JPH08236161A - Protection circuit for battery device - Google Patents
Protection circuit for battery deviceInfo
- Publication number
- JPH08236161A JPH08236161A JP7067011A JP6701195A JPH08236161A JP H08236161 A JPH08236161 A JP H08236161A JP 7067011 A JP7067011 A JP 7067011A JP 6701195 A JP6701195 A JP 6701195A JP H08236161 A JPH08236161 A JP H08236161A
- Authority
- JP
- Japan
- Prior art keywords
- battery
- terminal
- terminals
- current
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は携帯機器（携帯電話機や
ビデオ等）の電源として利用する電池装置の端子を通し
て流れる電流が短絡や過負荷等により過大になった場
合、該過大電流から電池を保護する電池装置の保護回路
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, when the current flowing through the terminals of a battery device used as a power source for a portable device (mobile phone, video, etc.) becomes excessive due to a short circuit, an overload, or the like, removes the battery from the excessive current. The present invention relates to a protection circuit of a battery device for protection.
【０００２】[0002]
【従来技術】従来、この種の技術として特開平６−９６
７５８号公報に開示されたものがある。図２は従来の電
池パックの電源端子短絡防止回路の例を示す図である。
電池パック４は携帯機器の電源として使用されるもの
で、図示するように、従来の電池パック４はスイッチ４
−１、端子４−２、端子４−３及び、電池４−４から構
成され、使用機器（省略）に装着する際に端子４−２及
び端子４−３が使用機器側の端子に接触すると同時にス
イッチ４−１が機構的に押されて作動するように取り付
けられている。2. Description of the Related Art Conventionally, as a technique of this kind, Japanese Patent Laid-Open No. 6-96.
There is one disclosed in Japanese Patent No. 758. FIG. 2 is a diagram showing an example of a power supply terminal short circuit prevention circuit of a conventional battery pack.
The battery pack 4 is used as a power source for a mobile device, and as shown in the figure, the conventional battery pack 4 has a switch 4
−1, a terminal 4-2, a terminal 4-3, and a battery 4-4, and when the terminal 4-2 and the terminal 4-3 come into contact with the terminal on the used device side when mounted on the used device (omitted) At the same time, the switch 4-1 is mounted so as to be mechanically pushed and operated.
【０００３】電池パック４は携帯機器に装着されたとき
は端子４−２及び、端子４−３は電源端子として使用さ
れ、充電器に装着されたときは端子４−２及び、端子４
−３は充電端子として使用される。例えば、充電時は充
電器に装着する際スイッチ４−１が作動し、端子４−
２、端子４−３より電池４−４に充電電流を流し充電を
行う。When the battery pack 4 is attached to a portable device, the terminal 4-2 and the terminal 4-3 are used as power supply terminals, and when attached to the charger, the terminal 4-2 and the terminal 4 are used.
-3 is used as a charging terminal. For example, at the time of charging, the switch 4-1 is activated when the battery is attached to the charger, and the terminal 4-
2. A charging current is supplied from the terminal 4-3 to the battery 4-4 for charging.
【０００４】電池パック４が使用されていないときはス
イッチ４−１は開状態なので端子４−２と端子４−３間
に導体が接触しても電池４−４は短絡することは無く保
護される。Since the switch 4-1 is in the open state when the battery pack 4 is not used, the battery 4-4 is protected without being short-circuited even if a conductor comes into contact with the terminals 4-2 and 4-3. It
【０００５】この他に電池の短絡防止策としては、前記
スイッチ４−１の代わりに磁気で作動するリ−ドリレ−
を使用し、使用機器の側に磁石を取付け電池パックを装
着時にリ−ドリレ−を作動させる方法、又、短絡時は短
絡電流による発熱で温度が上昇することを応用し、前記
スイッチ４−１の代わりにヒュ−ズまたは、温度上昇に
対して急激に抵抗値が増すポリスイッチ（ＰＴＣ）を使
用し短絡電流を制限する方法、又、充電専用の充電端子
を設け、該充電端子と電池の間にダイオ−ドを設け、充
電時は該ダイオ−ドを通して電池を充電し、該充電端子
間の短絡に対しては該ダイオ−ドで短絡電流を阻止する
方法、又、不使用中は端子４−２及び端子４−３に絶縁
体で目かくしをして端子間に導体が直接触れなくする方
法等が提案されている。In addition to this, as a measure for preventing a battery short circuit, a magnetically operated lead-relay relay is used instead of the switch 4-1.
By applying a magnet to the side of the equipment to be used and activating the lead reel when the battery pack is mounted, and applying the fact that the temperature rises due to the heat generated by the short-circuit current when a short circuit occurs. In place of the fuse, or a method of limiting the short-circuit current by using a poly switch (PTC) whose resistance value increases rapidly with temperature rise, or by providing a charging terminal exclusively for charging and charging the charging terminal and the battery A diode is provided between the two terminals, a battery is charged through the diode during charging, and a short-circuit current is blocked by the diode when a short circuit occurs between the charging terminals. There has been proposed a method in which the conductors 4-2 and the terminals 4-3 are covered with an insulator so that the conductors do not directly touch the terminals.
【０００６】[0006]
【発明が解決しようとする課題】しかしながら、上記の
機構的に作動するスイッチ４−１を取り付ける方法は機
構の調整が必要で繰返し使用すると信頼性に問題があ
り、磁気で動作するリ−ドリレ−を使用する方法は磁気
ネックレス等の磁気製品の接近または接触による誤動作
や鉄粉の付着という問題があり、また、ヒュ−ズを使用
する方法は溶断した際に取替えが煩雑であり、ポリスイ
ッチを使用する方法は不完全ショ−ト状態に対する対策
が難しい。However, the above-mentioned method of mounting the mechanically operated switch 4-1 requires adjustment of the mechanism and has a problem in reliability when repeatedly used, and the magnetically operated lead reel relay is used. There is a problem of malfunction due to the approach or contact of magnetic products such as magnetic necklaces and adhesion of iron powder, and the method of using fuses is complicated to replace when melting and the poly switch is used. As for the method used, it is difficult to take measures against incomplete short-circuit conditions.
【０００７】また、ダイオ−ドを使用する方法は順方向
の電圧降下が温度変化により不安定で、充電時、精密な
電圧制御を行うことが難しい。また、不使用中は端子を
絶縁体で目かくしして端子間に導体が直接触れなくする
方法を自動的に行うには機構的に難しいと云う問題があ
った。Further, in the method using a diode, the forward voltage drop is unstable due to temperature change, and it is difficult to perform precise voltage control during charging. In addition, there is a problem that it is mechanically difficult to automatically perform a method in which the terminals are covered with an insulator so that the conductors do not directly touch each other during nonuse.
【０００８】その他に、前記スイッチ４−１の代わりに
電気信号で駆動するスイッチを使用し、電池パック４に
端子４−２、端子４−３の他に前記スイッチを駆動する
端子を設け、前記電池パックが充電器に装着され該端子
に電圧が印加されたときのみ前記スイッチを作動させる
方法も考えられるが、スイッチを駆動する端子を設ける
必要があり電池パックと充電器間の端子数が増え機械的
制約も増え高価となる。In addition, instead of the switch 4-1, a switch driven by an electric signal is used, the battery pack 4 is provided with terminals 4-2 and 4-3, and terminals for driving the switch. A method of operating the switch only when the battery pack is attached to the charger and a voltage is applied to the terminal can be considered, but it is necessary to provide a terminal for driving the switch, and the number of terminals between the battery pack and the charger is increased. Mechanical restrictions increase and it becomes expensive.
【０００９】本発明は上述の点に鑑みてなされたもの
で、上記問題点を除去し、簡単な構成で確実に電池を過
大電流から保護できる電池装置の保護回路を提供するこ
とを目的とする。The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a protection circuit for a battery device that eliminates the above-mentioned problems and can reliably protect a battery from an overcurrent with a simple structure. .
【００１０】[0010]
【課題を解決するための手段】上記課題を解決するため
本発明は電池及び端子を具備し、充電時は充電器より充
電電流を端子を通して電池に供給すると共に、電源とし
て使用する際は、該電池から端子を通して機器に電流を
供給する電池装置において、電池と端子間に直列に電子
スイッチと、端子を通して流れる電流に大きい変動があ
った場合、該過渡的な電流変動を電圧に変換し、該変換
した電圧により電子スイッチを開くと共に、該電子スイ
ッチの開状態を維持する制御手段を設けたことを特徴と
する。In order to solve the above problems, the present invention comprises a battery and a terminal. When charging, the charging current is supplied from the charger to the battery through the terminal, and when used as a power source, In a battery device that supplies a current from a battery to a device through a terminal, if there is a large fluctuation in a current flowing through the terminal and an electronic switch in series between the battery and the terminal, the transient current fluctuation is converted into a voltage, The electronic switch is opened by the converted voltage, and a control means for maintaining the open state of the electronic switch is provided.
【００１１】[0011]
【作用】本発明は上記構成を採用することにより、電池
装置の端子間を通して流れる電流に大きい変動があった
場合、制御手段は該過渡的な電流変動を電圧に変換し、
該変換した電圧により前記電子スイッチを開くと共に、
該電子スイッチの開状態を維持するので、電池装置の端
子間が短絡した場合、又は、該端子を通して流れる負荷
電流が過負荷等により異常に急増した場合、電子スイッ
チにより該過大電流は遮断され、電池は保護される。According to the present invention, by adopting the above configuration, when there is a large fluctuation in the current flowing between the terminals of the battery device, the control means converts the transient current fluctuation into a voltage,
While opening the electronic switch by the converted voltage,
Since the open state of the electronic switch is maintained, when the terminals of the battery device are short-circuited, or when the load current flowing through the terminals abnormally increases due to overload or the like, the overcurrent is shut off by the electronic switch, The battery is protected.
【００１２】また、電池装置の保護回路と充電器（又は
使用機器）の間は２個の端子（＋端子と−端子）で済
み、回路構成が簡単で且つ機械的動作がないので機構的
な制約も少なく、簡単に保護回路が構成でき信頼性も高
くなる。Further, only two terminals (+ terminal and-terminal) are required between the protection circuit of the battery device and the charger (or the equipment used), and the circuit configuration is simple and there is no mechanical operation, so it is mechanical. There are few restrictions, and a protection circuit can be configured easily and reliability is improved.
【００１３】[0013]
【実施例】以下、本発明の一実施例を図面に基づいて詳
細に説明する。図１は本発明の電池装置の保護回路の例
を示す図である。図示するように、本発明の電池装置の
保護回路はコイル１、抵抗器２、ＦＥＴ（電界効果トラ
ンジスタ）３、抵抗器４、トランジスタ５、抵抗器６、
電池７、端子Ｔ1、Ｔ2を具備する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a diagram showing an example of a protection circuit of a battery device of the present invention. As shown in the figure, the protection circuit of the battery device of the present invention includes a coil 1, a resistor 2, a FET (field effect transistor) 3, a resistor 4, a transistor 5, a resistor 6,
A battery 7 and terminals T 1 and T 2 are provided.
【００１４】端子Ｔ1は電池７の＋側へ接続され、端子
Ｔ2はコイル１を通してＦＥＴ３のドレンＤへ接続さ
れ、ＦＥＴ３のソ−スＳは電池７の−側へ接続されてい
る。また、トランジスタ５のコレクタｃはＦＥＴ３のゲ
−トＧへ接続されると共に、抵抗器２を介して端子Ｔ1
（電池７の＋側）接続され、エミッタｅはＦＥＴ３のソ
−スＳ（電池７の−側）へ接続され、ベ−スｂは抵抗器
６を介してＦＥＴ３のソ−スＳ（電池７の−側）へ接続
されると共に、抵抗器４を介して端子Ｔ2に接続されて
いる。The terminal T 1 is connected to the positive side of the battery 7, the terminal T 2 is connected to the drain D of the FET 3 through the coil 1, and the source S of the FET 3 is connected to the negative side of the battery 7. The collector c of the transistor 5 is connected to the gate G of the FET 3 and the terminal T 1 is connected via the resistor 2.
(The positive side of the battery 7), the emitter e is connected to the source S of the FET 3 (the negative side of the battery 7), and the base b is connected through the resistor 6 to the source S of the FET 3 (the negative side of the battery 7). (-Side of) and is also connected to the terminal T 2 via the resistor 4.
【００１５】以下、本実施例の動作を説明する。充電
時、端子Ｔ1、Ｔ2は充電器（図では省略）へ接続され充
電電圧が供給される。トランジスタ５のベ−スｂには−
側の電圧が印加され、ベ−ス電流が流れないのでトラン
ジスタ５は開状態にある。ＦＥＴ３のゲ−トＧには抵抗
器２を介して＋電圧が印加される。従って、ＦＥＴ３の
ドレンＤとソ−スＳ間は閉状態となり、充電器（図では
省略）からの充電電流ｉは矢印の方向へ流れ、電池７を
充電する。The operation of this embodiment will be described below. At the time of charging, the terminals T 1 and T 2 are connected to a charger (not shown) to supply a charging voltage. For the base b of the transistor 5,
Since the side voltage is applied and the base current does not flow, the transistor 5 is in the open state. A + voltage is applied to the gate G of the FET 3 via the resistor 2. Therefore, the drain D of the FET 3 and the source S are closed, and the charging current i from the charger (not shown) flows in the direction of the arrow to charge the battery 7.
【００１６】電池７を使用するとき、端子Ｔ1、Ｔ2は使
用機器（図では省略）に接続され、電池７から端子
Ｔ1、Ｔ2を介して使用機器へ負荷電流（充電電流ｉと逆
向き）を供給する。この時のトランジスタ５及び、ＦＥ
Ｔ３の動作は上述した通りなので説明は省略する。When the battery 7 is used, the terminals T 1 and T 2 are connected to a device to be used (not shown), and the load current (charge current i and charge current i from the battery 7 to the device to be used is supplied via the terminals T 1 and T 2 ). Reverse direction). Transistor 5 and FE at this time
Since the operation of T3 is as described above, the description is omitted.
【００１７】端子Ｔ1、Ｔ2が短絡した場合、電池７より
端子Ｔ1、Ｔ2を通して短絡電流Ｉｓが矢印の向きに流れ
る。この短絡初期は、コイル１の両端に電圧が発生す
る。この電圧（＋電位）が抵抗器４を介してトランジス
タ５のベ−スｂに印加され、ベ−ス電流が流れるのでト
ランジスタ５のコレクタｃとエミッタｅ間は閉状態とな
る。これにより、ＦＥＴ３のゲ−トＧ電圧は電池７の−
側電圧となり、ドレンＤとソ−スＳ間は開状態となり短
絡電流Ｉｓは遮断される。When the terminals T 1 and T 2 are short-circuited, a short circuit current Is flows from the battery 7 through the terminals T 1 and T 2 in the direction of the arrow. In the initial stage of this short circuit, a voltage is generated across the coil 1. This voltage (+ potential) is applied to the base b of the transistor 5 through the resistor 4 and a base current flows, so that the collector c and the emitter e of the transistor 5 are closed. As a result, the gate G voltage of FET3 is
The voltage becomes the side voltage, the drain D and the source S are opened, and the short-circuit current Is is cut off.
【００１８】ドレンＤとソ−スＳ間が開状態になると、
端子Ｔ1、Ｔ2が短絡状態の間は、端子Ｔ2より抵抗器４
を介してトランジスタ５のベ−スｂへ＋電圧が供給され
るので、ドレンＤとソ−スＳ間の開状態は、端子Ｔ1、
端子Ｔ2の短絡が解除されるまで継続され、短絡電流Ｉ
ｓは遮断される。また、同様に端子Ｔ1、端子Ｔ2を通し
て流れる過大電流の原因が解除されるまで、ドレンＤと
ソ−スＳ間は開状態となる。When the drain D and the source S are opened,
Terminal T 1, while the T 2 is short-circuited state, the resistor 4 from the terminal T 2
Since the + voltage is supplied to the base b of the transistor 5 via the terminal, the open state between the drain D and the source S is the terminal T 1 ,
This is continued until the short circuit of the terminal T 2 is released, and the short circuit current I
s is shut off. Similarly, the drain D and the source S are kept open until the cause of the excessive current flowing through the terminals T 1 and T 2 is eliminated.
【００１９】また、上記の動作説明は端子Ｔ1、Ｔ2が短
絡した場合を説明したが、負荷電流が急増した場合、短
絡の場合と同様にコイル１の両端に電圧が発生するの
で、コイル１のリアクタンスを適切に選べば、端子
Ｔ1、Ｔ2の完全短絡のみでなく負荷電流の急増する異常
時に負荷電流を遮断するように構成することが出来る。In the above description of the operation, the case where the terminals T 1 and T 2 are short-circuited has been explained. However, when the load current suddenly increases, a voltage is generated across the coil 1 as in the case of the short circuit. If the reactance of 1 is properly selected, the load current can be cut off not only when the terminals T 1 and T 2 are completely short-circuited but also when the load current suddenly increases.
【００２０】なお、本実施例は電池パックに組み込めば
安全で信頼性の高い手軽な携帯用電源を作ることが出来
る。In this embodiment, a safe, reliable and convenient portable power source can be made by incorporating it into a battery pack.
【００２１】[0021]
【発明の効果】以上説明したように本発明によれば、下
記のような優れた効果が得られる。 （１）電池装置の端子間を通して流れる電流に大きい変
動があった場合、制御手段は過渡的な電流変動を電圧に
変換し、該変換した電圧により電子スイッチを開くと共
に、該電子スイッチの開状態を維持するので、電池装置
の端子間が短絡した場合、又は、該端子を通して流れる
負荷電流が異常に急増した場合、電子スイッチは短絡電
流又は、負荷電流を遮断され、電池は保護され安全であ
る。As described above, according to the present invention, the following excellent effects can be obtained. (1) When there is a large fluctuation in the current flowing through the terminals of the battery device, the control means converts the transient current fluctuation into a voltage, opens the electronic switch by the converted voltage, and opens the electronic switch. Therefore, when the terminals of the battery device are short-circuited or the load current flowing through the terminals is abnormally rapidly increased, the electronic switch cuts off the short-circuit current or the load current, and the battery is protected and safe. .
【００２２】（２）電池装置の保護回路と充電器（又は
使用機器）の間は２個の端子（＋端子と−端子）で済
み、回路構成が簡単で且つ機械的動作がないので機構的
な制約も少なく保護回路が構成でき信頼性も高くなる。(2) Only two terminals (+ terminal and-terminal) are required between the protection circuit of the battery device and the charger (or equipment used), and the circuit configuration is simple and there is no mechanical operation. There are few restrictions and a protection circuit can be configured and reliability is improved.
【図１】本発明の電池装置の保護回路の例を示す図であ
る。FIG. 1 is a diagram showing an example of a protection circuit of a battery device of the present invention.
【図２】従来の電池パックの充電端子短絡防止回路の例
を示す図である。FIG. 2 is a diagram showing an example of a conventional charging terminal short circuit prevention circuit for a battery pack.
１ コイル ２ 抵抗器 ３ ＦＥＴ（電界効果トランジスタ） ４ 抵抗器 ５ トランジスタ ６ 抵抗器 ７ 電池 1 coil 2 resistor 3 FET (field effect transistor) 4 resistor 5 transistor 6 resistor 7 battery
Claims (1)
より充電電流を前記端子を通して前記電池に供給すると
共に、電源として使用する際は、該電池から前記端子を
通して機器に電流を供給する電池装置において、 前記電池と端子間に直列に電子スイッチと、前記端子を
通して流れる電流に大きい変動があった場合、該過渡的
な電流変動を電圧に変換し、該変換した電圧により前記
電子スイッチを開くと共に、該電子スイッチの開状態を
維持する制御手段を設けたことを特徴とする電池装置の
保護回路。1. A battery comprising a battery and a terminal, wherein a charging current is supplied from a charger through the terminal to the battery during charging, and a current is supplied from the battery through the terminal to a device when used as a power source. In the battery device, when there is a large variation in the current flowing through the terminal and an electronic switch in series between the battery and the terminal, the transient current variation is converted into a voltage, and the electronic switch is activated by the converted voltage. A protection circuit for a battery device, which is provided with a control means for opening and maintaining the open state of the electronic switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06701195A JP3270986B2 (en) | 1995-02-28 | 1995-02-28 | Battery device protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06701195A JP3270986B2 (en) | 1995-02-28 | 1995-02-28 | Battery device protection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08236161A true JPH08236161A (en) | 1996-09-13 |
| JP3270986B2 JP3270986B2 (en) | 2002-04-02 |
Family
ID=13332560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06701195A Expired - Fee Related JP3270986B2 (en) | 1995-02-28 | 1995-02-28 | Battery device protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3270986B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6946752B2 (en) | 2001-04-12 | 2005-09-20 | Nec Communication Systems, Ltd. | Input power stabilizing circuit |
| JP2005347080A (en) * | 2004-06-02 | 2005-12-15 | Sanyo Electric Co Ltd | Battery |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5743569U (en) * | 1980-08-26 | 1982-03-10 | ||
| JPS5798148U (en) * | 1980-12-08 | 1982-06-16 | ||
| JPH06303728A (en) * | 1993-04-09 | 1994-10-28 | Sanyo Electric Co Ltd | Overcurrent protective circuit for battery |
-
1995
- 1995-02-28 JP JP06701195A patent/JP3270986B2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5743569U (en) * | 1980-08-26 | 1982-03-10 | ||
| JPS5798148U (en) * | 1980-12-08 | 1982-06-16 | ||
| JPH06303728A (en) * | 1993-04-09 | 1994-10-28 | Sanyo Electric Co Ltd | Overcurrent protective circuit for battery |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6946752B2 (en) | 2001-04-12 | 2005-09-20 | Nec Communication Systems, Ltd. | Input power stabilizing circuit |
| JP2005347080A (en) * | 2004-06-02 | 2005-12-15 | Sanyo Electric Co Ltd | Battery |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3270986B2 (en) | 2002-04-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4788621A (en) | Molded case circuit breaker multiple accessory unit | |
| EP0850505B1 (en) | Overcurrent protection circuit | |
| US6331763B1 (en) | Devices and methods for protection of rechargeable elements | |
| US4604565A (en) | Microcomputer-controlled DC three-wire circuit for vehicle | |
| KR19990044603A (en) | Overcurrent prevention circuit | |
| US5473495A (en) | Combination load controller | |
| US4597025A (en) | Minimum size, integral, A.C. overload current sensing, remote power controller | |
| US20010020888A1 (en) | Electrical fuse for use in motor vehicles | |
| JP2000048703A (en) | Circuit breaker | |
| JP3309266B2 (en) | Battery pack short circuit prevention circuit | |
| US4345292A (en) | Minimum size, integral, A.C. overload current sensing, remote power controller | |
| US11087934B2 (en) | Arc-quenching device for direct current switch | |
| EP0298092B1 (en) | Circuit breaker trip solenoid assembly | |
| US4333122A (en) | Minimum size, integral, A.C. overload current sensing, remote power controller | |
| NZ228158A (en) | Circuit breaker electronic trip unit: trip test circuit | |
| JP3524675B2 (en) | Battery charge / discharge control device | |
| JPH08236161A (en) | Protection circuit for battery device | |
| US4471400A (en) | Protection of appliances against reversal of battery polarity | |
| US5570255A (en) | Overcurrent preventing circuit | |
| CA1079357A (en) | Ground fault protector with interchangeable rating plug | |
| EP0304196B1 (en) | Electric motor armature current control circuit | |
| JPS61116922A (en) | High-speed current-limiting breaker | |
| EP0007208B1 (en) | A.c. power overload protection control | |
| JP2003070153A (en) | Method for preventing overheat of secondary battery pack | |
| US20020196120A1 (en) | Non-energy limiting class 2 transformer with positive temperature protection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |