JP3524675B2 - Battery charge / discharge control device - Google Patents
Battery charge / discharge control deviceInfo
- Publication number
- JP3524675B2 JP3524675B2 JP11887096A JP11887096A JP3524675B2 JP 3524675 B2 JP3524675 B2 JP 3524675B2 JP 11887096 A JP11887096 A JP 11887096A JP 11887096 A JP11887096 A JP 11887096A JP 3524675 B2 JP3524675 B2 JP 3524675B2
- Authority
- JP
- Japan
- Prior art keywords
- charge
- secondary battery
- control switch
- discharge control
- battery
- 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
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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Protection Of Static Devices (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、電池の充放電制
御、具体的には、電池の過充放電、過電流放電、大電圧
充電、逆充電並びに短絡を防止して、適宜の充放電を行
うことができるようにする電池の充放電制御装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to charging / discharging control of a battery, and more specifically, to prevent overcharging / discharging, overcurrent discharging, high voltage charging, reverse charging and short circuit of the battery to perform appropriate charging / discharging. The present invention relates to a battery charge / discharge control device capable of performing the operation.
【０００２】[0002]
【従来の技術】ニッケルカドミウム電池、ニッケル水素
電池またはリチウムイオン電池等の放電可能な二次電池
は、小型軽量化の進むコードレス電話機、携帯電話機や
ノートパソコン等の携帯用電機機器の電源として利用さ
れている。2. Description of the Related Art A dischargeable secondary battery such as a nickel-cadmium battery, a nickel-hydrogen battery or a lithium-ion battery is used as a power source for portable electric devices such as cordless phones, mobile phones and notebook computers, which are becoming smaller and lighter. ing.
【０００３】このような二次電池は、通常パック電池の
形態で使用されることが多いが、このようなパック電池
は、電極端子が短絡しやすい構造となっている場合が多
い。パック電池の電極端子が短絡すると、二次電池に過
大な電流が流れ、電池性能を低下を招く。更に、ジュー
ル熱により、二次電池や金属部材を加熱して、危険を招
く恐れがある。Such a secondary battery is usually used in the form of a battery pack, but such a battery battery often has a structure in which electrode terminals are easily short-circuited. If the electrode terminals of the battery pack are short-circuited, an excessive current will flow to the secondary battery, resulting in deterioration of battery performance. Further, the Joule heat may heat the secondary battery or the metal member and cause a danger.
【０００４】そこで、パック電池における短絡事故を防
止するものとして、電気機器への非装着時に、パック電
池の電極端子をスライド可能なシャッターにて被覆する
構造（実公昭５９−１９３３６号公報参照）や、電気機
器への装着に伴って操作される可動接点を備えたスイッ
チング素子を設ける構造（実開平４−４７２５７号公
報）等がある。Therefore, in order to prevent a short circuit accident in the battery pack, a structure in which the electrode terminals of the battery pack are covered with a slidable shutter when the battery pack is not attached to an electric device (see Japanese Utility Model Publication No. 59-19336). , A structure in which a switching element having a movable contact that is operated in association with mounting on an electric device is provided (Japanese Utility Model Laid-Open No. 4-47257).
【０００５】こうしたパック電池は、電極端子の短絡に
よる二次電池のショートを防止できるものの、機械的構
造によるものであるため、長期間にわたって確実に動作
させることが極めて難しい。Although such a battery pack can prevent a short circuit of the secondary battery due to a short circuit of the electrode terminals, it is extremely difficult to operate reliably for a long period of time because it has a mechanical structure.
【０００６】一方、二次電池の中でも、特にリチウムイ
オン電池は、過充放電による特性劣化が生じやすく、過
大電圧の印加による過充電等を防止する必要がある。On the other hand, among the secondary batteries, particularly lithium ion batteries are prone to characteristic deterioration due to overcharging and discharging, and it is necessary to prevent overcharging due to application of excessive voltage.
【０００７】[0007]
【発明が解決しようとする課題】そこで、本発明は、二
次電池のショート防止を電気的に行うことによって、簡
単且つ確実に、また長期間にわたって安定して行うよう
にするものである。SUMMARY OF THE INVENTION Therefore, the present invention intends to prevent short circuit of a secondary battery electrically so that the secondary battery can be easily and surely and stably performed for a long period of time.
【０００８】更に、本発明は、同時に電池の過充放電保
護、過電流放電保護、大電圧充電保護並びに逆充電保護
を簡単な回路で行うことができ、適宜の充放電を行うこ
とができるようにするものである。Further, according to the present invention, at the same time, overcharge / discharge protection, overcurrent discharge protection, large-voltage charge protection and reverse charge protection of a battery can be performed by a simple circuit, and appropriate charge / discharge can be performed. It is something to do.
【０００９】[0009]
【課題を解決するための手段】本発明における電池の充
放電制御装置は、二次電池と、この二次電池に直列接続
される充放電制御スイッチと、前記二次電池の電池電圧
または前記二次電池に流れる過電流を検出して前記充放
電制御スイッチをオンオフ制御する充放電制御回路と、
前記充放電制御スイッチ及び充放電制御回路の間に配設
され、制御端子に入力される制御信号に応答して、前記
充放電制御スイッチを制御する動作制御回路とを備えた
ことを特徴とするものである。A battery charge / discharge control device according to the present invention comprises a secondary battery, a charge / discharge control switch serially connected to the secondary battery, a battery voltage of the secondary battery or the secondary battery. A charging / discharging control circuit for detecting an overcurrent flowing in the secondary battery and controlling on / off of the charging / discharging control switch,
And an operation control circuit arranged between the charge / discharge control switch and the charge / discharge control circuit and controlling the charge / discharge control switch in response to a control signal inputted to a control terminal. It is a thing.
【００１０】更に、前記動作制御回路は、前記二次電池
に大電圧が印加されたこと、または前記二次電池に逆電
圧が印加されたこと、あるいは前記二次電池が短絡され
たことを検出して、前記制御端子への前記制御信号の印
加に関係なく前記充放電制御スイッチをオフ状態とす
る、換言すれば、前記制御端子に制御信号が入力されて
も、前記充放電制御スイッチをオフ状態に保持すること
を特徴とするものである。Further, the operation control circuit detects that a large voltage is applied to the secondary battery, a reverse voltage is applied to the secondary battery, or that the secondary battery is short-circuited. Then, the charge / discharge control switch is turned off regardless of the application of the control signal to the control terminal, in other words, even if the control signal is input to the control terminal, the charge / discharge control switch is turned off. It is characterized by being held in a state.
【００１１】[0011]
【発明の実施の形態】図１は本発明の一実施例であるパ
ック電池を示す回路図である。充電器または電気機器と
接続される電極端子Ｔ１及びＴ２間には、リチウムイオ
ン二次電池Ｂ（以下、単に二次電池という）と、放電制
御スイッチＱ１と、充電制御スイッチＱ２とが直列に接
続されている。放電制御スイッチＱ１及び充電制御スイ
ッチＱ２は、ＭＯＳＦＥＴから構成されており、夫々に
並列に接続されているダイオードは、各ＭＯＳＦＥＴの
寄生ダイオードである。FIG. 1 is a circuit diagram showing a battery pack which is an embodiment of the present invention. A lithium ion secondary battery B (hereinafter simply referred to as a secondary battery), a discharge control switch Q1, and a charge control switch Q2 are connected in series between electrode terminals T1 and T2 connected to a charger or an electric device. Has been done. The discharge control switch Q1 and the charge control switch Q2 are composed of MOSFETs, and the diode connected in parallel to each is a parasitic diode of each MOSFET.
【００１２】制御回路ＩＣは、過充電検出回路、過放電
検出回路及び過電流検出回路を内蔵しており、二次電池
Ｂの電池電圧及び二次電池Ｂに流れる電流を検出して、
放電制御スイッチＱ１及び充電制御スイッチＱ２をオン
オフ制御する。具体的には、入力端子ＩＮ１及びＩＮ２
間の電圧（即ち、二次電池Ｂの電池電圧）が過充電電圧
（例えば、４．１５Ｖ）以上になると、出力端子ＯＵＴ
２よりＨＩＧＨ信号を出力して充電制御スイッチＱ２を
オフ状態にする。また、入力端子ＩＮ１及びＩＮ２間の
電圧が過放電電圧（例えば、２．６０Ｖ）以下になる
と、出力端子ＯＵＴ１よりＬＯＷ信号を出力して放電制
御スイッチＱ１をオフ状態にする。更に、二次電池Ｂに
過電流（例えば、４Ａ以上）が流れ、入力端子ＩＮ３及
びＩＮ２間の電圧が過電流電圧以上になると、出力端子
ＯＵＴ１よりＬＯＷ信号を出力して放電制御スイッチＱ
１をオフ状態にする。The control circuit IC incorporates an overcharge detection circuit, an overdischarge detection circuit and an overcurrent detection circuit, detects the battery voltage of the secondary battery B and the current flowing in the secondary battery B,
The discharge control switch Q1 and the charge control switch Q2 are on / off controlled. Specifically, the input terminals IN1 and IN2
When the voltage between them (that is, the battery voltage of the secondary battery B) becomes equal to or higher than the overcharge voltage (for example, 4.15 V), the output terminal OUT
2 outputs a HIGH signal to turn off the charge control switch Q2. When the voltage between the input terminals IN1 and IN2 becomes equal to or lower than the overdischarge voltage (for example, 2.60V), the output terminal OUT1 outputs a LOW signal to turn off the discharge control switch Q1. Furthermore, when an overcurrent (for example, 4 A or more) flows in the secondary battery B and the voltage between the input terminals IN3 and IN2 becomes equal to or higher than the overcurrent voltage, a LOW signal is output from the output terminal OUT1 and the discharge control switch Q is output.
Turn 1 off.
【００１３】このような制御回路ＩＣとしては、ミツミ
電機株式会社製のリチウムイオン電池保護回路用ＩＣの
ＭＭ１２９１シリーズが好適である。As such a control circuit IC, the MM1291 series of lithium-ion battery protection circuit ICs manufactured by Mitsumi Electric Co., Ltd. is suitable.
【００１４】制御端子Ｔ３を含む動作制御回路ＣＯＮＴ
が、放電制御スイッチＱ１及び充電制御スイッチＱ２と
制御回路ＩＣとの間に配設されている。動作制御回路Ｃ
ＯＮＴは、制御端子Ｔ３に入力される信号に応答して、
放電制御スイッチＱ１及び充電制御スイッチＱ２を制御
する。Operation control circuit CONT including control terminal T3
Are arranged between the discharge control switch Q1 and the charge control switch Q2 and the control circuit IC. Operation control circuit C
The ONT responds to the signal input to the control terminal T3,
The discharge control switch Q1 and the charge control switch Q2 are controlled.
【００１５】以下、本実施例のパック電池の動作につい
て説明する。The operation of the battery pack of this embodiment will be described below.
【００１６】（１）パック電池の未接続の場合
制御端子Ｔ３はオープン状態となっており、ＦＥＴＱ３
はオン状態にある。従って、ＦＥＴＱ５はオフ状態であ
り、放電制御スイッチＱ１はオフ状態となる。また、Ｆ
ＥＴＱ３がオン状態であるため、ダイオードＤ１がバイ
アスされてトランジスタＱ６がオン状態となる。その結
果、充電制御スイッチＱ２もオフ状態を保つ。(1) When the battery pack is not connected, the control terminal T3 is open, and the FET Q3
Is on. Therefore, the FET Q5 is off and the discharge control switch Q1 is off. Also, F
Since ETQ3 is on, diode D1 is biased and transistor Q6 is on. As a result, the charge control switch Q2 also remains off.
【００１７】このように、パック電池の未接続の場合、
放電制御スイッチＱ１及び充電制御スイッチＱ２はオフ
状態となり、二次電池Ｂの充放電が禁止される。従っ
て、電極端子Ｔ１、Ｔ２が短絡されたとしても、二次電
池Ｂがショートすることはない。In this way, when the battery pack is not connected,
The discharge control switch Q1 and the charge control switch Q2 are turned off, and charging / discharging of the secondary battery B is prohibited. Therefore, even if the electrode terminals T1 and T2 are short-circuited, the secondary battery B will not be short-circuited.
【００１８】（２）制御端子Ｔ３にオン信号を入力した
場合
ＦＥＴＱ４が、このゲートに接続されているコンデンサ
Ｃと抵抗Ｒの並列回路の時定数で定められる時間の間オ
ン状態となる。その結果、ＦＥＴＱ５のゲート電位が低
下し、ＦＥＴＱ５がオン状態となる。このため、二次電
池Ｂの電池電圧が過放電電圧に至っていない場合、出力
端子ＯＵＴ１から出力されるＨＩＧＨ信号によって、放
電制御スイッチＱ１はオン状態となり、二次電池Ｂは放
電可能状態となる。(2) When an ON signal is input to the control terminal T3 The FET Q4 is in the ON state for the time determined by the time constant of the parallel circuit of the capacitor C and the resistor R connected to this gate. As a result, the gate potential of the FET Q5 is lowered and the FET Q5 is turned on. Therefore, when the battery voltage of the secondary battery B has not reached the over-discharge voltage, the HIGH signal output from the output terminal OUT1 turns on the discharge control switch Q1 and puts the secondary battery B in a dischargeable state.
【００１９】一方、ＦＥＴＱ３がオフ状態となることに
より、ダイオードＤ１のバイアス電圧がなくなる。従っ
て、二次電池Ｂの電池電圧が過充電電圧以下である場
合、出力端子ＯＵＴ２がハイインピーダンス状態である
ため、トランジスタＱ６がオフ状態とされて充電制御ス
イッチＱ２はオン状態となり、二次電池Ｂは充電可能状
態となる。On the other hand, when the FET Q3 is turned off, the bias voltage of the diode D1 disappears. Therefore, when the battery voltage of the secondary battery B is equal to or lower than the overcharge voltage, the output terminal OUT2 is in the high impedance state, so that the transistor Q6 is turned off and the charge control switch Q2 is turned on. Is in a chargeable state.
【００２０】以上のように、制御端子Ｔ３にオン信号が
入力されることにより、放電制御スイッチＱ１及び充電
制御スイッチＱ２は、制御回路ＩＣよりの出力信号によ
ってオンオフ制御されるようになる。As described above, by inputting the ON signal to the control terminal T3, the discharge control switch Q1 and the charge control switch Q2 are ON / OFF controlled by the output signal from the control circuit IC.
【００２１】（３）パック電池を電気機器（即ち、負
荷）に装着した後、制御端子Ｔ３にオン信号を入力した
場合
制御端子Ｔ３はオープン状態となっており、放電制御ス
イッチＱ１及び充電制御スイッチＱ２はオフ状態であ
る。(3) When the ON signal is input to the control terminal T3 after the battery pack is mounted on the electric device (ie, the load), the control terminal T3 is in the open state, and the discharge control switch Q1 and the charge control switch Q2 is off.
【００２２】この状態で、パック電池を電気機器（図示
せず）に装着（即ち、電極端子Ｔ１及びＴ２間に電気機
器を接続）すると、二次電池Ｂの放電電流は、電極端子
Ｔ１→電気機器（図示せず）→電極端子Ｔ２→充電制御
スイッチＱ２の寄生ダイオード→抵抗Ｒ１→入力端子Ｉ
Ｎ３の経路で流れ、入力端子ＩＮ３の電位は、（二次電
池Ｂの電圧−寄生ダイオードに基づく電圧降下分）とな
る。この電位は過電流電圧より大きく、制御回路ＩＣは
過電流状態であると認識する。従って、出力端子ＯＵＴ
１はＬＯＷ信号を出力するため、放電制御スイッチＱ１
はオフ状態を保持する。In this state, when the battery pack is attached to an electric device (not shown) (that is, the electric device is connected between the electrode terminals T1 and T2), the discharge current of the secondary battery B changes from the electrode terminal T1 to the electric power. Equipment (not shown) → electrode terminal T2 → parasitic diode of charge control switch Q2 → resistor R1 → input terminal I
It flows through the path of N3, and the potential of the input terminal IN3 becomes (voltage of secondary battery B-voltage drop due to parasitic diode). This potential is larger than the overcurrent voltage, and the control circuit IC recognizes that it is in the overcurrent state. Therefore, the output terminal OUT
1 outputs a LOW signal, the discharge control switch Q1
Keeps off.
【００２３】ここで制御端子Ｔ３にオン信号を入力する
と、ＦＥＴＱ４は、このゲートに接続されているコンデ
ンサＣと抵抗Ｒの並列回路の時定数で定められる時間の
間オン状態となる。その結果、ａ点電位（即ち、入力端
子ＩＮ３の電位）は、二次電池Ｂの−端子の電位（即
ち、０Ｖ）となるため、制御回路ＩＣは過電流状態の検
出を解除し、出力端子ＯＵＴ１よりＨＩＧＨ信号を出力
する。When an ON signal is input to the control terminal T3, the FET Q4 is turned on for a time determined by the time constant of the parallel circuit of the capacitor C and the resistor R connected to this gate. As a result, the potential at the point a (that is, the potential of the input terminal IN3) becomes the potential of the-terminal of the secondary battery B (that is, 0 V), so that the control circuit IC cancels the detection of the overcurrent state and outputs the output terminal. A HIGH signal is output from OUT1.
【００２４】一方、ａ点電位が０Ｖになったことによ
り、ＦＥＴＱ５のゲート電位が低下し、ＦＥＴＱ５がオ
ン状態となる。このため、出力端子ＯＵＴ１から出力さ
れるＨＩＧＨ信号によって、放電制御スイッチＱ１はオ
ン状態となり、二次電池Ｂは放電可能状態となる。On the other hand, since the potential at the point a becomes 0 V, the gate potential of the FET Q5 is lowered and the FET Q5 is turned on. Therefore, the HIGH signal output from the output terminal OUT1 turns on the discharge control switch Q1 and puts the secondary battery B in a dischargeable state.
【００２５】（４）パック電池の電極端子Ｔ１、Ｔ２に
大電圧が印加された状態で、制御端子Ｔ３にオン信号を
入力した場合
二次電池Ｂの充電を行うために、電極端子Ｔ１、Ｔ２間
に接続した充電器の異常により、大電圧（例えば、１０
Ｖ）が印加されたとする。制御端子Ｔ３にオン信号が入
力される前にあっては、ＦＥＴＱ３がオン状態であるた
め、ダイオードＤ１がバイアスされ、トランジスタＱ６
がオン状態となる。その結果、充電制御スイッチＱ２は
オフ状態を保つ。(4) When a high voltage is applied to the electrode terminals T1 and T2 of the battery pack and an ON signal is input to the control terminal T3 In order to charge the secondary battery B, the electrode terminals T1 and T2 are charged. Due to an abnormality in the charger connected between them, a large voltage (for example, 10
V) is applied. Before the ON signal is input to the control terminal T3, since the FET Q3 is in the ON state, the diode D1 is biased and the transistor Q6
Turns on. As a result, the charge control switch Q2 remains off.
【００２６】制御端子Ｔ３にオン信号が入力されると、
ＥＦＴＱ３がオフ状態なり、既述の如く、放電制御スイ
ッチＱ１がオン状態となる。一方、電極端子Ｔ１、Ｔ２
に印加される電圧が大電圧であるため、電極端子Ｔ１→
二次電池Ｂ→放電制御スイッチＱ１→抵抗Ｒ１→抵抗Ｒ
２→ダイオードＤ１→トランジスタＱ６の経路でバイア
ス電流が流れ、トランジスタＱ６はオン状態を保持す
る。従って、充電制御スイッチＱ２はオン状態とならず
にオフ状態を保持することとなる。When an ON signal is input to the control terminal T3,
The EFT Q3 is turned off, and the discharge control switch Q1 is turned on as described above. On the other hand, the electrode terminals T1 and T2
Since the voltage applied to the electrode is a large voltage, the electrode terminal T1 →
Secondary battery B → discharge control switch Q1 → resistor R1 → resistor R
A bias current flows through the path of 2 → diode D1 → transistor Q6, and the transistor Q6 maintains the ON state. Therefore, the charge control switch Q2 is kept in the off state without being turned on.
【００２７】なお、二次電池Ｂは前述のバイアス電流に
より充電されることとなるが、抵抗Ｒ２を大きくするこ
とによって、バイアス電流の大きさを十分に小さくして
二次電池Ｂを保護することができる。The secondary battery B is charged by the above-mentioned bias current. However, by increasing the resistance R2, the magnitude of the bias current can be sufficiently reduced to protect the secondary battery B. You can
【００２８】このように、電極端子Ｔ１、Ｔ２に印加さ
れる電圧が異常に大きい場合には、例え制御端子にオン
信号が入力されても、充電制御スイッチＱ２をオフ状態
に保持して、二次電池Ｂを保護することができる。な
お、この大電圧保護を行うための設定電圧値は、抵抗Ｒ
１、Ｒ２、Ｒ３と抵抗Ｒ４との分圧比及びダイオードＤ
１のバイアス電位等により適宜に設定される。As described above, when the voltage applied to the electrode terminals T1 and T2 is abnormally large, the charge control switch Q2 is held in the off state even if an ON signal is input to the control terminal, The secondary battery B can be protected. The set voltage value for carrying out this large voltage protection is the resistance R
1, R2, R3 and resistor R4 voltage division ratio and diode D
The bias potential of 1 is set appropriately.
【００２９】（５）電極端子Ｔ１、Ｔ２に逆電圧が印加
された状態で、制御端子Ｔ３にオン信号を入力した場合
制御端子Ｔ３よりオン信号が入力されることにより、既
述の如く、放電制御スイッチＱ１及び充電制御スイッチ
Ｑ２がオン状態となり、二次電池Ｂは逆充電される状態
となる。斯る逆充電により、ａ点電位は（電極端子Ｔ
１、Ｔ２間に印加される逆電圧＋二次電池Ｂの電池電
圧）となって、ＦＥＴＱ５のゲート電位が上がり、この
ＦＥＴＱ５はオフ状態となる。その結果、放電制御スイ
ッチＱ１がオフ状態となり、二次電池Ｂの逆充電が遮断
され、以後逆充電状態が解消されるまで、この状態が継
続される。(5) When an ON signal is input to the control terminal T3 while the reverse voltage is applied to the electrode terminals T1 and T2, the ON signal is input from the control terminal T3, and as described above, the discharge is performed. The control switch Q1 and the charge control switch Q2 are turned on, and the secondary battery B is reversely charged. Due to such reverse charging, the potential at the point a becomes (electrode terminal T
The reverse voltage applied between 1 and T2 + the battery voltage of the secondary battery B), the gate potential of the FET Q5 rises, and the FET Q5 is turned off. As a result, the discharge control switch Q1 is turned off, the reverse charging of the secondary battery B is interrupted, and this state is continued until the reverse charging state is resolved.
【００３０】（６）電極端子Ｔ１、Ｔ２が短絡された状
態で、制御端子Ｔ３にオン信号を入力した場合
制御端子Ｔ３よりオン信号が入力されることにより、既
述の如く、放電制御スイッチＱ１及び充電制御スイッチ
Ｑ２がオン状態となる。二次電池Ｂは短絡された状態で
あるため、ａ点電位は二次電池Ｂの電池電圧となって、
ＦＥＴＱ５のゲート電位が上がり、このＦＥＴＱ５はオ
フ状態となる。その結果、放電制御スイッチＱ１がオフ
状態となり、二次電池Ｂの短絡状態が遮断され、以後短
絡状態が解消されるまで、この状態が保持される。(6) When an ON signal is input to the control terminal T3 while the electrode terminals T1 and T2 are short-circuited: The ON signal is input from the control terminal T3, and as described above, the discharge control switch Q1. And the charge control switch Q2 is turned on. Since the secondary battery B is short-circuited, the point a potential becomes the battery voltage of the secondary battery B,
The gate potential of the FET Q5 rises and the FET Q5 is turned off. As a result, the discharge control switch Q1 is turned off, the short circuit state of the secondary battery B is interrupted, and this state is maintained until the short circuit state is resolved thereafter.
【００３１】図２は本発明の他の実施例を示す回路図で
ある。この実施例は、動作制御回路ＣＯＮＴを構成する
ＦＥＴＱ５を、二次電池Ｂの＋側電極と制御回路ＩＣの
入力端子ＩＮ１との間に接続した点においてのみ、前述
の実施例と異なる。この実施例における動作について
は、実質的に先の実施例と同様であり、前述の説明及び
図２の回路図を参照すれば、容易に理解することができ
るものと思料するため、詳細な説明は割愛する。FIG. 2 is a circuit diagram showing another embodiment of the present invention. This embodiment differs from the above-mentioned embodiments only in that the FET Q5 constituting the operation control circuit CONT is connected between the + side electrode of the secondary battery B and the input terminal IN1 of the control circuit IC. The operation of this embodiment is substantially the same as that of the previous embodiment, and it is thought that it can be easily understood with reference to the above description and the circuit diagram of FIG. Omit.
【００３２】[0032]
【発明の効果】本発明の電池の充放電制御装置は、二次
電池と、この二次電池に直列接続される充放電制御スイ
ッチと、前記二次電池の電池電圧または前記二次電池に
流れる過電流を検出して前記充放電制御スイッチをオン
オフ制御する充放電制御回路と、前記充放電制御スイッ
チ及び充放電制御回路の間に配設され、制御端子に入力
される制御信号に応答して、前記充放電制御スイッチを
制御する動作制御回路とを備えているので、二次電池の
ショート防止を簡単且つ確実に、また長期間にわたって
安定して行うことができる。The battery charge / discharge control apparatus according to the present invention includes a secondary battery, a charge / discharge control switch connected in series with the secondary battery, and the battery voltage of the secondary battery or the secondary battery. A charge / discharge control circuit that detects an overcurrent and controls the charge / discharge control switch to turn on / off, and is arranged between the charge / discharge control switch and the charge / discharge control circuit, and responds to a control signal input to a control terminal. Since it is provided with an operation control circuit for controlling the charge / discharge control switch, it is possible to easily and reliably prevent the short circuit of the secondary battery and stably perform it for a long period of time.
【００３３】更に、本発明は、電池の過充放電保護、過
電流放電保護、大電圧充電保護並びに逆充電保護をも行
うことができ、適宜の充放電を行うことができる。Further, according to the present invention, battery overcharge / discharge protection, overcurrent discharge protection, large voltage charge protection and reverse charge protection can be carried out, and appropriate charge / discharge can be carried out.
【図１】本発明の一実施例を示す回路図である。FIG. 1 is a circuit diagram showing an embodiment of the present invention.
【図２】本発明の他の実施例を示す回路図である。FIG. 2 is a circuit diagram showing another embodiment of the present invention.
Ｂ 二次電池 Ｑ１ 放電制御スイッチ Ｑ２ 充電制御スイッチ ＩＣ 制御回路 ＣＯＮＴ 動作制御回路 B secondary battery Q1 discharge control switch Q2 charge control switch IC control circuit CONT operation control circuit
フロントページの続き (56)参考文献 特開 平７−29554（ＪＰ，Ａ) 特開 平７−184318（ＪＰ，Ａ) 特開 平８−111941（ＪＰ，Ａ) 特開 平８−140273（ＪＰ，Ａ) 特開 平９−17455（ＪＰ，Ａ) 特開 平９−19071（ＪＰ，Ａ) 特開 平９−50826（ＪＰ，Ａ) 特開 平９−180690（ＪＰ，Ａ) 実開 平４−47257（ＪＰ，Ｕ) 実開 昭55−131063（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) H02J 7/00 H01M 10/44 H02H 7/18 Continuation of front page (56) Reference JP-A-7-29554 (JP, A) JP-A-7-184318 (JP, A) JP-A-8-111941 (JP, A) JP-A-8-140273 (JP , A) JP 9-17455 (JP, A) JP 9-19071 (JP, A) JP 9-50826 (JP, A) JP 9-180690 (JP, A) 4-47257 (JP, U) Actual development Sho 55-131063 (JP, U) (58) Fields investigated (Int.Cl. 7 , DB name) H02J 7/00 H01M 10/44 H02H 7/18
Claims (3)
れる充放電制御スイッチと、前記二次電池の電池電圧ま
たは前記二次電池に流れる過電流を検出して前記充放電
制御スイッチをオンオフ制御する充放電制御回路と、前
記充放電制御スイッチ及び充放電制御回路の間に配設さ
れ、制御端子に入力される制御許可信号に応答して、前
記充放電制御スイッチを制御する動作制御回路とを備
え、更に、前記動作制御回路は、前記二次電池に大電圧
が印加されたことを検出して、前記制御端子への前記制
御許可信号の印加に関係なく前記充放電制御スイッチを
オフ状態とすることを特徴とする電池の充放電制御装
置。1. A rechargeable battery, a charge / discharge control switch connected in series with the rechargeable battery, the battery voltage of the rechargeable battery or an overcurrent flowing in the rechargeable battery, and the charge / discharge control switch. An operation for controlling the charge / discharge control switch in response to a control permission signal input to a control terminal, the charge / discharge control circuit being for controlling ON / OFF of the switch, and the charge / discharge control switch and the charge / discharge control circuit. And a control circuit , wherein the operation control circuit further comprises a large voltage to the secondary battery.
Is detected, the control to the control terminal is controlled.
Use the charge / discharge control switch regardless of the application of the permission signal.
A battery charging / discharging control device, which is turned off .
れる充放電制御スイッチと、前記二次電池の電池電圧ま
たは前記二次電池に流れる過電流を検出して前記充放電
制御スイッチをオンオフ制御する充放電制御回路と、前
記充放電制御スイッチ及び充放電制御回路の間に配設さ
れ、制御端子に入力される制御許可信号に応答して、前
記充放電制御スイッチを制御する動作制御回路とを備
え、更に、前記動作制御回路は、前記二次電池に逆電圧
が印加されたことを検出して、前記制御端子への前記制
御許可信号の印加に関係なく前記充放電制御スイッチを
オフ状態とすることを特徴とする電池の充放電制御装
置。2. A secondary battery and a series connection to the secondary battery.
The charging / discharging control switch and the battery voltage of the secondary battery.
Alternatively, the charging / discharging is performed by detecting an overcurrent flowing in the secondary battery.
The charge / discharge control circuit that controls the on / off of the control switch
Installed between the charge / discharge control switch and the charge / discharge control circuit.
In response to the control enable signal input to the control terminal,
Equipped with an operation control circuit that controls the charge / discharge control switch
Further, the operation control circuit detects that a reverse voltage is applied to the secondary battery, and turns off the charge / discharge control switch regardless of the application of the control permission signal to the control terminal. A charging / discharging control device for a battery, characterized by:
れる充放電制御スイッチと、前記二次電池の電池電圧ま
たは前記二次電池に流れる過電流を検出して前記充放電
制御スイッチをオンオフ制御する充放電制御回路と、前
記充放電制御スイッチ及び充放電制御回路の間に配設さ
れ、制御端子に入力される制御許可信号に応答して、前
記充放電制御スイッチを制御する動作制御回路とを備
え、更に、前記動作制御回路は、前記二次電池が短絡さ
れたことを検出して、前記制御端子への前記制御許可信
号の印加に関係なく前記充放電制御スイッチをオフ状態
とすることを特徴とする電池の充放電制御装置。3. A secondary battery and a series connection to the secondary battery.
The charging / discharging control switch and the battery voltage of the secondary battery.
Alternatively, the charging / discharging is performed by detecting an overcurrent flowing in the secondary battery.
The charge / discharge control circuit that controls the on / off of the control switch
Installed between the charge / discharge control switch and the charge / discharge control circuit.
In response to the control enable signal input to the control terminal,
Equipped with an operation control circuit that controls the charge / discharge control switch
In addition, the operation control circuit detects that the secondary battery is short-circuited, and the charging control signal is applied regardless of the application of the control permission signal to the control terminal. A charge / discharge control device for a battery, wherein a discharge control switch is turned off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11887096A JP3524675B2 (en) | 1996-05-14 | 1996-05-14 | Battery charge / discharge control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11887096A JP3524675B2 (en) | 1996-05-14 | 1996-05-14 | Battery charge / discharge control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09308114A JPH09308114A (en) | 1997-11-28 |
| JP3524675B2 true JP3524675B2 (en) | 2004-05-10 |
Family
ID=14747163
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11887096A Expired - Fee Related JP3524675B2 (en) | 1996-05-14 | 1996-05-14 | Battery charge / discharge control device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3524675B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103904714A (en) * | 2012-12-28 | 2014-07-02 | 深圳市沃特玛电池有限公司 | High-current charge and discharge circuit of battery capacity grading cabinet |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6194869B1 (en) * | 1998-05-21 | 2001-02-27 | Paul E. Peterzell | Circuit to connect battery to load only in presence of a load of acceptable magnitude |
| JP3940508B2 (en) * | 1998-11-20 | 2007-07-04 | 株式会社東芝 | Secondary battery protection circuit device |
| JP2000284874A (en) * | 1999-03-31 | 2000-10-13 | Mitsumi Electric Co Ltd | Conversion connector |
| KR100904160B1 (en) * | 2007-09-05 | 2009-06-22 | 주식회사 다산네트웍스 | Apparatus for protecting battery in communication system |
| JP4297452B2 (en) * | 2007-12-27 | 2009-07-15 | 株式会社リコー | Charge / discharge protection circuit |
| CN102170117B (en) * | 2011-04-27 | 2014-02-12 | 海能达通信股份有限公司 | Battery protecting device and protecting method |
| CN102496979A (en) * | 2011-11-28 | 2012-06-13 | 上海交通大学 | Lithium ion battery pack equalizing circuit with automatic polarity switch |
| JP5880105B2 (en) * | 2012-02-14 | 2016-03-08 | ミツミ電機株式会社 | Charging circuit |
| JP6804314B2 (en) * | 2017-01-23 | 2020-12-23 | 三菱電機株式会社 | Battery cutoff circuit |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5919336Y2 (en) * | 1979-03-09 | 1984-06-04 | 日立工機株式会社 | battery storage box |
| JPH0447257U (en) * | 1990-08-28 | 1992-04-22 | ||
| US5539610A (en) * | 1993-05-26 | 1996-07-23 | Siliconix Incorporated | Floating drive technique for reverse battery protection |
| JP3272108B2 (en) * | 1993-07-07 | 2002-04-08 | 三洋電機株式会社 | Battery pack |
| JP3584502B2 (en) * | 1994-10-07 | 2004-11-04 | ソニー株式会社 | Charge control device |
| JPH08140273A (en) * | 1994-11-08 | 1996-05-31 | Fujitsu Ltd | Load short-circuit protective circuit |
| JPH0917455A (en) * | 1995-06-28 | 1997-01-17 | Sony Corp | Battery pack control device and method |
| JPH0919071A (en) * | 1995-06-30 | 1997-01-17 | Mitsumi Electric Co Ltd | Overdischarge preventive device for rechargeable battery and battery pack using the device |
| JP4075018B2 (en) * | 1995-08-07 | 2008-04-16 | ソニー株式会社 | Battery pack |
| JP3574706B2 (en) * | 1995-12-28 | 2004-10-06 | 富士通株式会社 | Battery pack and battery protection device |
-
1996
- 1996-05-14 JP JP11887096A patent/JP3524675B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103904714A (en) * | 2012-12-28 | 2014-07-02 | 深圳市沃特玛电池有限公司 | High-current charge and discharge circuit of battery capacity grading cabinet |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09308114A (en) | 1997-11-28 |
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