８のバイアス電源をオン・オフする手段であるPNPトラ
ンジスタ４と、電圧検出回路９へ供給する検出電圧をオ
ン・オフする手段であるPNPトランジスタ３と、直流入
力とバッテリー出力との電圧の低くない方を選択して主
制御回路７に加えるダイオード１及びダイオード２とか
ら成る選択回路と、PNPトランジスタ3,4をオンかオフに
切り替えるオン・オフ回路10とで構成されている。FIG. 1 is a block circuit diagram showing an embodiment of the present invention. In this embodiment, a main control circuit 7 for receiving a direct current as an input to obtain a stabilized direct current output, a charging circuit 6 for supplying a current to the battery 11 from the direct current input to charge the battery 11, and a bias power source from the direct current input or the battery 11 are provided. A sub-control circuit 8 that operates when supplied and operates a main control circuit 9, and a battery
To the voltage detection circuit 9, which detects the voltage of 11 and sends out a battery alarm signal when it abnormally drops, the PNP transistor 4 which is means for turning on and off the bias power supply of the sub-control circuit 8, and the voltage detection circuit 9. A PNP transistor 3 which is a means for turning on / off the detection voltage to be supplied, and a selection circuit including a diode 1 and a diode 2 which select the one having a lower voltage between the DC input and the battery output and add it to the main control circuit 7. , And an on / off circuit 10 for switching the PNP transistors 3 and 4 on or off.
次に本実施例の動作を説明する。通常は直流入力が供給
されており、この状態でオン・オフ回路10からオン信号
を出すとPNPトランジスタ４が導通し、副制御回路８に
はダイオード１を通してバイアス電源が供給される。こ
のとき一般にバッテリーの電圧の方が直流入力電圧より
低いからダイオード２には電流は流れない。副制御回路
８にバイアス電源が供給されると副制御回路８が動作
し、主制御回路７は駆動され直流出力が現れる。オン・
オフ回路10からオン信号が出力された時、同時にPNPト
ランジスタ３もオンされ、電圧検出回路９にバッテリー
電圧が供給され、バッテリー電圧は監視状態になる。又
バッテリー11は充電回路６を通して充電される。次にオ
ン・オフ回路10からオフ信号が出力されるとPNPトラン
ジスタ3,4が共にオフとなり、上記とは逆に直流出力は
オフとなり、バッテリー電圧は非監視状態となる。この
時PNPトランジスタ3,4はオフとなり、また主制御回路７
にも電流が流れないから、オン・オフ回路10をオフとし
たいわゆる電源オフ時に無駄な電力を消費することは無
い。本実施例において、オン・オフ回路10がオンされて
いてPNPトランジスタ3,4がオンのときに、直流入力が無
い場合や直流入力電圧が異常に低下した場合には、バッ
テリー11からダイオード２を通して電圧が主制御回路７
等に供給され、充電回路６が機能しない他、動作は上述
と全く同一である。この場合でもやはりオン・オフ回路
10をオフといた電源オフ時にはバッテリー11からは全く
電流が流れず、バッテリー11が電力を放出してしまっ
て、いわゆるバッテリー上りになるおそれはない。Next, the operation of this embodiment will be described. Normally, a DC input is supplied, and when an ON signal is output from the ON / OFF circuit 10 in this state, the PNP transistor 4 becomes conductive, and the sub control circuit 8 is supplied with bias power through the diode 1. At this time, since the voltage of the battery is generally lower than the DC input voltage, no current flows through the diode 2. When bias power is supplied to the sub control circuit 8, the sub control circuit 8 operates, the main control circuit 7 is driven, and a DC output appears. on·
When the ON signal is output from the OFF circuit 10, the PNP transistor 3 is also turned ON at the same time, the battery voltage is supplied to the voltage detection circuit 9, and the battery voltage enters the monitoring state. The battery 11 is charged through the charging circuit 6. Next, when an off signal is output from the on / off circuit 10, both the PNP transistors 3 and 4 are turned off, the DC output is turned off contrary to the above, and the battery voltage is not monitored. At this time, the PNP transistors 3 and 4 are turned off, and the main control circuit 7
However, since no current flows, no unnecessary power is consumed when the on / off circuit 10 is turned off, that is, when the power is turned off. In the present embodiment, when the on / off circuit 10 is turned on and the PNP transistors 3 and 4 are turned on, when there is no DC input or when the DC input voltage is abnormally lowered, the battery 11 is passed through the diode 2 Voltage is the main control circuit 7
The charging circuit 6 does not function, and the operation is exactly the same as described above. Even in this case, the on / off circuit
When the power is turned off when 10 is turned off, no current flows from the battery 11 and the battery 11 releases electric power, so that there is no possibility that the battery goes up.
なお、第１図においてはトランジスタ3,4としてPNPトラ
ンジスタを使用した例を示してあるが、本発明はNPNト
ランジスタを使用し、エミッタとコレクタへの接続を逆
にし、オン・オフ回路10より送出される信号の位相を逆
にすれば、同様に実現できる。Although FIG. 1 shows an example in which PNP transistors are used as the transistors 3 and 4, the present invention uses NPN transistors and reverses the connection to the emitter and collector, and outputs from the on / off circuit 10. The same can be achieved by reversing the phase of the signal to be processed.
（発明の効果） 以上説明したように本発明は、副制御回路８のバイアス
電源供給をトランジスタスイッチを介して行なうと共
に、バッテリー電圧検出回路９へのバッテリー電圧供給
もトランジスタスイッチを介して行ない、電源のオン・
オフは上記の２つのトランジスタをオン・オフすること
のみによって行なうことにより、簡単且つ安価な回路
で、さらに機械的なスイッチ等特別なわずらわしい操作
をしないで、電源オフ時に無駄な電力消費が無く、いわ
ゆるバッテリー上りのおそれも一切無いバッテリーバッ
クアップ電源回路を提供できる。(Effect of the Invention) As described above, according to the present invention, the bias power supply of the sub-control circuit 8 is performed through the transistor switch, and the battery voltage is supplied to the battery voltage detection circuit 9 through the transistor switch. On
By turning off and turning on the above two transistors only, the circuit is simple and inexpensive, and there is no need for special troublesome operations such as mechanical switches. It is possible to provide a battery backup power supply circuit that does not have a so-called battery exhaustion.
本発明にはこのような効果がある。The present invention has such an effect.
第１図は本発明のバッテリーバックアップ電源回路の一
実施例を示すブロック回路図、第２図は従来のバッテリ
ーバックアップ電源回路の例を示すブロック回路図であ
る。 1,2……ダイオード、3,4……PNPトランジスタ、５……
スイッチ、６……充電回路、７……主制御回路、８……
副制御回路、９……電圧検出回路、10……オン・オフ回
路、11……バッテリー。FIG. 1 is a block circuit diagram showing an embodiment of a battery backup power supply circuit of the present invention, and FIG. 2 is a block circuit diagram showing an example of a conventional battery backup power supply circuit. 1,2 …… Diode, 3,4 …… PNP transistor, 5 ……
Switch, 6 ... Charging circuit, 7 ... Main control circuit, 8 ...
Sub-control circuit, 9 ... voltage detection circuit, 10 ... on / off circuit, 11 ... battery.
Claims (1)
リーと、前記直流電力を受け前記バッテリーに充電電流
を供給する充電回路と、前記直流電力と前記バッテリー
の出力とを受けこれら両者のうちで電圧が低くない方の
電力を出力する選択回路と、この選択回路の出力の前記
電力を受け電圧が安定化された直流電力を出力する主制
御回路と、バイアス電圧が供給されたとき前記主制御回
路を作動状態による副制御回路と、前記バッテリーの出
力に接続された第１のスイッチ手段と、この第１のスイ
ッチ手段を介して前記バッテリー出力を受けそのバッテ
リー出力の電圧が所定値以下であるときはアラーム信号
を出力する電圧検出回路と、前記選択回路の出力と前記
副制御回路の前記バイアス電圧の入力端子との間に介在
させてある第２のスイッチ手段と、前記第１及び第２の
スイッチ手段を同時に接または断にするスイッチ制御手
段とを備えることを特徴とするバッテリーバックアップ
電源回路。1. A terminal for receiving DC power from the outside, a battery, a charging circuit for receiving the DC power and supplying a charging current to the battery, and a unit for receiving the DC power and the output of the battery. A selection circuit that outputs the power whose voltage is not low, a main control circuit that outputs the DC power whose voltage is stabilized by receiving the power of the output of this selection circuit, and the main control when a bias voltage is supplied. A sub-control circuit according to the operating state of the circuit, a first switch means connected to the output of the battery, the battery output via the first switch means, and the voltage of the battery output is below a predetermined value. In this case, the voltage detection circuit that outputs an alarm signal, and the second output that is interposed between the output of the selection circuit and the input terminal of the bias voltage of the sub-control circuit. Switch means and the battery backup power supply circuit, characterized in that it comprises a switch control means for simultaneously contacting or cross the first and second switch means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61282949A JPH071984B2 (en) | 1986-11-26 | 1986-11-26 | Battery power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61282949A JPH071984B2 (en) | 1986-11-26 | 1986-11-26 | Battery power supply circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63136929A JPS63136929A (en) | 1988-06-09 |
| JPH071984B2 true JPH071984B2 (en) | 1995-01-11 |
Family
ID=17659205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61282949A Expired - Lifetime JPH071984B2 (en) | 1986-11-26 | 1986-11-26 | Battery power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH071984B2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59154780A (en) * | 1983-02-21 | 1984-09-03 | Nec Corp | Check circuit for battery voltage |
| JPS6013429A (en) * | 1983-07-05 | 1985-01-23 | 日本電気株式会社 | Battery voltage drop detecting circuit |
-
1986
- 1986-11-26 JP JP61282949A patent/JPH071984B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63136929A (en) | 1988-06-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |