JP3451768B2 - Rechargeable battery charge current bypass circuit - Google Patents
Rechargeable battery charge current bypass circuitInfo
- Publication number
- JP3451768B2 JP3451768B2 JP33824794A JP33824794A JP3451768B2 JP 3451768 B2 JP3451768 B2 JP 3451768B2 JP 33824794 A JP33824794 A JP 33824794A JP 33824794 A JP33824794 A JP 33824794A JP 3451768 B2 JP3451768 B2 JP 3451768B2
- Authority
- JP
- Japan
- Prior art keywords
- bypass
- secondary battery
- voltage
- transistor
- comparator
- 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)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、２次電池の充電電流
をバイパスすることによって２次電池の充電量を制御す
る２次電池の充電電流バイパス回路に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rechargeable battery charge current bypass circuit for controlling the charge amount of a rechargeable battery by bypassing the rechargeable battery charge current.
【０００２】[0002]
【従来の技術】従来の充電電流バイパス回路としては、
例えば図４に示すような回路がある。これは、単電池２
１に充電電流をバイパスするためのトランジスタ２２、
抵抗２３を並列に接続して、コンパレータ２４が単電池
２１の端子電圧をツェナダイオード２６、抵抗２５で発
生した基準電圧Ｖ０と比較し、その比較差によってトラ
ンジスタ２２を制御し充電電流のバイパス量を制御する
ものである。2. Description of the Related Art As a conventional charging current bypass circuit,
For example, there is a circuit as shown in FIG. This is a single battery 2
A transistor 22 for bypassing the charging current to 1,
The resistor 23 is connected in parallel, the comparator 24 compares the terminal voltage of the unit cell 21 with the reference voltage V0 generated by the zener diode 26 and the resistor 25, and the transistor 22 is controlled by the comparison difference to control the bypass amount of the charging current. To control.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、このよ
うな従来の充電電流バイパス回路にあっては、バイパス
発生量は基準電圧Ｖ０の発生精度、コンパレータ２４の
比較精度に基づくため、それらが故障した場合、所望の
充電電流が単電池２１に流れなくなる。とくにバイパス
電流が流れるトランジスタ２２が短絡状態に故障した場
合や、コンパレータ２４らが高めに端子電圧を比較する
状態に故障した場合や、トランジスタ２２がバイパス量
を多めに制御する状態に故障した場合などに、単電池２
１の端子電圧が本来制御されるべき範囲を越えて低い電
圧まで放電されてしまい、単電池が過放電となり、劣化
してしまうという問題点があった。そこで、この発明は
上記のような問題点に鑑み、充電電流を過度にバイパス
されることを防止し、端子電圧が所定値以下まで放電さ
れることを防げる充電電流バイパス回路を提供すること
を目的とする。However, in such a conventional charging current bypass circuit, since the bypass generation amount is based on the generation accuracy of the reference voltage V0 and the comparison accuracy of the comparator 24, when they fail. Therefore, the desired charging current does not flow to the unit cell 21. In particular, when the transistor 22 in which the bypass current flows fails in a short circuit state, when the comparators 24 fail to compare the terminal voltages with a higher level, or when the transistor 22 fails to control a large amount of bypass. A single cell 2
There is a problem that the terminal voltage of 1 is discharged to a low voltage beyond the range that should be controlled, and the unit cell is over-discharged and deteriorated. In view of the above problems, it is an object of the present invention to provide a charging current bypass circuit that prevents the charging current from being excessively bypassed and prevents the terminal voltage from being discharged below a predetermined value. And
【０００４】[0004]
【課題を解決するための手段】このため本発明は、２次
電池の端子電圧を検出する電圧検出手段と、該２次電池
の両端に接続され充電時に前記２次電池への充電電流の
一部または全部をバイパスするように作動するバイパス
手段と、前記電圧検出手段の検出値に基づき前記２次電
池の端子電圧が所定の範囲内になるように前記バイパス
手段を作動させて前記充電電流のバイパス量を制御する
バイパス量制御手段とを備える２次電池の充電電流バイ
パス回路において、上記２次電池の端子電圧が所定値よ
り低いときに、前記バイパス手段の作動または前記バイ
パス量制御手段による前記バイパス手段の制御作動を不
能とし、上記バイパス電流の発生を防止する過放電防止
手段を設けたものとした。Therefore, according to the present invention, the voltage detecting means for detecting the terminal voltage of the secondary battery and one of the charging currents connected to both ends of the secondary battery for charging the secondary battery are described. A bypass unit that operates so as to bypass a part or all of the charging unit; and a bypass unit that operates so that the terminal voltage of the secondary battery falls within a predetermined range based on the detection value of the voltage detection unit . In a charging current bypass circuit for a secondary battery, comprising: a bypass amount control means for controlling a bypass amount, when the terminal voltage of the secondary battery is lower than a predetermined value , the operation of the bypass means or the bypass amount control means Inability to control the bypass means
In addition, an over-discharge preventing means for preventing the generation of the bypass current is provided.
【０００５】[0005]
【作用】この発明では、電圧検出手段は２次電池の端子
電圧を検出し、バイパス量制御手段は端子電圧の検出値
に基づきバイパス手段を作動させて充電電流をバイパス
させ、端子電圧が所定範囲内になるように制御する。そ
の際過放電防止手段は、端子電圧に応じて所定値以上の
場合は上記制御を行なわせ、以下の場合は前記バイパス
手段の作動またはバイパス量制御手段によるバイパス手
段の制御作動を不能としてバイパス電流の発生を防止す
るようにしたから、バイパス手段の作動により２次電池
が所定値以下まで過放電されることがなく、２次電池を
劣化させずに充電電流をバイパスすることができるAccording to the present invention, the voltage detection means detects the terminal voltage of the secondary battery, the bypass amount control means operates the bypass means based on the detected value of the terminal voltage to bypass the charging current, and the terminal voltage is within a predetermined range. Control to be inside. At this time, the over-discharge prevention means causes the above control to be performed when the voltage exceeds a predetermined value according to the terminal voltage, and in the following cases , the operation of the bypass means or the bypass operation by the bypass amount control means
It is so arranged to prevent the occurrence of the bypass current as a disable control operation stage, by the operation of the bypass means without secondary battery is overdischarged to a predetermined value or less, the charging current without deteriorating the secondary battery Can be bypassed
【０００６】[0006]
【実施例】図１は本発明の第１の実施例を示す回路図で
ある。ツェナーダイオード６と抵抗５は基準電圧Ｖ１を
発生するものであり、入力保護抵抗９を介してコンパレ
ータ４の反転入力端子に基準電圧Ｖ１を入力する。可変
抵抗７は２次電池としての単電池１の端子電圧を分圧す
る抵抗であり、入力保護抵抗８を介してコンパレータ４
の非反転入力端子に入力し電池の端子電圧と基準電圧Ｖ
１との間の電位差を検出する回路を構成する。ベースが
コンパレータ４の出力端子に接続されるＮＰＮ形トラン
ジスタ２はベース、エミッター間に印加される電圧に応
じて抵抗３を流れる電流を制御する。コンパレータ４は
正電源端子が単電池１の正極に、負電源端子が抵抗１０
を介して単電池１の負極に接続される。ツェナダイオー
ド１２と抵抗１３は基準電圧Ｖ２を発生し、抵抗１０、
１１により分圧してコンパレータ４の負電源端子に印加
する。なお、以下では適宜、単電池１を２次電池とも呼
ぶ。 1 is a circuit diagram showing a first embodiment of the present invention. The Zener diode 6 and the resistor 5 generate the reference voltage V1, and the reference voltage V1 is input to the inverting input terminal of the comparator 4 via the input protection resistor 9. The variable resistor 7 is a resistor that divides the terminal voltage of the unit cell 1 serving as a secondary battery , and the comparator 4 is connected via the input protection resistor 8.
Input to the non-inverting input terminal of the battery and the terminal voltage of the battery and the reference voltage V
A circuit that detects a potential difference between the first and second terminals is configured. The NPN transistor 2 whose base is connected to the output terminal of the comparator 4 controls the current flowing through the resistor 3 according to the voltage applied between the base and the emitter. The positive power supply terminal of the comparator 4 is the positive electrode of the unit cell 1, and the negative power supply terminal is the resistor 10
Is connected to the negative electrode of the unit cell 1 via. Zener diode 12 and resistor 13 generate reference voltage V2, and resistor 10,
The voltage is divided by 11 and applied to the negative power supply terminal of the comparator 4. In the following, the unit cell 1 will be appropriately referred to as a secondary battery.
Bu
【０００７】２次電池１を充電するときに、充電時間の
経過にしたがい端子電圧は上昇していく。２次電池の端
子電圧が低い間では、コンパレータ４に供給される電圧
も低いので、コンパレータ４は作動せず、高電位のオン
信号を出力できないため、トランジスタ２が遮断状態と
なり、バイパス電流は流れない。単電池１の端子電圧が
一定の電圧に達すると、コンパレータ４は作動可能にな
る。このコンパレータ４の作動電圧から基準電圧Ｖ２と
抵抗１０、１１の分圧比によって単電池１にバイパス電
流発生可能な端子電圧が決定される。なおこの端子電圧
は基準電圧Ｖ１より低い。この後端子電圧はさらに上昇
し基準電圧Ｖ１に達するまでにはＮＰＮトランジスタ２
が遮断状態で抵抗３には充電電流は流れない。端子電圧
が基準電圧Ｖ１より大きくなるとコンパレータ４の出力
は正となり、ＮＰＮ形トランジスタ２が導通し抵抗３に
は充電電流の一部がバイパスされ流れる。この場合端子
電圧が大きければベース、エミッター間に印加される電
圧も大きいので、抵抗３を流れる電流も大きい。これに
より最終的に単電池１の端子電圧が一定の範囲内に保た
れる。When the secondary battery 1 is charged, the terminal voltage rises as the charging time elapses. While the terminal voltage of the secondary battery is low, the voltage supplied to the comparator 4 is also low, so the comparator 4 does not operate and cannot output a high-potential ON signal. Therefore, the transistor 2 is cut off and the bypass current flows. Absent. When the terminal voltage of the unit cell 1 reaches a certain voltage, the comparator 4 becomes operable. From the operating voltage of the comparator 4, the terminal voltage at which the bypass current can be generated in the unit cell 1 is determined by the reference voltage V2 and the voltage division ratio of the resistors 10 and 11. The terminal voltage is lower than the reference voltage V1. After this, the terminal voltage further rises and the NPN transistor 2 is reached before reaching the reference voltage V1.
In the cutoff state, no charging current flows through the resistor 3. When the terminal voltage becomes higher than the reference voltage V1, the output of the comparator 4 becomes positive, the NPN transistor 2 becomes conductive, and a part of the charging current is bypassed to the resistor 3. In this case, if the terminal voltage is large, the voltage applied between the base and the emitter is also large, so that the current flowing through the resistor 3 is also large. As a result, the terminal voltage of the unit cell 1 is finally kept within a certain range.
【０００８】この実施例は、以上のように構成され、２
次電池の端子電圧の検知を行なうコンパレータ４は２次
電池１から電源供給を受け、供給電圧はコンパレータ４
の作動電圧に合わせて負電源端子の電圧を上げて決定す
るようにしたから、可変抵抗７の分圧比の変動により正
端子に印加される電圧が上昇したり、ツェナダイオード
６の短絡故障を生じたりするとき端子電圧の下降により
コンパレータ４が作動できなくなる。この結果バイパス
電流の発生は限定された高端子電圧域内で行なわれ、バ
イパス電流の発生により単電池１を過放電することが防
止される。This embodiment is constructed as described above, and 2
The comparator 4 that detects the terminal voltage of the secondary battery receives power from the secondary battery 1, and the supply voltage is the comparator 4.
Since the voltage of the negative power supply terminal is raised in accordance with the operating voltage of the variable voltage, the voltage applied to the positive terminal rises due to the fluctuation of the voltage dividing ratio of the variable resistor 7, and the short circuit failure of the Zener diode 6 occurs. In this case, the comparator 4 cannot operate because the terminal voltage drops. As a result, the bypass current is generated within the limited high terminal voltage range, and the overcurrent of the unit cell 1 due to the generation of the bypass current is prevented.
【０００９】図２は本発明の第２の実施例を示す回路図
である。第１の実施例は、コンパレータ４の作動電圧を
利用しその負電源端子の電圧を持ち上げることによって
端子電圧が所定値以上のみでバイパス電流の発生を可能
としたが、本実施例では、図１に示した第１の実施例の
抵抗１０、１１、１３およびツェナダイオード１２の代
わりに抵抗１６、ツェナダイオード１５およびＰＮＰ形
トランジスタ１４を用い、コンパレータ４の正電源端子
を遮断できるように設けたものである。そのほかの構成
は第１の実施例と同様である。FIG. 2 is a circuit diagram showing a second embodiment of the present invention. In the first embodiment, by using the operating voltage of the comparator 4 and raising the voltage of its negative power supply terminal, the bypass current can be generated only when the terminal voltage is a predetermined value or more. A resistor 16, a Zener diode 15 and a PNP transistor 14 are used instead of the resistors 10, 11, 13 and the Zener diode 12 of the first embodiment shown in FIG. Is. Other configurations are similar to those of the first embodiment.
【００１０】ツェナーダイオード１５と抵抗１６は基準
電圧Ｖ３を発生するとともにＰＮＰ形トランジスタ１６
のベースに印加する。ＰＮＰトランジスタ１４のエミッ
ターとコレクターは順電流方向にコンパレータ４の正電
源端子と単電池１の正極に接続される。端子電圧が高い
ときＰＮＰトランジスタ１４はエミッターとベース間の
電圧が高いので導通状態にあり、コンパレータ４への給
電がなされる。低いときはトランジスタ１４は遮断状態
になり、コンパレータ４は作動できない。これによりコ
ンパレータ４は第１の実施例と同様な作動をし、回路全
体は第１の実施例と同様に単電池１を過放電させること
のない効果が得られる。The Zener diode 15 and the resistor 16 generate the reference voltage V3 and the PNP transistor 16
Applied to the base of. The emitter and collector of the PNP transistor 14 are connected to the positive power supply terminal of the comparator 4 and the positive electrode of the unit cell 1 in the forward current direction. When the terminal voltage is high, the PNP transistor 14 is in the conductive state because the voltage between the emitter and the base is high, and the comparator 4 is supplied with power. When it is low, the transistor 14 is cut off and the comparator 4 cannot operate. As a result, the comparator 4 operates in the same manner as in the first embodiment, and the entire circuit has the same effect as in the first embodiment without over-discharging the unit cell 1.
【００１１】図３は本発明の第３の実施例を示す回路図
である。この実施例は、第２の実施例のコンパレータ４
の正電源端子に設けられたＰＮＰ形トランジスタ１４の
代わりにＰＮＰ形トランジスタ１７を用い、ＮＰＮ形ト
ランジスタ２とを直列に接続したものである。トランジ
スタ１７のベースには基準電圧Ｖ３が印加される。端子
電圧が低いときコンパレータ４は作動できるものの、Ｐ
ＮＰトランジスタ１７はエミッターとベース間の電圧が
低いので遮断状態にあり、バイパス電流が発生しない。
端子電圧が高くなるとＰＮＰトランジスタ１７は導通状
態になり、バイパス電流を発生することができる。これ
により回路全体は第１、第２の実施例と同様な働きを
し、第１の実施例と同様に単電池１を過放電させること
のない効果が得られる。FIG. 3 is a circuit diagram showing a third embodiment of the present invention. This embodiment is similar to the comparator 4 of the second embodiment.
A PNP transistor 17 is used instead of the PNP transistor 14 provided at the positive power supply terminal of the above, and the NPN transistor 2 is connected in series. The reference voltage V3 is applied to the base of the transistor 17. Although the comparator 4 can operate when the terminal voltage is low, P
Since the voltage between the emitter and the base of the NP transistor 17 is low, the NP transistor 17 is in the cutoff state, and no bypass current is generated.
When the terminal voltage becomes high, the PNP transistor 17 becomes conductive, and a bypass current can be generated. As a result, the entire circuit functions similarly to the first and second embodiments, and the same effect as that of the first embodiment can be obtained without over-discharging the unit cell 1.
【００１２】[0012]
【発明の効果】以上の通り、本発明によれば、電圧検出
手段は２次電池の端子電圧を検出し、バイパス量制御手
段は端子電圧の検出値に基づきバイパス手段によって充
電電流をバイパスさせ、端子電圧を所定範囲内に制御す
る充電電流バイパス回路において、過放電防止手段を設
けて、端子電圧が所定値以上の場合は上記制御を行なわ
せ、以下の場合はバイパス手段の作動またはバイパス量
制御手段によるバイパス手段の制御作動を不能としてバ
イパス電流の発生を防止するようにしたから、バイパス
手段の作動により２次電池が所定値以下まで放電される
ことがなく、２次電池を劣化させずに充電電流をバイパ
スすることができる。これにより、２次電池からなる複
数の単電池を直列に接続して組電池として使用するとき
に各単電池ごとに均等な充電ができ、充放電回数が延び
る効果が得られる。As described above, according to the present invention, the voltage detection means detects the terminal voltage of the secondary battery, the bypass amount control means causes the bypass means to bypass the charging current based on the detected value of the terminal voltage, In a charging current bypass circuit for controlling a terminal voltage within a predetermined range, an over-discharge prevention means is provided to perform the above control when the terminal voltage is a predetermined value or more, and in the following cases , the operation of the bypass means or the bypass amount control Since the control operation of the bypass means by the means is disabled to prevent the generation of the bypass current, the operation of the bypass means does not discharge the secondary battery to a predetermined value or less, and the secondary battery is prevented. The charging current can be bypassed without degrading. As a result, when a plurality of single cells composed of secondary batteries are connected in series and used as an assembled battery, uniform charging can be performed for each single cell, and an effect of extending the number of charge and discharge can be obtained. .
【図１】第１の実施例を示す回路図である。FIG. 1 is a circuit diagram showing a first embodiment.
【図２】第２の実施例を示す回路図である。FIG. 2 is a circuit diagram showing a second embodiment.
【図３】第３の実施例を示す回路図である。FIG. 3 is a circuit diagram showing a third embodiment.
【図４】従来例を示す回路図である。FIG. 4 is a circuit diagram showing a conventional example.
１、２１ 単電池 ２、２２ ＮＰＮトランジスタ ３、５、８、９、１０、１１、１３ 抵抗 ４ コンパレータ ６、１５、２６ ツェナダイオード ７ 可変抵抗 １４、１７ ＰＮＰトランジスタ １６、２３、２５、２８、２９ 抵抗 1, 21Single cell 2.22 NPN transistor 3, 5, 8, 9, 10, 11, 13 resistance 4 comparator 6,15,26 Zener diode 7 Variable resistance 14, 17 PNP transistor 16,23,25,28,29 Resistance
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平６−253463（ＪＰ，Ａ) 特開 平６−165399（ＪＰ，Ａ) 特開 平５−111177（ＪＰ，Ａ) 特開 平４−299032（ＪＰ，Ａ) 特開 平７−255134（ＪＰ，Ａ) 特開 平５−64377（ＪＰ，Ａ) 特開 平７−308028（ＪＰ，Ａ) 特開 昭53−55747（ＪＰ，Ａ) 実開 平５−33646（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) H02J 7/00 - 7/10 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-6-253463 (JP, A) JP-A-6-165399 (JP, A) JP-A-5-111177 (JP, A) JP-A-4- 299032 (JP, A) JP 7-255134 (JP, A) JP 5-64377 (JP, A) JP 7-308028 (JP, A) JP 53-55747 (JP, A) 5-33646 (JP, U) (58) Fields surveyed (Int.Cl. 7 , DB name) H02J 7/ 00-7/ 10
Claims (4)
手段と、該２次電池の両端に接続され充電時に前記２次
電池への充電電流の一部または全部をバイパスするよう
に作動するバイパス手段と、前記電圧検出手段の検出値
に基づき前記２次電池の端子電圧が所定の範囲内になる
ように前記バイパス手段を作動させて前記充電電流のバ
イパス量を制御するバイパス量制御手段とを備える２次
電池の充電電流バイパス回路において、 上記２次電池の端子電圧が所定値より低いときに、前記
バイパス手段の作動または前記バイパス量制御手段によ
る前記バイパス手段の制御作動を不能とし、上記バイパ
ス電流の発生を防止する過放電防止手段を設けたことを
特徴とする２次電池の充電電流バイパス回路。1. A voltage detection means for detecting a terminal voltage of a secondary battery, and a voltage detection means connected to both ends of the secondary battery so as to bypass a part or all of a charging current to the secondary battery during charging.
A bypass means operates, bar of the charging current the terminal voltage of the secondary battery based on the detected value of the voltage detecting means by operating the bypass means to be within a predetermined range
In a charging current bypass circuit for a secondary battery, which comprises a bypass amount control means for controlling an bypass amount, when the terminal voltage of the secondary battery is lower than a predetermined value , the operation of the bypass means or the bypass amount control means is performed.
2. A charging current bypass circuit for a secondary battery, which is provided with an over-discharge prevention unit that disables the control operation of the bypass unit and prevents the generation of the bypass current.
に接続されるトランジスタにより構成され、 前記バイパス量制御手段は、前記２次電池の端子電圧と
基準電圧とを比較して、比較結果に基づいて前記トラン
ジスタを作動させるとともに、前記２次電池から作動電
源が供給されて作動するコンパレータを備え、前記過放電防止手段は、前記２次電池の 端子電圧が所定
値より低いとき前記コンパレータへの給電圧がその作動
電圧より低くなるように設定して構成され、前記コンパ
レータの作動停止により前記トランジスタにバイパス電
流の発生を防止するようにしたことを特徴とする請求項
１記載の２次電池の充電電流バイパス回路。2. The bypass means is composed of a transistor connected in parallel with the secondary battery, and the bypass amount control means is a terminal voltage of the secondary battery.
Compare with the reference voltage, and based on the comparison result,
It actuates the register, operating electricity from the secondary battery
A comparator that is operated by being supplied with a power source, and the overdischarge prevention unit is configured to set the supply voltage to the comparator to be lower than the operating voltage when the terminal voltage of the secondary battery is lower than a predetermined value. The charging current bypass circuit for the secondary battery according to claim 1, wherein the operation of the comparator is stopped to prevent generation of a bypass current in the transistor.
に接続される第１のトランジスタにより構成され、 前記バイパス量制御手段は、前記２次電池の端子電圧と
基準電圧とを比較して、比較結果に基づいて前記第１の
トランジスタを作動させるとともに、前記２次電池から
作動電源が供給されて作動するコンパレータを有し、前記 過放電防止手段は、前記コンパレータへの作動電源
の供給を制御する第２のトランジスタを備え、前記２次
電池の端子電圧が所定値より低いときに前記第２のトラ
ンジスタが前記コンパレータへの作動電源の供給を停止
することにより前記コンパレータの作動を停止させて、
前記第１のトランジスタにバイパス電流の発生を防止す
ることを特徴とする請求項１記載の２次電池の充電電流
バイパス回路。3. The bypass means is composed of a first transistor connected in parallel with the secondary battery, and the bypass amount control means is a terminal voltage of the secondary battery.
The reference voltage is compared, and the first voltage is compared based on the comparison result.
While operating the transistor, from the secondary battery
Has a comparator operating power to operate is supplied, the over-discharge preventing means operating power to the comparator
A second transistor for controlling supply of said secondary
When the terminal voltage of the battery is lower than a predetermined value, the second transistor
Njisuta is to stop the operation of the comparator by stopping the supply of the operating power to the comparator,
The charging current bypass circuit for a secondary battery according to claim 1, wherein a bypass current is prevented from being generated in the first transistor.
に接続される第１のトランジスタにより構成され、 前記過放電防止手段は、前記第１のトランジスタと直列
に接続して設けた第３のトランジスタを有し、前記２次
電池の端子電圧が所定値より低いときに前記第３のトラ
ンジスタのバイパス電流通路を遮断することにより前記
バイパス電流の発生を防止することを特徴とする請求項
１記載の２次電池の充電電流バイパス回路。4. The bypass means comprises a first transistor connected in parallel with the secondary battery, and the overdischarge prevention means comprises a third transistor connected in series with the first transistor . Having a transistor, the secondary
The secondary current according to claim 1, wherein the bypass current is prevented by blocking the bypass current path of the third transistor when the terminal voltage of the battery is lower than a predetermined value. Battery charging current bypass circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33824794A JP3451768B2 (en) | 1994-12-27 | 1994-12-27 | Rechargeable battery charge current bypass circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33824794A JP3451768B2 (en) | 1994-12-27 | 1994-12-27 | Rechargeable battery charge current bypass circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08182216A JPH08182216A (en) | 1996-07-12 |
| JP3451768B2 true JP3451768B2 (en) | 2003-09-29 |
Family
ID=18316317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33824794A Expired - Fee Related JP3451768B2 (en) | 1994-12-27 | 1994-12-27 | Rechargeable battery charge current bypass circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3451768B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100350879B1 (en) * | 1996-08-20 | 2002-11-18 | 기아자동차주식회사 | Overcharge controller using variable resistance in electric vehicle |
| TW522583B (en) * | 1999-03-18 | 2003-03-01 | Seiko Epson Corp | Electronic machine and control method thereof |
| JP3872057B2 (en) * | 2003-12-24 | 2007-01-24 | 三菱電機株式会社 | Battery device overvoltage protection circuit |
| JP6266248B2 (en) * | 2013-07-19 | 2018-01-24 | サイプレス セミコンダクター コーポレーション | Semiconductor device, discharge control system, and control method |
| CN106772088A (en) * | 2016-12-28 | 2017-05-31 | 浙江威星智能仪表股份有限公司 | A kind of tool circuit of automatic batch detection lithium thionyl chloride cell |
-
1994
- 1994-12-27 JP JP33824794A patent/JP3451768B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08182216A (en) | 1996-07-12 |
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