JPH0217829A - Charger - Google Patents

Charger

Info

Publication number
JPH0217829A
JPH0217829A JP16695288A JP16695288A JPH0217829A JP H0217829 A JPH0217829 A JP H0217829A JP 16695288 A JP16695288 A JP 16695288A JP 16695288 A JP16695288 A JP 16695288A JP H0217829 A JPH0217829 A JP H0217829A
Authority
JP
Japan
Prior art keywords
voltage
storage battery
circuit
battery
charging
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
Application number
JP16695288A
Other languages
Japanese (ja)
Inventor
Rei Sasaki
玲 佐々木
Yasuo Shimizu
安雄 清水
Mitsuji Matsushita
松下 満次
Tetsuya Saito
哲也 齊藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP16695288A priority Critical patent/JPH0217829A/en
Publication of JPH0217829A publication Critical patent/JPH0217829A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To make it possible to charge sufficiently by connecting a battery to a load circuit to discharge when the voltage of the battery is higher than a specific voltage in case of commencement of charging operation and connecting the battery to a charging circuit when the voltage of the battery is lower than a specific voltage. CONSTITUTION:After connecting a battery to connection terminals 1 and 2, a switch 23 is pushed down to start the charging operation. At that time, when an applied voltage V0 of + input of a comparator 11 is higher than discharge terminating voltage V1, an output signal S of the comparator 11 attains a high level, so that the battery is connected to load resistor 30a through a relay 28 to discharge. During the battery discharge, when the voltage of the battery is under the discharge terminating voltage V1, the output signal S of the comparator 11 attain a low level, and the battery is connected to a charging circuit 40 to charge. According to the constitution, when a battery to be activated by discharge does not activate, the battery is discharged once to activate, and sufficient charge can be made.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は蓄電池、特にニッケルーカドミウム蓄電池等の
放電させることにより活性化されるタイプの蓄電池を効
率よく充電可能な充電器に関するものである。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a charger that can efficiently charge a storage battery, particularly a type of storage battery that is activated by discharging, such as a nickel-cadmium storage battery.

(従来の技術) 従来の充電器は、該充電器に充電対象となる蓄電池を接
続して充電動作を開始させると、直ちに電池容量の不足
分の充電を行うというものであった。
(Prior Art) In a conventional charger, when a storage battery to be charged is connected to the charger and a charging operation is started, the battery immediately charges the battery to compensate for the insufficient capacity.

(発明が解決しようとする課題) しかしながら、長期保存等により不活性化したニッケル
ーカドミウム蓄電池を充電する場合、該ニッケルーカド
ミウム蓄電池の内部の活物質の結晶の表面積が小さくな
り、該ニッケルーカドミウム蓄電池の全体容量が減少し
ているため、従来の充電器では、充分な充電を行うこと
ができないという問題点があった。
(Problem to be Solved by the Invention) However, when charging a nickel-cadmium storage battery that has been inactivated due to long-term storage, the surface area of the active material crystal inside the nickel-cadmium storage battery becomes smaller, and the nickel-cadmium Since the overall capacity of storage batteries has decreased, there has been a problem in that conventional chargers cannot perform sufficient charging.

本発明の目的は上記問題点に鑑み、ニッケルーカドミウ
ム蓄電池等の放電させることにより活性化されるタイプ
の蓄電池が不活性化している場合、該蓄電池を一度放電
させることにより、活物質を全て放電状態にし、活性化
させた後に充電を行う充電器を提供することにある。
In view of the above-mentioned problems, an object of the present invention is to discharge all of the active material by discharging the storage battery once, when the storage battery of the type that is activated by discharging, such as a nickel-cadmium storage battery, is inactivated. To provide a charger that performs charging after activation.

(課題を解決するための手段) 本発明は上記の目的を達成するために、充電対象となる
蓄電池を充電するための充電回路を備えた充電器におい
て、前記蓄電池を放電させるための負荷回路と、前記蓄
電池の電圧が所定の電圧以下であることを検出する電圧
監視回路と、該電圧監視回路の検出結果に基づき、充電
動作開始時に前記蓄電池の電圧が前記所定の電圧より高
いときは該蓄電池を前記負荷回路に接続し、前記充電動
作開始時以後前記蓄電池の電圧が前記所定の電圧以下に
なったときに該蓄電池を前記充電回路に接続する充放電
切替え回路とを設けた。
(Means for Solving the Problems) In order to achieve the above object, the present invention provides a charger equipped with a charging circuit for charging a storage battery to be charged, and a load circuit for discharging the storage battery. a voltage monitoring circuit that detects that the voltage of the storage battery is below a predetermined voltage; and a voltage monitoring circuit that detects that the voltage of the storage battery is lower than or equal to a predetermined voltage; is connected to the load circuit, and connects the storage battery to the charging circuit when the voltage of the storage battery becomes equal to or lower than the predetermined voltage after the start of the charging operation.

(作 用) 本発明によれば、電圧監視回路により充電対象となる蓄
電池の電圧が所定の電圧以下であることが検出される。
(Function) According to the present invention, the voltage monitoring circuit detects that the voltage of the storage battery to be charged is below a predetermined voltage.

また、充放電切替え回路により、前′記電圧監視回路の
検出結果に基づざ、充電動作開始時に前記蓄電池の電圧
が前記所定の電圧より高いときは、該蓄電池は負荷回路
に接続されて放電され、放電することにより活性化され
るタイプの蓄電池の場合は、該蓄電池の活物質が・全て
放電状態にされる。更に前記充電動作開始時以後に前記
蓄電池の電圧が前記所定の電圧以下になったときに該蓄
電池は充電回路に接続されて充電される。
Further, the charge/discharge switching circuit determines, based on the detection result of the voltage monitoring circuit, that when the voltage of the storage battery is higher than the predetermined voltage at the start of charging operation, the storage battery is connected to the load circuit and discharged. In the case of a type of storage battery that is activated by discharge, all of the active material of the storage battery is brought into a discharged state. Further, when the voltage of the storage battery becomes lower than the predetermined voltage after the start of the charging operation, the storage battery is connected to a charging circuit and charged.

(実施例) 第1図は本発明の一実施例を示す回路図である。(Example) FIG. 1 is a circuit diagram showing an embodiment of the present invention.

図において、1及び2は接続端子で、該接続端子1に充
電対象となるニッケルカドミウム蓄電池(以下、蓄電池
と称す)の正極を接続し、接続端子2に負極を接続する
。3はヒユーズ、10は電圧監視回路、20は充放電切
替え回路、30は負荷回路、40は充電回路である。
In the figure, reference numerals 1 and 2 are connecting terminals, to which the positive electrode of a nickel cadmium storage battery (hereinafter referred to as a storage battery) to be charged is connected, and to the connecting terminal 2 a negative electrode is connected. 3 is a fuse, 10 is a voltage monitoring circuit, 20 is a charging/discharging switching circuit, 30 is a load circuit, and 40 is a charging circuit.

前記電圧監視回路10はコンパレータ11と抵抗器12
.13とから構成され、該コンパレータ11の十人力は
前記ヒユーズ3を介して前記接続端子1に接続されてい
る。該コンパレータ11の一人力には前記抵抗器12.
13により図示せぬ電源VDの電圧を分圧した電圧v1
が印加されている。該電圧■1は充電対象となる蓄電池
が過放電状態になる前の放電終期電圧の値に設定されて
いる。前記コンパレータ11の出力信号Sは、該コンパ
レータ11の十人力の電圧が前記−人力に印加されてい
る電圧v1以下のときローレベルになる。
The voltage monitoring circuit 10 includes a comparator 11 and a resistor 12.
.. 13, and the terminal of the comparator 11 is connected to the connection terminal 1 via the fuse 3. The comparator 11 is connected to the resistor 12.
13, the voltage v1 obtained by dividing the voltage of the power supply VD (not shown)
is applied. The voltage (1) is set to the end-of-discharge voltage before the storage battery to be charged becomes over-discharged. The output signal S of the comparator 11 becomes low level when the voltage of the comparator 11 is lower than the voltage v1 applied to the -human power.

前記充放電切替え回路20は、否定論理積(以下NAN
Dと称す)回路21,22、モーメンタリの押しボタン
スイッチ23、論理和(以下ORと称す)回路24、ス
イッチ25、抵抗器26、NPN型トランジスタ27及
びリレー28により構成される。前記NAND回路21
.22はR−Sフリップフロップを形成し、該R−Sフ
リップフロップのセット信号としてNAND回路21に
前記コンパレータ11の出力信号Sが入力されている。
The charging/discharging switching circuit 20 operates using a negative logical product (hereinafter NAN).
It is composed of circuits 21 and 22 (referred to as D), a momentary pushbutton switch 23, a logical sum (hereinafter referred to as OR) circuit 24, a switch 25, a resistor 26, an NPN transistor 27, and a relay 28. The NAND circuit 21
.. 22 forms an R-S flip-flop, and the output signal S of the comparator 11 is input to the NAND circuit 21 as a set signal for the R-S flip-flop.

前記NAND回路22のリセット入力は前記スイッチ2
3を介して接地されている。前記NAND回路21の出
力信号Qは前記OR回路24の一方の入力端子に入力さ
れ、該OR回路24の他方の入力端子は前記スイッチ2
5を介して接地されている。該OR回路24の出力端子
は前記抵抗器26を介して前記トランジスタ27のベー
スに接続され、該トランジスタ27のエミッタは接地さ
れ、コレクタは前記リレー28を介して図示せぬ電源V
Dに接続されている。前記リレー28の接片は前記ヒユ
ーズ3を介して接続端子1に接続され、常開接点は前記
充電回路4oの出力端子に接続されている。
The reset input of the NAND circuit 22 is connected to the switch 2.
It is grounded via 3. The output signal Q of the NAND circuit 21 is input to one input terminal of the OR circuit 24, and the other input terminal of the OR circuit 24 is input to the switch 2.
It is grounded via 5. The output terminal of the OR circuit 24 is connected to the base of the transistor 27 via the resistor 26, the emitter of the transistor 27 is grounded, and the collector is connected to the power supply V (not shown) via the relay 28.
Connected to D. A contact piece of the relay 28 is connected to the connection terminal 1 via the fuse 3, and a normally open contact is connected to the output terminal of the charging circuit 4o.

前記負荷回路30は負荷抵抗器30aからなり、該負荷
抵抗器30aの一端側は接地され、他端側は前記リレー
28の常閉接点に接続されている。
The load circuit 30 includes a load resistor 30a, one end of which is grounded, and the other end connected to the normally closed contact of the relay 28.

前記スイッチ25をオフにして前記OR回路24の人力
を接地すると、該OR回路24の他方の入力にかかわら
ずOR回路24の出力信号はハイレベルになり、トラン
ジスタ27がオンになる。
When the switch 25 is turned off and the human power of the OR circuit 24 is grounded, the output signal of the OR circuit 24 becomes high level regardless of the other input of the OR circuit 24, and the transistor 27 is turned on.

これにより、リレー28゛の接片は常開接点に接続され
、充電対象の蓄電池は充電回路4oに接続される。該ス
イッチ25は蓄電池の放電を行う必要がない場合にオフ
に設定するものであり、通常はオンに設定しである。
As a result, the contact piece of the relay 28' is connected to the normally open contact, and the storage battery to be charged is connected to the charging circuit 4o. The switch 25 is set to OFF when there is no need to discharge the storage battery, and is normally set to ON.

次に本実施例の動作を説明する。Next, the operation of this embodiment will be explained.

前記充電対象となる蓄電池を接続端子1,2に接続した
後、前記スイッチ23を押下して充電動作を開始させる
。このとき前記コンパレータ11の十人力の印加電圧V
Oが前記放電終期電圧Vlより高い場合、前記コンパレ
ータ11の出力信号Sはハイレベルであるから、前記ス
イッチ23を押下することにより前記R−Sフリップフ
ロップはリセットされて、NAND回路21の出力信号
Qはローレベルになる。また、前記OR回路24は該信
号Qを入力して、該OR回路24の出力信号はローレベ
ルになり、更にトランジスタ27がオフになる。これに
より、前記蓄電池は前記リレー28を介して前記負荷抵
抗30aに接続されて放電する。該蓄電池の放電が進行
し該蓄電池の電圧が前記放電終期電圧Vl以下になると
、前記コンパレータ11の出力信号Sはローレベルにな
り、前記R−SフリップフロップがセットされてNAN
D回路21の出力信号Qはハイレベルになる。
After connecting the storage battery to be charged to the connection terminals 1 and 2, the switch 23 is pressed to start the charging operation. At this time, the applied voltage V of the comparator 11 is
When O is higher than the end-of-discharge voltage Vl, the output signal S of the comparator 11 is at a high level, so the R-S flip-flop is reset by pressing the switch 23, and the output signal of the NAND circuit 21 Q becomes low level. Further, the signal Q is input to the OR circuit 24, and the output signal of the OR circuit 24 becomes low level, and furthermore, the transistor 27 is turned off. Thereby, the storage battery is connected to the load resistor 30a via the relay 28 and discharged. When the discharge of the storage battery progresses and the voltage of the storage battery becomes equal to or lower than the final discharge voltage Vl, the output signal S of the comparator 11 becomes low level, and the R-S flip-flop is set to
The output signal Q of the D circuit 21 becomes high level.

これにより、前記OR回路24の出力信号はハイレベル
になり、トランジスタ27がオンになると共に、リレー
28に通電されて、リレー28の接片は常開接点に接続
される。これにより、前記蓄電池は充電回路40に接続
されて充電される。前記スイッチ23が再度押下される
まで、蓄電池は充7IS回路40に接続されている。
As a result, the output signal of the OR circuit 24 becomes high level, the transistor 27 is turned on, the relay 28 is energized, and the contact piece of the relay 28 is connected to a normally open contact. Thereby, the storage battery is connected to the charging circuit 40 and charged. The storage battery is connected to the charging IS circuit 40 until the switch 23 is pressed again.

また、前記蓄電池の電圧が前記放電終期電圧V1より低
い状態で充電を行うときは、前記スイッチ23を押下し
て充電動作を開始させた後に、−度該蓄電池は前記負荷
抵抗30aに接続される。
Further, when charging is performed when the voltage of the storage battery is lower than the end-of-discharge voltage V1, after pressing the switch 23 to start the charging operation, the storage battery is connected to the load resistor 30a. .

これにより、前記電圧監視回路10により該蓄電池の電
圧が検出され、前記コンパレータ11の出力信号Sがロ
ーレベルになり、前記R−Sフリップフロップがセット
されることにより該蓄電池は充電回路40に接続されて
充電される。
As a result, the voltage of the storage battery is detected by the voltage monitoring circuit 10, the output signal S of the comparator 11 becomes low level, and the R-S flip-flop is set, thereby connecting the storage battery to the charging circuit 40. and charged.

尚、本実施例では前記OR回路24とスイッチ25によ
り、充電対象となる蓄電池を放電させずに充電のみを行
えるようにしたが、1回路2接点スイッチを用いて前記
接続端子1を充電回路40に接続するようにしても良い
In this embodiment, the OR circuit 24 and the switch 25 are used so that the storage battery to be charged can only be charged without being discharged. You may also connect it to

(発明の効果) 以上説明したように本発明によれば、充電対象となる蓄
電池を充電するための充電回路を備えた充電器において
、前記蓄電池を放電させるための負荷回路と、前記蓄電
池の電圧が所定の電圧以下であることを検出する電圧監
視回路と、該電圧監視回路の検出結果に゛基づき、充電
動作開始時に前記蓄電池の電圧が前記所定の電圧より高
いときは該蓄電池を前記負荷回路に接続し、前記充電動
作開始時以後前記蓄電池の電圧が前記所定の電圧以下に
なったときに該蓄電池を前記充電回路に接続する充放電
切替え回路とを設けたので、ニッケルーカドミウム蓄電
池等の放電させることにより活性化されるタイプの蓄電
池が不活性化している場合には、該蓄電池を一度放電さ
せて活性化し、内部抵抗を低下させた後に充電を行うこ
とができるため、十分な充電を行うことが可能になる。
(Effects of the Invention) As explained above, according to the present invention, in a charger equipped with a charging circuit for charging a storage battery to be charged, a load circuit for discharging the storage battery and a voltage of the storage battery are provided. a voltage monitoring circuit that detects that the storage battery is lower than a predetermined voltage; and based on the detection result of the voltage monitoring circuit, when the voltage of the storage battery is higher than the predetermined voltage at the start of charging operation, the storage battery is connected to the load circuit. and a charge/discharge switching circuit that connects the storage battery to the charging circuit when the voltage of the storage battery becomes lower than the predetermined voltage after the start of the charging operation. If a type of storage battery that is activated by discharging is inactivated, the storage battery can be discharged once, activated, and then charged after lowering the internal resistance, so that sufficient charging can be performed. It becomes possible to do so.

また、ニッケルーカドミウム蓄電池を複数個組み合わせ
た蓄電池を充電する場合にも、−度放電させることによ
り、個々の蓄電池の残存容量を均一にすることができる
ため、十分な充電を行うことが可能になる。
In addition, when charging a storage battery that is a combination of multiple nickel-cadmium storage batteries, by discharging it several times, it is possible to equalize the remaining capacity of each storage battery, making it possible to perform sufficient charging. Become.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明の一実施例を示す回路図である。 1.2・・・接続端子、3・・・ヒユーズ、10・・・
電圧監視回路、20・・・充放電切替え回路、3o・・
・負荷回路、40・・・充電回路。 特許出願人  沖電気工業株式会社 代理人 弁理士  吉 1)精 孝
FIG. 1 is a circuit diagram showing an embodiment of the present invention. 1.2... Connection terminal, 3... Fuse, 10...
Voltage monitoring circuit, 20... Charge/discharge switching circuit, 3o...
- Load circuit, 40... charging circuit. Patent Applicant Oki Electric Industry Co., Ltd. Agent Patent Attorney Yoshi 1) Takashi Sei

Claims (1)

【特許請求の範囲】 充電対象となる蓄電池を充電するための充電回路を備え
た充電器において、 前記蓄電池を放電させるための負荷回路と、前記蓄電池
の電圧が所定の電圧以下であることを検出する電圧監視
回路と、 該電圧監視回路の検出結果に基づき、充電動作開始時に
前記蓄電池の電圧が前記所定の電圧より高いときは該蓄
電池を前記負荷回路に接続し、前記充電動作開始時以後
前記蓄電池の電圧が前記所定の電圧以下になったときに
該蓄電池を前記充電回路に接続する充放電切替え回路と
を設けたことを特徴とする充電器。
[Scope of Claims] A charger equipped with a charging circuit for charging a storage battery to be charged, comprising: a load circuit for discharging the storage battery; and detecting that the voltage of the storage battery is below a predetermined voltage. a voltage monitoring circuit that connects the storage battery to the load circuit when the voltage of the storage battery is higher than the predetermined voltage at the start of charging operation based on the detection result of the voltage monitoring circuit; A charger comprising: a charge/discharge switching circuit that connects the storage battery to the charging circuit when the voltage of the storage battery becomes equal to or lower than the predetermined voltage.
JP16695288A 1988-07-06 1988-07-06 Charger Pending JPH0217829A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16695288A JPH0217829A (en) 1988-07-06 1988-07-06 Charger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16695288A JPH0217829A (en) 1988-07-06 1988-07-06 Charger

Publications (1)

Publication Number Publication Date
JPH0217829A true JPH0217829A (en) 1990-01-22

Family

ID=15840666

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16695288A Pending JPH0217829A (en) 1988-07-06 1988-07-06 Charger

Country Status (1)

Country Link
JP (1) JPH0217829A (en)

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