JP2004343850A - Charging system - Google Patents

Charging system Download PDF

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Publication number
JP2004343850A
JP2004343850A JP2003135570A JP2003135570A JP2004343850A JP 2004343850 A JP2004343850 A JP 2004343850A JP 2003135570 A JP2003135570 A JP 2003135570A JP 2003135570 A JP2003135570 A JP 2003135570A JP 2004343850 A JP2004343850 A JP 2004343850A
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Japan
Prior art keywords
charging
switch
storage battery
current
full
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
JP2003135570A
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Japanese (ja)
Inventor
Kunitoshi Tazume
國利 田爪
Takahisa Masashiro
尊久 正代
Hirotaka Asami
浩隆 浅見
Akihiro Amitani
明弘 網谷
Koji Arai
幸次 新井
Takuya Sudo
卓也 須藤
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.)
Shindengen Electric Manufacturing Co Ltd
Origin Electric Co Ltd
Nippon Telegraph and Telephone Corp
Original Assignee
Shindengen Electric Manufacturing Co Ltd
Origin Electric Co Ltd
Nippon Telegraph and Telephone Corp
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Application filed by Shindengen Electric Manufacturing Co Ltd, Origin Electric Co Ltd, Nippon Telegraph and Telephone Corp filed Critical Shindengen Electric Manufacturing Co Ltd
Priority to JP2003135570A priority Critical patent/JP2004343850A/en
Publication of JP2004343850A publication Critical patent/JP2004343850A/en
Pending legal-status Critical Current

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    • 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

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  • Protection Of Static Devices (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reliable charging system capable of preventing the overcharge of a storage battery. <P>SOLUTION: The charging system comprises a rectifier 1, a charging circuit 20, a switch 27 for connecting an output end of the rectifier 1 to the input end of the charging circuit 20, a switch 6 provided on a path for charging a current from the charging circuit 20 to a storage battery 3, a full charge detecting part 12 for detecting the full charge state of the storage battery 3, a current detector 5 for detecting a charge current of the storage battery 3 and a central control part 11a that controls the switch 27 to be turned off when the full charge detecting part 12 detects the full charge state while controlling the switch 6 to be turned off if the current by the current detector 5 does not come to be zero after the control. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、充電システムに関し、特に、通信用のバックアップシステム等においてニッケル水素電池等の蓄電池の充電を行うための充電システムに関するものである。
【０００２】
【従来の技術】
従来の充電システムの構成例を図３に示す。図中、１は整流器、２は充電器、３は蓄電池、１１ｃは中央制御部、１２は満充電検出部、２０は充電回路、２７はスイッチである。スイッチ２７および充電回路２０は充電器２の構成要素となっている。
【０００３】
整流器１は商用電源に接続し、商用電源からの電力（交流）を整流して直流電力として出力し、その直流電力はスイッチ２７を介して充電回路２０に供給され、充電回路２０は蓄電池３を、例えば０．１ＣＡの充電レートで、定電流で充電する。
【０００４】
満充電検出部１２は蓄電池３の電圧を検出し、温度補正を行った後充電完了したか否かを判断し、充電完了と判断した場合に充電完了信号を出力する。中央制御部１１ｃは満充電検出部１２より充電完了信号を受け取るとスイッチ２７をオフするよう制御する。
【０００５】
【発明が解決しようとする課題】
しかしながら、上記従来の充電システムでは、スイッチ２７が短絡故障した場合に充電を停止することができず、蓄電池３が過充電状態になり、蓄電池３の劣化を促進するばかりか最悪の場合蓄電池３が爆発する危険性すらあるという問題があった。
【０００６】
本発明は、このような問題を解決するためになされたものであり、本発明の目的は、蓄電池の過充電を防ぐことができる高信頼性の充電システムを提供することにある。
【０００７】
【課題を解決するための手段】
上記課題を解決するために、本発明においては、請求項１に記載のように、
整流器と、充電回路と、前記整流器の出力端を前記充電回路の入力端に接続する第１のスイッチと、前記充電回路から蓄電池への充電電流の通路に設けられた第２のスイッチと、前記蓄電池の満充電状態を検出する満充電検出部と、前記蓄電池の充電電流を検出する電流検出器と、前記満充電検出部が満充電状態を検出した場合に前記第１のスイッチをオフするよう制御し、該制御を行った後も前記電流検出器が検出する電流が零とならない場合に前記第２のスイッチをもオフするよう制御する制御部とを有することを特徴とする充電システムを構成する。
【０００８】
また、本発明は、請求項２に記載のように、
半導体スイッチのオンオフ動作によって制御された直流電力により蓄電池を充電する充電器と、前記充電器から前記蓄電池への充電電流の通路に設けられたスイッチと、前記蓄電池の満充電状態を検出する満充電検出部と、前記蓄電池の充電電流を検出する電流検出器とを具備し、前記電流検出器によって検出された充電電流値と前記満充電検出部の出力信号とに基いて前記充電電流の異常の有無を判断し、異常有りと判断した場合に前記スイッチおよび前記半導体スイッチをともにオフするよう制御する制御部を有することを特徴とする充電システムを構成する。
【０００９】
【発明の実施の形態】
以下、図面を参照して本発明の実施の形態例を詳細に説明する。
【００１０】
図１は、本発明の第一の実施形態例の充電システムの構成を示すブロック図である。図中、５は電流検出器、６はスイッチ、１１ａは中央制御部である。なお、前記従来例（図３）と同一箇所には同一の符号を付し重複説明を省略する。請求項１に記載の第１のスイッチ、第２のスイッチおよび制御部は、それぞれ、スイッチ２７、スイッチ６および中央制御部１１ａに該当する。
【００１１】
スイッチ２７は整流器１の出力端を充電回路２０の入力端に接続し、スイッチ６は充電回路２０から蓄電池３への充電電流の通路に設けられ、満充電検出部１２は蓄電池３の満充電状態を検出し、中央制御部１１ａは、満充電検出部１２が満充電状態を検出した場合にスイッチ２７をオフするよう制御し、該制御を行った後も電流検出器５が検出する電流が零とならない場合にスイッチ６をもオフするよう制御する。
【００１２】
本発明の第一の実施形態例の充電システムの動作を、図１を参照しながら以下に説明する。
【００１３】
整流器１は商用電源に接続し、商用電源からの電力（交流）を整流して直流電力として出力し、その直流電力はスイッチ２７を介して充電回路２０に供給され、充電回路２０は蓄電池３を、電流検出器５およびスイッチ６を介して、例えば０．１ＣＡの充電レートで、定電流で充電する。
【００１４】
満充電検出部１２は蓄電池３の電圧を検出し、温度補正を行った後充電完了したか否かを判断し、充電完了と判断した場合に充電完了信号を出力する。中央制御部１１ａは満充電検出部１２より充電完了信号を受け取るとスイッチ２７をオフするよう制御する。
【００１５】
また、万一、前記制御が行われた後も、スイッチ２７が短絡故障してオフとならず、電流検出器５の検出電流が零とならない場合には、中央制御部１１ａは、電流検出器５から、零とならない検出電流の信号を受け、充電電流の異常有りと判断してスイッチ６をもオフするよう制御する。前記充電電流の異常有りとの判断は、スイッチ２７をオフするよう制御した後、スイッチ２７が、常態において、オフ動作をするのに要する時間が経過した時点においても、なお電流検出器５の検出電流が零とならないことに基いて行われる。
【００１６】
以上の動作により、本実施形態例においては、充電完了時にスイッチ２７が短絡故障した場合でも、スイッチ６をオフすることにより蓄電池３の充電を停止することができ、蓄電池３の過充電状態、劣化、あるいは最悪の場合の爆発を未然に防止することができる。
【００１７】
図２は、本発明の第二の実施形態例の充電システムの構成を示すブロック図である。図中、２ａは充電器、１１ｂは中央制御部、２１はダイオード、２２はコンデンサ、２３は半導体スイッチ、２４はリアクトル、２５はＡＮＤ回路、２６はＰＷＭ（ｐｕｌｓｅ ｗｉｄｔｈ ｍｏｄｕｌａｔｉｏｎ）回路である。なお、前記従来例（図３）および前記第一の実施形態例（図１）と同一箇所には同一の符号を付し重複説明を省略する。ダイオード２１、コンデンサ２２、半導体スイッチ２３、リアクトル２４、ＡＮＤ回路２５およびＰＷＭ回路２６は充電器２ａの構成要素となっている。請求項２に記載の制御部は中央制御部１１ｂに該当する。
【００１８】
充電器２ａは、半導体スイッチ２３のオンオフ動作によって制御された直流電力により蓄電池３を充電し、スイッチ６は充電器２ａから蓄電池３への充電電流の通路に設けられ、満充電検出部１２は蓄電池３の満充電状態を検出し、電流検出器５は蓄電池３の充電電流を検出し、中央制御部１１ｂは、電流検出器５によって検出された充電電流値と満充電検出部１２の出力信号とに基いて充電電流の異常の有無を判断し、異常有りと判断した場合にスイッチ６および半導体スイッチ２３をともにオフするよう制御する。
【００１９】
本発明の第二の実施形態例の充電システム動作を、図２を参照しながら以下に説明する。
【００２０】
整流器１は商用電源に接続し、商用電源からの電力（交流）を整流して直流電力として出力し、その直流電力は充電器２ａに供給され、充電器２ａは蓄電池３を、電流検出器５およびスイッチ６を介して、例えば０．１ＣＡの充電レートで、定電流で充電する。ＰＷＭ回路２６の出力に従ってオンオフ動作する半導体スイッチ２３によって制御され、連続パルスとなった直流電力は、ダイオード２１、コンデンサ２２およびリアクトル２４によって構成された平滑回路によって平滑化されて、充電器２ａから出力される。
【００２１】
ＰＷＭ回路２６は、電流検出器５の検出電流とあらかじめ設定しておいた例えば０．１ＣＡの充電レートに対応する充電電流値とを比較して両者が一致するようにＰＷＭ（ｐｕ１ｓｅ ｗｉｄｔｈ ｍｏｄｕ１ａｔｉｏｎ）変調を行い、半導体スイッチ２３の駆動用ＰＷＭ信号を発生する。ＡＮＤ回路２５は、中央制御部１１ｂからのゲートブロック信号ＳｇｂとＰＷＭ回路２６からの駆動用ＰＷＭ信号との論理積をとり半導体スイッチ２３の駆動信号とする。
【００２２】
満充電検出部１２は蓄電池３の電圧を検出し、温度補正を行った後充電完了したか否かを判断し充電完了と判断した場合に充電完了信号を出力する。中央制御部１１ｂは満充電検出部１２より充電完了信号を受け取るとゲートブロック信号Ｓｇｂを「０」とし、その他の場合にはゲートブロック信号Ｓｇｂを「１」とする。
【００２３】
ゲートブロック信号Ｓｇｂが「１」の場合、すなわち、蓄電池３が満充電状態に達していない場合、ＰＷＭ回路２６の出力（駆動用ＰＷＭ信号）がそのまま半導体スイッチ２３に入力され、整流器１からの電流は半導体スイッチ２３のオンオフ動作によって制御され、充電器２ａからは、あらかじめ設定しておいた例えば０．１ＣＡの充電レートに対応する充電電流が蓄電池３に供給される。
【００２４】
ゲートブロック信号Ｓｇｂが「０」の場合、半導体スイッチ２３の駆動信号は「０」となり、半導体スイッチ２３はオフする。
【００２５】
中央制御部１１ｂは、満充電検出部１２より充電完了信号を受け取り、ゲートブロック信号Ｓｇｂを「０」としたにもかかわらず、その後、ＡＮＤ回路２５のスイッチング時間と半導体スイッチ２３のスイッチング時間との合計時間よりも長い時間が経過した時点においても、なお電流検出器５の検出電流が零とならない場合に、充電電流の異常有りと判断し、スイッチ６をオフするよう制御する。
【００２６】
以上の動作により、本実施形態例においては、半導体スイッチ２３が短絡故障した場合でも、スイッチ６をオフすることにより蓄電池３の充電を停止することができ、蓄電池３の過充電状態、劣化、あるいは最悪の場合の爆発を未然に防止することができる。
【００２７】
【発明の効果】
本発明の実施により、蓄電池の過充電を防ぐことができる高信頼性の充電システムを提供することができる。
【図面の簡単な説明】
【図１】本発明の第一の実施形態例の充電システムの構成を示すブロック図である。
【図２】本発明の第二の実施形態例の充電システムの構成を示すブロック図である。
【図３】従来の充電システムの構成例を示すブロック図である。
【符号の説明】
１…整流器、２、２ａ…充電器、３…蓄電池、５…電流検出器、６…スイッチ、１１ａ、１１ｂ、１１ｃ…中央制御部、１２…満充電検出部、２０…充電回路、２１…ダイオード、２２…コンデンサ、２３…半導体スイッチ、２４…リアクトル、２５…ＡＮＤ回路、２６…ＰＷＭ回路、２７…スイッチ。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a charging system, and more particularly to a charging system for charging a storage battery such as a nickel metal hydride battery in a communication backup system or the like.
[0002]
[Prior art]
FIG. 3 shows a configuration example of a conventional charging system. In the figure, 1 is a rectifier, 2 is a charger, 3 is a storage battery, 11c is a central control unit, 12 is a full charge detection unit, 20 is a charging circuit, and 27 is a switch. The switch 27 and the charging circuit 20 are components of the charger 2.
[0003]
The rectifier 1 is connected to a commercial power supply, rectifies electric power (AC) from the commercial power supply and outputs it as DC power, and the DC power is supplied to a charging circuit 20 via a switch 27, and the charging circuit 20 For example, charging is performed at a constant current at a charging rate of 0.1 CA.
[0004]
The full charge detection unit 12 detects the voltage of the storage battery 3, performs temperature correction, determines whether or not charging has been completed, and outputs a charging completion signal when determining that charging has been completed. When receiving the charge completion signal from the full charge detection unit 12, the central control unit 11c controls to turn off the switch 27.
[0005]
[Problems to be solved by the invention]
However, in the above-described conventional charging system, charging cannot be stopped when the switch 27 is short-circuited, and the storage battery 3 is overcharged, not only accelerating the deterioration of the storage battery 3 but also in the worst case, The problem was that there was even a risk of explosion.
[0006]
The present invention has been made to solve such a problem, and an object of the present invention is to provide a highly reliable charging system that can prevent overcharge of a storage battery.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, in the present invention, as described in claim 1,
A rectifier, a charging circuit, a first switch connecting an output terminal of the rectifier to an input terminal of the charging circuit, a second switch provided in a path of a charging current from the charging circuit to a storage battery, A full-charge detector that detects a full-charge state of the storage battery, a current detector that detects a charging current of the storage battery, and the first switch is turned off when the full-charge detector detects the full-charge state. And a control unit for controlling the second switch to be turned off when the current detected by the current detector does not become zero even after performing the control. I do.
[0008]
Further, the present invention provides, as described in claim 2,
A charger for charging a storage battery with DC power controlled by an on / off operation of a semiconductor switch; a switch provided in a path of a charging current from the charger to the storage battery; and a full charge for detecting a full charge state of the storage battery A detection unit, comprising a current detector for detecting a charging current of the storage battery, based on a charging current value detected by the current detector and an output signal of the full charge detection unit, the abnormality of the charging current. A charging system is characterized in that it has a control unit that determines whether or not there is an abnormality and, when it is determined that there is an abnormality, controls to turn off both the switch and the semiconductor switch.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0010]
FIG. 1 is a block diagram illustrating a configuration of a charging system according to a first embodiment of the present invention. In the figure, 5 is a current detector, 6 is a switch, and 11a is a central control unit. The same parts as those in the conventional example (FIG. 3) are denoted by the same reference numerals, and redundant description will be omitted. The first switch, the second switch, and the control unit according to claim 1 correspond to the switch 27, the switch 6, and the central control unit 11a, respectively.
[0011]
The switch 27 connects the output terminal of the rectifier 1 to the input terminal of the charging circuit 20, the switch 6 is provided in the path of the charging current from the charging circuit 20 to the storage battery 3, and the full charge detection unit 12 detects the full charge state of the storage battery 3. The central control unit 11a controls the switch 27 to be turned off when the full charge detection unit 12 detects the full charge state, and the current detected by the current detector 5 is zero even after the control is performed. If not, the switch 6 is controlled to be turned off.
[0012]
The operation of the charging system according to the first embodiment of the present invention will be described below with reference to FIG.
[0013]
The rectifier 1 is connected to a commercial power supply, rectifies electric power (AC) from the commercial power supply and outputs it as DC power, and the DC power is supplied to a charging circuit 20 via a switch 27, and the charging circuit 20 Via the current detector 5 and the switch 6 at a charging rate of, for example, 0.1 CA at a constant current.
[0014]
The full charge detection unit 12 detects the voltage of the storage battery 3, performs temperature correction, determines whether or not charging has been completed, and outputs a charging completion signal when determining that charging has been completed. When receiving the charge completion signal from the full charge detection unit 12, the central control unit 11a controls to turn off the switch 27.
[0015]
If the switch 27 does not turn off due to a short-circuit fault even after the control is performed, and the detection current of the current detector 5 does not become zero, the central control unit 11a 5, a signal of a detection current that does not become zero is received, and it is determined that there is an abnormality in the charging current, and the switch 6 is controlled to be turned off. The determination that there is an abnormality in the charging current is performed by controlling the switch 27 to be turned off and then detecting the current detector 5 even when the time required for the switch 27 to perform the off operation in a normal state has elapsed. This is performed based on the fact that the current does not become zero.
[0016]
By the above operation, in the present embodiment, even when the switch 27 is short-circuited at the time of completion of charging, the charging of the storage battery 3 can be stopped by turning off the switch 6, and the overcharge state of the storage battery 3, deterioration Or, in the worst case, an explosion can be prevented.
[0017]
FIG. 2 is a block diagram showing the configuration of the charging system according to the second embodiment of the present invention. In the figure, 2a is a charger, 11b is a central control unit, 21 is a diode, 22 is a capacitor, 23 is a semiconductor switch, 24 is a reactor, 25 is an AND circuit, and 26 is a PWM (pulse width modulation) circuit. The same parts as those in the conventional example (FIG. 3) and the first embodiment (FIG. 1) are denoted by the same reference numerals, and redundant description will be omitted. The diode 21, the capacitor 22, the semiconductor switch 23, the reactor 24, the AND circuit 25, and the PWM circuit 26 are components of the charger 2a. The control unit described in claim 2 corresponds to the central control unit 11b.
[0018]
The charger 2a charges the storage battery 3 with DC power controlled by the on / off operation of the semiconductor switch 23, the switch 6 is provided in a path of a charging current from the charger 2a to the storage battery 3, and the full charge detection unit 12 is 3, the current detector 5 detects the charging current of the storage battery 3, and the central control unit 11 b determines the charging current value detected by the current detector 5 and the output signal of the full charging detecting unit 12. It is determined whether or not there is an abnormality in the charging current on the basis of the control.
[0019]
The operation of the charging system according to the second embodiment of the present invention will be described below with reference to FIG.
[0020]
The rectifier 1 is connected to a commercial power supply, rectifies electric power (AC) from the commercial power supply, and outputs the rectified DC power. The DC power is supplied to a charger 2a. And via the switch 6 at a constant current, for example, at a charging rate of 0.1 CA. The DC power that is controlled by the semiconductor switch 23 that is turned on and off in accordance with the output of the PWM circuit 26 and that has become a continuous pulse is smoothed by a smoothing circuit including the diode 21, the capacitor 22, and the reactor 24, and output from the charger 2a. Is done.
[0021]
The PWM circuit 26 compares a detection current of the current detector 5 with a preset charging current value corresponding to a charging rate of, for example, 0.1 CA, and performs PWM (pu1 width modulation) modulation so that the two coincide with each other. And generates a PWM signal for driving the semiconductor switch 23. The AND circuit 25 obtains the logical product of the gate block signal Sgb from the central control unit 11b and the driving PWM signal from the PWM circuit 26 to obtain a driving signal for the semiconductor switch 23.
[0022]
The full charge detection unit 12 detects the voltage of the storage battery 3, performs temperature correction, determines whether or not charging is completed, and outputs a charging completion signal when it is determined that charging is completed. When receiving the charge completion signal from the full charge detection unit 12, the central control unit 11b sets the gate block signal Sgb to "0", and otherwise sets the gate block signal Sgb to "1".
[0023]
When the gate block signal Sgb is “1”, that is, when the storage battery 3 has not reached the fully charged state, the output (the driving PWM signal) of the PWM circuit 26 is directly input to the semiconductor switch 23 and the current from the rectifier 1 Is controlled by the on / off operation of the semiconductor switch 23, and a charging current corresponding to a preset charging rate of, for example, 0.1 CA is supplied to the storage battery 3 from the charger 2a.
[0024]
When the gate block signal Sgb is “0”, the drive signal of the semiconductor switch 23 becomes “0”, and the semiconductor switch 23 is turned off.
[0025]
The central control unit 11b receives the charge completion signal from the full charge detection unit 12, and sets the gate block signal Sgb to “0”, but thereafter, determines the switching time of the AND circuit 25 and the switching time of the semiconductor switch 23. If the current detected by the current detector 5 does not become zero even after a lapse of time longer than the total time, it is determined that the charging current is abnormal, and the switch 6 is controlled to be turned off.
[0026]
By the above operation, in the present embodiment, even when the semiconductor switch 23 has a short-circuit fault, the charging of the storage battery 3 can be stopped by turning off the switch 6, and the storage battery 3 is overcharged, deteriorated, or The worst case explosion can be prevented beforehand.
[0027]
【The invention's effect】
By implementing the present invention, a highly reliable charging system that can prevent overcharge of a storage battery can be provided.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a configuration of a charging system according to a first embodiment of the present invention.
FIG. 2 is a block diagram illustrating a configuration of a charging system according to a second embodiment of the present invention.
FIG. 3 is a block diagram illustrating a configuration example of a conventional charging system.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 rectifier, 2 2a charger, 3 storage battery, 5 current detector, 6 switch, 11a, 11b, 11c central control unit, 12 full charge detection unit, 20 charging circuit, 21 diode , 22 ... capacitor, 23 ... semiconductor switch, 24 ... reactor, 25 ... AND circuit, 26 ... PWM circuit, 27 ... switch.

Claims (2)

整流器と、充電回路と、前記整流器の出力端を前記充電回路の入力端に接続する第１のスイッチと、前記充電回路から蓄電池への充電電流の通路に設けられた第２のスイッチと、前記蓄電池の満充電状態を検出する満充電検出部と、前記蓄電池の充電電流を検出する電流検出器と、前記満充電検出部が満充電状態を検出した場合に前記第１のスイッチをオフするよう制御し、該制御を行った後も前記電流検出器が検出する電流が零とならない場合に前記第２のスイッチをもオフするよう制御する制御部とを有することを特徴とする充電システム。A rectifier, a charging circuit, a first switch connecting an output terminal of the rectifier to an input terminal of the charging circuit, a second switch provided in a path of a charging current from the charging circuit to a storage battery, A full-charge detector that detects a full-charge state of the storage battery; a current detector that detects a charging current of the storage battery; and a first switch that turns off the first switch when the full-charge detector detects the full-charge state. And a control unit configured to control the second switch to be turned off when the current detected by the current detector does not become zero even after the control is performed. 半導体スイッチのオンオフ動作によって制御された直流電力により蓄電池を充電する充電器と、前記充電器から前記蓄電池への充電電流の通路に設けられたスイッチと、前記蓄電池の満充電状態を検出する満充電検出部と、前記蓄電池の充電電流を検出する電流検出器とを具備し、前記電流検出器によって検出された充電電流値と前記満充電検出部の出力信号とに基いて前記充電電流の異常の有無を判断し、異常有りと判断した場合に前記スイッチおよび前記半導体スイッチをともにオフするよう制御する制御部を有することを特徴とする充電システム。A charger for charging the storage battery with DC power controlled by the on / off operation of the semiconductor switch, a switch provided in a path of a charging current from the charger to the storage battery, and a full charge for detecting a full charge state of the storage battery A detection unit, comprising a current detector for detecting a charging current of the storage battery, based on the charging current value detected by the current detector and the output signal of the full charge detection unit, the abnormality of the charging current A charging system comprising: a control unit configured to determine presence / absence, and to turn off both the switch and the semiconductor switch when it is determined that there is an abnormality.
JP2003135570A 2003-05-14 2003-05-14 Charging system Pending JP2004343850A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011097741A (en) * 2009-10-29 2011-05-12 Hitachi Koki Co Ltd Charging device
WO2013086411A1 (en) * 2011-12-09 2013-06-13 The Aes Corporation Frequency responsive charge sustaining control of electricity storage systems for ancillary services on an electrical power grid
JP2013132132A (en) * 2011-12-21 2013-07-04 Toshiba Mitsubishi-Electric Industrial System Corp Uninterruptible power supply device
JP2014064459A (en) * 2013-11-18 2014-04-10 Mitsumi Electric Co Ltd Protection circuit and battery pack
JP5652562B1 (en) * 2013-09-19 2015-01-14 株式会社豊田自動織機 MOSFET switch element abnormality diagnosis apparatus and method

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011097741A (en) * 2009-10-29 2011-05-12 Hitachi Koki Co Ltd Charging device
US8841880B2 (en) 2009-10-29 2014-09-23 Hitachi Koki Co., Ltd. Battery charger with charge abnormality checking function
WO2013086411A1 (en) * 2011-12-09 2013-06-13 The Aes Corporation Frequency responsive charge sustaining control of electricity storage systems for ancillary services on an electrical power grid
US10886742B2 (en) 2011-12-09 2021-01-05 The Aes Corporation Method and system for performance management of an energy storage device
JP2013132132A (en) * 2011-12-21 2013-07-04 Toshiba Mitsubishi-Electric Industrial System Corp Uninterruptible power supply device
JP5652562B1 (en) * 2013-09-19 2015-01-14 株式会社豊田自動織機 MOSFET switch element abnormality diagnosis apparatus and method
WO2015040923A1 (en) * 2013-09-19 2015-03-26 株式会社豊田自動織機 Anomaly detector in mosfet switching element and method for detecting anomaly
US9766292B2 (en) 2013-09-19 2017-09-19 Kabushiki Kaisha Toyota Jidoshokki Abnormality diagnostic device and abnormality diagnostic method for MOSFET switch element
JP2014064459A (en) * 2013-11-18 2014-04-10 Mitsumi Electric Co Ltd Protection circuit and battery pack

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