JP3510666B2 - Charging circuit - Google Patents
Charging circuitInfo
- Publication number
- JP3510666B2 JP3510666B2 JP08055894A JP8055894A JP3510666B2 JP 3510666 B2 JP3510666 B2 JP 3510666B2 JP 08055894 A JP08055894 A JP 08055894A JP 8055894 A JP8055894 A JP 8055894A JP 3510666 B2 JP3510666 B2 JP 3510666B2
- Authority
- JP
- Japan
- Prior art keywords
- charging
- resistor
- circuit
- transistor
- voltage
- 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 - Fee Related
Links
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Stand-By Power Supply Arrangements (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、二次電池を備え必要に
応じて充放電を繰り返す充電回路に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charging circuit that includes a secondary battery and repeats charging and discharging as needed.
【０００２】[0002]
【従来の技術】従来のこの種の充電回路は、例えば図２
に示したように直流電源間に抵抗２０、抵抗２１、ダイ
オード２２、ダイオード２３、ダイオード２４、バナジ
ウムリチウム電池等の二次電池２５及び負荷２６を接続
した充電回路、図３に示したように直流電源間に抵抗２
７、抵抗２８、ダイオード２９、二次電池２５を接続し
た充電回路、図４に示したように直流電源間に抵抗３
０、ツエナーダイオード３１、ダイオード３２、ダイオ
ード３３、ダイオード３４、二次電池２５及び負荷２６
を接続した充電回路、図５に示したように直流電源間に
抵抗３５、抵抗３６、抵抗３７、トランジスタ３８、二
次電池２５及び負荷２６を接続してトランジスタで充電
を制御するようにした充電回路が提供されている。2. Description of the Related Art A conventional charging circuit of this type is shown in FIG.
A charging circuit in which a resistor 20, a resistor 21, a diode 22, a diode 23, a diode 24, a secondary battery 25 such as a vanadium lithium battery, and a load 26 are connected between DC power sources as shown in FIG. Resistance 2 between power supplies
7, a resistor 28, a diode 29, a charging circuit in which a secondary battery 25 is connected, and as shown in FIG.
0, Zener diode 31, diode 32, diode 33, diode 34, secondary battery 25 and load 26
A charging circuit in which a resistor 35, a resistor 36, a resistor 37, a transistor 38, a secondary battery 25, and a load 26 are connected between DC power sources as shown in FIG. 5, and charging is controlled by the transistor. A circuit is provided.
【０００３】そして、上記各充電回路への直流電源の供
給時には負荷２６に直流電力が供給されると共に二次電
池２５に充電される。また、例えば停電時には二次電池
２５から負荷２６に電力が供給される。そして、電源の
切換は図２乃至図４の充電回路においてはダイオードに
よって行われ、図５の充電回路においてはトランジスタ
によって行われる。When the DC power is supplied to the charging circuits, the load 26 is supplied with DC power and the secondary battery 25 is charged. Further, for example, during a power failure, the secondary battery 25 supplies power to the load 26. Switching of the power source is performed by the diode in the charging circuit of FIGS. 2 to 4, and is performed by the transistor in the charging circuit of FIG.
【０００４】[0004]
【発明が解決しようとする課題】上記従来の技術におい
て、図２乃至図４に示された充電回路においてはダイオ
ード２２、ダイオード２９、あるいはダイオード３２を
介して負荷２６に電圧が印加されるため、ダイオードの
順方向電圧だけ電圧降下（例えば約０．７ボルト）が発
生し、負荷２６に印加される電圧が低下するという問題
が発生する。In the above-mentioned conventional technique, since the voltage is applied to the load 26 via the diode 22, the diode 29, or the diode 32 in the charging circuit shown in FIGS. 2 to 4, A voltage drop (for example, about 0.7 V) is generated by the forward voltage of the diode, which causes a problem that the voltage applied to the load 26 is decreased.
【０００５】また、図５に示された充電回路においては
負荷２６に印加される電圧と充電電圧とが同じであるた
め、直流電源からの電力の供給時に直流電源の電圧が必
要な負荷に使用できないという問題が発生する。さら
に、二次電池の充電と放電との切換を直流電源の電圧低
下のみで行うため、他の信号で切換を制御することがで
きないという問題が発生する。Further, in the charging circuit shown in FIG. 5, since the voltage applied to the load 26 is the same as the charging voltage, it is used for a load that requires the voltage of the DC power supply when the power is supplied from the DC power supply. There is a problem that you can not. Further, since switching between charging and discharging of the secondary battery is performed only by lowering the voltage of the DC power source, there is a problem that switching cannot be controlled by other signals.
【０００６】本発明は、負荷に印加される電圧の電源電
圧からの降下が少なく直流電源の電圧とほぼ等しい電圧
を負荷に印可することができ、且つ充電回路を使用した
制御装置などに最適なタイミングで負荷への電力供給源
を切り換えるようにした充電回路を提供することを目的
とする。INDUSTRIAL APPLICABILITY The present invention is suitable for a control device or the like that uses a charging circuit and that can apply a voltage to the load that is substantially the same as the voltage of the DC power supply with a small drop from the power supply voltage. An object of the present invention is to provide a charging circuit capable of switching a power supply source to a load at a timing.
【０００７】[0007]
【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、請求項１の発明の充電回路は、充電するか
放電するかを判断して信号を出力する判別回路と、コレ
クタが第１抵抗に接続され、ベースが前記判別回路に第
２抵抗を介して接続されると共に第３抵抗を介してグラ
ンド線に接続され、エミッタがグランド線に接続された
第１のトランジスタと、ベースが第１抵抗を介して第１
のトランジスタのコレクタに接続され、エミッタが電源
供給線に接続され、且つコレクタが負荷に接続されると
共に第１の充電電流及び充電電圧制限用の第４抵抗を介
して二次電池に接続される第２のトランジスタと、第１
の充電電流及び充電電圧制限用の第４抵抗と二次電池と
の中点と、第１のトランジスタのコレクタとの間に接続
された第２の充電電流及び充電電圧制限用の第５抵抗と
を備えた充電回路を提供するものである。The present invention SUMMARY OF] In order to solve the above problems, the charging circuit of the invention of claim 1 includes a determination circuit for outputting a signal to determine whether to discharge or charge, Kore
Is connected to the first resistor, and the base is connected to the discrimination circuit.
It is connected via a second resistor and connected via a third resistor.
A first transistor connected to the ground line and an emitter connected to the ground line, and a first transistor connected to the base via a first resistor.
Is connected to the collector of the transistor, the emitter is connected to the power supply line, the collector is connected to the load , and is connected to the secondary battery through the first resistor for limiting the first charging current and the charging voltage. The second transistor and the first
The midpoint of the charging current and the fourth resistor and the secondary battery for charging voltage limit, and the second charging current and a fifth resistor for charging voltage limit that is connected between the collector of the first transistor And a charging circuit provided with.
【０００８】また、請求項２の充電回路は、充電するか
放電するかを判断して充電時に信号を出力する判別回路
と、この判別回路に接続される信号入力端子、電源に接
続される電源入力端子、前記電源のグランドに接続され
るグランド入力端子、前記信号入力端子からの信号でＯ
Ｎ／ＯＦＦされるスイッチング回路によって電力を供給
する電源出力端子、グランド出力端子および前記第１の
トランジスタのコレクタに接続される端子を備え前記判
別回路からの信号によってＯＮして電源出力端子から電
力を供給するスイッチング回路と、このスイッチング回
路の電源出力端子とグランド出力端子との間に接続され
た第１の充電電流及び充電電圧制限用の第４抵抗と二次
電池との直列回路及び負荷と、前記直列回路の中点とス
イッチング回路の前記第１のトランジスタのコレクタに
接続される端子との間に接続された第２の充電電流及び
充電電圧制限用の第５抵抗を備えた充電回路を提供する
ものである。The charging circuit according to the second aspect of the present invention includes a discrimination circuit that determines whether to charge or discharge and outputs a signal during charging, a signal input terminal connected to the discrimination circuit, and a power supply connected to a power supply. O from the signal from the input terminal, the ground input terminal connected to the ground of the power source, and the signal input terminal
Power is supplied by a switching circuit that is turned off / on
The power output terminal, the ground output terminal and the first
A switching circuit which has a terminal connected to the collector of the transistor and which is turned on by a signal from the discrimination circuit to supply power from a power supply output terminal; and a power supply output terminal and a ground output terminal of the switching circuit. A series circuit and a load of a fourth resistor for limiting a first charging current and a charging voltage connected between the secondary battery and a load, a midpoint of the series circuit and a collector of the first transistor of a switching circuit.
It is intended to provide a charging circuit including a second resistance for connecting a second charging current and a charging voltage, which is connected to a terminal to be connected .
【０００９】[0009]
【作用】請求項１の発明の充電回路によれば、直流電源
から充電電力が供給されているときには、負荷に供給さ
れる電圧降下は第２のトランジスタによる微小な電圧の
みなため、直流電源の電圧とほぼ等しい電圧を負荷に供
給することが可能になる。また、二次電池の充電が行わ
れており、二次電池の電圧が充電電圧まで達していない
ときにも、負荷には直流電源電力の電圧とほぼ等しい電
圧を供給することができる。According to the charging circuit of the present invention, when the charging power is supplied from the DC power supply, the voltage drop supplied to the load is only a minute voltage due to the second transistor. It becomes possible to supply the load with a voltage substantially equal to the voltage. Further, even when the secondary battery is being charged and the voltage of the secondary battery has not reached the charging voltage, the load can be supplied with a voltage substantially equal to the voltage of the DC power supply.
【００１０】また、請求項２の充電回路によれば、二次
電池への充電も平行して行われる電源から負荷への電力
の供給と二次電池から負荷への電力の供給との切換には
スイッチング回路を使用し二次電池の充電のための電流
制限及び充電電圧の制限は第１の充電電流及び充電電圧
制限用の抵抗と第２の充電電流及び充電電圧制限用の抵
抗とによって行っているため、充電回路の構成を簡略化
することができる。Further, according to the charging circuit of the second aspect, charging of the secondary battery is performed in parallel, and switching between power supply from the power source to the load and power supply from the secondary battery to the load is performed. Is a switching circuit, and the current limit and charge voltage limit for charging the secondary battery are performed by a first charge current and charge voltage limit resistor and a second charge current and charge voltage limit resistor. Therefore, the configuration of the charging circuit can be simplified.
【００１１】また、負荷への電力供給の切換を判別回路
からスイッチング回路への信号の有無によって行ってい
るので、充放電回路を使用するシステムに最適なタイミ
ングで切換を行うことが可能になる。Further, since the switching of the power supply to the load is performed depending on the presence / absence of a signal from the determination circuit to the switching circuit, the switching can be performed at the optimum timing for the system using the charge / discharge circuit.
【００１２】[0012]
【実施例】以下、本発明の実施例を図面に基づいて詳細
に説明する。図１は本発明の充放電回路の一実施例を示
し、１は直流電源から電力が供給されるスイッチング回
路、２は例えば停電検知回路等の充電するか放電するか
を判別して信号を出力する充放電判別回路、３は例えば
空気調和機等のマイコン制御盤の半導体メモリ（スタテ
ィックＲＡＭ）あるいは電子時計等の負荷である。Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 shows an embodiment of a charging / discharging circuit of the present invention, 1 is a switching circuit to which electric power is supplied from a DC power source, 2 is a signal for determining whether to charge or discharge a power failure detection circuit, for example. The charging / discharging discrimination circuit 3 is a semiconductor memory (static RAM) of a microcomputer control panel of an air conditioner or a load of an electronic timepiece.
【００１３】以下、スイッチング回路について詳細に説
明する。４は第１のトランジスタ、５は第２のトランジ
スタ、６は第１の抵抗、７は第２の抵抗、８は第３の抵
抗、９は電源線、１０は信号線、１１はグランド線であ
る。電源線９は電源入力端子１２に接続され、信号線１
０は信号入力端子１３を介して充放電判別回路２に接続
されている。また、第１のトランジスタ４のベースは第
２の抵抗７を介して信号入力端子１３に接続されるとと
もに第３の抵抗８を介してグランド線１１に接続され、
コレクタは第１の抵抗を介して第２のトランジスタ５の
ベースに接続され、さらにエミッタはグランド線１１に
接続されている。また、第２のトランジスタ５のエミッ
タは電源線９に接続され、コレクタは電源線１４を介し
て負荷３に接続されている。The switching circuit will be described in detail below. 4 is a first transistor, 5 is a second transistor, 6 is a first resistor, 7 is a second resistor, 8 is a third resistor, 9 is a power line, 10 is a signal line, and 11 is a ground line. is there. The power line 9 is connected to the power input terminal 12, and the signal line 1
0 is connected to the charge / discharge determination circuit 2 via the signal input terminal 13. Further, the base of the first transistor 4 is connected to the signal input terminal 13 via the second resistor 7, and is connected to the ground line 11 via the third resistor 8,
The collector is connected to the base of the second transistor 5 via the first resistor, and the emitter is connected to the ground line 11. The emitter of the second transistor 5 is connected to the power supply line 9, and the collector is connected to the load 3 via the power supply line 14.
【００１４】さらに、１５はスイッチング回路１と負荷
３との間に接続された例えばバナジウムリチウム電池な
どの二次電池、１６は二次電池の充電電流及び充電電圧
制限用の抵抗（以下第４抵抗という）、１７は二時電池
の充電電流及び充電電圧制限用の抵抗（以下第５抵抗と
いう）である。第４抵抗１６と二次電池１５とは電源線
１４とグランド線１１との間に直列に接続され、第５抵
抗１７は第４抵抗１６と二次電池１５との中点２０と、
第１抵抗６と第１のトランジスタ４のコレクタとの中点
２１との間に接続されている。Further, 15 is a secondary battery such as a vanadium lithium battery connected between the switching circuit 1 and the load 3, and 16 is a resistor for limiting the charging current and charging voltage of the secondary battery (hereinafter referred to as a fourth resistor). 17) is a resistance (hereinafter referred to as a fifth resistance) for limiting the charging current and charging voltage of the two-hour battery. The fourth resistor 16 and the secondary battery 15 are connected in series between the power supply line 14 and the ground line 11, and the fifth resistor 17 is a midpoint 20 between the fourth resistor 16 and the secondary battery 15 .
It is connected between the first resistor 6 and the midpoint 21 of the collector of the first transistor 4.
【００１５】以下、上記充放電装置の動作について説明
する。例えば停電が発生していなく、充放電判別回路２
が信号を出力しているときには、第１のトランジスタ４
にベース電流が流れてコレクタ電流も流れ、第１のトラ
ンジスタ４はＯＮである。ここで、第１のトランジスタ
４のコレクタ電流が第２のトランジスタ５のベース電流
であり、第２のトランジスタ５はＯＮしており、電流が
電源入力端子１２から第２のトランジスタ５を流れ、電
力が負荷３に供給される。このとき、負荷３にかかる電
圧は電源電圧、即ち電源入力端子１２とグランド線１１
との間の電圧（例えば５ボルト）から第１トランジスタ
５のコレクタ・エミッタ電圧を引いた電圧である。そし
て、第１トランジスタ５のコレクタ・エミッタ電圧は例
えばほぼ０．１ボルトであり、低いため、負荷３にかか
る電圧はほぼ電源電圧に等しい。The operation of the charging / discharging device will be described below. For example, a power failure has not occurred, and the charge / discharge determination circuit 2
Is outputting a signal, the first transistor 4
The base current and collector current also flow to the first transistor 4 and the first transistor 4 is ON. Here, the collector current of the first transistor 4 is the base current of the second transistor 5, the second transistor 5 is ON, and the current flows from the power supply input terminal 12 through the second transistor 5 to generate power. Are supplied to the load 3. At this time, the voltage applied to the load 3 is the power supply voltage, that is, the power supply input terminal 12 and the ground line 11.
It is a voltage obtained by subtracting the collector-emitter voltage of the first transistor 5 from the voltage (for example, 5 V) between and. The collector-emitter voltage of the first transistor 5 is, for example, about 0.1 volt, which is low, so that the voltage applied to the load 3 is substantially equal to the power supply voltage.
【００１６】また、第２のトランジスタ５を通った電流
の一部は第４の抵抗１６を介して二次電池１５に流れ、
二次電池１５は充電される。さらに、第４の抵抗１６を
通過した電流の一部は第５の抵抗１７を介して第１のト
ランジスタ４に流れ、第１の抵抗６を通過した電流と共
に第１のトランジスタ４からグランド線１１へ流れる。
そして、二次電池１５の充電が進み、二次電池１５の電
圧、即ち中点２０の電圧は次第に高くなる。そして、第
４の抵抗１６に流れる電流を次第に低下し、第５の抵抗
１７に流れる電流次第に増加する。第４の抵抗１６及び
第５の抵抗１７は中点２０の電圧即ち、二次電池１５の
充電電圧を規定すると共に充電電流を制限するものであ
り、第４の抵抗１６は第５の抵抗１７と分圧回路を形成
するので、二次電池１５のにかかる電圧Ｖは第４の抵抗
１６の抵抗値をＲ１、第５の抵抗１７の抵抗値をＲ２と
し、直流電源の電圧をＶ１とすると、Further, a part of the current passing through the second transistor 5 flows to the secondary battery 15 through the fourth resistor 16,
The secondary battery 15 is charged. Further, part of the current that has passed through the fourth resistor 16 flows to the first transistor 4 through the fifth resistor 17, and together with the current that has passed through the first resistor 6, from the first transistor 4 to the ground line 11 Flows to.
Then, the charging of the secondary battery 15 progresses, and the voltage of the secondary battery 15, that is, the voltage of the midpoint 20 gradually increases. Then, the current flowing through the fourth resistor 16 gradually decreases, and the current flowing through the fifth resistor 17 gradually increases. The fourth resistor 16 and the fifth resistor 17 define the voltage at the midpoint 20, that is, the charging voltage of the secondary battery 15 and limit the charging current, and the fourth resistor 16 is the fifth resistor 17 Since the voltage dividing circuit is formed with the voltage V applied to the secondary battery 15, the resistance value of the fourth resistor 16 is R1, the resistance value of the fifth resistor 17 is R2, and the voltage of the DC power supply is V1. ,
【００１７】[0017]
【数１】
となり、この電圧が二次電池１５の充電電圧（例えば
３．５ボルト）より高くならないように第４の抵抗１６
と第５の抵抗１７との抵抗値は予め設定される。ここ
で、第１のトランジスタ４と第２のトランジスタ５との
コレクタ・エミッタ電圧は極僅かなため、各トランジス
タによる電圧降下は無視した。[Equation 1] Therefore, the fourth resistor 16 prevents the voltage from becoming higher than the charging voltage of the secondary battery 15 (for example, 3.5 V).
And the resistance values of the fifth resistor 17 are preset. Here, since the collector-emitter voltages of the first transistor 4 and the second transistor 5 are extremely small, the voltage drop due to each transistor is ignored.
【００１８】充電が進み中点２０の電圧が二次電池１５
の充電電圧（例えば３．５ボルト）になると、二次電池
１５には殆ど電流が流れなくなる。また、例えば停電が
発生し、充放電判別回路２が信号を出力していないとき
には、第１のトランジスタ４にベース電流が流れないた
め、第１のトランジスタ４はＯＦＦである。そして、第
２のトランジスタ５もＯＦＦであり、電源入力端子１２
から電力が負荷３に供給されない。そして、電力は二次
電池１５から第４の抵抗１６を介して負荷３に供給され
る。このとき、負荷３が消費する電力は僅かであり、電
流は微小なため第４の抵抗１６での電圧降下も極僅かで
ある。また、第１のトランジスタ４はＯＦＦしているた
め、コレクタに接続された第５の抵抗１７を介して第１
のトランジスタ４に流れる電流は微小である。As the charging proceeds, the voltage at the midpoint 20 is the secondary battery 15
At the charging voltage of (for example, 3.5 V), almost no current flows through the secondary battery 15. Further, for example, when a power failure occurs and the charge / discharge determination circuit 2 does not output a signal, the base current does not flow in the first transistor 4, so the first transistor 4 is OFF. The second transistor 5 is also off, and the power input terminal 12
Does not supply power to the load 3. Then, the electric power is supplied from the secondary battery 15 to the load 3 via the fourth resistor 16. At this time, the power consumed by the load 3 is small and the current is minute, so that the voltage drop in the fourth resistor 16 is also very small. Further, since the first transistor 4 is off, the first transistor 4 is connected to the first resistor 17 via the fifth resistor 17.
The current flowing through the transistor 4 is very small.
【００１９】上記実施例によれば、電源入力端子１２か
ら充電電力が供給されているときには、負荷３に供給さ
れる電圧降下は第２のトランジスタ５による微小な電圧
のみなため、充電電力の電圧とほぼ等しい電圧を負荷３
に供給することができる。また、二次電池１５の充電が
行われており、二次電池１５の電圧 即ち中点２０の電
圧が充電電圧まで達していないときにも、負荷３には充
電電力の電圧とほぼ等しい電圧を供給することができ
る。According to the above-described embodiment, when the charging power is supplied from the power input terminal 12, the voltage drop supplied to the load 3 is only a minute voltage due to the second transistor 5, so that the charging power voltage is reduced. Load 3 which is almost equal to
Can be supplied to. Further, even when the secondary battery 15 is being charged and the voltage of the secondary battery 15, that is, the voltage at the midpoint 20 has not reached the charging voltage, the load 3 is supplied with a voltage substantially equal to the charging power voltage. Can be supplied.
【００２０】さらに、二次電池１５への充電と二次電池
１５から負荷３への電力の供給との切換にはスイッチン
グ回路１を使用し二次電池１５の充電のための電流制限
及び充電電圧の制限には第４の抵抗１６と第５の抵抗１
７とによって行っているため、充放電回路の構成を簡略
化することができる。また、負荷３への電力供給の切換
を充放電判別回路２からスイッチング回路１への信号の
有無によって行っているので、充放電回路を使用するシ
ステムに最適なタイミングで切換を行うことができる。Further, the switching circuit 1 is used for switching the charging of the secondary battery 15 and the supply of the electric power from the secondary battery 15 to the load 3, and the current limit and the charging voltage for charging the secondary battery 15 are used. 4th resistor 16 and 5th resistor 1
7, the structure of the charging / discharging circuit can be simplified. In addition, since the switching of the power supply to the load 3 is performed depending on the presence / absence of a signal from the charge / discharge determination circuit 2 to the switching circuit 1, the switching can be performed at the optimum timing for the system using the charge / discharge circuit.
【００２１】尚、本発明は上記実施例に限定されるもの
ではなく、各請求項に記載された発明の主旨を逸脱しな
い範囲にて各種の変形実施例が可能である。The present invention is not limited to the above embodiments, and various modified embodiments are possible without departing from the spirit of the invention described in each claim.
【００２２】[0022]
【発明の効果】本発明は以上のように構成された充電回
路であり、請求項１の発明によれば、直流電源から充電
電力が供給されているときばかりでなく、二次電池の充
電が行われており、二次電池の電圧が充電電圧まで達し
ていないときにも、負荷に供給される電圧降下は第２の
トランジスタによる微小な電圧のみなため、電源の電力
の電圧とほぼ等しい電圧を負荷に供給することができ
る。The present invention is a charging circuit configured as described above. According to the invention of claim 1, the charging of the secondary battery is performed not only when the charging power is supplied from the DC power supply. Even if the voltage of the secondary battery does not reach the charging voltage, the voltage drop supplied to the load is a minute voltage due to the second transistor, and therefore the voltage is almost equal to the power supply voltage. Can be supplied to the load.
【００２３】また、請求項２の発明によれば、二次電池
への充電が行われる電源から負荷への電力の供給と二次
電池から負荷への電力の供給との切換にはスイッチング
回路を使用し二次電池の充電のための充電電流の制限及
び充電電圧の制限は第１の充電電流及び充電電圧制限用
の抵抗と第２の充電電流及び充電電圧制限用の抵抗とに
よって行っているため、充電回路の構成を簡略化するこ
とができる。According to the second aspect of the present invention, a switching circuit is used for switching between the supply of electric power from the power source for charging the secondary battery to the load and the supply of electric power from the secondary battery to the load. The charge current limit and charge voltage limit for charging the used secondary battery are limited by the first charge current and charge voltage limit resistor and the second charge current and charge voltage limit resistor. Therefore, the configuration of the charging circuit can be simplified.
【００２４】また、負荷への電力供給の切換を判別回路
からスイッチング回路への信号の有無によって行ってい
るので、充電回路を使用するシステムに最適なタイミン
グで切換を行うことができる。Further, since the power supply to the load is switched depending on the presence / absence of a signal from the determination circuit to the switching circuit, the switching can be performed at the optimum timing for the system using the charging circuit.
【図１】本発明の充電回路の構成図である。FIG. 1 is a configuration diagram of a charging circuit of the present invention.
【図２】従来の充電回路の構成図である。FIG. 2 is a configuration diagram of a conventional charging circuit.
【図３】従来の充電回路の構成図である。FIG. 3 is a configuration diagram of a conventional charging circuit.
【図４】従来の充電回路の構成図である。FIG. 4 is a configuration diagram of a conventional charging circuit.
【図５】従来の充電回路の構成図である。FIG. 5 is a configuration diagram of a conventional charging circuit.
１ スイッチング回路
２ 判別回路
３ 負荷
４ 第１のトランジスタ
５ 第２のトランジスタ
６ 第１の抵抗
７ 第２の抵抗
８ 第３の抵抗
９ 電源線
１０ 信号線
１１ グランド線
１２ 電源入力端子
１３ 信号入力端子
１５ 二次電池
１６ 第４の抵抗（第１の充電電流及び充電電圧制限
用の抵抗）
１７ 第５の抵抗（第２の充電電流及び充電電圧制限
用の抵抗）1 Switching Circuit 2 Discrimination Circuit 3 Load 4 First Transistor 5 Second Transistor 6 First Resistor 7 Second Resistor 8 Third Resistor 9 Power Supply Line 10 Signal Line 11 Ground Line 12 Power Supply Input Terminal 13 Signal Input Terminal 15 Secondary Battery 16 Fourth Resistance (First Charging Current and Charging Voltage Limiting Resistance) 17 Fifth Resistance (Second Charging Current and Charging Voltage Limiting Resistance)
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) H02J 9/06 502 H02J 7/00 - 7/10 H02J 7/34 ─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields investigated (Int.Cl. 7 , DB name) H02J 9/06 502 H02J 7/ 00-7/10 H02J 7/34
Claims (2)
出力する判別回路と、コレクタが第１抵抗に接続され、
ベースが前記判別回路に第２抵抗を介して接続されると
共に第３抵抗を介してグランド線に接続され、エミッタ
がグランド線に接続された第１のトランジスタと、ベー
スが第１抵抗を介して第１のトランジスタのコレクタに
接続され、エミッタが電源供給線に接続され、且つコレ
クタが負荷に接続されると共に第１の充電電流及び充電
電圧制限用の第４抵抗を介して二次電池に接続される第
２のトランジスタと、第１の充電電流及び充電電圧制限
用の第４抵抗と二次電池との中点と、第１のトランジス
タのコレクタとの間に接続された第２の充電電流及び充
電電圧制限用の第５抵抗とを備えたことを特徴とする充
電回路。1. A determination circuit for determining whether to charge or discharge and outputting a signal, and a collector connected to a first resistor ,
When the base is connected to the discrimination circuit via the second resistor
A first transistor, both of which are connected to the ground line through a third resistor and whose emitter is connected to the ground line, and a base of which is connected to the collector of the first transistor through the first resistor, Is connected to the power supply line, the collector is connected to the load , and the second transistor is connected to the secondary battery via the fourth resistor for limiting the first charging current and the charging voltage; the midpoint between the charging current and a fourth resistor and a secondary battery for charging voltage limit, and a second charging current and a fifth resistor for charging voltage limit that is connected between the collector of the first transistor Charging circuit characterized by having.
に信号を出力する判別回路と、この判別回路に接続され
る信号入力端子、電源に接続される電源入力端子、前記
電源のグランドに接続されるグランド入力端子、前記信
号入力端子からの信号でＯＮ／ＯＦＦされる第１および
第２のトランジスタによって電力を供給する電源出力端
子、グランド出力端子および前記第１のトランジスタの
コレクタに接続される端子を備え前記判別回路からの信
号によってＯＮして電源出力端子から電力を供給するス
イッチング回路と、このスイッチング回路の電源出力端
子とグランド出力端子との間に接続された第１の充電電
流及び充電電圧制限用の第４抵抗と二次電池との直列回
路及び負荷と、前記直列回路の中点とスイッチング回路
の前記第１のトランジスタのコレクタに接続される端子
との間に接続された第２の充電電流及び充電電圧制限用
の第５抵抗とを備えたことをことを特徴とする充電回
路。Wherein a determination circuit for outputting to determine whether to discharge or charge signal during the charging, the signal input terminal connected to the determination circuit, a power supply input terminal connected to a power source, the
Ground input terminal connected to the power supply ground, the signal
Signals from the signal input terminal turn ON / OFF
A power supply output terminal for supplying electric power by a second transistor , a ground output terminal, and the first transistor.
A switching circuit which has a terminal connected to a collector and is turned on by a signal from the discrimination circuit to supply electric power from a power supply output terminal, and a first circuit connected between the power supply output terminal and the ground output terminal of the switching circuit. A series circuit of a fourth resistor for limiting charging current and charging voltage and a secondary battery and a load, and a terminal connected to the midpoint of the series circuit and the collector of the first transistor of the switching circuit. And a fifth resistor for limiting a charging voltage and a second charging current connected between the charging circuit and the charging circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08055894A JP3510666B2 (en) | 1994-04-19 | 1994-04-19 | Charging circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP08055894A JP3510666B2 (en) | 1994-04-19 | 1994-04-19 | Charging circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07298518A JPH07298518A (en) | 1995-11-10 |
| JP3510666B2 true JP3510666B2 (en) | 2004-03-29 |
Family
ID=13721673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP08055894A Expired - Fee Related JP3510666B2 (en) | 1994-04-19 | 1994-04-19 | Charging circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3510666B2 (en) |
-
1994
- 1994-04-19 JP JP08055894A patent/JP3510666B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07298518A (en) | 1995-11-10 |
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