JP2925241B2 - Rechargeable battery device - Google Patents
Rechargeable battery deviceInfo
- Publication number
- JP2925241B2 JP2925241B2 JP2135408A JP13540890A JP2925241B2 JP 2925241 B2 JP2925241 B2 JP 2925241B2 JP 2135408 A JP2135408 A JP 2135408A JP 13540890 A JP13540890 A JP 13540890A JP 2925241 B2 JP2925241 B2 JP 2925241B2
- Authority
- JP
- Japan
- Prior art keywords
- battery
- voltage
- battery device
- switch
- mos fet
- 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 - Lifetime
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
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は急速充電可能な充電式電池装置に関し、特に
過放電防止機能を有する電池装置に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rechargeable battery device capable of quick charging, and more particularly to a battery device having an overdischarge prevention function.
［発明の概要］ 本発明は、充電式電池装置において、電池の残容量が
所定値以下に少なくなったことを、該電池の電圧を検出
することによって検知し、放電回路を自動的に遮断する
機能を簡単な構成で、しかも非常に小さな電力損失で電
池装置自体で行い得るようにしたものである。[Summary of the Invention] In the present invention, in a rechargeable battery device, it is detected by detecting the voltage of the battery that the remaining capacity of the battery has decreased below a predetermined value, and the discharging circuit is automatically shut off. The function can be performed by the battery device itself with a simple configuration and with a very small power loss.
なお、本発明でいう電池とは、単一の電池のみらな
ず、複数の電池を互いに接続した組電池，過充電，短絡
等にかかわる安全装置，残容量表示等の機能が付加され
た電池および組電池をも包含する。The term “battery” used in the present invention refers to not only a single battery, but also a battery pack having a plurality of batteries connected to each other, a safety device for overcharging, short-circuiting, etc., and a battery having functions such as remaining capacity display. And a battery pack.
［従来の技術］ ポータブル機器の発達にともない、ラジオ，ラジオ付
きカセットテープレコーダ，ポータブルVTR,ポータブル
コンピュータ等の電子機器，携帯電話等の通信機器およ
びポータブル電動工具等の動力危機等の電源に、一次電
池および二次電池が広く使われるようになっている。特
に、近年二次電池の使用が著しく増加している。[Prior art] With the development of portable devices, primary power supplies such as power supplies for radio, cassette tape recorders with radios, portable VTRs, electronic devices such as portable computers, communication devices such as portable telephones, and power crises such as portable electric tools have been developed. Batteries and secondary batteries have been widely used. In particular, the use of secondary batteries has increased significantly in recent years.
［発明が解決しようとする課題］ 従来、充電式電池装置を機器に装着して使用する場合
には、しばしば、電池装置を機器に装着した状態で長期
間放置し、電池装置内の二次電池を完全に放電せしめる
場合があった。[Problems to be Solved by the Invention] Conventionally, when a rechargeable battery device is attached to a device and used, the secondary battery in the battery device is often left for a long time with the battery device attached to the device. Was completely discharged in some cases.
ところが、二次電池を完全に放電せしめた場合、多く
の二次電池では性能の劣化が著しく、繰り返し使用に耐
えない。しかも、多くの機器では、電池装置の過放電を
防止する機能を有しておらず、特に、様々な機器で使用
される脱着式の充電式電池装置では、機器に装着された
ままの状態で長期間放置され、電池装置内の電池部が過
放電に至ることを防止することができなかった。However, when the secondary battery is completely discharged, the performance of many secondary batteries is significantly deteriorated, and cannot be used repeatedly. Moreover, many devices do not have a function of preventing overdischarge of the battery device, and particularly, in the case of a detachable rechargeable battery device used in various devices, the battery device remains in the state of being attached to the device. It has not been possible to prevent the battery unit in the battery device from being overdischarged for a long time.
特に、非水系二次電池では、一旦過放電に至ると、そ
の後の充電で電池内部で短絡を引き起こし、性能の劣化
ばかりではなく、破裂に至るというような完全上重大な
トラブルを引き起こすことがあった。In particular, with non-aqueous secondary batteries, once overdischarge occurs, subsequent charging may cause a short circuit inside the battery, causing not only deterioration of performance but also complete serious trouble such as rupture. Was.
本発明の目的は以上のような問題を解消し、充電式電
池装置において、機器に装着した状態で放電した場合
に、当該充電式電池装置内の二次電池の過放電を防止
し、過放電による二次電池の性能の劣化を防止すること
にある。しかも、例えば脱着可能な充電式電池装置にお
いて、どのような機器で、どのような使用のされ方をし
た場合でも、当該電池装置内の二次電池の過放電を防止
することにある。An object of the present invention is to solve the above problems, and in a rechargeable battery device, when discharging in a state of being attached to a device, prevent overdischarge of a secondary battery in the rechargeable battery device, and overdischarge. To prevent the performance of the secondary battery from deteriorating. Moreover, for example, in a detachable rechargeable battery device, it is possible to prevent overdischarge of a secondary battery in the battery device, regardless of what kind of equipment and how it is used.
［課題を解決するための手段］ 上記目的を達成するため本発明は、充電可能な電池
と、内部に寄生ダイオードを有し、前記電池の充放電回
路に直列に挿入したスイッチ手段と、前記電池の両端電
圧を検知し、当該検知結果に基づく出力電圧によって前
記スイッチ手段のオン・オフを制御する電圧検知手段と
からなり、該電圧検知手段は、前記スイッチ手段をオン
する検知電圧が前記スイッチ手段をオフする検知電圧よ
りも高く、前記寄生ダイオードは前記電池の充電回路の
一部を構成することを特徴とする。Means for Solving the Problems In order to achieve the above object, the present invention provides a rechargeable battery, a switch having a parasitic diode therein and inserted in series in a charge / discharge circuit of the battery, and the battery And voltage control means for controlling on / off of the switch means by an output voltage based on the detection result. The voltage detection means includes a detection voltage for turning on the switch means. And the parasitic diode constitutes a part of a charging circuit of the battery.
なお、本発明でいうスイッチ手段としては、電力損失
が小さく、かつ遮断時のリーク電流が100μＡ以下であ
り、かつ、消費電力を小さくするために電圧駆動型のス
イッチであることが好ましい。この条件を満足するデバ
イスとして、電界効果型のトランジスタ（FET）が好ま
しい条件を備えているが、その中でもデバイスの内部に
寄生ダイオードを有するMOS FETを使用すると回路を著
しく簡略化および小型化できることを見出した。すなわ
ち、該MOS FETの内部の寄生ダイオードを電池の充電回
路の一部として使用することで、電池装置内の充電回路
を簡略化でき、しかも電池装置を従来の電池装置と同じ
ように２端子の部品として使用でき、該電池装置内の電
圧検知手段のコントロールのための第３端子等は必ずし
も必要としない。Note that the switch means in the present invention is preferably a voltage-driven switch that has a small power loss, a leakage current at the time of cutoff of 100 μA or less, and reduces power consumption. As a device satisfying this condition, a field-effect transistor (FET) has a favorable condition. Among them, the use of a MOS FET with a parasitic diode inside the device can significantly simplify and downsize the circuit. I found it. That is, by using the parasitic diode inside the MOS FET as a part of the battery charging circuit, the charging circuit in the battery device can be simplified, and the battery device has two terminals as in the conventional battery device. It can be used as a component, and the third terminal and the like for controlling the voltage detecting means in the battery device are not necessarily required.
そこで、放電回路の遮断スイッチとして使用するMOS
FETを検討した結果、MOS FETとしてはドレイン・ソース
間オン抵抗（RDS(on)）が小さいものほど好ましく、ド
レイン・ソース間オン抵抗（RDS(on)）は該電池装置内
の電池の内部抵抗と同程度、もしくはそれよりも小さい
ことが望ましいことが分かった。もちろん、MOS FETは
並列に使用しても差し支えなく、この場合は、MOS FET
のドレイン・ソース間オン抵抗（RDS(on)）の合成抵抗
値が該電池装置内の電池の内部抵抗と同程度、もしくは
それよりも小さいことが必要である。MOS FETのドレイ
ン・ソース間オン抵抗（RDS(on)）が電池装置内の電池
の内部抵抗に比べて大きい場合は、MOS FETによる電力
損失が大きくなるばかりではなく、その結果、電池装置
内の温度が著しく上昇するおそれがあり、好ましくな
い。Therefore, MOS used as a disconnection switch for the discharge circuit
Results of examining the FET, preferably as those drain-source on-resistance (R DS (on)) is small as MOS FET, the drain-source on-resistance (R DS (on)) is the battery within the battery unit It has been found that it is desirable that the resistance is equal to or smaller than the internal resistance. Of course, MOS FETs can be used in parallel.
It is necessary that the combined resistance value of the drain-source on-resistance (R DS (on) ) is equal to or smaller than the internal resistance of the battery in the battery device. If the drain-source on-resistance (R DS (on) ) of the MOS FET is larger than the internal resistance of the battery in the battery device, not only will the power loss due to the MOS FET increase, but also as a result, This is not preferred because the temperature of the resin may significantly increase.
なお、スイッチ手段としては、内部に寄生ダイオード
を有するデバイスであっても、内部に寄生ダイオードを
有するMOS FETと同じように寄生ダイオードを充電回路
の一部として使用することによってMOS FETと同様に電
池装置内の回路を簡略できる。Note that, even if a device has a parasitic diode inside, even if the device has a parasitic diode inside, the switch uses a parasitic diode as a part of the charging circuit in the same way as a MOS FET with a parasitic diode inside, so that the battery can be switched in the same way as the MOS FET. The circuit in the device can be simplified.
ところで、電圧検知手段として使用する電子回路は、
バイポーラIC,MOS IC,CMOS IC,Bi−MOS ICおよびハイブ
リッドIC等で構成することができるが、消費電流が小さ
いほうが好ましく、少なくとも、該電池装置内の二次電
池の自己放電電流よりも小さいことが必要不可欠であ
り、特にポータブル機器用の小型の電池装置としては、
100μＡよりも小さいことが望ましい。すなわち、消費
電流が100μＡを越えるような電圧検知手段を使用した
場合、ポータブル機器により用いられる1.0Ah程度の電
池装置では、過放電防止装置が作動し、外部放電電流が
遮断されたとしても、電圧検知手段の消費電流で電池装
置内の電池を数カ月で過放電に至らしめ、電池装置内の
電池の過放電を防止するという機能を満たすことができ
ない。By the way, the electronic circuit used as the voltage detection means
It can be composed of bipolar ICs, MOS ICs, CMOS ICs, Bi-MOS ICs, hybrid ICs, etc., but it is preferable that the consumption current is small, and at least smaller than the self-discharge current of the secondary battery in the battery device. Is indispensable, especially as a small battery device for portable equipment.
Desirably less than 100 μA. In other words, when a voltage detecting means that consumes more than 100 μA is used, in a battery device of about 1.0 Ah used by a portable device, even if the overdischarge prevention device operates and the external discharge current is cut off, the voltage is not changed. The function of preventing over-discharge of the battery in the battery device cannot be achieved by causing the battery in the battery device to be over-discharged in several months by the consumption current of the detection means.
さらに、電圧検知手段は検出電圧（Voff）｛すなわち
スイッチ手段をオフする検知電圧｝よりも高いリセット
電圧（Von）｛すなわちスイッチ手段をオンする検知電
圧｝を有することが必要であり、ヒステリシスの大きさ
（Von−Voff）は0.05V〜5.0V程度あることが好ましい。
0.05Vよりも小さなヒステリシスでは、放電電流の遮断
による電池両端電圧の回復によって再びリセット電圧を
越えてしまう。その結果、スイッチ手段がオンして電池
装置は断続的に放電を行うので、ヒステリシスが小さす
ぎるのは好ましくない。一方、ヒステリシスが5.0Vより
も大きい場合は、電池装置が放電遮断状態から充電に入
った場合、電池装置内の電池の電圧がリセット電圧（V
on）を越えず、電圧検知手段がリセットされないので、
スイッチ手段がオフ状態のまま、充電電流はスイッチ手
段の寄生ダイオードのみを流れるのでスイッチ手段での
電力損失が大きい状態が続く。すなわち、ヒステリシス
が大きすぎるのは好ましくなく、充電開始による電池電
圧の上昇によって、ただちに電圧検知手段がリセットさ
れる程度のヒステリシスの大きさでなければならない。
したがって、ヒステリシスの大きさは0.05V〜5.0V程度
であることが好ましい。Further, the voltage detecting means needs to have a reset voltage (V on ) higher than the detecting voltage (V off ), ie, a detecting voltage for turning off the switch means, ie, a detecting voltage for turning on the switch means, and the hysteresis is required. (V on −V off ) is preferably about 0.05 V to 5.0 V.
If the hysteresis is smaller than 0.05 V, the reset voltage will be exceeded again due to the recovery of the voltage across the battery due to the interruption of the discharge current. As a result, the switch device is turned on and the battery device discharges intermittently, so that it is not preferable that the hysteresis is too small. On the other hand, when the hysteresis is larger than 5.0 V, the voltage of the battery in the battery device becomes the reset voltage (V
on ), and the voltage detection means is not reset.
Since the charging current flows only through the parasitic diode of the switching means while the switching means is in the OFF state, a state in which the power loss in the switching means is large continues. That is, it is not preferable that the hysteresis is too large, and the hysteresis should be such that the voltage detecting means is immediately reset by the rise of the battery voltage due to the start of charging.
Therefore, the magnitude of the hysteresis is preferably about 0.05 V to 5.0 V.
［作用］ 本発明によれば、非常に簡単な構成で、通常の二次電
池と全く同じように使用でき、しかも正常な放電条件を
越えて電池が過放電される以前に電池装置の放電回路を
遮断し、電池装置内の電池を過放電から保護する。これ
によって、過放電による特性の劣化のない充電式電池装
置を提供することができる。According to the present invention, the discharge circuit of the battery device can be used with a very simple configuration in the same manner as a normal secondary battery and before the battery is overdischarged beyond normal discharge conditions. To protect the battery in the battery device from overdischarge. This makes it possible to provide a rechargeable battery device in which characteristics do not deteriorate due to overdischarge.
［実施例］ 以下、本発明による過放電防止機能を具備した電池装
置の実施例を図面により説明する。Embodiment Hereinafter, an embodiment of a battery device having an overdischarge prevention function according to the present invention will be described with reference to the drawings.
第１図は本発明のブロック図を示す。第１図に示すよ
うに、負荷もしくは充電器１は、電池装置２に接続され
る。電池装置２は、電池３、スイッチ手段４および電圧
検知手段５から構成される。FIG. 1 shows a block diagram of the present invention. As shown in FIG. 1, a load or a charger 1 is connected to a battery device 2. The battery device 2 includes a battery 3, switch means 4, and voltage detection means 5.
ついで、第２図に過放電防止機能を具備した電池装置
の具体例を示す。第２図に示すようにスイッチ手段とし
て、内部寄生ダイオード41Aを有するMOS FET41を用い
る。電池３は単電池もしくは直列または並列に接続され
た組電池からなる。電圧検知手段５は、コンパレータと
基準電圧回路等から構成することが可能であり、第２図
に示す回路図のように電源入力と信号入力を兼ねる反転
入力端（V-）を電池３の負極端子に、非反転入力端
（V+）を電池３の正極端子に接続する。電圧検知手段５
の出力端子はMOS FET41のゲートに接続し、電池３の負
極はMOS FET41のソースに接続し、MOS FET41のドレイン
は電池装置２の負極端子７に接続し、電池３の正極は電
池装置２の正極端子６に接続する。電圧検知手段５の出
力パターンの例を第３図に示す。第３図の（ａ）および
（ｂ）に示すように、電圧検知手段５のon時の出力電圧
（Vout(on)）は、MOS FET41のゲートカットオフ電圧（V
GS(off)）よりも高く、しかも電圧検知手段５のoff時の
出力電圧（Vout(off)）は、該MOS FET41のゲートカット
オフ電圧（VGS(off)）よりも低いことが必要であるが、
電圧検知手段５のon時の出力電圧（Vout(on)）は第３図
の（ａ）または（ｂ）どちらの出力形式であっても差し
支えない。Next, FIG. 2 shows a specific example of a battery device having an overdischarge prevention function. As shown in FIG. 2, a MOS FET 41 having an internal parasitic diode 41A is used as a switch. The battery 3 is composed of a single battery or an assembled battery connected in series or in parallel. The voltage detecting means 5 can be composed of a comparator, a reference voltage circuit, and the like. As shown in the circuit diagram of FIG. 2, the inverting input terminal (V − ) that serves both as a power supply input and a signal input is connected to the negative electrode of the battery 3. Terminal, and the non-inverting input terminal (V + ) is connected to the positive terminal of the battery 3. Voltage detection means 5
Is connected to the gate of the MOS FET 41, the negative electrode of the battery 3 is connected to the source of the MOS FET 41, the drain of the MOS FET 41 is connected to the negative terminal 7 of the battery device 2, and the positive electrode of the battery 3 is Connect to positive electrode terminal 6. FIG. 3 shows an example of the output pattern of the voltage detecting means 5. As shown in (a) and (b) of FIG. 3, the output voltage (V out (on) ) of the voltage detecting means 5 when it is on is equal to the gate cutoff voltage (V
GS (off) ), and the output voltage (V out (off) ) of the voltage detecting means 5 when the voltage detector 5 is off needs to be lower than the gate cutoff voltage (V GS (off) ) of the MOS FET 41. In Although,
The output voltage (V out (on) ) of the voltage detection means 5 when it is on may be either the output form (a) or (b) in FIG.
以上の構成によれば、電池３の両端電圧がある一定の
電圧（第３図Voff）以下になると、電圧検知手段５の出
力電圧がオン状態（第３図VGS(off)以上）からオフ状態
（第３図VGS(off)以下）になり、MOS FET41が導通状態
から遮断状態になり、電池３の放電回路を遮断する。さ
らに、寄生ダイオード41Aを介した充電によって電池３
の両端電圧が前記Voffよりも高い電圧（第３図Von）以
上になると、電圧検知手段５の出力電圧がオン状態から
オン状態になり、MOS FET41が遮断状態から導通状態と
なり、通常の（低損失の）充電が行われる。According to the above configuration, when the voltage across the battery 3 falls below a certain voltage (V off in FIG. 3), the output voltage of the voltage detecting means 5 changes from the on state (V GS (off) or more in FIG. 3). The state is turned off (below VGS (off) in FIG. 3), the MOS FET 41 is turned off from the conductive state, and the discharging circuit of the battery 3 is cut off. Further, the battery 3 is charged by charging through the parasitic diode 41A.
The voltage between both ends is a higher voltage (FIG. 3 V on) more than the V off, the output voltage of the voltage detection means 5 is from the on state to the ON state, becomes conductive MOS FET 41 from the cutoff state, normal A (low-loss) charge is performed.
なお、第２図および第３図に示したスイッチ手段の位
置と電圧検出手段の出力パターンは、Ｎ−チャンネル型
のMOS FETに対応するものであって、他のスイッチ手段
を用いる場合には、該スイッチ手段の特性に応じた配置
と電圧検出手段の出力パターンを選ぶ必要がある。The position of the switch means and the output pattern of the voltage detection means shown in FIGS. 2 and 3 correspond to an N-channel type MOS FET, and when other switch means is used, It is necessary to select an arrangement according to the characteristics of the switch means and an output pattern of the voltage detection means.
第４図に本発明の他の実施例として、さらにフュー
ズ，ツェナーダイオードなどの他の素子を組み込んだ例
を示す。FIG. 4 shows another embodiment of the present invention in which other elements such as a fuse and a zener diode are further incorporated.
第４図に示すように電池装置２の正極端子6,負極端子
７間には、温度フューズ11,第１の二次電池8a,第１の感
温スイッチ9a,温度または電流フューズ12,第２の二次電
池8b,第２の感温スイッチ9bおよび内部に寄生ダイオー
ド13Aを有するスイッチ手段としてのMOS FET（ソース・
ドレイン）13からなる直列回路が接続され、ツェナーダ
イオード10のアノードが第１の二次電池8aの正極側にカ
ソードが負極端子に各々接続され、電圧検知手段として
の電圧検出IC14の反転入力端がダイオード15を介してMO
S FET13のソース側に、非反転入力端が正極端子６に各
々接続され、出力端が抵抗16を介してMOS FET13のゲー
トに接続されている。このような構成においても、その
基本的動作は第２図の装置と同様である。As shown in FIG. 4, between the positive terminal 6 and the negative terminal 7 of the battery device 2, a temperature fuse 11, a first secondary battery 8a, a first temperature sensitive switch 9a, a temperature or current fuse 12, a second MOS FET (source / source) as switch means having a secondary battery 8b, a second temperature-sensitive switch 9b, and a parasitic diode 13A inside.
A series circuit including a drain 13 is connected, the anode of the Zener diode 10 is connected to the positive electrode side of the first secondary battery 8a, the cathode is connected to the negative electrode terminal, and the inverting input terminal of the voltage detection IC 14 as voltage detection means is connected to MO through diode 15
A non-inverting input terminal is connected to the positive terminal 6 on the source side of the SFET 13, and an output terminal is connected to the gate of the MOS FET 13 via the resistor 16. In such a configuration, the basic operation is the same as that of the apparatus shown in FIG.
なお、二次電池8a,8b（以下８）として特開昭62−90,
863号に記載の二次電池を使用した場合について具体的
に説明する。該二次電池８の標準的な動作電圧範囲は、
１セルあたり2.75V〜4.2Vであり、第４図のように該二
次電池８を２個直列に組み合わせた場合は、5.5V〜8.4V
になる。本実施例ではビデオムービーの電源用として2.
0Ahの容量を有する電池装置を試作した。試作した電池
装置は90mm×46mm×26mmの大きさを有し、0.15Ω〜0.30
Ωの内部抵抗を持つ。なお、該二次電池８の単セルの内
部抵抗は0.02Ω〜0.08Ωであり、25℃での自己放電電流
は200μＡ程度以上ある。ところで、該二次電池８は単
セル電圧が約0.5V以下になると、通常のサイクル劣化よ
り大きな性能の低下を引き起こす。したがって、第４図
のように２個を直列に組み合わせた場合は、電池装置の
電圧が少なくとも1V以下にならないように電圧を保持す
る必要性がある。Incidentally, as secondary batteries 8a and 8b (hereinafter referred to as 8), see JP-A-62-90,
The case where the secondary battery described in No. 863 is used will be specifically described. The standard operating voltage range of the secondary battery 8 is:
It is 2.75 V to 4.2 V per cell, and 5.5 V to 8.4 V when two rechargeable batteries 8 are combined in series as shown in FIG.
become. In this embodiment, it is used as a power source for a video movie.
A battery device having a capacity of 0 Ah was prototyped. The prototype battery device has a size of 90 mm × 46 mm × 26 mm, and 0.15 Ω ~ 0.30
Has an internal resistance of Ω. The internal resistance of the single cell of the secondary battery 8 is 0.02 Ω to 0.08 Ω, and the self-discharge current at 25 ° C. is about 200 μA or more. By the way, when the single cell voltage becomes about 0.5 V or less, the performance of the secondary battery 8 deteriorates more than normal cycle deterioration. Therefore, when two batteries are combined in series as shown in FIG. 4, it is necessary to maintain the voltage so that the voltage of the battery device does not become at least 1 V or less.
ところで、例えばMOS FET13として、2SK1286（NEC）,
2SK1136（三菱）,2SK1137（三菱）,2SK1114（東芝）等
を使用すれば、MOS FETのドレイン・ソース間オン抵抗
（RDS(on)）は、0.04Ω〜0.12Ωにすることができる。
もちろん、より定格の大きなMOS FETを使用すれば、さ
らにMOS FETのドレイン・ソース間オン抵抗（RDS(on)）
を小さくすることが可能である。By the way, for example, as MOS FET13, 2SK1286 (NEC),
If 2SK1136 (Mitsubishi), 2SK1137 (Mitsubishi), 2SK1114 (Toshiba), or the like is used, the drain-source on-resistance (R DS (on) ) of the MOS FET can be made 0.04Ω to 0.12Ω.
Of course, if a higher rated MOS FET is used, the drain-source ON resistance of the MOS FET (R DS (on) )
Can be reduced.
また、電圧検出I.C.14として、Ｓ−805ALY（セイコー
電子）を、ダイオード15としては一般的な整流用のダイ
オードを使用し、抵抗16は100kΩに設定した。このよう
な電圧検知回路では、放電遮断電圧（Voff）を5.20V〜
5.50V程度に設定することができる。電圧検出I.C.14の
平均消費電流は4.0μＡ以下であり、電池装置を外部で
短絡した場合、MOS FET13の遮断状態時の電池装置の外
部回路にリークする電流（IDSS）は1.0μＡ以下であ
る。さらに、この電池装置の最大充放電電流は2.0Aであ
り、5.5V〜8.4Vの範囲の動作電圧域では、単に、該二次
電池８を２個直列に接続した場合と全く同じように使用
することが可能であり、該MOS FET13における電力損失
は、該電池装置の電力容量の３％以下程度に抑えること
ができる。また、該電池装置が機器に装着された状態で
放置され、該MOS FET13が遮断状態になった場合でも、
該二次電池８を２個直列に接続した場合と全く同じよう
に充電を行うことができる。S-805ALY (Seiko Electronics) was used as the voltage detection IC 14, a general rectification diode was used as the diode 15, and the resistor 16 was set to 100 kΩ. In such a voltage detection circuit, the discharge cut-off voltage (V off ) is set to 5.20 V to
It can be set to about 5.50V. The average current consumption of the voltage detection IC 14 is 4.0 μA or less, and when the battery device is short-circuited externally, the current (I DSS ) leaking to the external circuit of the battery device when the MOS FET 13 is cut off is 1.0 μA or less. Further, the maximum charging / discharging current of this battery device is 2.0 A, and in an operating voltage range of 5.5 V to 8.4 V, the battery device is used in exactly the same manner as when two secondary batteries 8 are connected in series. The power loss in the MOS FET 13 can be suppressed to about 3% or less of the power capacity of the battery device. Also, even when the battery device is left attached to the device and the MOS FET 13 is turned off,
Charging can be performed in exactly the same way as when two secondary batteries 8 are connected in series.
そこで、本発明電池装置の外部端子6,7間に５Ωの抵
抗器を１週間接続し、電池装置を放電させ、前後の容量
を比較するというテストの方法で過放電に対する効果の
評価を行った。その結果、従来、該二次電池８を単に２
個直列に接続しただけの場合には、５％〜80％の容量低
下が認められていたが、試作した本発明電池装置では全
く容量の低下はなかった。また、ビデオムービーを本発
明電池装置を放電させた後に、１ヶ月間ビデオムービー
に装着したままの状態で放置した場合にも、従来、該二
次電池８を単に２個直列に接続しただけの場合には、２
％〜50％の容量低下が認められていたが、試作した本発
明電池装置では全く容量の低下は認められなかった。Therefore, the effect on overdischarge was evaluated by a test method in which a 5Ω resistor was connected between the external terminals 6 and 7 of the battery device of the present invention for one week, the battery device was discharged, and the capacities before and after were compared. . As a result, conventionally, the secondary battery 8 is simply
When only the individual batteries were connected in series, a capacity reduction of 5% to 80% was recognized, but the capacity of the prototype battery device of the present invention did not decrease at all. Also, in the case where the video movie is discharged from the battery device of the present invention and left for one month while being attached to the video movie, conventionally, only the two secondary batteries 8 are connected in series. In case 2
% To 50%, but no reduction in capacity was observed in the prototype battery device of the present invention.
［発明の効果］ 以上詳述した如く、本発明によれば、いかなる機器で
使用され、機器に長期間装着された状態で放置されて
も、二次電池の過放電を防止し、特性の劣化が小さく、
安全で、しかも通常の二次電池と全く同じように使用で
きる充電式電池装置を提供できる。[Effects of the Invention] As described above in detail, according to the present invention, even when used in any device and left in a state of being attached to the device for a long period of time, the secondary battery is prevented from being over-discharged and the characteristics are deteriorated. Is small,
A rechargeable battery device that is safe and can be used in exactly the same manner as a normal secondary battery can be provided.
第１図は本発明のブロック図、 第２図は本発明の実施例の回路図、 第３図（ａ），（ｂ）は電圧検知回路の出力パターン例
を示す図、 第４図は本発明の他の実施例の回路図である。 ３……電池、４……スイッチ手段、５……電圧検知手
段。FIG. 1 is a block diagram of the present invention, FIG. 2 is a circuit diagram of an embodiment of the present invention, FIGS. 3 (a) and 3 (b) show examples of output patterns of a voltage detection circuit, and FIG. FIG. 6 is a circuit diagram of another embodiment of the present invention. 3 ... battery, 4 ... switch means, 5 ... voltage detection means.
Claims (3)
を有し、前記電池の充放電回路に直列に挿入したスイッ
チ手段と、前記電池の両端電圧を検知し、当該検知結果
に基づく出力電圧によって前記スイッチ手段のオン・オ
フを制御する電圧検知手段とからなり、該電圧検知手段
は、前記スイッチ手段をオンする検知電圧が前記スイッ
チ手段をオフする検知電圧よりも高く、前記寄生ダイオ
ードは前記電池の充電回路の一部を構成することを特徴
とする充電式電池装置。1. A rechargeable battery, a switch having a parasitic diode therein and inserted in series in a charge / discharge circuit of the battery, and an output voltage based on a detection result of detecting a voltage between both ends of the battery. And a voltage detecting means for controlling on / off of the switch means.The voltage detecting means is such that a detection voltage for turning on the switch means is higher than a detection voltage for turning off the switch means, and the parasitic diode is A rechargeable battery device comprising a part of a battery charging circuit.
界効果型トランジスタであって、ソース・ドレイン間オ
ン抵抗値が前記電池の内部抵抗値と同程度もしくはそれ
よりも小さいことを特徴とする充電式電池装置。2. The charging device according to claim 1, wherein said switch means is a field-effect transistor, and an on-resistance value between a source and a drain is equal to or smaller than an internal resistance value of said battery. Type battery device.
知手段は、消費電流値が100μＡ以下であることを特徴
とする充電式電池装置。3. The rechargeable battery device according to claim 1, wherein said voltage detecting means has a current consumption value of 100 μA or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2135408A JP2925241B2 (en) | 1990-05-28 | 1990-05-28 | Rechargeable battery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2135408A JP2925241B2 (en) | 1990-05-28 | 1990-05-28 | Rechargeable battery device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0433271A JPH0433271A (en) | 1992-02-04 |
| JP2925241B2 true JP2925241B2 (en) | 1999-07-28 |
Family
ID=15151031
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2135408A Expired - Lifetime JP2925241B2 (en) | 1990-05-28 | 1990-05-28 | Rechargeable battery device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2925241B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015521927A (en) * | 2012-09-24 | 2015-08-03 | コーニンクレッカ フィリップス エヌ ヴェ | Milking system with actuator |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3219524B2 (en) * | 1993-01-19 | 2001-10-15 | 三洋電機株式会社 | Overdischarge protection circuit for secondary battery |
| JP3222999B2 (en) * | 1993-08-20 | 2001-10-29 | 三洋電機株式会社 | Overdischarge prevention circuit for secondary battery |
| US5789900A (en) * | 1994-12-05 | 1998-08-04 | Fuji Photo Film Co., Ltd. | Device for protecting a secondary battery from overcharge and overdischarge |
| JP2861879B2 (en) * | 1995-08-25 | 1999-02-24 | 日本電気株式会社 | Battery pack |
| JP3439035B2 (en) * | 1996-07-30 | 2003-08-25 | 三洋電機株式会社 | Battery pack to prevent battery over-discharge |
| US6222346B1 (en) | 1999-08-18 | 2001-04-24 | Matsushita Electric Industrial Co., Ltd. | Battery protection device |
| JP3725105B2 (en) | 2002-08-30 | 2005-12-07 | 株式会社東芝 | Overdischarge prevention circuit for secondary battery and overdischarge prevention method for secondary battery |
| DE102004030037B4 (en) * | 2003-11-19 | 2012-01-12 | Milwaukee Electric Tool Corp. | accumulator |
| KR101687212B1 (en) * | 2009-06-10 | 2016-12-16 | 케이2 에너지 솔루션스, 인코포레이티드 | System for preventing deep battery discharge |
-
1990
- 1990-05-28 JP JP2135408A patent/JP2925241B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015521927A (en) * | 2012-09-24 | 2015-08-03 | コーニンクレッカ フィリップス エヌ ヴェ | Milking system with actuator |
| US9814811B2 (en) | 2012-09-24 | 2017-11-14 | Koninklijke Philips N.V. | Breast pump system with actuator |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0433271A (en) | 1992-02-04 |
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