JPH08163704A - Leakage detector - Google Patents
Leakage detectorInfo
- Publication number
- JPH08163704A JPH08163704A JP6297577A JP29757794A JPH08163704A JP H08163704 A JPH08163704 A JP H08163704A JP 6297577 A JP6297577 A JP 6297577A JP 29757794 A JP29757794 A JP 29757794A JP H08163704 A JPH08163704 A JP H08163704A
- Authority
- JP
- Japan
- Prior art keywords
- leakage
- battery
- polarity
- earth
- resistor
- 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.)
- Pending
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
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Secondary Cells (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、例えば電気自動車の動
力用のバッテリの車体等への漏電接地を検出する漏電検
出装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an earth leakage detecting device for detecting earth leakage of a battery for powering an electric vehicle to a vehicle body or the like.
【０００２】[0002]
【従来の技術】この種の漏電検出装置として、例えば特
公昭５１−２４１６５号公報に開示された漏電チェック
回路がある。この漏電チェック回路は、図５に示すよう
に、複数の蓄電池Ｂ１，Ｂ２，Ｂ３，Ｂ４，Ｂ５からな
る蓄電池群Ｂの漏電を検出するために該蓄電池群Ｂの両
端にスイッチＳ，Ｓを介して抵抗器Ｒ１，Ｒ２，Ｒ３，
Ｒ４，Ｒ５を直列に接続するとともに、各抵抗器の接続
点に調整抵抗器ｒａ，ｒｂ，ｒｃ，ｒｄを介してパイロ
ットランプＬａ，Ｌｂ，Ｌｃ，Ｌｄをアースに接続する
ように構成したものである。2. Description of the Related Art As an earth leakage detecting device of this type, there is an earth leakage check circuit disclosed in Japanese Patent Publication No. 51-24165. As shown in FIG. 5, this leakage check circuit uses switches S and S at both ends of the storage battery group B in order to detect a leakage of the storage battery group B including a plurality of storage batteries B1, B2, B3, B4 and B5. Resistor R1, R2, R3
R4 and R5 are connected in series, and the pilot lamps La, Lb, Lc, and Ld are connected to the earth via adjusting resistors ra, rb, rc, and rd at the connection points of the resistors. is there.
【０００３】このように構成されたものにおいて、蓄電
池群Ｂの間の各接続点ａ，ｂ，ｃ，ｄのいずれかに漏電
接地が発生した場合、この漏電接地を検出するために、
スイッチＳ，Ｓを閉じると、この漏電接地した接続点
ａ，ｂ，ｃ，ｄに対応するパイロットランプＬａ，Ｌ
ｂ，Ｌｃ，Ｌｄのみが消灯または著しく暗く点灯し、そ
の他のパイロットランプは確実に点灯するので、この消
灯または著しく暗く点灯したパイロットランプから漏電
接地箇所を検出することができるものである。In such a structure, when a ground leakage occurs at any one of the connection points a, b, c, d between the storage battery groups B, in order to detect the ground leakage,
When the switches S, S are closed, the pilot lamps La, L corresponding to the grounded connection points a, b, c, d.
Since only b, Lc, and Ld are turned off or lighted extremely darkly, and the other pilot lamps are reliably lighted, it is possible to detect the earth leakage ground point from the pilot lamps turned off or extremely darkly lighted.
【０００４】また、上記従来の構成において、蓄電池群
Ｂの端部ｘまたはｙが漏電接地した場合には、その漏電
接地した端部側のパイロットランプが最も暗く、反対の
端部側に接続されているパイロットランプほど明るく点
灯するということにより蓄電池群Ｂの端部の漏電接地も
検出しようとするものである。Further, in the above conventional structure, when the end x or y of the storage battery group B is grounded to earth leakage, the pilot lamp on the side of the earthed ground is darkest and is connected to the opposite end side. It is intended to detect the ground leakage at the end of the storage battery group B by lighting the brighter the pilot lamp.
【０００５】[0005]
【発明が解決しようとする課題】上述した従来の漏電チ
ェック回路においては、蓄電池群Ｂの端部のいずれか一
方が漏電接地した場合には、この漏電接地を正確に検出
することができるが、該蓄電池群Ｂの両端部、すなわち
蓄電池群Ｂの＋極性側と−極性側の両端部の２箇所が漏
電接地した場合には、この漏電接地を適確に検出するこ
とができないという問題がある。In the above-mentioned conventional earth leakage check circuit, when either one of the ends of the storage battery group B is earthed, the earth leakage can be accurately detected. When both ends of the storage battery group B, that is, both ends of the storage battery group B on the + polarity side and the −polarity side are grounded, there is a problem that the grounded earth cannot be accurately detected. .
【０００６】具体的には、例えば蓄電池群Ｂの＋極性側
で１５ｍＡの漏電電流が流れ、−極性側で１０ｍＡの漏
電電流が流れた場合には、両者の差として、５ｍＡの漏
電電流が＋極性側に発生したものとして誤検出されてし
まい、また＋極性側の漏電電流と−極性側の漏電電流が
同じ値の場合には、漏電電流はゼロとなり、該漏電を検
出することができないという問題がある。Specifically, for example, when a leakage current of 15 mA flows on the positive polarity side of the storage battery group B and a leakage current of 10 mA flows on the negative polarity side, the leakage current of 5 mA is + as the difference between the two. It will be erroneously detected as something that occurred on the polarity side, and if the leakage current on the + polarity side and the leakage current on the-polarity side have the same value, the leakage current will be zero and the leakage cannot be detected. There's a problem.
【０００７】本発明は、上記に鑑みてなされたもので、
その目的とするところは、バッテリの両方の極性側で同
時に発生した漏電接地でも適確に検出することができる
漏電検出装置を提供することにある。The present invention has been made in view of the above,
It is an object of the present invention to provide an earth leakage detection device capable of accurately detecting earth leakage grounding that occurs simultaneously on both polarities of a battery.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するた
め、本発明の漏電検出装置は、バッテリの漏電を検出す
る漏電検出装置であって、バッテリの各極性にそれぞれ
接続された第１および第２のスイッチ手段と、各一端が
前記第１および第２のスイッチ手段を介してバッテリの
各極性にそれぞれ接続され、各他端が互いに接続された
第１および第２の抵抗と、前記第１および第２の抵抗の
接続点に一端が接続され、他端がアースに接続された回
路手段と、前記第１のスイッチ手段を閉じた場合に前記
回路手段に流れる電流および前記第２のスイッチ手段を
閉じた場合に前記回路手段に流れる電流に基づいてバッ
テリの漏電を検出する検出手段とを有することを要旨と
する。In order to achieve the above-mentioned object, an earth leakage detecting device of the present invention is an earth leakage detecting device for detecting earth leakage of a battery, wherein the earth leakage detecting device is connected to each polarity of the battery. Two switch means, first and second resistors each having one end connected to each polarity of the battery through the first and second switch means, and the other ends connected to each other, and the first switch. And circuit means having one end connected to the connection point of the second resistor and the other end connected to ground, and a current flowing through the circuit means when the first switch means is closed and the second switch means. And a detection means for detecting the leakage of the battery based on the current flowing through the circuit means when the circuit is closed.
【０００９】また、本発明の漏電検出装置は、前記回路
手段は抵抗であり、前記検出手段が該抵抗に発生する電
圧降下に基づいてバッテリの漏電を検出する手段を有す
ることを要旨とする。Further, the electric leakage detecting device of the present invention is characterized in that the circuit means is a resistor, and the detecting means has a means for detecting an electric leakage of the battery based on a voltage drop generated in the resistor.
【００１０】更に、本発明の漏電検出装置は、前記回路
手段が互いに逆接続された一対のダイオードおよび該一
対のダイオードの各々に直列に接続された発光手段を有
することを要旨とする。Further, the leakage detecting device of the present invention is characterized in that the circuit means has a pair of diodes reversely connected to each other and a light emitting means connected in series to each of the pair of diodes.
【００１１】本発明の漏電検出装置は、前記一対のダイ
オードと前記発光手段が発光ダイオードで構成されるこ
とを要旨とする。The gist of the leakage detecting device of the present invention is that the pair of diodes and the light emitting means are composed of light emitting diodes.
【００１２】[0012]
【作用】本発明の漏電検出装置では、バッテリの一方の
極性に接続されている第１のスイッチ手段を閉じた場合
には、図２に示すようにバッテリの当該極性から第１の
スイッチ手段、第１の抵抗、回路手段、アース、漏電抵
抗、バッテリへ至る閉回路が形成され、この閉回路を漏
電電流が流れる。これにより、該回路手段に流れる電流
に基づきバッテリの他方の極性側の漏電を検出できる。In the earth leakage detecting device of the present invention, when the first switch means connected to one polarity of the battery is closed, as shown in FIG. A closed circuit leading to the first resistance, the circuit means, the ground, the leakage resistance, and the battery is formed, and the leakage current flows through this closed circuit. Accordingly, it is possible to detect the leakage on the other polarity side of the battery based on the current flowing through the circuit means.
【００１３】また第２のスイッチ手段を閉じた場合に
は、図３に示すようにバッテリの一方の極性から漏電抵
抗、アース、回路手段、第２の抵抗、第２のスイッチ手
段、バッテリの経路で漏電電流が流れる。これにより、
該回路手段に流れる電流に基づきバッテリの一方の極性
側の漏電を検出できる。When the second switch means is closed, as shown in FIG. 3, the leakage resistance, ground, circuit means, second resistance, second switch means, battery path from one polarity of the battery. Leakage current flows. This allows
Based on the current flowing through the circuit means, it is possible to detect a leakage current on one polarity side of the battery.
【００１４】また、本発明の漏電検出装置では、前記回
路手段を構成する抵抗に発生する電圧降下に基づいてバ
ッテリの漏電を検出することができる。Further, in the leakage detecting device of the present invention, it is possible to detect the leakage of the battery based on the voltage drop generated in the resistor forming the circuit means.
【００１５】更に、本発明の漏電検出装置では、前記回
路手段を構成する一対のダイオードおよび発光手段に漏
電電流が流れることにより、該発光手段が発光し、漏電
を検出することができる。Further, in the leakage detecting device of the present invention, when the leakage current flows through the pair of diodes and the light emitting means forming the circuit means, the light emitting means emits light and the leakage can be detected.
【００１６】本発明の漏電検出装置では、発光ダイオー
ドに漏電電流が流れることにより、該発光ダイオードが
発光し、漏電を検出することができる。In the leak detecting device of the present invention, when a leak current flows through the light emitting diode, the light emitting diode emits light and the leak can be detected.
【００１７】[0017]
【実施例】以下、図面を用いて本発明の実施例を説明す
る。Embodiments of the present invention will be described below with reference to the drawings.
【００１８】図１は、本発明の一実施例に係る漏電検出
装置の構成を示す回路図である。同図に示す漏電検出装
置は、例えば電気自動車の動力用の高圧系バッテリ１の
漏電を検出するものであり、該高圧系バッテリ１は＋極
性端子１ａに接続された＋極性側ケーブル３および−極
性端子１ｂに接続された−極性ケーブル５を介してモー
タ等の車両負荷７に接続され、該車両負荷７に高圧系バ
ッテリ１の例えば３００Ｖのような高電圧を供給してい
る。FIG. 1 is a circuit diagram showing the structure of a leakage detecting device according to an embodiment of the present invention. The leakage detection device shown in the figure is for detecting leakage of a high-voltage battery 1 for powering an electric vehicle, for example, and the high-voltage battery 1 is connected to a + polarity terminal 1a with a + polarity side cable 3 and −. It is connected to a vehicle load 7 such as a motor via a negative polarity cable 5 connected to the polarity terminal 1b and supplies a high voltage such as 300V of the high voltage system battery 1 to the vehicle load 7.
【００１９】前記＋極性側ケーブル３と−極性ケーブル
５との間には、漏電検出装置９が接続されている。この
漏電検出装置９は、＋極性側ケーブル３および−極性ケ
ーブル５にそれぞれ第１のリレー接点１１ｃおよび第２
のリレー接点１３ｃが接続された第１のリレー１１およ
び第２のリレー１３を有し、第１のリレー接点１１ｃと
第２のリレー接点１３ｃとの間には第１の抵抗１５およ
び第２の抵抗１７が直列に接続されている。両抵抗１
５，１７の接続点は、第３の抵抗２１を介して低圧系バ
ッテリの車体アース３１に接続されている。なお、この
低圧系バッテリは例えば１２Ｖであり、例えば前記車両
負荷７を構成するモータ等以外の部分である補機に対し
てその動作電圧を供給するものである。A leakage detector 9 is connected between the positive polarity cable 3 and the negative polarity cable 5. In this leakage detection device 9, the positive polarity cable 3 and the negative polarity cable 5 have a first relay contact 11c and a second relay contact 11c, respectively.
Has a first relay 11 and a second relay 13 to which the relay contact 13c is connected, and a first resistor 15 and a second relay 15 are provided between the first relay contact 11c and the second relay contact 13c. The resistor 17 is connected in series. Both resistors 1
The connection points of 5 and 17 are connected to the vehicle body ground 31 of the low-voltage battery via the third resistor 21. The low-voltage battery has a voltage of 12 V, for example, and supplies its operating voltage to auxiliary equipment, which is a portion other than the motor or the like that constitutes the vehicle load 7.
【００２０】前記第１のリレー１１および第２のリレー
１３のそれぞれの第１のリレー巻線１１ｗおよび第２の
リレー巻線１３ｗは、漏電検出制御部１９によって駆動
制御され、これにより第１のリレー１１および第２のリ
レー１３のそれぞれの第１のリレー接点１１ｃおよび第
２のリレー接点１３ｃは開閉するようになっている。The first relay winding 11w and the second relay winding 13w of each of the first relay 11 and the second relay 13 are drive-controlled by an earth leakage detection control unit 19, whereby the first relay winding 11w and the second relay winding 13w are controlled. The first relay contact 11c and the second relay contact 13c of each of the relay 11 and the second relay 13 are adapted to open and close.
【００２１】また、前記第３の抵抗２１の両端は、前記
漏電検出制御部１９に接続され、後述するように、該第
３の抵抗２１に発生する電圧降下が漏電検出制御部１９
に供給され、これにより漏電検出制御部１９は漏電を検
出するようになっている。Both ends of the third resistor 21 are connected to the leakage detection control unit 19, and a voltage drop generated in the third resistor 21 causes a leakage detection control unit 19 as described later.
And the leakage detection control unit 19 detects the leakage.
【００２２】更に、漏電検出制御部１９には漏電警告表
示部２３が接続され、漏電検出制御部１９が漏電を検出
した場合、漏電検出制御部１９の制御により漏電警告表
示部２３が警告表示を行うようになっている。Further, an earth leakage warning display section 23 is connected to the earth leakage detection control section 19, and when the earth leakage detection control section 19 detects an earth leakage, the earth leakage warning display section 23 displays a warning display under the control of the earth leakage detection control section 19. I am supposed to do it.
【００２３】以上のように構成された漏電検出装置にお
いて、漏電検出を行わない場合には、第１のリレー１１
および第２のリレー１３を作動させず、その第１のリレ
ー接点１１ｃおよび第２のリレー接点１３ｃを開放状態
のままにしておくため、高圧系バッテリ１および低圧系
バッテリには消費電流が流れない。In the earth leakage detecting device configured as described above, when the earth leakage is not detected, the first relay 11
Also, since the first relay contact 11c and the second relay contact 13c are left in the open state without operating the second relay 13, current consumption does not flow in the high voltage battery 1 and the low voltage battery. .
【００２４】また、図１において点線で示すように、例
えば高圧系バッテリ１の＋極性側ケーブル３に漏電が発
生し、該＋極性側ケーブル３が漏電抵抗２５を介してア
ース３１に漏電接地された場合、これを検出するには、
漏電検出制御部１９の制御により第２のリレー１３の第
２のリレー巻線１３ｗを駆動して、該第２のリレー１３
を作動し、その第２のリレー接点１３ｃを閉じる。する
と、高圧系バッテリ１の＋極性端子１ａから＋極性側ケ
ーブル３、漏電抵抗２５、アース３１、第３の抵抗２
１、第２の抵抗１７、第２のリレー接点１３ｃ、−極性
ケーブル５を介して高圧系バッテリ１の−極性端子１ｂ
の経路で閉ループが形成され、これにより高圧系バッテ
リ１から同経路を通って漏電電流が流れ、この漏電電流
により第３の抵抗２１に電圧降下が発生する。Further, as indicated by a dotted line in FIG. 1, for example, the + polarity side cable 3 of the high voltage system battery 1 is leaked, and the + polarity side cable 3 is leaked to the earth 31 via the leakage resistance 25. If you want to detect this,
The second relay winding 13w of the second relay 13 is driven by the control of the electric leakage detection control unit 19, and the second relay 13 is driven.
To close the second relay contact 13c. Then, from the + polarity terminal 1a of the high-voltage battery 1 to the + polarity side cable 3, the leakage resistance 25, the earth 31, the third resistance 2
1, the second resistor 17, the second relay contact 13c, the negative polarity cable 5 through the negative polarity terminal 1b of the high-voltage battery 1
A closed loop is formed in the path of, and as a result, a leakage current flows from the high voltage system battery 1 through the same path, and this leakage current causes a voltage drop in the third resistor 21.
【００２５】この第３の抵抗２１の電圧降下は、漏電検
出制御部１９に供給されるため、該漏電検出制御部１９
は該電圧降下の方向および大きさに基づいて漏電抵抗２
５による漏電電流を検出することができる。Since the voltage drop of the third resistor 21 is supplied to the leakage detection control unit 19, the leakage detection control unit 19 is provided.
Is the leakage resistance 2 based on the direction and magnitude of the voltage drop.
It is possible to detect the leakage current due to the number 5.
【００２６】また、図１において高圧系バッテリ１の−
極性ケーブル５に漏電が発生し、該−極性ケーブル５が
漏電抵抗２７を介してアース３１に漏電接地された場
合、これを検出するには、漏電検出制御部１９により第
１のリレー１１を作動し、その第１のリレー接点１１ｃ
を閉じる。この結果、高圧系バッテリ１の＋極性端子１
ａから＋極性側ケーブル３、第１のリレー接点１１ｃ、
第１の抵抗１５、第３の抵抗２１、アース３１、漏電抵
抗２７、−極性ケーブル５を介して高圧系バッテリ１の
−極性端子１ｂの経路で閉ループが形成され、これによ
り高圧系バッテリ１から同経路を通って漏電電流が流
れ、この漏電路により第３の抵抗２１に電圧が発生す
る。Further, in FIG.
When an electric leakage occurs in the polar cable 5 and the negative polarity cable 5 is earth-grounded to the earth 31 via the earth leakage resistance 27, in order to detect this, the earth leakage detection control unit 19 activates the first relay 11. The first relay contact 11c
Close. As a result, the positive polarity terminal 1 of the high-voltage battery 1
a to + polarity side cable 3, first relay contact 11c,
A closed loop is formed in the path of the-polarity terminal 1b of the high-voltage battery 1 via the first resistor 15, the third resistor 21, the earth 31, the earth leakage resistor 27, and the-polarity cable 5, so that from the high-voltage battery 1 A leakage current flows through the same path, and a voltage is generated in the third resistor 21 by this leakage path.
【００２７】この第３の抵抗２１の電圧降下は、漏電検
出制御部１９に供給され、漏電検出制御部１９は該電圧
降下の方向および大きさに基づいて漏電抵抗２７による
漏電電流を検出することができる。The voltage drop of the third resistor 21 is supplied to the leakage detection control unit 19, and the leakage detection control unit 19 detects the leakage current by the leakage resistance 27 based on the direction and the magnitude of the voltage drop. You can
【００２８】また更に、高圧系バッテリ１の＋極性側ケ
ーブル３および−極性ケーブル５の両方に漏電抵抗２５
および漏電抵抗２７のような漏電が同時に発生したとし
ても、漏電検出制御部１９が第１のリレー１１および第
２のリレー１３を一つずつ動作させるように制御するこ
とにより、漏電抵抗２５による漏電電流と漏電抵抗２７
による漏電電流とをそれぞれ別々に検出することができ
る。Furthermore, the leakage resistance 25 is applied to both the positive polarity side cable 3 and the negative polarity cable 5 of the high voltage system battery 1.
Even if a leakage such as the leakage resistance 27 occurs at the same time, the leakage detection control unit 19 controls the first relay 11 and the second relay 13 to operate one by one, so that the leakage resistance 25 causes the leakage. Current and leakage resistance 27
Can be separately detected.
【００２９】なお、上記実施例において、第１の抵抗１
５および第２の抵抗１７は同じ抵抗値を有するものであ
り、その値は高圧系バッテリ１の電圧と検出しようとす
る漏電電流値に合わせて調整されるものである。In the above embodiment, the first resistor 1
5 and the second resistor 17 have the same resistance value, and their values are adjusted according to the voltage of the high voltage system battery 1 and the leakage current value to be detected.
【００３０】図４は、本発明の他の実施例に係る漏電検
出装置の構成を示す回路図である。同図に示す漏電検出
装置は、図１に示した実施例において前記第３の抵抗２
１の代わりに、発光ダイオード４１とダイオード４３の
直列接続回路に同様な発光ダイオード４５とダイオード
４７の直接接続回路をダイオードの極性が逆になるよう
に並列接続した回路を設けるとともに、前記漏電警告表
示部２３を削除し、更に前記漏電検出制御部１９を制御
部４９で置き換え、これにより発光ダイオード４１，４
５の点灯により漏電警告表示機能を代替し、かつ制御部
４９の機能を単に第１のリレー１１および第２のリレー
１３の駆動制御のみに簡略化した点が異なるのみで、そ
の他の構成作用は図１の実施例と同じである。FIG. 4 is a circuit diagram showing the structure of a leakage detecting device according to another embodiment of the present invention. The leakage detecting device shown in the figure is similar to the third resistor 2 in the embodiment shown in FIG.
In place of 1, a circuit in which a similar direct connection circuit of the light emitting diode 45 and the diode 47 is connected in parallel to the series connection circuit of the light emitting diode 41 and the diode 43 so that the polarities of the diodes are reversed and the leakage warning display The section 23 is deleted, and the leakage detection control section 19 is replaced with a control section 49, whereby the light emitting diodes 41, 4
5 is turned on to replace the leakage warning display function, and the function of the control unit 49 is simply simplified to drive control of the first relay 11 and the second relay 13 only. This is the same as the embodiment of FIG.
【００３１】更に詳しくは、図４に示す漏電検出装置に
おいては、前記漏電抵抗２５による漏電電流を検出する
には、制御部４９により第２のリレー１３を駆動して、
その第２のリレー接点１３ｃを閉じる。すると、高圧系
バッテリ１の＋極性端子１ａから＋極性側ケーブル３、
漏電抵抗２５、アース３１、発光ダイオード４５、ダイ
オード４７、第２の抵抗１７、第２のリレー接点１３
ｃ、−極性ケーブル５を介して高圧系バッテリ１の−極
性端子１ｂの経路で閉ループが形成され、これにより高
圧系バッテリ１から同経路を通って漏電電流が流れ、こ
の漏電電流が所定の値より大きくなると、発光ダイオー
ド４５が点灯するので、この点灯により高圧系バッテリ
１の＋極性側、すなわち＋極性側ケーブル３に漏電接地
が発生したことが検出される。More specifically, in the leakage detection device shown in FIG. 4, in order to detect the leakage current due to the leakage resistance 25, the controller 49 drives the second relay 13,
The second relay contact 13c is closed. Then, from the positive polarity terminal 1a of the high voltage system battery 1 to the positive polarity side cable 3,
Earth leakage resistance 25, earth 31, light emitting diode 45, diode 47, second resistor 17, second relay contact 13
c, a closed loop is formed in the path of the negative polarity terminal 1b of the high voltage system battery 1 via the negative polarity cable 5, whereby a leakage current flows from the high voltage system battery 1 through the same route, and this leakage current has a predetermined value. When the light emitting diode 45 becomes larger, the light emitting diode 45 is turned on, so that it is detected that the grounding has occurred on the + polarity side of the high-voltage battery 1, that is, the + polarity side cable 3 due to the lighting.
【００３２】また、同様に、前記漏電抵抗２７による漏
電電流を検出するには、制御部４９により第１のリレー
１１を駆動して、その第１のリレー接点１１ｃを閉じ
る。すると、高圧系バッテリ１の＋極性端子１ａから＋
極性側ケーブル３、第１のリレー接点１１ｃ、第１の抵
抗１５、発光ダイオード４１、ダイオード４３、アース
３１、漏電抵抗２７、−極性ケーブル５を介して高圧系
バッテリ１の−極性端子１ｂの経路で閉ループが形成さ
れ、これにより高圧系バッテリ１から同経路を通って漏
電電流が流れ、この漏電電流が所定の値より大きくなる
と、発光ダイオード４１が点灯するので、この点灯によ
り高圧系バッテリ１の−極性側、すなわち−極性側ケー
ブル５に漏電接地が発生したことが検出される。Similarly, in order to detect the leakage current due to the leakage resistance 27, the control unit 49 drives the first relay 11 to close the first relay contact 11c. Then, from the + polarity terminal 1a of the high voltage system battery 1,
Polarity side cable 3, 1st relay contact 11c, 1st resistance 15, light emitting diode 41, diode 43, earth 31, earth leakage resistance 27, -path of negative polarity terminal 1b of high voltage system battery 1 via-polarity cable 5 As a result, a closed loop is formed, whereby a leakage current flows from the high-voltage system battery 1 through the same path, and when the leakage current becomes larger than a predetermined value, the light emitting diode 41 lights up. It is detected that a ground fault has occurred in the negative polarity side cable 5, that is, the negative polarity side cable 5.
【００３３】また更に、高圧系バッテリ１の＋極性側ケ
ーブル３および−極性ケーブル５の両方に漏電抵抗２５
および漏電抵抗２７のような漏電が同時に発生したとし
ても、漏電検出制御部１９が第１のリレー１１および第
２のリレー１３を一つずつ動作させるように制御するこ
とにより、漏電抵抗２５による漏電電流と漏電抵抗２７
による漏電電流とをそれぞれ別々に検出することができ
る。Furthermore, the leakage resistance 25 is applied to both the positive polarity side cable 3 and the negative polarity cable 5 of the high voltage system battery 1.
Even if a leakage such as the leakage resistance 27 occurs at the same time, the leakage detection control unit 19 controls the first relay 11 and the second relay 13 to operate one by one, so that the leakage resistance 25 causes the leakage. Current and leakage resistance 27
Can be separately detected.
【００３４】なお、上記実施例において、各発光ダイオ
ードの代わりとして、特性の異なる複数の発光ダイオー
ドを設け、漏電抵抗の大きさにより異なって流れる漏電
電流により該複数の発光ダイオードが段階的に点灯する
ように構成することにより、漏電電流を段階的に検出す
ることができる。In the above embodiment, instead of each light emitting diode, a plurality of light emitting diodes having different characteristics are provided, and the plurality of light emitting diodes are lit in stages by the leakage current flowing differently depending on the magnitude of the leakage resistance. With such a configuration, it is possible to detect the leakage current stepwise.
【００３５】[0035]
【発明の効果】以上説明したように、本発明によれば、
第１および第２のスイッチ手段を切り替え制御すること
により、バッテリの一方の極性側のみに発生した漏電の
みならず、バッテリの両方の極性側に同時に発生した漏
電でもそれぞれを個別にかつ適確に検出することができ
る。また、漏電電流を検出する回路手段として、発光ダ
イオードを使用することにより、漏電の検出、警報表示
機能を経済的かつ小型に構成することができる。As described above, according to the present invention,
By controlling the switching of the first and second switch means, not only the leakage occurring only on one polarity side of the battery but also the leakage simultaneously occurring on both polarity sides of the battery can be individually and accurately performed. Can be detected. Further, by using the light emitting diode as the circuit means for detecting the leakage current, the function of detecting the leakage and the alarm display function can be constructed economically and in a small size.
【図１】本発明の一実施例に係る漏電検出装置の構成を
示す回路図である。FIG. 1 is a circuit diagram showing a configuration of an earth leakage detection device according to an embodiment of the present invention.
【図２】第１のスイッチ手段を閉じたときの漏電電流Ｉ
1 の経路を示す図である。FIG. 2 is a leakage current I when the first switch means is closed.
It is a figure which shows the route of 1 .
【図３】第２のスイッチ手段を閉じたときの漏電電流Ｉ
2 の経路を示す図である。FIG. 3 is a leakage current I when the second switch means is closed.
It is a figure which shows the route of 2 .
【図４】本発明の他の実施例に係る漏電検出装置の構成
を示す回路図である。FIG. 4 is a circuit diagram showing a configuration of an earth leakage detection device according to another embodiment of the present invention.
【図５】従来の漏電チェック回路の構成を示す回路図で
ある。FIG. 5 is a circuit diagram showing a configuration of a conventional leakage check circuit.
１ 高圧系バッテリ ９ 漏電検出装置 １１ 第１のリレー １３ 第２のリレー １５ 第１の抵抗 １７ 第２の抵抗 １９ 漏電検出制御部 ２１ 第３の抵抗（回路手段） ２３ 漏電警告表示部 ４１，４５ 発光ダイオード DESCRIPTION OF SYMBOLS 1 High-voltage system battery 9 Leakage detection device 11 1st relay 13 2nd relay 15 1st resistance 17 2nd resistance 19 Leakage detection control part 21 3rd resistance (circuit means) 23 Leakage warning display part 41, 45 Light emitting diode
Claims (4)
であって、 バッテリの各極性にそれぞれ接続された第１および第２
のスイッチ手段と、 各一端が前記第１および第２のスイッチ手段を介してバ
ッテリの各極性にそれぞれ接続され、各他端が互いに接
続された第１および第２の抵抗と、 前記第１および第２の抵抗の接続点に一端が接続され、
他端がアースに接続された回路手段と、 前記第１のスイッチ手段を閉じた場合に前記回路手段に
流れる電流および前記第２のスイッチ手段を閉じた場合
に前記回路手段に流れる電流に基づいてバッテリの漏電
を検出する検出手段とを有することを特徴とする漏電検
出装置。1. A leakage detection device for detecting leakage of a battery, comprising first and second electrodes connected to respective polarities of the battery.
Switch means, first and second resistors each having one end connected to each polarity of the battery through the first and second switch means, and the other ends connected to each other, and the first and second resistors. One end is connected to the connection point of the second resistor,
Based on a circuit means having the other end connected to the ground, a current flowing through the circuit means when the first switch means is closed, and a current flowing through the circuit means when the second switch means is closed. An electric leakage detection device comprising: a detection unit that detects an electric leakage of the battery.
段は該抵抗に発生する電圧降下に基づいてバッテリの漏
電を検出する手段を有することを特徴とする請求項１記
載の漏電検出装置。2. The leakage detection device according to claim 1, wherein the circuit means is a resistance, and the detection means has means for detecting a leakage of the battery based on a voltage drop generated in the resistance.
対のダイオードおよび該一対のダイオードの各々に直列
に接続された発光手段を有することを特徴とする請求項
１記載の漏電検出装置。3. The earth leakage detection device according to claim 1, wherein the circuit means has a pair of diodes which are reversely connected to each other and a light emitting means which is connected in series to each of the pair of diodes.
は、発光ダイオードで構成されることを特徴とする請求
項３記載の漏電検出装置。4. The earth leakage detection device according to claim 3, wherein the pair of diodes and the light emitting means are light emitting diodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6297577A JPH08163704A (en) | 1994-11-30 | 1994-11-30 | Leakage detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6297577A JPH08163704A (en) | 1994-11-30 | 1994-11-30 | Leakage detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08163704A true JPH08163704A (en) | 1996-06-21 |
Family
ID=17848361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6297577A Pending JPH08163704A (en) | 1994-11-30 | 1994-11-30 | Leakage detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08163704A (en) |
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| JP2013092396A (en) * | 2011-10-24 | 2013-05-16 | Keihin Corp | Leakage detection device |
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