JPH08172733A - Power-supply circuit - Google Patents
Power-supply circuitInfo
- Publication number
- JPH08172733A JPH08172733A JP6333910A JP33391094A JPH08172733A JP H08172733 A JPH08172733 A JP H08172733A JP 6333910 A JP6333910 A JP 6333910A JP 33391094 A JP33391094 A JP 33391094A JP H08172733 A JPH08172733 A JP H08172733A
- Authority
- JP
- Japan
- Prior art keywords
- secondary batteries
- secondary battery
- power supply
- battery
- external 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.)
- Withdrawn
Links
Landscapes
- Stand-By Power Supply Arrangements (AREA)
- 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、ＮｉＣａｄやＮｉＭＨ
などの二次電池を電源として使用し、必要に応じてＡＣ
アダプタ等の外部電源を接続してシステムを動作または
上記二次電池を充電するシステムの電源回路に関し、特
に二組の二次電池を並列に接続して使用するシステムの
電源回路に関する。The present invention relates to NiCad and NiMH.
Use a secondary battery such as
The present invention relates to a power supply circuit of a system for connecting an external power supply such as an adapter to operate the system or charging the secondary battery, and particularly to a power supply circuit of a system in which two sets of secondary batteries are connected in parallel.
【０００２】[0002]
【従来の技術】ノートブックパソコンや携帯型通信端末
などでは、電源として二次電池を使用する。これらは通
常ＡＣアダプタ等を接続して使用でき、また、上記の二
次電池を充電する仕組みになっている。これらのシステ
ムのうちには二次電池を二組使用し、電池動作時間を長
時間化したり、電池動作中に二組の二次電池のうちの一
組を交換可能にしたものがある。2. Description of the Related Art A notebook computer, a portable communication terminal or the like uses a secondary battery as a power source. These can usually be used by connecting an AC adapter or the like, and have a mechanism for charging the above secondary battery. Among these systems, there are systems that use two sets of secondary batteries to prolong the battery operating time or to replace one of the two sets of secondary batteries during battery operation.
【０００３】[0003]
【発明が解決しようとする課題】この種の二組の二次電
池を使用するシステムでは、これらを並列に接続してお
り、充電の際には、二つの充電回路が必要であった（一
つの充電回路に二組以上の二次電池を並列に接続するこ
とはできない。）。また、外部電源には二組の二次電池
を充電するに足りる電流容量が必要となり、コネクタや
ケーブルにも耐電流性の高いものが要求されるという欠
点があった（ケーブルやコネクタの信頼性は電圧よりも
電流に依存し、高電流になるほど信頼性が低下す
る。）。また、充電回路を一つとして一組ずつ充電する
方式もあるが、充電時間が二倍かかるという欠点があっ
た。In a system using two sets of secondary batteries of this type, these are connected in parallel, and two charging circuits are required for charging (one It is not possible to connect more than one set of secondary batteries in parallel to one charging circuit). In addition, the external power supply must have sufficient current capacity to charge two sets of rechargeable batteries, and the connector and cable must also have high current resistance (the reliability of the cable and connector is high. Depends on the current rather than the voltage, and the higher the current, the lower the reliability.) There is also a method of charging one set with one charging circuit, but it has a drawback that it takes twice as long as the charging time.
【０００４】そこで、この発明は、充電回路を一回路と
してコストと実装面積を削減し、充電時間、及び外部電
源やケーブル、コネクタ類の電流容量も一組分ですます
ことができる電源回路を提供することを目的とする。Therefore, the present invention provides a power supply circuit which can reduce the cost and the mounting area by using the charging circuit as one circuit, and can increase the charging time and the current capacity of the external power supply, cables and connectors by one set. The purpose is to do.
【０００５】[0005]
【課題を解決するための手段】本発明は、上記課題を解
決するために、システムの電池動作中は二組の二次電池
を並列に接続し、ＡＣアダプタ等外部電源を接続した際
には上記の二次電池を直列に接続し直す手段を有する。
また、充電回路（二次電池が満充電されたことを検出
し、充電を終了する）は一組分のみ有し、外部電源は直
列接続した二組の二次電池を充電し得る電圧（一組の場
合の二倍）と電流容量（一組の場合と同じ）を持つ。SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a method for connecting two sets of secondary batteries in parallel during system battery operation and connecting an external power source such as an AC adapter. It has means for reconnecting the above secondary batteries in series.
Also, the charging circuit (which detects that the secondary battery is fully charged and terminates charging) has only one set, and the external power supply has a voltage (one set that can charge two sets of secondary batteries connected in series). It has twice the number of pairs and the current capacity (same as the case of one pair).
【０００６】[0006]
【作用】システムが電池動作中は、二組の二次電池はス
イッチ手段により、並列に接続される。通常、この二組
を同時に使用すると一組ずつ順に使用する（第一の二次
電池が放電しきってから第二の二次電池を使用する）場
合に比べ、電池動作時間が延びる。また並列接続ゆえ、
片方の電池をはずしてもシステムは動作を続けることが
できるため、電池動作中に片方の電池交換が可能とな
る。一方、外部電源を使用した場合は二組の二次電池は
スイッチ手段により、直列に接続される。直列にした二
次電池の端子電圧をＶボルトとすると、これを充電する
ために外部電源の出力電圧は１．５Ｖボルト程度、二次
電池の個々のセルの電流容量をＣｍＡＨ（ミリアンペア
・アワー）とすると２時間充電の場合、外部電源に要求
される電流容量は理論的には０．５Ｃアンペア（実際に
はこれ以上必要）となる。また、充電回路は、直列に接
続した二次電池の端子電圧をモニターし、満充電を検出
して充電を終了させる。When the system is in battery operation, the two sets of secondary batteries are connected in parallel by the switch means. Usually, when these two sets are used at the same time, the battery operating time is extended as compared with the case where the sets are used one after another (the second secondary battery is used after the first secondary battery is completely discharged). Also, because of the parallel connection,
Since the system can continue to operate even if one battery is removed, one battery can be replaced while the battery is operating. On the other hand, when an external power source is used, the two sets of secondary batteries are connected in series by the switch means. When the terminal voltage of the secondary battery connected in series is V volt, the output voltage of the external power supply is about 1.5 V volt to charge this, and the current capacity of each cell of the secondary battery is CmAH (milliampere hour). Then, in the case of charging for 2 hours, the current capacity required for the external power source is theoretically 0.5 C amperes (actually, more than this is required). Further, the charging circuit monitors the terminal voltage of the secondary batteries connected in series, detects full charge, and terminates charging.
【０００７】[0007]
【実施例】次に図面を参照して本発明を説明する。図１
は本発明の一実施例の電源回路である。１は第一の二次
電池、２は第二の二次電池、３，４，５はスイッチであ
り、システムを電池動作させる際には３をＯＦＦ、４，
５をＯＮとして逆流防止用ダイオード１５，１６を介し
て１と２を並列に接続し、メインスイッチ１７を介して
ＤＣ／ＤＣコンバータ１８に入力される。ここでシステ
ム電源Ｖｃｃが生成されシステムに供給される。The present invention will be described below with reference to the drawings. FIG.
Is a power supply circuit according to an embodiment of the present invention. Reference numeral 1 is a first secondary battery, 2 is a second secondary battery, 3 and 4 and 5 are switches. When the system is operated by a battery, 3 is turned off, 4,
5 is turned on, 1 and 2 are connected in parallel via backflow prevention diodes 15 and 16, and input to a DC / DC converter 18 via a main switch 17. Here, the system power Vcc is generated and supplied to the system.
【０００８】一方、外部電源６を接続した際は３，５を
ＯＮ、４をＯＦＦとして１と２を直列接続する。６から
供給される直流電流は、コネクタ１３、ダイオード１４
を経て５，１，３，２，ＧＮＤの順に流れ、二次電池
１，２が充電される。７は充電回路であり、通常ＡＤコ
ンバータを内蔵したＭＣＵが使用される。７のポート８
がＡＤコンバータを有し、これにて満充電を検出し、５
をＯＦＦとして充電を終了させる。また６からの電流
は、１７がＯＮ時には１６，１７を介して１８に供給さ
れ、システムの動作に使用される。３，４，５の各スイ
ッチの開閉及び６の接続の検出はそれぞれ７のポート
９，１０，１２，１１により行われる。On the other hand, when the external power source 6 is connected, 3 and 5 are turned on, 4 is turned off, and 1 and 2 are connected in series. The DC current supplied from 6 is the connector 13 and the diode 14
Then, the secondary batteries 1 and 2 are charged in the order of 5, 1, 3, 2 and GND. Reference numeral 7 is a charging circuit, and an MCU having a built-in AD converter is usually used. Port 8 of 7
Has an AD converter, which detects full charge and
Is turned off to end charging. Further, the current from 6 is supplied to 18 via 16 and 17 when 17 is ON and used for the operation of the system. Opening and closing of each switch of 3, 4, 5 and detection of connection of 6 are performed by ports 9, 10, 12, 11 of 7, respectively.
【０００９】[0009]
【発明の効果】以上説明したように本発明によれば、二
組の二次電池を使用する利点、即ち、電池動作の長時間
化、電池動作中の片方の電池交換可能化という特徴を有
したまま、一組の二次電池を使用する場合と同じ充電回
路数、充電時間、コネクタ、ケーブル等の電流容量を実
現できる。As described above, according to the present invention, there are advantages of using two sets of secondary batteries, that is, the battery operation is prolonged and one battery can be replaced during battery operation. As it is, it is possible to realize the same number of charging circuits, charging time, current capacity of connectors, cables, etc. as when using a set of secondary batteries.
【図１】本発明の一実施例の電源回路である。FIG. 1 is a power supply circuit according to an embodiment of the present invention.
１ 第一の二次電池 ２ 第二の二次電池 ３ スイッチ ４ スイッチ ５ スイッチ ６ 外部電源 ７ ＭＣＵ ８ 満充電検出用ポート ９ スイッチ３制御ポート １０ スイッチ４制御ポート １１ 外部電源６検出ポート １２ スイッチ５制御ポート １３ 外部電源コネクタ １４，１５，１６ ダイオード １７ メインスイッチ １８ ＤＣ／ＤＣコンバータ 1 1st secondary battery 2 2nd secondary battery 3 switch 4 switch 5 switch 6 external power supply 7 MCU 8 full charge detection port 9 switch 3 control port 10 switch 4 control port 11 external power supply 6 detection port 12 switch 5 Control port 13 External power supply connector 14, 15, 16 Diode 17 Main switch 18 DC / DC converter
Claims (1)
使用するシステムに用いる電源装置において、前記二次
電池は第１及び第２の少なくとも２つの二次電池から成
るとともに、前記外部電源の接続状況に応じて動作する
切り替え手段を備え、前記切り替え手段によって、前記
システムを二次電池にて動作させる場合は前記第１及び
第２の二次電池を並列接続し、前記システムを前記外部
電源にて動作させる場合は前記第１及び第２の二次電池
を直列に接続する事を特徴とする電源回路。1. A power supply device for use in a system that switches between an external power supply and an internal secondary battery, wherein the secondary battery comprises at least two first and second secondary batteries, and A switching unit that operates according to a connection state is provided, and when the system is operated by a secondary battery by the switching unit, the first and second secondary batteries are connected in parallel, and the system is connected to the external power source. A power supply circuit characterized in that the first and second secondary batteries are connected in series when operated in accordance with the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6333910A JPH08172733A (en) | 1994-12-16 | 1994-12-16 | Power-supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6333910A JPH08172733A (en) | 1994-12-16 | 1994-12-16 | Power-supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08172733A true JPH08172733A (en) | 1996-07-02 |
Family
ID=18271330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6333910A Withdrawn JPH08172733A (en) | 1994-12-16 | 1994-12-16 | Power-supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08172733A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012108937A1 (en) * | 2011-02-11 | 2012-08-16 | Intel Corporation | Battery pack |
| JP2014168321A (en) * | 2013-02-28 | 2014-09-11 | Mitsumi Electric Co Ltd | Charge and discharge control circuit and charge and discharge control method |
| JP2015070628A (en) * | 2013-09-26 | 2015-04-13 | 富士重工業株式会社 | Vehicular power supply apparatus |
| CN110861498A (en) * | 2019-11-29 | 2020-03-06 | 安徽江淮汽车集团股份有限公司 | High-voltage charging circuit, method and device for electric automobile and electronic product |
-
1994
- 1994-12-16 JP JP6333910A patent/JPH08172733A/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012108937A1 (en) * | 2011-02-11 | 2012-08-16 | Intel Corporation | Battery pack |
| US9246340B2 (en) | 2011-02-11 | 2016-01-26 | Intel Corporation | Battery pack |
| JP2014168321A (en) * | 2013-02-28 | 2014-09-11 | Mitsumi Electric Co Ltd | Charge and discharge control circuit and charge and discharge control method |
| JP2015070628A (en) * | 2013-09-26 | 2015-04-13 | 富士重工業株式会社 | Vehicular power supply apparatus |
| CN110861498A (en) * | 2019-11-29 | 2020-03-06 | 安徽江淮汽车集团股份有限公司 | High-voltage charging circuit, method and device for electric automobile and electronic product |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20020305 |