JP4349773B2 - Backup power supply device for implementing the battery charging method and the charging method - Google Patents

Backup power supply device for implementing the battery charging method and the charging method Download PDF

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JP4349773B2
JP4349773B2 JP2002109925A JP2002109925A JP4349773B2 JP 4349773 B2 JP4349773 B2 JP 4349773B2 JP 2002109925 A JP2002109925 A JP 2002109925A JP 2002109925 A JP2002109925 A JP 2002109925A JP 4349773 B2 JP4349773 B2 JP 4349773B2
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battery
current value
charging
dc
ac
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JP2003309933A (en )
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玲彦 叶田
隆雄 後藤
峰弘 根本
昌弘 濱荻
節 田邉
史一 高橋
芳秀 高橋
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日立コンピュータ機器株式会社
株式会社日立製作所
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage
    • Y02E60/12Battery technologies with an indirect contribution to GHG emissions mitigation

Description

【0001】 [0001]
【産業上の利用分野】 BACKGROUND OF THE INVENTION
本発明は、電源装置における無停電を行うためのバッテリへのバッテリ充電方法及び、該充電方法を実施するバックアップ電源装置に係り、特にAC/DC変換部に負荷を与えずに好適にバッテリ充電を行うことができるバッテリ充電方法及び該充電方法を実施するバックアップ電源装置に関する。 The present invention is a battery charging method and to a battery for performing uninterruptible in the power supply device, relates to a backup power supply device for implementing the said charging process, a particularly suitable battery charging without causing load on the AC / DC converter unit It relates backup power supply device for implementing the battery charging method and the charging process can be performed.
【0002】 [0002]
【従来の技術】 BACKGROUND OF THE INVENTION
一般にコンピュータシステムにおける周辺装置は、定電源を確保するための電源装置と停電時に対応するための無停電装置(UPS)が接続されている。 Generally peripheral devices in the computer system, the uninterruptible apparatus for meeting the power failure and power supply to ensure constant power supply (UPS) is connected. この従来技術による電源システムは、図2に示す如く、交流電源200から電流Iin及び電圧Vinから成る電力を入力としてバッテリ充電を行う無停電装置500と、該無停電装置500からの交流電圧を直流電圧に変換して負荷装置300に出力する電源装置100とから構成され、前記無停電装置500は、入力電圧VinをAC/DC変換部1により直流電圧に変換し、電圧V をDC/AC変換部2により交流に戻してから次段の電源装置100に供給すると共に電流I を充放電回路3を介してバッテリ4に充電するものであり、電源装置100は、無停電装置500からの交流電圧をAC/DC変換部101により直流に変換し、更にDC/DC変換部102により所定電圧の直流電流を負荷装置300に供給する様に構成され、 The power supply system according to the prior art, as shown in FIG. 2, a DC uninterruptible apparatus 500 for performing the battery charging power consisting of current Iin and a voltage Vin from the AC power source 200 as an input, the AC voltage from the wireless power failure unit 500 is composed from the power supply 100 for outputting by converting the voltage to a load device 300, the uninterruptible power supply unit 500 converts a DC voltage to input voltage Vin by AC / DC converter unit 1, the voltage V 1 DC / AC is intended to charge the electric current I 2 to the battery 4 via the charging and discharging circuit 3 is supplied by the converter 2 from the back to the AC to the next stage of the power supply device 100, the power supply device 100, from the uninterruptible device 500 converts the AC voltage into a DC by AC / DC converter 101 is configured so as to further supplied to the load device 300 a direct current of a predetermined voltage by the DC / DC converter 102, 放電回路3がAC/DC変換部1の出力から指定されたワット数の電力をバッテリ4に充電する様に構成されている。 Discharge circuit 3 is configured wattage power specified from the output of the AC / DC converter unit 1 so as to charge the battery 4.
【0003】 [0003]
【発明が解決しようとする課題】 [Problems that the Invention is to Solve
この様に構成された電源システムは、負荷装置300の必要とする電力によって電流値が変化するため、AC/DC変換部及びDC/DC変換部の容量を、負荷装置の必要とする電流に応じて大容量に設計する必要があると言う不具合があった。 Power system configured in this manner, in order to change the current value by the electric power required by the load device 300, according to the capacity of the AC / DC converter unit and the DC / DC converter unit, the current required for the load device It needs to be designed in large capacity there is a problem to say that there is Te. 例えば負荷装置が複数の磁気ディスク装置が接続された場合は、磁気ディスク装置の電源投入時の起動電流や装置立ち上がり時の突入電流が大きく、これら起動電流等に対応することができる大容量に設計しなければならなかった。 For example, when the load device is a plurality of magnetic disk devices are connected, the starting current and device is large inrush current at the rise of the power-on of the magnetic disk device, designed for large capacity can accommodate these starting current, etc. It had to be.
【0004】 [0004]
更に従来システムは、バッテリの充電特性をワット数で指定しているため、入力電圧が変動した場合や負荷装置の電力が変動した場合は、充電電流も変化し、例えば充電電流が微少な場合は充電時間が冗長になりバッテリの回復が遅くなり、逆に充電電流が過大な場合は過充電になり、危険な状態になると言う不具合が有った。 Further prior art systems, because it specifies the charging characteristics of the battery in watts, when the power or when the load device input voltage varies is changed also changes the charging current, for example, when the charging current is small is charging time slows down the recovery of the battery would be redundant, if reverse charging current is excessive become overcharged, trouble was there to say to be a dangerous state.
【0005】 [0005]
更に従来システムは、例えばバッテリの消耗が多く、急速に充電しなければならない場合でも、指定されたワット数で充電を行うために充電時間が冗長になると言う不具合があった。 Further prior art systems, for example, consumption of the battery is large and even if you have to rapidly charge, charging time for charging with the specified wattage there is a problem called become redundant.
【0006】 [0006]
本発明の目的は、前述の従来技術による不具合を除去することであり、バッテリへの充電電流をバッテリの消耗度合いに応じて一定に保つことができるバッテリ充電方法及び該充電方法を実施するバックアップ電源装置を提供することである。 An object of the present invention is to eliminate problems caused by the prior art described above, the backup implementing the battery charging method and the charging method which can maintain the charging current to the battery at a constant depending on the exhaustion degree of the battery power supply it is to provide an apparatus.
【0007】 [0007]
【課題を解決するための手段】 In order to solve the problems]
前記目的を達成するために本発明は、交流電圧を直流電圧に変換するAC/DC変換部と、該AC/DC変換部から出力された直流電圧を所定値の電圧に変換し、負荷容量が変化する負荷装置に出力するDC/DC変換部と、前記AC/DC変換部から電流を取り込んで充電を行うニッケル水素電池からなるバッテリとを備えるバックアップ電源装置のバッテリ充電方法であって、 To accomplish the above object, the AC / DC converter for converting an AC voltage into a DC voltage, converts the DC voltage outputted from the AC / DC converting unit into a voltage of a predetermined value, the load capacitance a DC / DC converter for outputting the varying load device, a battery charging method of the backup power supply device and a battery composed of a nickel-metal hydride battery for charging takes in current from the AC / DC conversion unit,
前記AC/DC変換部の限界電流値と、バッテリに対する急速充電モード時のバッテリ充電電流値又は低速充電モード時のバッテリ充電電流値とを設定し、 The set and limiting current of the AC / DC conversion unit, and a battery charging current value of the battery charging current value or slow charge mode during fast charge mode of the battery,
前記DC/DC変換部の電流値を検出し、前記限界電流値からDC/DC変換部からの電流値を減算したバッテリ充電可能な充電可能電流値と前記設定されたバッテリ充電電流値を比較し、 Wherein detecting a current value of the DC / DC converter unit, comparing the limit current value battery rechargeable chargeable current value and the set battery charge current value of the current value obtained by subtracting from the DC / DC converter unit from ,
前記バッテリ充電可能な充電可能電流値又はバッテリ充電電流値のうちの低電流値に応じて半導体素子のスイッチング制御を行い、 Performs switching control of the semiconductor device in accordance with the low current value of the battery charge can be chargeable current or battery charging current value,
前記AC/DC変換部の限界電流値は、前記負荷装置の最大容量に前記バッテリに対する低速充電モード時のバッテリ充電電流値を加算した値以上に設定して、急速充電モード時に前記急速充電モード時のバッテリ充電電流値と前記充電可能電流値を比較して前記急速充電モード時のバッテリ充電電流値の方が低い場合には前記急速充電モード時のバッテリ充電電流値によって、前記充電可能電流値の方が低い場合には前記充電可能電流値によって、また、低速充電モード時には前記低速充電モード時のバッテリ充電電流値によって、バッテリ充電を行うことを第1の特徴とする。 The limiting current value of the AC / DC converter unit, the set value or more obtained by adding the battery charging current value during the low-speed charging mode for the battery to the maximum capacity of the load device, the quick charge mode in rapid charging mode said the quick charge mode of the battery charging current value when the battery charging current value and the lower of said comparing chargeable current value the quick charge mode of the battery charging current value, of the chargeable current value by it is the chargeable current value if it is lower, also the slow charging mode by the battery charging current value during the low-speed charging mode, the first characterized in that the battery charge.
【0008】 [0008]
更に本発明は、交流電圧を直流電圧に変換するAC/DC変換部と、該AC/DC変換部から出力された直流電圧を所定値の電圧に変換し、負荷容量が変化する負荷装置に出力するDC/DC変換部と、前記AC/DC変換部から電流を取り込んで充電を行うニッケル水素電池からなるバッテリとを備えるバックアップ電源装置であって、 The invention further output and AC / DC converter for converting an AC voltage into a DC voltage, converts the DC voltage outputted from the AC / DC converting unit into a voltage of a predetermined value, the load device load capacitance changes a DC / DC converter for, a backup power supply device and a battery composed of a nickel-metal hydride battery for charging takes in current from the AC / DC conversion unit,
前記AC/DC変換部の限界電流値を設定する第1の設定回路と、 A first setting circuit for setting the limit current value of the AC / DC conversion unit,
バッテリに対する急速充電モード時のバッテリ充電電流値又は低速充電モード時のバッテリ充電電流値を設定する第2の設定回路と、 A second setting circuit for setting the battery charging current value of the fast charge mode of the battery charging current or low charging mode for the battery,
前記DC/DC変換部からの電流値を検出する電流検出回路と、 A current detection circuit for detecting the current value from the DC / DC converter unit,
前記限界電流値からDC/DC変換部からの電流値を減算したバッテリ充電可能な充電可能電流値と前記設定されたバッテリ充電電流値を比較する比較回路と A comparator circuit for comparing the limit current value battery charge current value the current value which is the set battery chargeable chargeable current value obtained by subtracting from the DC / DC converter unit from,
前記バッテリ充電可能な充電可能電流値又はバッテリ充電電流値のうちの低電流値に応じて半導体素子のスイッチング制御を行い、バッテリ充電を行うバッテリ充電回路とを備え、 The have line switching control of the semiconductor device in accordance with the low current value of the battery chargeable chargeable current or battery charging current value, and a battery charging circuit that performs battery charge,
前記AC/DC変換部の限界電流値は、前記負荷装置の最大容量に前記バッテリに対する低速充電モード時のバッテリ充電電流値を加算した値以上に設定され、急速充電モード時に前記急速充電モード時のバッテリ充電電流値と前記充電可能電流値を比較して前記急速充電モード時のバッテリ充電電流値の方が低い場合には前記急速充電モード時のバッテリ充電電流値によって、前記充電可能電流値の方が低い場合には前記充電可能電流値によって、また、低速充電モード時には前記低速充電モード時のバッテリ充電電流値によって、バッテリ充電を一定電流値によって行うことを第2の特徴とする。 Limiting current of the AC / DC converter unit, the set value or more obtained by adding the battery charging current value during the low-speed charging mode for the battery to the maximum capacity of the load device, the quick charge mode in rapid charging mode wherein the quick charge mode of the battery charging current value when the battery charging current value and the lower of the chargeable current battery charge current value during the rapid charging mode by comparing, towards the chargeable current value by the chargeable current value when low, also, the low-speed charging mode by the battery charging current value during the low-speed charging mode, the second unit performs a battery charge by a constant current value.
【0009】 [0009]
【発明実施の形態】 [Form of invention implementation]
以下、本発明の一実施形態によるバッテリ充電方法及びバックアップ電源装置を図面を参照して詳細に説明する。 Hereinafter, a battery charging method and backup power supply device according to an embodiment of the present invention with reference to the accompanying drawings. 図1は本実施形態によるバッテリ充電方法を適用したバックアップ電源装置の主な回路構成を示す図である。 Figure 1 is a diagram showing a main circuit configuration of the backup power supply device according to the battery charging method according to the present embodiment.
【0010】 [0010]
まず本実施形態によるバックアップ電源装置は、交流電源と負荷装置間に配置され、ニッケル水素電池をバッテリとして使用するものであって、該バッテリの放電量に伴い、バッテリの充電量が小さい場合は所定の大電流によって充電を行う急速充電モード(例えば、容量が3Ahのバッテリの場合、6Aによる急速充電)と、バッテリの充電量が大きい場合は所定の小電流によって充電を行う低速充電モード(例えば、容量が3Ahのバッテリの場合、0.6Aによる低速充電)とを持ち、図1に示す如く、従来と同等のAC/DC変換部101とDC/DC変換部102と、前記DC/DC変換部102の出力電流値を入力部にて電圧値として検出する電流検出部5と、該電流検出部5の両端から延びる線路間に挿入されるコンデンサ2 Backup power supply device according to this embodiment is first placed between the AC power source and the load device, there is the use of nickel-hydrogen batteries as the battery, with the discharge amount of the battery, when the charge amount of the battery is small predetermined fast charge mode (e.g., if the capacity of the battery of 3Ah, rapid charging by 6A) for charging by a large current with slow charge mode when the charging of the battery is large for charging by a predetermined small current (for example, If capacity is battery 3Ah, have slow charging) and by 0.6 a, as shown in FIG. 1, the conventional equivalent AC / DC converter 101 and the DC / DC converter 102, the DC / DC converter unit a current detector 5 for detecting a voltage value at the input unit the output current value of 102, the capacitor 2 to be inserted between the line extending from both ends of the current detector 5 0と、該線路の一方の線路に設けられるダイオード211及びMOSFET213から成る並列回路と、該並列回路の出力及び前記線路の他方間に挿入されるダイオード212と、チョークコイル214と、バッテリ209と、該バッテリ209に供給される電流値を電圧値として検出する検出回部206とを備え、前記コンデンサ210/ダイオード212/MOSFET213/チョークコイル214が降圧回路を構成し、前記MOSFET213が後述する指令信号によってオン/オフ制御されることによってバッテリ209への充電が行われる様に構成されている。 0, a parallel circuit consisting of diode 211 and MOSFET213 provided on one line of 該線 path, a diode 212 is inserted between the other output and the line of said parallel circuit, a choke coil 214, a battery 209, and a scanning operations unit 206 for detecting a current value supplied to the battery 209 as a voltage value, the command signal the capacitor 210 / diode 212 / MOSFET213 / choke coil 214 constitutes a step-down circuit, said MOSFET213 is described below on / by off controlled charging of the battery 209 is configured as to be performed. 尚、本実施形態においてはニッケル水素電池をバッテリとして使用する例を説明するが、本発明はこれに限定されるものではない。 In the present embodiment will be described an example of using the nickel-metal hydride battery as the battery, the present invention is not limited thereto.
【0011】 [0011]
このMOSFET213をオン/オフする回路構成は、電流値を電圧値に変換して制御を行うものであって、前記AC/DC変換部101の限界電流値を電圧値bとして予め設定するための設定回路220と、前記電流検出部5及び設定回路220の両出力abを入力として限界値bから検出値aを減算する減算器201と、該減算器201の出力cと後述するスライスレベルhを入力とし、掛け算を行う掛け算器202と、バッテリ209への充電すべき電流値を急速又は低速モードに応じた電圧値eとして設定するための充電電流値設定回路204と、該設定回路204から指定された電圧値eと前記掛け算器202の出力dとを比較して低レベルの値fを出力する比較器203と、該比較器203の出力fと前記バッテリ電流検出部2 Circuitry for turning on / off this MOSFET213, there performs control by converting the current value into a voltage value, setting for setting in advance a limit current value of the AC / DC converter 101 as a voltage value b type circuit 220, a subtracter 201 for subtracting the detected value a from the limit value b to both outputs ab of the current detector 5 and the setting circuit 220 as an input, the slice level h, which will be described later and the output c of the subtracter 201 and then, a multiplier 202 for multiplying a charging current value setting circuit 204 for setting the voltage value e corresponding to the current value to be charged to the battery 209 rapidly or slow mode is designated from the setting circuit 204 was compared with the voltage value e and the output d of the multiplier 202 and the comparator 203 outputs a low-level value f, the output f of the comparator 203 battery current detection section 2 6からの出力gを入力として減算することによりスライスレベルhを出力する減算器208と、所定の三角波信号iを出力する三角波発生回路205と、前記スライスレベルhと前記三角波発生回路205からの三角波信号iを入力とし、前記スライスレベルhによって指定された幅のパルス信号jを出力することによってMOSFET213を駆動するパルス発生器207とを備える。 A subtracter 208 for outputting the slice level h by subtracting the output g from 6 as an input, a triangular wave generating circuit 205 for outputting a predetermined triangular wave signal i, a triangular wave from said slice level h and the triangular wave generating circuit 205 as input signals i, and a pulse generator 207 for driving the MOSFET213 by outputting a pulse signal j of the width specified by the slice level h. 尚、前記モードの切替は、バッテリ209の電圧値を図示しない回路によって検出し、充電量に応じて切り換えるものである。 The switching of the mode, detected by circuit (not shown) the voltage value of the battery 209, is intended to switch in accordance with the charge amount.
【0012】 [0012]
<急速充電モードの動作説明> <Description of the operation of the fast charge mode>
この回路は、まず、AC/DC変換器101の能力である出力電流の限界値を電圧bとして設定回路220により設定すると共に、バッテリ209に充電すべき電流値を設定回路204により電圧eとして指定し、前記限界値の電圧bから実際にDC/DC変換部102に供給している電流検出回路5からの電圧値aを減算器201により減算し、現在、AC/DC変換部の能力からDC/DC変換部に供給している電流値を引いた値、即ち、バッテリ充電可能な電流に相当する電圧cを出力する。 This circuit, first, the setting by the setting circuit 220 to limit the output current is the ability of the AC / DC converter 101 as a voltage b, designated as a voltage e by setting circuit 204 a current value to be charged to the battery 209 DC were actually subtracted by subtractor 201 a voltage value a from the current detection circuit 5 is supplied to the DC / DC converter 102 from the voltage b of the limit value, the current, AC / DC converter unit of capacity the value obtained by subtracting the current value being supplied to / DC conversion unit, i.e., outputs a voltage c corresponding to the battery chargeable current. ここで、例えば、AC/DC変換部の限界が15A(設定回路220の出力bが15V)、電流検出回路5により検出した電流が5A(出力aが5V)、バッテリの消耗が多く急速充電モードで6Aでの充電が充電電流値設定回路204により6Vとして設定され、減算器201は差分10Vを出力した場合(掛け算器202の動作は後述)、比較器203には出力dの10Vと設定回路204の出力eの6Vが入力され、比較器203から低い値である6Vが出力fとして出力される。 Here, for example, (the output b is 15V setting circuit 220) AC / DC limit of the conversion unit 15A, current current 5A detected by the detecting circuit 5 (the output a is 5V), battery depletion much fast charge mode in charging at 6A is set as 6V by the charging current setting circuit 204, the subtractor 201 when outputting the difference 10V (the operation of the multiplier 202 will be described later), 10V and setting circuit of the output d is the comparator 203 204 is 6V output e is input, 6V is low from comparator 203 is outputted as an output f.
【0013】 [0013]
ここでバッテリ電流検出回路206の出力gが6V、即ち適正な場合は減算器208の出力は0となり、現在のスライスレベルhが維持され、6Aによるバッテリ充電が保持され、バッテリ電流検出回路206の出力gが8V、即ち過大な場合は減算器208によりg−f(8V−6V)=2Vがスライスレベルhとして出力され、パルス発生器207からの三角波信号iのパルス幅を狭めた出力jによりMOSFET213を駆動することによって、バッテリ209へ供給する電流値を6Aに下げる様に動作し、逆にバッテリ電流検出回路206の出力gが4V、即ち少ない場合は減算器208によりg−f(4V−6V)=−2Vがスライスレベルhとして出力され、パルス発生器207からの三角波信号iのパルス幅を広めた出力jに Here battery current output g is 6V detection circuit 206, i.e., the appropriate case becomes 0 the output of the subtracter 208, the current slice level h is maintained, the battery charging by 6A is held, the battery current detection circuit 206 output g of 8V, i.e. excessive case g-f (8V-6V) = 2V by the subtracter 208 is output as a slice level h, the output j of narrowing the pulse width of the triangular wave signal i from the pulse generator 207 by driving the MOSFET213, operates so as to reduce the current supplied to the battery 209 to 6A, the output g is 4V battery current detection circuit 206 conversely, that optionally small subtractor 208 g-f (4V- 6V) = - 2V is outputted as a slice level h, the output j of spread the pulse width of the triangular wave signal i from the pulse generator 207 りMOSFET213を駆動することによって、バッテリ209へ供給する電流値を6Aに上げる様に動作する。 By driving the MOSFET213 Ri operated as to increase the current supplied to the battery 209 to 6A.
【0014】 [0014]
従って本実施形態によるバックアップ電源装置は、急速充電モードの場合、充電電流設定回路204によって指定した急速充電電流を6Aに維持しながらバッテリ充電を行うことができる。 Thus the backup power device according to the present embodiment, the case of fast charge mode, it is possible to perform battery charging while maintaining the fast-charge current specified by the charging current setting circuit 204 to 6A. また本実施形態は、負荷装置の必要とする電力が増大した場合、その増大を電流検出回路5により検出し、バッテリ充電に使用できる電流値を減算器201から出力cとして出力し、6Vを下回る場合は比較器203の出力が当該下回った電流値に相当する電圧値を出力するため、MOSFET213による充電電流値を下げることによって、負荷が増大した場合であってもAC/DC変換部の能力の範囲内且つ急速にバッテリ充電を行うことができる。 In the first embodiment, when the power required by the load device is increased, detected by the current detection circuit 5 and the increase in output as the output c of the current value that can be used in a battery charger from the subtracter 201, below 6V since case of outputting the voltage value corresponding to the current value output of the comparator 203 falls below the, by lowering the charging current value by MOSFET213, even if the load is increased the capacity of the AC / DC converter unit range and rapid battery charging can be performed. 逆に負荷が減収した場合においては比較器203から6Vが出力されるため、バッテリ209の過充電を防止することもできる。 Since 6V is output from the comparator 203 when the reverse load is decreased, it is possible to prevent overcharging of the battery 209.
【0015】 [0015]
尚、前述の掛け算器202は、前述した様に減算器201の出力cと後述するスライスレベルhを入力とし、掛け算を行うことによって、入力電圧とバッテリ電圧の比率を示すパラメータであるデューティを検出して電流値の補正を行うものである。 Incidentally, multiplier 202 of the aforementioned inputs the slice level h, which will be described later and the output c of the subtractor 201 as described above, by performing multiplication, detects the duty is a parameter indicating the ratio of the input voltage and the battery voltage it is intended to correct the current value is. 例えば、バッテリ電流検出器206で検出した電流値が2A、AC/DC変換器101の出力電圧が48V、バッテリ電圧が30Vのとき、実際には、バッテリ209に対して[2A×(出力電圧/バッテリ電圧)=2A×(48V/30V)]=3.2Aまで充電することができ、この補正を行うものである。 For example, when the current value detected by the battery current detector 206 is 2A, the output voltage of the AC / DC converter 101 is 48V, the battery voltage is 30 V, in fact, [2A × the battery 209 (output voltage / battery voltage) = 2A × (48V / 30V)] = 3.2A until it can be charged, and performs the correction.
【0016】 [0016]
<低速充電モードの動作説明> <Description of the operation of the low-speed charging mode>
このモード時の回路は、前述の設定回路220による限界値の電圧bによる設定、設定回路204による充電すべき電流値の電圧eによる設定、充電電流値設定回路204による低速充電モードによる0.6Vの設定が成されているものとする。 Circuit in this mode, set by the voltage b of the limit value by the setting circuit 220 described above, set by the voltage e of the current value to be charged by the setting circuit 204, 0.6V low-speed charging mode according to the charging current value setting circuit 204 it is assumed that the settings have been made. ここで、本回路は、前記限界値の電圧bから実際にDC/DC変換部102に供給している電流検出回路5からの電圧値aを減算器201により減算し、現在、AC/DC変換部の能力からDC/DC変換部に供給している電流値を引いた値、即ち、バッテリ充電可能な電流に相当する電圧cを出力する。 Here, the circuit, the voltage value a from the current detection circuit 5 which is actually supplied to the DC / DC converter 102 from the voltage b of the limit values ​​is subtracted by the subtractor 201, the current, AC / DC converter the value obtained by subtracting the current value is supplied to the DC / DC converter unit from parts of the capacity, i.e., it outputs a voltage c corresponding to the battery chargeable current. ここで、例えば、AC/DC変換部の限界が15A(設定回路220の出力bが15V)、電流検出回路5により検出した電流が5A(出力aが5V)、バッテリの消耗が少ない低速充電モードで0.6Aでの充電が充電電流値設定回路204により0.6Vとして設定されていた場合、減算器201は差分10Vを出力し(掛け算器202の動作は除く)、比較器203には出力dの10Vと設定回路204の出力eの0.6Vが入力され、比較器203から低い値である0.6Vが出力fとして出力される。 Here, for example, (the output b is 15V setting circuit 220) AC / DC limit of the conversion unit 15A, a current detected by the current detecting circuit 5 5A (output a is 5V), the battery slow charge mode depletion is little in case of charging at 0.6A is set as 0.6V by the charging current setting circuit 204, (excluding the operation of the multiplier 202) subtracter 201 outputs a difference 10V, the output to the comparator 203 0.6V output e of d of 10V and setting circuit 204 is input, 0.6V is a low value from the comparator 203 is outputted as an output f.
【0017】 [0017]
ここでバッテリ電流検出回路206の出力gが0.6V、即ち適正な場合は減算器208の出力は0となり、現在のスライスレベルhが維持され、0.6Aによるバッテリ充電が保持され、バッテリ電流検出回路206の出力gが8V、即ち過大な場合は減算器208によりg−f(8V−0.6V)=7.4Vがスライスレベルhとして出力され、パルス発生器207からの三角波信号iのパルス幅を狭めた出力jによりMOSFET213を駆動することによって、バッテリ209へ供給する電流値を0.6Vに下げる様に動作し、逆にバッテリ電流検出回路206の出力gが0.2V、即ち少ない場合は減算器208によりg−f(0.2−0.6V)=−0.4Vがスライスレベルhとして出力され、パルス発生器207からの三角 Here the output g is 0.6V battery current detection circuit 206, i.e., the appropriate case the output is 0 subtractor 208, the current slice level h is maintained and held battery charge due is 0.6 A, the battery current the output g of the detection circuit 206 is 8V, i.e. excessive case g-f (8V-0.6V) = 7.4V by the subtracter 208 is output as a slice level h, the triangular wave signal i from the pulse generator 207 by driving the MOSFET213 by the output j of narrowing the pulse width, and operates the current supplied to the battery 209 as reduced to 0.6V, the 0.2V, i.e. less output g of the battery current detection circuit 206 conversely If the subtractor 208 g-f (0.2-0.6V) = - 0.4V is output as a slice level h, triangular from the pulse generator 207 信号iのパルス幅を広めた出力jによりMOSFET213を駆動することによって、バッテリ209へ供給する電流値を0.6Vに上げる様に動作する。 By driving the MOSFET213 by the output j of spread the pulse width of the signal i, operated as to increase the current supplied to the battery 209 to 0.6V.
【0018】 [0018]
従って本実施形態によるバックアップ電源装置は、低速充電モードの場合、充電電流設定回路204によって指定した低速充電電流を0.6Aに維持しながらバッテリ充電を行うことができる。 Thus the backup power device according to the present embodiment, when the low-speed charging mode, it is possible to perform battery charging while maintaining a slow charging current specified by the charging current setting circuit 204 to 0.6 A.
【0019】 [0019]
この様に本実施形態によるバックアップ電源装置は、予めAC/DC変換器の限界電流値の設定、急速又は低速充電モードによる充電電流の設定を行い、各モードにより指定された一定電流値によってバッテリ充電を行うことができ、このため急速充電モード時には短時間にバッテリ充電を行うことにより過充電を防止することができ、低速充電モード時には少ない充電電流によりバッテリ充電を行うことによりAC/DC変換部に影響がない範囲でバッテリ充電を行うことができる。 Thus the backup power device according to the present embodiment, pre-AC / DC converter settings limit current value, to set the charging current by rapid or slow charge mode, the battery charging by the specified fixed current value depending on the mode can do this because it is possible to prevent overcharging by performing battery charging in a short period of time the fast charge mode, the small charging current to the low-speed charging mode to AC / DC converting unit by performing the battery charging it is possible to perform the battery charging in effect there is no range.
【0020】 [0020]
更に本実施形態によるバックアップ電源装置は、予めAC/DC変換器の限界電流値を設定すると共に負荷装置に供給しているDC/DC変換部の供給電流を検出し、両者の差分の範囲内でバッテリ充電を行うため、AC/DC変換部の容量を必要最低限に抑えることができる。 Further backup power supply device according to the present embodiment detects the current supplied beforehand AC / DC converter of the DC / DC converter unit which is supplied to the load device sets a limit current value, in the range of the difference between them to perform a battery charge, it is possible to suppress the capacity of the AC / DC converting unit into minimum.
【0021】 [0021]
具体的に説明すると、高速充電モードの場合、従来技術においてはAC/DC変換部の負荷が通常5Aで周期的に13A必要となるとき、AC/DC変換部は13Aに充電用電流値6Aを加え、更にマージンを考慮した20A以上の大容量にしなければならなかったが、本実施形態においては、AC/DC変換部1の電流限界値を設定し、この限界値からDC/DC変換部に供給されている検出電流値減算した値(出力c)の範囲内で、モードにより設定された充電電流値により充電を行うため、即ち、従来の如く設定されたワット数に従った電流値を設定しないため、大容量のAC/DC変換部を不必要とすることができる。 More specifically, in the case of fast charge mode, in the prior art when the load of the AC / DC converter unit is periodically 13A required in normal 5A, AC / DC conversion unit for charging current 6A to 13A in addition, it had to the further large or 20A in consideration of the margin, in the present embodiment, to set the current limit value of the AC / DC converter unit 1, the DC / DC converter unit from the limit value within the scope of supply has been that the detected current value subtraction value (output c), for charging by the setting charging current value by the mode, i.e., set the current value according to the wattage which has been set as in the conventional since it does not, it can be an AC / DC converter unit of large capacity unnecessary.
【0022】 [0022]
またDC/DC変換部負荷が5A→13A(20s間)→5Aと変化するとき、バックアップ電源の取り込み電流は6A→2A(20s間)→6Aとなるため、AC/DC変換部は11A→15A→11Aと従来に比べて低容量にすることができる。 Also, when DC / DC converter unit load (between 20s) 5A → 13A → 5A to vary, since the capture current (between 20s) 6A → 2A → 6A of the backup power supply, AC / DC conversion unit 11A → 15A → it can be in low volume as compared to the 11A and conventional.
【0023】 [0023]
尚、前記実施形態においては、電流値を一旦電圧値に変換してバッテリへの充電電流をモードに応じて一定値に保つ例を説明したが本発明は、これに限られるものではなく、電流値そのものを検出して制御する様に構成しても良い。 In the above embodiment, an example has been described to maintain a constant value in response by converting the current value once a voltage value mode the charging current to the battery present invention is not limited to this, current it may be configured so as to control by detecting the value itself.
【0024】 [0024]
【発明の効果】 【Effect of the invention】
以上述べた如く本発明によれば、AC/DC変換部の限界電流値bとバッテリに対する急速充電モード又は低速充電モード時のバッテリ充電電流値eとを設定し、DC/DC変換器の電流値aを検出し、前記限界電流値bからDC/DC変換器の電流値aを減算したバッテリ充電可能な充電可能電流値cと前記モードにより設定されたバッテリ充電電流値eを比較し、両電流値のうちの低電流値によってバッテリ充電を行うことによって、バッテリへの充電電流をバッテリの消耗度合いに応じて一定に保つことができると共にAC/DC変換部の容量を小容量とすることができる。 According to the above mentioned as the present invention, to set the battery charge current value e of the fast charge mode or a slow charging mode for limiting current b and the battery of the AC / DC converter unit, DC / DC converter of a current value detects a, comparing the limit current value b from the DC / DC converter battery charging current value e that is set by the current value a can battery charge by subtracting a chargeable current value c and the mode, both current by performing the battery charging by a low current value of the values, the capacity of the AC / DC converter unit can retain a charge current to the battery at a constant depending on the exhaustion degree of the battery can be small-capacity .
【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS
【図1】本発明の一実施形態によるバックアップ電源装置の主な回路構成を示す図。 It shows main circuit configuration of the backup power supply device according to an embodiment of the present invention; FIG.
【図2】従来技術による電源システムを説明するための図。 Figure 2 is a diagram for explaining a power supply system according to the prior art.
【符号の説明】 DESCRIPTION OF SYMBOLS
101:AC/DC変換部、102:DC/DC変換部、200:交流電源、300:負荷装置、5:電流検出部、201:減算器、202:掛け算器、203:比較器、204:充電電流設定回路、205:三角波発生回路、207:パルス発生回路、208:減算器、209:バッテリ、220:AC/DC変換部の限界電流設定回路。 101: AC / DC converting unit, 102: DC / DC converter unit, 200: AC power supply 300: Load device, 5: current detector, 201: subtracter, 202: multiplier, 203: comparator, 204: Charge current setting circuit, 205: a triangular wave generating circuit, 207: pulse generating circuit, 208: subtracter, 209: battery, 220: AC / DC converting unit limiting current setting circuit.

Claims (2)

  1. 交流電圧を直流電圧に変換するAC/DC変換部と、 And AC / DC converter for converting an AC voltage into a DC voltage,
    該AC/DC変換部から出力された直流電圧を所定値の電圧に変換し、負荷容量が変化する負荷装置に出力するDC/DC変換部と、 And said DC voltage output from the AC / DC converter unit converts a voltage of a predetermined value, DC / DC converter for outputting to a load device load capacitance changes,
    前記AC/DC変換部から電流を取り込んで充電を行うニッケル水素電池からなるバッテリとを備えるバックアップ電源装置のバッテリ充電方法であって、 A battery charging method of the backup power supply device and a battery composed of a nickel-metal hydride battery for charging takes in current from the AC / DC conversion unit,
    前記AC/DC変換部の限界電流値と、バッテリに対する急速充電モード時のバッテリ充電電流値又は低速充電モード時のバッテリ充電電流値とを設定し、 The set and limiting current of the AC / DC conversion unit, and a battery charging current value of the battery charging current value or slow charge mode during fast charge mode of the battery,
    前記DC/DC変換部の電流値を検出し、前記限界電流値からDC/DC変換部からの電流値を減算したバッテリ充電可能な充電可能電流値と前記設定されたバッテリ充電電流値を比較し、 Wherein detecting a current value of the DC / DC converter unit, comparing the limit current value battery rechargeable chargeable current value and the set battery charge current value of the current value obtained by subtracting from the DC / DC converter unit from ,
    前記バッテリ充電可能な充電可能電流値又はバッテリ充電電流値のうちの低電流値に応じて半導体素子のスイッチング制御を行い、 Performs switching control of the semiconductor device in accordance with the low current value of the battery charge can be chargeable current or battery charging current value,
    前記AC/DC変換部の限界電流値は、前記負荷装置の最大容量に前記バッテリに対する低速充電モード時のバッテリ充電電流値を加算した値以上に設定して、急速充電モード時に前記急速充電モード時のバッテリ充電電流値と前記充電可能電流値を比較して前記急速充電モード時のバッテリ充電電流値の方が低い場合には前記急速充電モード時のバッテリ充電電流値によって、前記充電可能電流値の方が低い場合には前記充電可能電流値によって、また、低速充電モード時には前記低速充電モード時のバッテリ充電電流値によって、バッテリ充電を行うことを特徴とするバッテリ充電方法。 The limiting current value of the AC / DC converter unit, the set value or more obtained by adding the battery charging current value during the low-speed charging mode for the battery to the maximum capacity of the load device, the quick charge mode in rapid charging mode said the quick charge mode of the battery charging current value when the battery charging current value and the lower of said comparing chargeable current value the quick charge mode of the battery charging current value, of the chargeable current value by it is the chargeable current value if it is lower, also, by a battery charging current value during the low-speed charging mode to the low-speed charging mode, the battery charging method and performing battery charging.
  2. 交流電圧を直流電圧に変換するAC/DC変換部と、 And AC / DC converter for converting an AC voltage into a DC voltage,
    該AC/DC変換部から出力された直流電圧を所定値の電圧に変換し、負荷容量が変化する負荷装置に出力するDC/DC変換部と、 And said DC voltage output from the AC / DC converter unit converts a voltage of a predetermined value, DC / DC converter for outputting to a load device load capacitance changes,
    前記AC/DC変換部から電流を取り込んで充電を行うニッケル水素電池からなるバッテリとを備えるバックアップ電源装置であって、 A backup power supply device and a battery composed of a nickel-metal hydride battery for charging takes in current from the AC / DC conversion unit,
    前記AC/DC変換部の限界電流値を設定する第1の設定回路と、 A first setting circuit for setting the limit current value of the AC / DC conversion unit,
    バッテリに対する急速充電モード時のバッテリ充電電流値又は低速充電モード時のバッテリ充電電流値を設定する第2の設定回路と、 A second setting circuit for setting the battery charging current value of the fast charge mode of the battery charging current or low charging mode for the battery,
    前記DC/DC変換部からの電流値を検出する電流検出回路と、 A current detection circuit for detecting the current value from the DC / DC converter unit,
    前記限界電流値からDC/DC変換部からの電流値を減算したバッテリ充電可能な充電可能電流値と前記設定されたバッテリ充電電流値を比較する比較回路と A comparator circuit for comparing the limit current value battery charge current value the current value which is the set battery chargeable chargeable current value obtained by subtracting from the DC / DC converter unit from,
    前記バッテリ充電可能な充電可能電流値又はバッテリ充電電流値のうちの低電流値に応じて半導体素子のスイッチング制御を行い、バッテリ充電を行うバッテリ充電回路とを備え、 The have line switching control of the semiconductor device in accordance with the low current value of the battery chargeable chargeable current or battery charging current value, and a battery charging circuit that performs battery charge,
    前記AC/DC変換部の限界電流値は、前記負荷装置の最大容量に前記バッテリに対する低速充電モード時のバッテリ充電電流値を加算した値以上に設定され、急速充電モード時に前記急速充電モード時のバッテリ充電電流値と前記充電可能電流値を比較して前記急速充電モード時のバッテリ充電電流値の方が低い場合には前記急速充電モード時のバッテリ充電電流値によって、前記充電可能電流値の方が低い場合には前記充電可能電流値によって、また、低速充電モード時には前記低速充電モード時のバッテリ充電電流値によって、バッテリ充電を一定電流値によって行うことを特徴とするバックアップ電源装置。 Limiting current of the AC / DC converter unit, the set value or more obtained by adding the battery charging current value during the low-speed charging mode for the battery to the maximum capacity of the load device, the quick charge mode in rapid charging mode wherein the quick charge mode of the battery charging current value when the battery charging current value and the lower of the chargeable current battery charge current value during the rapid charging mode by comparing, towards the chargeable current value by the chargeable current value when low, also the battery charge current value during the low-speed charging mode to the low-speed charging mode, the backup power supply and performing battery charge by a constant current value.
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