JPH099518A - Charging device - Google Patents
Charging deviceInfo
- Publication number
- JPH099518A JPH099518A JP7154320A JP15432095A JPH099518A JP H099518 A JPH099518 A JP H099518A JP 7154320 A JP7154320 A JP 7154320A JP 15432095 A JP15432095 A JP 15432095A JP H099518 A JPH099518 A JP H099518A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- charging
- current
- voltage
- microcomputer
- 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はバッテリーの充電を精度
良く、無駄なく、かつ安全に行う充電装置に関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charging device for charging a battery accurately, without waste and safely.
【０００２】[0002]
【従来の技術】近年、小型のパソコンや家庭用ビデオカ
メラ等は小型化が進みバッテリーを電源とすることによ
り、どこへでも持ち運びが可能となり普及しつつある。2. Description of the Related Art In recent years, small personal computers, home video cameras and the like have become smaller and are becoming popular because they can be carried anywhere by using a battery as a power source.
【０００３】今後、ますますバッテリー駆動の電子機器
が増え、そして経済的にも省資源の面からも有利な充電
可能なバッテリーが使われるようになってきた。In the future, the number of battery-powered electronic devices will increase, and rechargeable batteries, which are economically and resource-saving, have come to be used.
【０００４】しかし、充電可能なバッテリーはその寿命
を長くするためと、十分な充電を行いそのバッテリー能
力容量を引き出すためにはバッテリーの充電に最適な充
電機能が要求される。その機能は次のようなものであ
る。However, a rechargeable battery is required to have an optimal charging function for charging the battery in order to prolong its life and in order to fully charge the battery and bring out its battery capacity. Its function is as follows.
【０００５】ａ．ロスなく安全に充電ができる。 ｂ．最適な充電状態で充電できる。A. You can safely charge without loss. b. Can be charged in the optimal charging state.
【０００６】ｃ．短時間で完全充電ができる。 以下に図２により従来の充電装置について説明する。C. Can be fully charged in a short time. A conventional charging device will be described below with reference to FIG.
【０００７】同図において、入力電源端子１，２から電
源の供給を受け充電電圧制御回路１Ｃ又は２Ｃと定電流
回路１Ａ又は２Ａと電流検出回路１Ｂ又は２Ｂとマイク
ロコンピュータ３１によりバッテリー２９又は７９を充
電する。In FIG. 1, the battery 29 or 79 is supplied by the charging voltage control circuit 1C or 2C, the constant current circuit 1A or 2A, the current detection circuit 1B or 2B, and the microcomputer 31 by receiving power from the input power terminals 1 and 2. To charge.
【０００８】充電電圧制御回路１Ｃは入力電源端子１と
トランジスタ２０のエミッタと接続し、そのトランジス
タ２０のコレクタからバッテリー２９のプラス端子２８
を介して充電する。そして、バッテリー２９の電圧を抵
抗２６と抵抗２７で分圧した電圧は基準電源２５と増幅
器２３で比較し、その出力をトランジスタ２１と抵抗２
２を介してトランジスタ２０に加えバッテリー２９への
充電電圧を制御する。The charging voltage control circuit 1C is connected to the input power supply terminal 1 and the emitter of the transistor 20, and from the collector of the transistor 20 to the plus terminal 28 of the battery 29.
To charge via. Then, the voltage obtained by dividing the voltage of the battery 29 by the resistors 26 and 27 is compared by the reference power supply 25 and the amplifier 23, and the output is compared with the transistor 21 and the resistor 2.
The charge voltage to the battery 29 in addition to the transistor 20 is controlled via 2.
【０００９】又、マイクロコンピュータ３１のポートＰ
１によりトランジスタ２４をＯＮ／ＯＦＦしトランジス
タ２１をＯＮ／ＯＦＦすることでバッテリー２９への充
電をＯＮ／ＯＦＦ制御する。即ち、充電電圧制御回路１
Ｃとマイクロコンピュータ３１でバッテリー２９への充
電電圧制御および遮断する手段を構成することになる。Also, the port P of the microcomputer 31
By turning on / off the transistor 24 and turning on / off the transistor 21 by 1, the charging of the battery 29 is controlled to be turned on / off. That is, the charging voltage control circuit 1
C and the microcomputer 31 constitute a means for controlling and shutting off the charging voltage of the battery 29.
【００１０】更に、バッテリー２９の電圧を抵抗２６と
抵抗２７で分圧した電圧はマイクロコンピュータ３１に
内蔵又は外部のＡ／Ｄコンバータ３２のポートＡＤ３に
入力し、バッテリー２９の充電状態を監視するためのも
のである。Further, the voltage obtained by dividing the voltage of the battery 29 by the resistors 26 and 27 is input to the port AD3 of the A / D converter 32 which is built in or external to the microcomputer 31 to monitor the charge state of the battery 29. belongs to.
【００１１】次に、定電流回路１Ａはバッテリー２９が
過放電により電圧が規定電圧以下の時、バッテリー２９
を劣化させないために小さい電流で予備充電し、回復さ
せたり、充電が完了した後、自己放電に対し補充電する
ものである。Next, the constant current circuit 1A operates when the voltage of the battery 29 is below a specified voltage due to over discharge.
In order to prevent deterioration, the battery is precharged with a small current to recover it, or after charging is completed, it is supplemented with self-discharge.
【００１２】定電流回路１Ａは、電流検出抵抗３４から
制御用トランジスタ３６を介してバッテリー２９を充電
する。定電流動作は電流検出抵抗３４に発生する電圧を
抵抗３３と抵抗３５で分圧し、抵抗３３の電圧でトラン
ジスタ３７をドライブし、トランジスタ３７のエミッタ
−コレクタ間の電圧で抵抗３４と制御用トランジスタ３
６のベース間電圧を一定に制御し定電流を得る。The constant current circuit 1A charges the battery 29 from the current detection resistor 34 via the control transistor 36. In the constant current operation, the voltage generated in the current detection resistor 34 is divided by the resistors 33 and 35, the transistor 37 is driven by the voltage of the resistor 33, and the resistor 34 and the control transistor 3 are controlled by the voltage between the emitter and collector of the transistor 37.
A constant current is obtained by controlling the voltage between bases of 6 to be constant.
【００１３】電流検出回路１Ｂはバッテリー２９に充電
された電流を抵抗１９で電圧に変え、その電圧を増幅器
１６と帰還抵抗１７，１８で増幅しマイクロコンピュー
タ３１に内蔵又は外部のＡ／Ｄコンバータ３２のポート
ＡＤ１に入力し計測する。即ち、電流検出回路１Ｂはバ
ッテリー２９への充電電流を検知する手段となる。The current detection circuit 1B converts the current charged in the battery 29 into a voltage by the resistor 19 and amplifies the voltage by the amplifier 16 and the feedback resistors 17 and 18, and the A / D converter 32 built in or external to the microcomputer 31. Input to port AD1 of and measure. That is, the current detection circuit 1B serves as means for detecting the charging current to the battery 29.
【００１４】バッテリー７９側の充電電圧制御回路２Ｃ
と定電流回路２Ａと電流検出回路２Ｂからなる充電回路
も上記と同一動作である。Charging voltage control circuit 2C on the battery 79 side
The charging circuit including the constant current circuit 2A and the current detection circuit 2B also operates in the same manner as above.
【００１５】以上のように構成された充電装置につい
て、以下その動作について詳しく説明する。The operation of the charging device configured as described above will be described in detail below.
【００１６】図２において、入力電源端子１，２から電
源の供給を受けトランジスタ２０に流れる電流をＯＮ／
ＯＦＦし、バッテリー２９のプラス端子２８を介して充
電する。トランジスタ２０のＯＮ／ＯＦＦ制御はマイク
ロコンピュータ３１のポートＰ１出力のハイ／ローによ
りトランジスタ２４をＯＮ／ＯＦＦし行う。そして、バ
ッテリー２９への充電はバッテリー２９の電圧状態によ
って制御する。In FIG. 2, power is supplied from the input power terminals 1 and 2, and the current flowing through the transistor 20 is turned on / off.
It is turned off, and the battery 29 is charged via the positive terminal 28. The ON / OFF control of the transistor 20 is performed by turning on / off the transistor 24 by the high / low output of the port P1 of the microcomputer 31. The charging of the battery 29 is controlled according to the voltage state of the battery 29.
【００１７】まずバッテリー２９の電圧は抵抗２６と抵
抗２７で分圧しマイクロコンピュータ３１に内蔵又は外
部のＡ／Ｄコンバータ３２のポートＡＤ３に入力し、バ
ッテリー２９の充電電圧を監視する。First, the voltage of the battery 29 is divided by the resistors 26 and 27 and input to the port AD3 of the A / D converter 32 built in or external to the microcomputer 31 to monitor the charging voltage of the battery 29.
【００１８】ここで、バッテリー２９の電圧が規定電圧
以上の場合はトランジスタ２０を介してバッテリー容量
に相当する電流（約１〜２Ａ：入力電源で制限する）で
充電を行う。そして充電が進むとバッテリー２９の電圧
が充電電圧制御回路１Ｃで決まる電圧：Ｖ１で制限され
充電電流が減少する。基準電源２５の電圧をＶCとする
と Ｖ１＝（Ｒ26＋Ｒ27）／Ｒ27×ＶC〈Ｒ26，Ｒ27は抵抗
２６、抵抗２７の抵抗値〉 充電電流の減少は電流検出回路１Ｃの出力をマイクロコ
ンピュータ３１に内蔵又は外部のＡ／Ｄコンバータ３２
のポートＡＤ１に入力し計測する。そしてマイクロコン
ピュータ３１は規定の充電電流（約０．１Ａ）以下にな
った時、バッテリー２９が満充電になったと判断し、ポ
ートＰ１をハイにしてトランジスタ２４をＯＮさせトラ
ンジスタ２１，２０をＯＦＦし充電を完了する。Here, when the voltage of the battery 29 is equal to or higher than the specified voltage, charging is performed through the transistor 20 with a current corresponding to the battery capacity (about 1 to 2 A: limited by the input power source). Then, as the charging proceeds, the voltage of the battery 29 is limited by the voltage V1 determined by the charging voltage control circuit 1C and the charging current decreases. When the voltage of the reference power supply 25 is V C , V1 = (R 26 + R 27 ) / R 27 × V C <R 26 and R 27 are resistance values of the resistors 26 and 27> The decrease of the charging current is caused by the current detection circuit 1C. A / D converter 32 whose output is built in or external to the microcomputer 31
Input to port AD1 of and measure. Then, the microcomputer 31 determines that the battery 29 is fully charged when the charging current is less than the specified charging current (about 0.1 A), sets the port P1 to high, turns on the transistor 24, and turns off the transistors 21 and 20. Complete charging.
【００１９】又、バッテリー２９が過放電等により電圧
が規定電圧以下の時、マイクロコンピュータ３１のポー
トＰ２をローにして定電流回路１Ａを動作させバッテリ
ー２９を劣化させないように小さい電流（約０．１〜
０．２Ａ固定）で予備充電し、回復させる。When the voltage of the battery 29 is below the specified voltage due to over-discharging or the like, the port P2 of the microcomputer 31 is set to low to operate the constant current circuit 1A and a small current (about 0. 1 to
Pre-charge with 0.2A fixed) to recover.
【００２０】又、充電が完了した後は、自己放電に対し
補充電を行うために時間を決めて定電流回路１Ａを動作
させるものである。After the charging is completed, the constant current circuit 1A is operated at a predetermined time for supplementary charging for self-discharge.
【００２１】定電流：ｉ１は、以下の式で決まる。 （ｉ１×Ｒ34）／（Ｒ33＋Ｒ35）×Ｒ33＝０．７Ｖ〈ト
ランジスタ３７のＶbe〉 ｉ１＝０．７×（Ｒ33＋Ｒ35）／（Ｒ34×Ｒ33）
〈Ｒ33，Ｒ34，Ｒ35は抵抗３３，３４，３５の抵抗値〉Constant current: i1 is determined by the following equation. (I1 × R 34 ) / (R 33 + R 35 ) × R 33 = 0.7V <Vbe of transistor 37> i1 = 0.7 × (R 33 + R 35 ) / (R 34 × R 33 ).
<R 33 , R 34 , R 35 are resistance values of the resistors 33 , 34 , 35 >
【００２２】[0022]
【発明が解決しようとする課題】しかしながら上記の従
来の構成では、上記定電流回路１Ａでバッテリー２９が
０Ｖに近い時、入力電源端子１の電圧が１５Ｖとすると
トランジスタ３６の電力ロスは、約０．１Ａ×１５Ｖ＝
１．５Ｗとなり、大きく放熱板も必要となる。However, in the above-mentioned conventional configuration, when the voltage of the input power supply terminal 1 is 15V when the battery 29 is close to 0V in the constant current circuit 1A, the power loss of the transistor 36 is about 0V. .1A × 15V =
It becomes 1.5 W, and a large heat sink is also required.
【００２３】又、過放電時のバッテリー電圧状態によっ
て定電流回路１Ａの電流値を変えたり、補充電時の電流
を変えることができない点や、更に、一方のバッテリー
が満充電に近付き入力電源の電流に余裕が出た時、それ
に応じて他方のバッテリーに必要な充電電流を流すこと
ができないという問題点を有していた。Further, the current value of the constant current circuit 1A cannot be changed depending on the battery voltage state at the time of over-discharging, and the current at the time of supplementary charging cannot be changed. Furthermore, one battery approaches full charge and the input power source There was a problem in that when the current became available, the charging current required for the other battery could not be supplied accordingly.
【００２４】本発明は上記従来の問題点を解決するもの
で、安いコストでしかも精度良くかつ簡単にバッテリー
の充電電流を制御可能とする充電装置を提供することを
目的とする。The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a charging device that can control the charging current of a battery at low cost, with high accuracy and easily.
【００２５】[0025]
【課題を解決するための手段】この目的を達成するため
に本発明の充電装置は、２個以上のバッテリーを充電す
る装置において、バッテリーへの充電電圧を制御又は遮
断する手段と、バッテリーへの充電電流を検知する手段
と、各バッテリーへの充電電流を切替える手段と、上記
検知した充電電流で、ＤＣ−ＤＣコンバータの出力を制
御する手段とで構成するものである。In order to achieve this object, the charging device of the present invention is a device for charging two or more batteries, and a device for controlling or interrupting the charging voltage to the batteries and a battery charging device. It comprises a means for detecting the charging current, a means for switching the charging current to each battery, and a means for controlling the output of the DC-DC converter by the detected charging current.
【００２６】[0026]
【作用】本発明は上記の構成によって、安いコストでし
かも精度良くかつ簡単にバッテリーへの充電電流を制御
する充電装置を提供することができる。With the above-described structure, the present invention can provide a charging device that controls the charging current to the battery at low cost, with high accuracy and easily.
【００２７】[0027]
【実施例】以下本発明の充電装置の一実施例について図
１により説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the charging device of the present invention will be described below with reference to FIG.
【００２８】なお、従来技術と同一部分は同一番号を使
用し説明を省略して説明すると、同図において、基本的
には図２の従来技術のものと、電流検出回路１Ｂ，２Ｂ
と充電電圧制御回路１Ｃ，２Ｃは同じで、定電流回路１
Ａ，２Ａを無くしたものであり、ここでは特徴とするＤ
Ｃ−ＤＣコンバータ回路と電流制御回路の動作について
説明する。The same parts as those in the prior art are designated by the same reference numerals, and the description thereof will be omitted. In the figure, basically, the same parts as those in the prior art of FIG.
The charging voltage control circuits 1C and 2C are the same, and the constant current circuit 1
A and 2A have been eliminated, and here is the characteristic D
The operations of the C-DC converter circuit and the current control circuit will be described.
【００２９】同図において、ＤＣ−ＤＣコンバータ回路
はＤＣ−ＤＣコンバータ制御回路９とＦＥＴ１０とダイ
オード１１とコイル１２とコンデンサ１３から成り、電
圧降下型である。ＤＣ−ＤＣコンバータ制御回路９はＦ
ＥＴ１０のＯＮ／ＯＦＦのパルス幅を制御する増幅器８
を持ち出力電流を制御する。又、ＤＣ−ＤＣコンバータ
制御回路９には基準電源Ｖｓｔ（例えば電圧：２．５
Ｖ）を持ち、入力電源端子２（アース）間に抵抗ブリッ
ジ：抵抗６、抵抗７、抵抗４、抵抗５とスイッチ３を介
して電流検出抵抗１９及び６９を構成し、抵抗ブリッジ
に増幅器８の入力を接続する。In the figure, the DC-DC converter circuit comprises a DC-DC converter control circuit 9, an FET 10, a diode 11, a coil 12 and a capacitor 13, and is of a voltage drop type. The DC-DC converter control circuit 9 is F
Amplifier 8 for controlling ON / OFF pulse width of ET10
Control the output current. Further, the DC-DC converter control circuit 9 has a reference power source Vst (for example, voltage: 2.5).
V), and a resistor bridge: a resistor 6, a resistor 7, a resistor 4, a resistor 5 and a switch 3 between the input power supply terminal 2 (ground) to form current detection resistors 19 and 69, and the amplifier 8 is connected to the resistor bridge. Connect the inputs.
【００３０】更に、抵抗ブリッジの抵抗６，７の交点
に、マイクロコンピュータ３１のポートＰＷＭから出力
したい電流に対応するパルス幅制御された信号を出しそ
の信号を抵抗３５とコンデンサ３８で平滑し抵抗３４を
介して接続する。Further, a pulse-width-controlled signal corresponding to the current desired to be output from the port PWM of the microcomputer 31 is output at the intersection of the resistors 6 and 7 of the resistor bridge, and the signal is smoothed by the resistor 35 and the capacitor 38 to produce the resistor 34. Connect through.
【００３１】ＤＣ−ＤＣコンバータ回路の出力は切替え
スイッチ手段となる切替スイッチ用のトランジスタ１４
とトランジスタ１５を通してバッテリー２９かバッテリ
ー７９に充電される。The output of the DC-DC converter circuit is a switching switch transistor 14 serving as a switching switch means.
The battery 29 or the battery 79 is charged through the transistor 15.
【００３２】次に、ＤＣ−ＤＣコンバータ回路とＤＣ−
ＤＣコンバータの出力制御手段となるマイクロコンピュ
ータ３１によるバッテリー２９への充電電流の制御につ
いて説明する。Next, the DC-DC converter circuit and the DC-
The control of the charging current to the battery 29 by the microcomputer 31 serving as the output control means of the DC converter will be described.
【００３３】トランジスタ１４からバッテリー２９への
充電電流をｉ19、電流検出抵抗１９の抵抗値をＲ19、抵
抗６と抵抗７の交点電圧をＶ+、抵抗４と抵抗５の交点
電圧をＶ-、マイクロコンピュータ３１のポートＰＷＭ
から出力したい電流に対応するパルス幅制御された信号
を抵抗３５とコンデンサ３８で平滑し抵抗３４を介して
抵抗７に流れる電流をｉp、抵抗４と抵抗５と抵抗６と
抵抗７の各抵抗値をＲとすると（スイッチ３はａ側、又
電流検出抵抗１９に流れる抵抗２６，２７からの電流は
バッテリー２９への充電電流に比べ小さいので無視す
る）、 Ｖ+＝Ｖｓｔ×１／２＋Ｒ×ｉp Ｖ-＝（Ｖｓｔ−ｉ19×Ｒ19）×１／２＋ｉ19×Ｒ9 Ｖ-＝Ｖｓｔ×１／２＋ｉ19×Ｒ9×１／２ ここで、ＤＣ−ＤＣコンバータ回路とトランジスタ１４
からバッテリー２９への充電電流ｉ9を検知する回路は
閉ループとなっているので、 Ｖ+＝Ｖ- が成り立つ。よって Ｖｓｔ×１／２＋Ｒ×ｉp＝Ｖｓｔ×１／２＋ｉ19×Ｒ
19×１／２ Ｒ×ｉp＝ｉ19×Ｒ19×１／２ ｉ19＝２Ｒ／Ｒ19×ｉp 又、電流ｉpはマイクロコンピュータ３１のポートＰＷ
Ｍのパルス幅に比例するので、バッテリー２９への充電
電流ｉ19はマイクロコンピュータ３１のポートＰＷＭの
パルス幅で自由に制御可能である。かつ電流検出回路１
Ｂの増幅器１６の出力をＡ／Ｄコンバータ３２のポート
ＡＤ１で測定し、その値によりマイクロコンピュータ３
１のポートＰＷＭのパルスを変え充電電流を補正するこ
とも可能である。The charging current from the transistor 14 to the battery 29 is i 19 , the resistance value of the current detecting resistor 19 is R 19 , the crossing point voltage between the resistors 6 and 7 is V + , and the crossing point voltage between the resistors 4 and 5 is V −. , Port PWM of the microcomputer 31
Pulse width controlled signal corresponding to the current to be output from the resistor 35 and the capacitor 38 are smoothed, and the current flowing through the resistor 34 to the resistor 7 is i p , and the resistors 4, 5 and 6 and 7 are the respective resistors. If the value is R (the switch 3 is on the a side, and the currents from the resistors 26 and 27 flowing through the current detection resistor 19 are smaller than the charging current to the battery 29, they are ignored), and V + = Vst × 1/2 + R × i p V − = (Vst−i 19 × R 19 ) × 1/2 + i 19 × R 9 V − = Vst × 1/2 + i 19 × R 9 × 1/2 Here, the DC-DC converter circuit and the transistor 14
Since the circuit for detecting the charging current i 9 from the battery 29 to the battery 29 is a closed loop, V + = V − is established. Therefore Vst × 1/2 + R × i p = Vst × 1/2 + i 19 × R
19 × 1/2 R × i p = i 19 × R 19 × 1/2 i 19 = 2R / R 19 × i p The current i p port PW of the microcomputer 31
Since it is proportional to the pulse width of M, the charging current i 19 to the battery 29 can be freely controlled by the pulse width of the port PWM of the microcomputer 31. And current detection circuit 1
The output of the B amplifier 16 is measured at the port AD1 of the A / D converter 32, and the measured value is used to determine whether the microcomputer 3
It is also possible to correct the charging current by changing the pulse of the port 1 PWM.
【００３４】よって、バッテリー２９の電圧が０Ｖに近
い時でもＤＣ−ＤＣコンバータ回路でＦＥＴ１０のＯＮ
期間を短くするように、マイクロコンピュータ３１のＰ
ＷＭパルスを制御することにより規定の微少な予備充電
電流を電力ロス無く充電可能である。かつ電流検出回路
１Ｂの増幅器１６の出力をＡ／Ｄコンバータ３２のポー
トＡＤ１で測定しその値によりマイクロコンピュータ３
１のポートＰＷＭのパルスを変え充電電流を補正するこ
とも可能である。Therefore, even when the voltage of the battery 29 is close to 0V, the FET 10 is turned on by the DC-DC converter circuit.
In order to shorten the period, P of the microcomputer 31
By controlling the WM pulse, it is possible to charge a prescribed minute preliminary charging current without power loss. Moreover, the output of the amplifier 16 of the current detection circuit 1B is measured at the port AD1 of the A / D converter 32, and the value is measured by the microcomputer 3
It is also possible to correct the charging current by changing the pulse of the port 1 PWM.
【００３５】そして、過放電時のバッテリー電圧が大き
く低下していない場合は多めの予備充電電流を流し速く
充電を完了することが可能となる。When the battery voltage at the time of over-discharging has not dropped significantly, a large amount of preliminary charging current can be supplied to quickly complete the charging.
【００３６】又、バッテリー２９が満充電に近付き充電
電流が減り、入力電源の電流に余裕が出た時、電流検出
回路１Ｂの増幅器１６の出力をＡ／Ｄコンバータ３２の
ポートＡＤ１でバッテリー２９の充電電流ｉ19を測定
し、予め入力電源の最大電流ｉ mをマイクロコンピュー
タ３１に入力しておけば“ｉm−ｉ19”の電流をバッテ
リー７９の充電に振り向けることができる。そのために
スイッチ３をｂ側にし、トランジスタ７０をＯＦＦしト
ランジスタ１５をＯＮするようにポートＰ４，Ｐ３をハ
イ、ローを設定し、そしてマイクロコンピュータ３１の
ポートＰＷＭから“ｉm−ｉ19”の電流に相当するパル
スを出力することにより逐次、バッテリー２９の充電電
流ｉ19が低下する状態を検出し、バッテリー７９に充電
電流を増やして流すことが可能となる。In addition, the battery 29 approaches full charge and is charged.
Current detection when the current decreases and there is a margin in the current of the input power supply
The output of the amplifier 16 of the circuit 1B is supplied to the A / D converter 32.
Charging current i of battery 29 at port AD119Measure
The maximum current i of the input power source mMicro computer
If you enter it inm−i19The current of
This can be used for charging the Lee 79. for that reason
Set switch 3 to b and turn off transistor 70.
Ports P4 and P3 are turned on to turn on transistor 15.
A, low, and the microcomputer 31
From port PWM to "im−i19Corresponding to the current of
The battery 29 is sequentially charged by outputting
Flow i19Detects that the battery is low and charges the battery 79
It becomes possible to increase the current and to flow.
【００３７】[0037]
【発明の効果】以上のように本発明によれば、上記した
構成によってＤＣ−ＤＣコンバータ回路でバッテリー電
圧が０Ｖに近い時でも、マイクロコンピュータのＰＷＭ
パルスで規定の微少な予備充電電流を電力ロス無く充電
可能である。As described above, according to the present invention, with the above-described structure, the PWM of the microcomputer is controlled even when the battery voltage is close to 0V in the DC-DC converter circuit.
It is possible to charge the specified minute pre-charge current by pulse without power loss.
【００３８】そして、過放電時のバッテリー電圧が大き
く低下していない場合は多めの予備充電電流を流し速く
充電を完了することが可能となる。When the battery voltage at the time of over-discharging does not drop significantly, a large amount of preliminary charging current can be supplied to quickly complete the charging.
【００３９】又、一方のバッテリーが満充電に近付き充
電電流が減り、入力電源の電流に余裕が出た時、それに
応じて他方のバッテリーに充電電流を流すことが可能で
あり、安いコストでしかも精度良くかつ簡単にバッテリ
ーの充電電流を制御可能とする優れた充電装置を実現す
るものである。Also, when one battery approaches full charge and the charging current decreases and there is a margin in the current of the input power source, the charging current can be made to flow to the other battery accordingly, and at a low cost. The object is to realize an excellent charging device capable of accurately and easily controlling the charging current of a battery.
【図１】本発明の第一の実施例における充電装置の回路
図FIG. 1 is a circuit diagram of a charging device according to a first embodiment of the present invention.
【図２】従来の充電装置の回路図FIG. 2 is a circuit diagram of a conventional charging device.
１，２ 入力電源端子 ３ スイッチ ４，５，６，７，１７，１８，２２，２６，２７，６
７，６８ 抵抗 ８，１６，２３，６６，７３ 増幅器 ９ ＤＣ−ＤＣコンバータ制御回路 １０ ＦＥＴ １１ ダイオード １２ コイル １３，３８ コンデンサ １４，１５，２０，２１，２４，３７，７０，７１，７
４，８７ トランジスタ １９，６９，３４，８４ 電流検出抵抗 ２５，７５ 基準電源 ２８，７８ プラス端子 ２９，７９ バッテリー ３０，８０ マイナス端子 ３１ マイクロコンピュータ ３２ Ａ／Ｄコンバータ ３３，３５，８３，８５ 抵抗 ３６，８６ 制御用トランジスタ ７２，７６，７７ 抵抗1, 2 input power supply terminal 3 switch 4, 5, 6, 7, 17, 18, 22, 26, 27, 6
7,68 Resistance 8,16,23,66,73 Amplifier 9 DC-DC converter control circuit 10 FET 11 Diode 12 Coil 13,38 Capacitor 14,15,20,21,24,37,70,71,7
4,87 Transistor 19,69,34,84 Current detection resistance 25,75 Reference power supply 28,78 Positive terminal 29,79 Battery 30,80 Minus terminal 31 Microcomputer 32 A / D converter 33,35,83,85 Resistance 36 , 86 Control transistor 72,76,77 Resistor
Claims (1)
おいて、バッテリーへの充電電圧を制御又は遮断する手
段と、バッテリーへの充電電流を検知する手段と、各バ
ッテリーへの充電電流を切替える手段と、上記検知され
た充電電流によりＤＣ−ＤＣコンバータの出力を制御す
る手段とで構成される充電装置。1. In an apparatus for charging two or more batteries, means for controlling or interrupting the charging voltage to the batteries, means for detecting the charging current to the batteries, and means for switching the charging current to each battery. , A means for controlling the output of the DC-DC converter by the detected charging current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15432095A JP3239689B2 (en) | 1995-06-21 | 1995-06-21 | Charging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15432095A JP3239689B2 (en) | 1995-06-21 | 1995-06-21 | Charging device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH099518A true JPH099518A (en) | 1997-01-10 |
| JP3239689B2 JP3239689B2 (en) | 2001-12-17 |
Family
ID=15581563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15432095A Expired - Fee Related JP3239689B2 (en) | 1995-06-21 | 1995-06-21 | Charging device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3239689B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000134804A (en) * | 1998-10-27 | 2000-05-12 | Nec Corp | Charge/discharge switching circuit |
| JP2007259615A (en) * | 2006-03-24 | 2007-10-04 | Power System:Kk | Charger or discharger for capacitor storage power supply |
| JP2008125280A (en) * | 2006-11-14 | 2008-05-29 | Seiko Epson Corp | Charger, information processing terminal, and information processing system |
| EP1978621A1 (en) * | 2007-04-05 | 2008-10-08 | Ferm B.V. | Universal charging device and method of charging a battery |
| JP2014007908A (en) * | 2012-06-26 | 2014-01-16 | Jfe Engineering Corp | Rapid charging method and apparatus |
-
1995
- 1995-06-21 JP JP15432095A patent/JP3239689B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000134804A (en) * | 1998-10-27 | 2000-05-12 | Nec Corp | Charge/discharge switching circuit |
| JP2007259615A (en) * | 2006-03-24 | 2007-10-04 | Power System:Kk | Charger or discharger for capacitor storage power supply |
| JP2008125280A (en) * | 2006-11-14 | 2008-05-29 | Seiko Epson Corp | Charger, information processing terminal, and information processing system |
| EP1978621A1 (en) * | 2007-04-05 | 2008-10-08 | Ferm B.V. | Universal charging device and method of charging a battery |
| JP2014007908A (en) * | 2012-06-26 | 2014-01-16 | Jfe Engineering Corp | Rapid charging method and apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3239689B2 (en) | 2001-12-17 |
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