JPS6377329A - Circuit for a voiding reverse connection of battery - Google Patents
Circuit for a voiding reverse connection of batteryInfo
- Publication number
- JPS6377329A JPS6377329A JP22038686A JP22038686A JPS6377329A JP S6377329 A JPS6377329 A JP S6377329A JP 22038686 A JP22038686 A JP 22038686A JP 22038686 A JP22038686 A JP 22038686A JP S6377329 A JPS6377329 A JP S6377329A
- Authority
- JP
- Japan
- Prior art keywords
- storage battery
- converter
- reverse connection
- circuit
- load
- 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
- 230000002265 prevention Effects 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 5
- SJAPSPJRTQCDNO-UHFFFAOYSA-N 6-chloro-1,2-benzoxazol-3-one Chemical compound ClC1=CC=C2C(O)=NOC2=C1 SJAPSPJRTQCDNO-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 206010011224 Cough Diseases 0.000 description 1
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（概要〕
ＡＣ／ＤＣ変換器の出力に負荷と並列に蓄電池を接続す
る直流給電システムにおいて、該蓄電池を逆極性に接続
した場合にこれを判定して信号を出力する逆接続判定回
路と、該信号により開閉素子をオフに切り替える切り替
え装置を設け、該蓄電池を逆接続した場合に該開閉素子
をオープンにして負荷、及び該ＡＣ／ＤＣ変換器を破損
から保護するものである。[Detailed Description of the Invention] (Summary) In a DC power supply system in which a storage battery is connected to the output of an AC/DC converter in parallel with a load, it is determined when the storage battery is connected with reverse polarity and a signal is output. A device that includes a reverse connection determination circuit and a switching device that turns off a switching element based on the signal, and opens the switching element when the storage battery is reversely connected to protect the load and the AC/DC converter from damage. It is.
本発明は、電子交換機あるいは防災無線などに使用され
る直流給電システムの蓄電池逆接続防止回路の改良に関
するものである。The present invention relates to an improvement in a storage battery reverse connection prevention circuit for a DC power supply system used in electronic exchanges or disaster prevention radio systems.
直流電源を使用する装置においては、ＡＣ／ＤＣ変換器
と蓄電池を装備し、常時はＡ Ｃ／Ｄ Ｃ変換器を使用
するが、ＡＣ電源が停電した場合ＡＣ／ＤＣ変換器によ
り充電した蓄電池を使用する該直流給電システムを使用
するようにしている。Equipment that uses a DC power source is equipped with an AC/DC converter and a storage battery, and the AC/DC converter is normally used, but in the event of an AC power outage, the storage battery charged by the AC/DC converter can be used. The DC power supply system used is used.
そして該直流給電システムに蓄電池を新設する場合逆極
性に接続すると、負荷及び該Ａ Ｃ／Ｄ Ｃ変換器を破
損することがある。When a new storage battery is installed in the DC power supply system, if it is connected with reverse polarity, the load and the AC/DC converter may be damaged.
このため該直流給電システムに蓄電池逆接続防止回路が
使用されるが、出来るだけ低コストで、スペースをとら
ないことが望ましい。For this reason, a storage battery reverse connection prevention circuit is used in the DC power supply system, but it is desirable that the circuit be as low cost as possible and as space consuming as possible.
第３図は従来例の蓄電池逆接続防止回路図である。 FIG. 3 is a diagram of a conventional storage battery reverse connection prevention circuit.
第３図において、Ａ Ｃ／Ｄ Ｃ変換器１でＡＣ入力電
圧が例えば４８Ｖあるいは２４ＶのＤＣ電圧に変換され
、常時は閉じているリレーの接点８を介して電子交換機
あるいは防災無線などの負荷２に供給される。In FIG. 3, an AC input voltage is converted into a DC voltage of, for example, 48V or 24V by an A C/DC converter 1, and is connected to a load 2 such as an electronic exchange or a disaster prevention radio via a normally closed relay contact 8. supplied to
同時にＡ Ｃ／Ｄ Ｃ変換器１の出力は、分岐されサー
キットブレーカ（以下ＣＢと称する）１０を介して蓄電
池３を充電する。At the same time, the output of the A C/DC converter 1 is branched to charge the storage battery 3 via a circuit breaker (hereinafter referred to as CB) 10.
該蓄電池３の両端には該ＣＢＩＯを介してダイオード９
が蓄電池３の極性と逆方向に接続される。A diode 9 is connected to both ends of the storage battery 3 via the CBIO.
is connected in the opposite direction to the polarity of the storage battery 3.
該直流給電システムに該蓄電池３を予め決められた方向
とは逆方向に接続したとき、該ダイオード９が順方向と
なり、該ＣＢＩＯを介して数千アンペア程度の大電流が
該ダイオード９に流れ該ＣＢ１０がオープンになり、順
方向の電流に対して設計されている負荷２、及びＡ Ｃ
／Ｄ Ｃ変換器１を破壊から防止する。When the storage battery 3 is connected to the DC power supply system in a direction opposite to the predetermined direction, the diode 9 becomes forward direction, and a large current of about several thousand amperes flows to the diode 9 through the CBIO. CB10 becomes open, load 2 is designed for forward current, and A C
/DC converter 1 is prevented from being destroyed.
尚、該ダイオード９として小型で小容量のものを使用す
ると、該蓄電池３を逆接続したとき、ＣＢＩＯが動作し
てオープンになるまえに、該ダイオード９が破損して該
ダイオード９の両端がオープンになり、逆接続した該蓄
電池３の電圧が負荷２及びＡ Ｃ／Ｄ Ｃ変換器１に加
わり、該負荷２及びＡ Ｃ／Ｄ Ｃ変換器１を破損する
。Note that if a small and low capacity diode 9 is used, when the storage battery 3 is reversely connected, the diode 9 will be damaged and both ends of the diode 9 will be open before the CBIO operates and becomes open. Then, the voltage of the reversely connected storage battery 3 is applied to the load 2 and the AC/DC converter 1, damaging the load 2 and the AC/DC converter 1.
このためＣＢＩＯが動作してオープンになるまえに該ダ
イオード９が破損しないような大型で大容量のダイオー
ドを使用する必要がある。Therefore, it is necessary to use a large and large-capacity diode that will not damage the diode 9 before the CBIO operates and becomes open.
しかしながら上述の蓄電池逆接続防止回路においては、
蓄電池の逆方向接続による負荷及びＳＲＡＣ／ＤＣ変換
器の破損を防止するために、大型で大容量のダイオード
を使用し、コスト及びスペースが大幅に増大するという
問題点があった。However, in the storage battery reverse connection prevention circuit described above,
In order to prevent damage to the load and the SRAC/DC converter due to reverse connection of the storage battery, a large and large-capacity diode is used, which poses a problem in that cost and space are significantly increased.
上記問題点は、第１図に示すようにＡＣ／ＤＣ変換器１
の出力に負荷２と並列に蓄電池３を接続する端子を有す
る直流給電システムにおいて、該Ａ Ｃ／Ｄ Ｃ変換器
１の出力と該蓄電池３を接続する端子の間に、該蓄電池
３を該端子に接続したとき、該蓄電池３の正負の方向を
判定して信号を出力する逆接続判定回路４と、該逆接続
の判定信号により制御され、該蓄電池３と負荷２及びＡ
Ｃ／ＤＣ変換器１の接続を断にする切り替え装置５を設
けた本発明の蓄電池逆接続防止回路によって解決される
。The above problem is caused by the AC/DC converter 1 as shown in FIG.
In a DC power supply system having a terminal for connecting a storage battery 3 to the output of the A C/DC converter 1 in parallel with the load 2, the storage battery 3 is connected to the terminal between the output of the A C/DC converter 1 and the terminal for connecting the storage battery 3. is controlled by a reverse connection determination circuit 4 that determines the positive or negative direction of the storage battery 3 and outputs a signal when connected to the storage battery 3, the load 2, and the reverse connection determination signal.
This problem is solved by the storage battery reverse connection prevention circuit of the present invention, which is provided with a switching device 5 that disconnects the C/DC converter 1.
本発明によれば、蓄電池３を逆極性に接続したとき逆接
続判定回路４においてこれを判定し、咳判定信号により
切り替え装置５内の開閉素子をオープンに切り替えて、
蓄電池３による電流が負荷２及び該Ａ Ｃ／Ｄ Ｃ変換
器１に流れないようにする。According to the present invention, when the storage battery 3 is connected to the reverse polarity, the reverse connection determination circuit 4 determines this, and the switching device 5 switches the opening/closing element in the switching device 5 to open based on the cough determination signal.
Prevent current from the storage battery 3 from flowing to the load 2 and the AC/DC converter 1.
この結果、低コストで小型の回路により負荷、及び該Ａ
Ｃ／Ｄ Ｃ変換器の破損を防ぐことが出来る。As a result, a low-cost, compact circuit can handle the load and the A
Damage to the C/DC converter can be prevented.
第２図は本発明の実施例の蓄電池逆接続防止回路図であ
る。FIG. 2 is a circuit diagram for preventing reverse connection of a storage battery according to an embodiment of the present invention.
全図を通じて同一符号は同一対象物を示す。The same reference numerals indicate the same objects throughout the figures.
本発明が従来例と異なる点は、蓄電池３の両端にＣＢＩ
Ｏを介して接続した大型で大容量のダイオード９を除去
し、代わりに第２図に示す回路を設けたことにある。The difference between the present invention and the conventional example is that CBI is installed at both ends of the storage battery 3.
The reason is that the large, large-capacity diode 9 connected through O is removed, and the circuit shown in FIG. 2 is provided in its place.
即ち、第２図において該直流給電システムに新規に蓄電
池３を設置するとき、誤って逆極性に接続したとすると
、ｂ点とｅ点の間に抵抗Ｒ１、Ｒユと直列に接続したダ
イオード１３が逆極性のため電流が流れなくなり、ｐｎ
ｐ）ランジスタ１４のベースとエミッタの電位は等しく
なり、ｐｎｐトランジスタ１４に電流が流れなくなる。That is, in FIG. 2, when newly installing the storage battery 3 in the DC power supply system, if it is mistakenly connected to the opposite polarity, the resistor R1 and the diode 13 connected in series with the resistor R1 and RU between points b and e. Since the polarity is reversed, current no longer flows, and pn
p) The base and emitter potentials of the transistor 14 become equal, and no current flows through the pnp transistor 14.
このため切り替え装置５内のリレー駆動装置６′ が動
作しなくなり、リレーの接点８及び１１がオープンにな
る。As a result, the relay drive device 6' in the switching device 5 becomes inoperable, and the contacts 8 and 11 of the relay become open.
その結果、点ａからリレーの接点１１、ＣＢ１２を介し
て蓄電池３を通して点すに至る径路がオープンになり、
該負荷２及び該ＡＣ／ＤＣ変換器１を破壊から防ぐ。As a result, the path from point a through the relay contacts 11 and CB12 to the storage battery 3 is opened,
The load 2 and the AC/DC converter 1 are prevented from being destroyed.
次に蓄電池３を正規の方向に接続したとき、ｐｎｐ）ラ
ンジスタ１４のベースの電位が抵抗Ｒ，による電圧効果
のためエミッタの電位より低くなり、該ｐｎｐ）ランジ
スタ１４に電流が流れ、該電流によりリレー駆動装置６
′ を駆動してリレーの接点８、及び１１を閉じる。Next, when the storage battery 3 is connected in the normal direction, the potential at the base of the pnp transistor 14 becomes lower than the emitter potential due to the voltage effect caused by the resistor R, and a current flows through the pnp transistor 14. Relay drive device 6
' to close relay contacts 8 and 11.
この結果、Ａ Ｃ／Ｄ Ｃ変換器１の直流出力電圧が該
リレーの接点８を介して負荷２に供給され、又、点ａで
分岐してリレーの接点１１を介して蓄電池３を充電する
。As a result, the DC output voltage of the A C/DC converter 1 is supplied to the load 2 via the contact 8 of the relay, and is branched at point a to charge the storage battery 3 via the contact 11 of the relay. .
尚、本発明に使用するダイオード１３は、直列に接続し
た抵抗Ｒ，、Ｒユ として大きい値のものを使用するこ
とにより、蓄電池３を順方向に接続したときも、該ダイ
オード１３に流れる電流を小さく出来るため、小型で、
かつ低価格のもので十分である。Furthermore, by using the diode 13 used in the present invention with a large value as the resistors R, , R connected in series, the current flowing through the diode 13 can be prevented even when the storage battery 3 is connected in the forward direction. Because it can be made small, it is small,
And a low-priced one is sufficient.
ｐｎｐ）ランジスタ１４についても、蓄電池３を順方向
に接続したとき、Ａ Ｃ／Ｄ Ｃ変換器１の直流出力電
圧を、該ｐｎｐ）ランジスタ１４に直列に接続したリレ
ー駆動装置６のコイルの直流抵抗値で割った値の電流が
流れ、小型で、かつ低価格のもので十分である。Regarding the pnp) transistor 14, when the storage battery 3 is connected in the forward direction, the DC output voltage of the A C/DC converter 1 is determined by the DC resistance of the coil of the relay drive device 6 connected in series to the pnp) transistor 14. A small, low-cost device that flows a current equal to the value divided by the value is sufficient.
以上説明のように、本発明による低コストで、かつ小型
の蓄電池逆接続防止回路により、蓄電池の逆接続による
負荷及びＡＣ／ＤＣ変換器の破壊を防ぐことが出来る。As described above, the low cost and small storage battery reverse connection prevention circuit according to the present invention can prevent damage to the load and AC/DC converter due to reverse connection of the storage battery.
第１図は本発明の原理図、
第２図は本発明の実施例の蓄電池逆接続防止回路図、
第３図は従来例の蓄電池逆接続防止回路図である。
図において
１はＡＣ／ＤＣ変換器、
３は蓄電池、
４は逆接続判定回路、
５は切り替え装置、
６．６′ はリレー駆動装置、
７はヒユーズ、
８．１１、はリレーの接点、
９．１３はダイオード、
１０．１２はサーキットブレーカ（ＣＢ）、１４はｐｎ
ｐ）ランジスタ
を示す。
も
本発明の系１１図
第 １図FIG. 1 is a principle diagram of the present invention, FIG. 2 is a circuit diagram for preventing reverse connection of a storage battery according to an embodiment of the present invention, and FIG. 3 is a circuit diagram for preventing reverse connection of a storage battery of a conventional example. In the figure, 1 is an AC/DC converter, 3 is a storage battery, 4 is a reverse connection determination circuit, 5 is a switching device, 6.6' is a relay drive device, 7 is a fuse, 8.11 is a relay contact, 9. 13 is a diode, 10.12 is a circuit breaker (CB), 14 is a pn
p) Shows a transistor. The system of the present invention is also shown in Figure 1.
Claims (1)
電池（３）を接続する端子を有する直流給電システムに
おいて、 該ＡＣ／ＤＣ変換器（１）の出力と該蓄電池（３）を接
続する端子の間に、 該蓄電池（３）を該端子に接続したとき、該蓄電池（３
）の正負の方向を判定して信号を出力する逆接続判定回
路（４）と、 該逆接続の判定信号により制御され、該蓄電池（３）と
負荷（２）及びＡＣ／ＤＣ変換器（１）の接続を断にす
る切り替え装置（５）を設けたことを特徴とする蓄電池
逆接続防止回路。[Claims] In a DC power supply system having a terminal for connecting a storage battery (3) in parallel with a load (2) to the output of an AC/DC converter (1), the output of the AC/DC converter (1) and a terminal connecting the storage battery (3), when the storage battery (3) is connected to the terminal, the storage battery (3) is connected to the terminal.
), and a reverse connection determination circuit (4) that outputs a signal by determining the positive or negative direction of the battery (3), the load (2), and the AC/DC converter (1 ) A storage battery reverse connection prevention circuit characterized in that it is provided with a switching device (5) that disconnects the connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22038686A JPS6377329A (en) | 1986-09-18 | 1986-09-18 | Circuit for a voiding reverse connection of battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22038686A JPS6377329A (en) | 1986-09-18 | 1986-09-18 | Circuit for a voiding reverse connection of battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6377329A true JPS6377329A (en) | 1988-04-07 |
Family
ID=16750307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22038686A Pending JPS6377329A (en) | 1986-09-18 | 1986-09-18 | Circuit for a voiding reverse connection of battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6377329A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06205538A (en) * | 1992-12-28 | 1994-07-22 | Nec Corp | Protecting apparatus for battery erroneously inserted |
-
1986
- 1986-09-18 JP JP22038686A patent/JPS6377329A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06205538A (en) * | 1992-12-28 | 1994-07-22 | Nec Corp | Protecting apparatus for battery erroneously inserted |
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