JP2007124872A - Solar type portable charger - Google Patents

Solar type portable charger Download PDF

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JP2007124872A
JP2007124872A JP2005317594A JP2005317594A JP2007124872A JP 2007124872 A JP2007124872 A JP 2007124872A JP 2005317594 A JP2005317594 A JP 2005317594A JP 2005317594 A JP2005317594 A JP 2005317594A JP 2007124872 A JP2007124872 A JP 2007124872A
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secondary battery
voltage
normally open
open contact
resistor
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JP4034800B2 (en
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Zenzo Nakamura
善蔵 中村
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Tokyo Coil Engineering Co Ltd
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Tokyo Coil Engineering Co Ltd
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Priority to JP2005317594A priority Critical patent/JP4034800B2/en
Priority to TW095130983A priority patent/TWI337793B/en
Priority to KR1020060082963A priority patent/KR100841135B1/en
Priority to CNB2006101266633A priority patent/CN100433501C/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S323/00—Electricity: power supply or regulation systems
    • Y10S323/906—Solar cell systems

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solar type portable charger capable of properly notifying whether electric power necessary for charging a load is stored in a secondary battery or not, without consuming the electric power of the secondary battery as much as possible. <P>SOLUTION: A voltage determination circuit 30 operates by the voltage of the secondary battery 3, only when a push-bottom type normally-opened contact 23 is turned on. The voltage determination circuit 30 turns on a transistor 26, only when the voltage of the secondary battery 3 is below a set level. When the transistor 26 is turned on, the energizing path between the output terminal of a DC-DC converter 10 and a light emitting diode 24 is formed, lighting the light emitting diode 24. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

この発明は、携帯電話器等の負荷を太陽光のエネルギーを利用して充電するソーラ式携帯充電器に関する。   The present invention relates to a solar-type portable charger that charges a load such as a portable telephone using solar energy.

携帯電話器の普及には著しいものがあり、その便利さを多くの人が享受している。この携帯電話器は電池を電源としており、その電池は商用交流電源を利用する充電器によって充電される。   There is a remarkable spread of mobile phones, and many people enjoy the convenience. This cellular phone uses a battery as a power source, and the battery is charged by a charger using a commercial AC power source.

しかしながら、外出先や旅行先では、充電器がないために携帯電話器を充電できない。また、災害等の非常時は、商用交流電源の停電により、たとえ充電器があっても、携帯電話器を充電できない。   However, the mobile phone cannot be charged at the place of going out or traveling because there is no charger. In an emergency such as a disaster, the mobile phone cannot be charged even if there is a charger due to a power failure of the commercial AC power supply.

そこで、太陽電池およびその太陽電池の出力により充電される二次電池を有し、二次電池に蓄えた電力をＤＣ−ＤＣコンバータで直流に変換して携帯電話器に供給するソーラ式携帯充電器が開発され、実用化されつつある。   Therefore, a solar portable battery charger having a solar battery and a secondary battery charged by the output of the solar battery, and converting the electric power stored in the secondary battery into a direct current by a DC-DC converter and supplying the direct current to the mobile phone Is being developed and put into practical use.

このようなソーラ式携帯充電器があれば、外出先や旅行先でも、また災害等の非常時にも、太陽光のエネルギーを使って携帯電話器を充電することができる。   With such a solar-type portable charger, it is possible to charge a portable telephone device using the energy of sunlight even when going out, traveling, or in an emergency such as a disaster.

上記のソーラ式携帯充電器では、たとえ光が当たる状況であっても、二次電池に十分な電力が蓄えられていなければ、負荷である携帯電話器を充電することができない。   In the above-mentioned solar portable charger, even if it is exposed to light, if a sufficient power is not stored in the secondary battery, it is not possible to charge the portable phone as a load.

そこで、携帯電話器の充電に必要な電力が二次電池に蓄えられているかどうかを、発光体たとえば発光ダイオードの点灯・消灯によって報知することが考えられる。   Therefore, it is conceivable to notify whether or not the power necessary for charging the mobile phone is stored in the secondary battery by turning on or off the light emitter, for example, the light emitting diode.

ただし、この場合、二次電池に蓄えられた貴重な電力を、できるだけ消費しないようにすることが重要である。   However, in this case, it is important that the precious power stored in the secondary battery is not consumed as much as possible.

この発明は、上記の事情を考慮したもので、負荷の充電に必要な電力が二次電池に蓄えられているかどうかを、二次電池の電力をできるだけ消費することなく、適切に報知することが可能なソーラ式携帯充電器を提供することを目的とする。   In consideration of the above circumstances, the present invention can appropriately notify whether the power necessary for charging the load is stored in the secondary battery without consuming as much power as possible from the secondary battery. An object of the present invention is to provide a solar powered portable charger.

請求項１に係る発明のソーラ式携帯充電器は、太陽電池と、この太陽電池の出力により充電される二次電池と、この二次電池の電圧を所定レベルの直流電圧に変換するＤＣ−ＤＣコンバータと、このＤＣ−ＤＣコンバータの出力端に接続された充電用端子と、通電制御用スイッチと、自動復帰形の押釦式常開接点と、上記ＤＣ−ＤＣコンバータの出力端に、上記通電制御用スイッチおよび上記押釦式常開接点を介して接続された発光体と、上記押釦式常開接点を介して上記二次電池に接続され、その押釦式常開接点のオン時に作動して、上記二次電池の電圧が設定レベル未満の場合に上記通電制御用スイッチをオンする電圧判定回路と、を備えている。   The solar portable charger of the invention according to claim 1 is a solar battery, a secondary battery charged by the output of the solar battery, and a DC-DC that converts the voltage of the secondary battery into a DC voltage of a predetermined level. A converter, a charging terminal connected to the output end of the DC-DC converter, an energization control switch, an automatic return type push button type normally open contact, and the energization control at the output end of the DC-DC converter. Connected to the secondary battery via the switch and the push button type normally open contact, and connected to the secondary battery via the push button type normally open contact, and operates when the push button type normally open contact is on, And a voltage determination circuit that turns on the energization control switch when the voltage of the secondary battery is lower than a set level.

押釦式常開接点がオンされたときのみ、二次電池の電圧によって電圧判定回路が作動する。電圧判定回路は、二次電池の電圧が設定レベル未満の場合に、通電制御用スイッチをオンする。通電制御用スイッチがオンすると、ＤＣ−ＤＣコンバータの出力端と発光体との間の通電路が形成され、発光体が点灯する。   Only when the push-button normally open contact is turned on, the voltage determination circuit is activated by the voltage of the secondary battery. The voltage determination circuit turns on the energization control switch when the voltage of the secondary battery is lower than the set level. When the energization control switch is turned on, an energization path is formed between the output end of the DC-DC converter and the light emitter, and the light emitter is turned on.

この発明のソーラ式携帯充電器によれば、押釦式常開接点がオンされたときのみ、二次電池の電圧によって電圧判定回路が作動する。よって、負荷の充電に必要な電力が二次電池に蓄えられているかどうかを、二次電池の電力をできるだけ消費することなく、適切に報知することができる。   According to the solar portable charger of the present invention, the voltage determination circuit is operated by the voltage of the secondary battery only when the push button type normally open contact is turned on. Therefore, it is possible to appropriately notify whether or not the power necessary for charging the load is stored in the secondary battery without consuming as much power as possible from the secondary battery.

以下、この発明の一実施形態について図面を参照して説明する。   Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

図１において、１は太陽電池で、光を受けることにより直流電圧を発生する。この太陽電池１の出力電圧が、逆流防止用のダイオード２を順方向に介して二次電池３に充電される。二次電池３として、例えば定格電圧２．４Ｖのニッケル水素電池が使用されている。   In FIG. 1, reference numeral 1 denotes a solar cell, which generates a DC voltage by receiving light. The output voltage of the solar cell 1 is charged into the secondary battery 3 through the diode 2 for preventing backflow in the forward direction. As the secondary battery 3, for example, a nickel metal hydride battery having a rated voltage of 2.4V is used.

そして、二次電池３に、コンデンサ４およびＤＣ−ＤＣコンバータ１０が接続されている。ＤＣ−ＤＣコンバータ１０は、インダクタ１１、ダイオード１３、制御回路（ＩＣ回路）１４、およびＦＥＴ１５からなり、周波数変調（ＰＦＭ）によるスイッチングにより、二次電池３の電圧を所定レベルたとえば５Ｖの直流電圧に変換する。すなわち、制御回路１４は、当該ＤＣ−ＤＣコンバータ１０の出力電圧が５Ｖを下回ろうとするとスイッチングを行い、当該ＤＣ−ＤＣコンバータ１０の出力電圧を５Ｖ以上に維持する。   A capacitor 4 and a DC-DC converter 10 are connected to the secondary battery 3. The DC-DC converter 10 includes an inductor 11, a diode 13, a control circuit (IC circuit) 14, and an FET 15. The voltage of the secondary battery 3 is changed to a predetermined level, for example, a DC voltage of 5V by switching by frequency modulation (PFM). Convert. That is, the control circuit 14 performs switching when the output voltage of the DC-DC converter 10 falls below 5V, and maintains the output voltage of the DC-DC converter 10 at 5V or higher.

このＤＣ−ＤＣコンバータ１０の出力端にコンデンサ５が接続され、そのコンデンサ５にコイル６およびコンデンサ７からなるノイズフィルタを介して充電用端子８ａ，８ｂが接続されている。この充電用端子８ａ，８ｂに、負荷である携帯電話器が接続される。   A capacitor 5 is connected to the output terminal of the DC-DC converter 10, and charging terminals 8 a and 8 b are connected to the capacitor 5 through a noise filter including a coil 6 and a capacitor 7. A mobile phone as a load is connected to the charging terminals 8a and 8b.

また、ＤＣ−ＤＣコンバータ１０の正側出力端（＋）に非常照明用の発光体たとえば発光ダイオード２１のカソードが接続され、その発光ダイオード２１のアノードが抵抗２２および自動復帰形の押釦式常開接点２３を介してＤＣ−ＤＣコンバータ１０の負側出力端（−）に接続されている。   The positive output terminal (+) of the DC-DC converter 10 is connected to a light emitter for emergency illumination, for example, the cathode of a light emitting diode 21, and the anode of the light emitting diode 21 is a resistor 22 and an automatic return pushbutton type normally open. The contact 23 is connected to the negative output terminal (−) of the DC-DC converter 10.

さらに、ＤＣ−ＤＣコンバータ１０の正側出力端（＋）に電圧レベル報知用の発光体たとえば発光ダイオード２４のカソードが接続され、その発光ダイオード２４のアノードが抵抗２５および通電制御用スイッチたとえばＮＰＮ型トランジスタ（第１トランジスタ）２６のコレクタ・エミッタ間を介してＤＣ−ＤＣコンバータ１０の負側出力端（−）に接続されている。押釦式常開接点２３がオンされたとき、トランジスタ２６がオンしていれば、発光ダイオード２４が点灯することになる。   Furthermore, the positive output terminal (+) of the DC-DC converter 10 is connected to a light emitter for voltage level notification, for example, the cathode of a light emitting diode 24, and the anode of the light emitting diode 24 is connected to a resistor 25 and an energization control switch, for example, NPN type. The transistor (first transistor) 26 is connected to the negative output terminal (−) of the DC-DC converter 10 via the collector and the emitter. When the push button type normally open contact 23 is turned on, the light emitting diode 24 is turned on if the transistor 26 is turned on.

一方、二次電池３に、押釦式常開接点２３を介して、電圧判定回路３０が接続されている。電圧判定回路３０は、押釦式常開接点２３のオン時に二次電池３の電圧により作動し、二次電池３の電圧が設定レベル（例えば１．９Ｖ）未満の状態にあれば、上記トランジスタ２６をオンする。   On the other hand, a voltage determination circuit 30 is connected to the secondary battery 3 via a push button type normally open contact 23. The voltage determination circuit 30 is operated by the voltage of the secondary battery 3 when the pushbutton-type normally open contact 23 is turned on. Turn on.

電圧判定回路３０の具体的な構成について説明する。まず、抵抗（第１抵抗）３１および抵抗（第２抵抗）３２の直列回路が、押釦式常開接点２３を介して二次電池３に接続されている。そして、抵抗３２に、ＮＰＮ型トランジスタ（第２トランジスタ）３３のベース・エミッタ間が接続されている。トランジスタ３３のコレクタは抵抗３４を介してＤＣ−ＤＣコンバータ１０の正側出力端（＋）に接続され、トランジスタ３３のエミッタは押釦式常開接点２３を介してＤＣ−ＤＣコンバータ１０の負側出力端（−）に接続されている。さらに、コンデンサ４１が押釦式常開接点２３を介してＤＣ−ＤＣコンバータ１０の出力端に接続されている。また、抵抗（第３抵抗）４４およびＮＰＮ型トランジスタ（第３トランジスタ）４３のコレクタ・エミッタ間の直列回路が、押釦式常開接点２３を介して、二次電池３に接続されている。そして、コンデンサ４１にトランジスタ４３のベース・エミッタ間が抵抗４２を介して接続されるとともに、トランジスタ４３のコレクタに抵抗（第４抵抗）４５を介して上記抵抗３１，３２の相互接続点が接続されている。   A specific configuration of the voltage determination circuit 30 will be described. First, a series circuit of a resistor (first resistor) 31 and a resistor (second resistor) 32 is connected to the secondary battery 3 via a push button type normally open contact 23. The base 32 and the emitter of the NPN transistor (second transistor) 33 are connected to the resistor 32. The collector of the transistor 33 is connected to the positive output terminal (+) of the DC-DC converter 10 via the resistor 34, and the emitter of the transistor 33 is connected to the negative output of the DC-DC converter 10 via the push button type normally open contact 23. It is connected to the end (-). Further, the capacitor 41 is connected to the output terminal of the DC-DC converter 10 via the push button type normally open contact 23. A series circuit between the collector and the emitter of the resistor (third resistor) 44 and the NPN transistor (third transistor) 43 is connected to the secondary battery 3 via the push button type normally open contact 23. The base and emitter of the transistor 43 are connected to the capacitor 41 via a resistor 42, and the interconnection point of the resistors 31 and 32 is connected to the collector of the transistor 43 via a resistor (fourth resistor) 45. ing.

つぎに、上記の構成の作用を説明する。
太陽電池１に光が当たると、太陽電池１から直流電圧が出力される。この出力電圧により、二次電池３に充電される。 Next, the operation of the above configuration will be described.
When light hits the solar cell 1, a DC voltage is output from the solar cell 1. The secondary battery 3 is charged by this output voltage.

充電用端子８ａ，８ｂに携帯電話器が接続されると、二次電池３の電圧がＤＣ−ＤＣコンバータ１０で直流電圧に変換され、充電用端子８ａ，８ｂに供給される。これにより、携帯電話器が充電される。   When the mobile phone is connected to the charging terminals 8a and 8b, the voltage of the secondary battery 3 is converted into a DC voltage by the DC-DC converter 10 and supplied to the charging terminals 8a and 8b. Thereby, the mobile phone is charged.

押釦式常開接点２３がオンされると、ＤＣ−ＤＣコンバータ１０の出力端と非常照明用の発光ダイオード２１との間の通電路が形成され、発光ダイオード２１が点灯する。押釦式常開接点２３がオフすると、ＤＣ−ＤＣコンバータ１０の出力端と発光ダイオード２１との間の通電路が遮断され、発光ダイオード２１が消灯する。   When the push button type normally open contact 23 is turned on, an energization path is formed between the output end of the DC-DC converter 10 and the light emitting diode 21 for emergency lighting, and the light emitting diode 21 is turned on. When the push button type normally open contact 23 is turned off, the energization path between the output terminal of the DC-DC converter 10 and the light emitting diode 21 is cut off, and the light emitting diode 21 is turned off.

また、押釦式常開接点２３がオンされると、二次電池３の電圧が抵抗３１，３２の直列回路に印加される。このとき、二次電池３の電圧が設定レベル以上であれば、抵抗３２の電圧によってトランジスタ３３がオンする。トランジスタ３３がオンすると、トランジスタ３３のコレクタ電位が低下し、トランジスタ２６がオフ状態を維持する。こうして、トランジスタ２６がオフ状態を維持することにより、たとえ押釦式常開接点２３がオンされていても、電圧レベル報知用の発光ダイオード２４は消灯状態を維持する。これにより、二次電池３の電圧が設定レベル以上の状態にあって、携帯電話器の充電が可能であることが報知される。   When the push button type normally open contact 23 is turned on, the voltage of the secondary battery 3 is applied to the series circuit of the resistors 31 and 32. At this time, if the voltage of the secondary battery 3 is equal to or higher than the set level, the transistor 33 is turned on by the voltage of the resistor 32. When the transistor 33 is turned on, the collector potential of the transistor 33 is lowered and the transistor 26 is kept off. Thus, by maintaining the transistor 26 in the OFF state, even if the push button type normally open contact 23 is ON, the voltage level notification light emitting diode 24 is maintained in the OFF state. Thereby, it is notified that the voltage of the secondary battery 3 is in a state equal to or higher than the set level and the mobile phone can be charged.

押釦式常開接点２３がオンされたとき、二次電池３の電圧が設定レベル未満に減少していれば、トランジスタ３３がオフ状態を維持する。トランジスタ３３がオフであれば、トランジスタ３３のコレクタ電位が高くなり、トランジスタ２６がオンする。トランジスタ２６がオンすると、ＤＣ−ＤＣコンバータ１０の出力端と発光ダイオード２４との間の通電路が形成され、発光ダイオード２４が点灯する。これにより、二次電池３の電圧が設定レベル未満の状態にあって、携帯電話器の確実な充電が不可能であることが報知される。   When the push-button normally open contact 23 is turned on, if the voltage of the secondary battery 3 has decreased below the set level, the transistor 33 maintains the off state. If the transistor 33 is off, the collector potential of the transistor 33 becomes high and the transistor 26 is turned on. When the transistor 26 is turned on, a current path between the output terminal of the DC-DC converter 10 and the light emitting diode 24 is formed, and the light emitting diode 24 is turned on. Thereby, it is notified that the voltage of the secondary battery 3 is less than the set level and that the mobile phone cannot be reliably charged.

なお、ＤＣ−ＤＣコンバータ１０のスイッチングに伴い、抵抗３２の電圧に変動が生じる可能性がある。抵抗３２の電圧が変動すると、トランジスタ３３がオン，オフを繰り返し、それがトランジスタ２６の動作に波及して発光ダイオード２４が点灯と消灯を頻繁に繰り返してしまう。   Note that the voltage of the resistor 32 may vary with the switching of the DC-DC converter 10. When the voltage of the resistor 32 fluctuates, the transistor 33 is repeatedly turned on and off, which affects the operation of the transistor 26, and the light emitting diode 24 is frequently turned on and off.

しかしながら、押釦式常開接点２３のオンに際しては、ＤＣ−ＤＣコンバータ１０の出力電圧がコンデンサ４１に印加され、そのコンデンサ４１の電圧によってトランジスタ４３がオンする。トランジスタ４３がオンすると、抵抗３１，３２の相互接続点の電圧変動が抵抗４４，４５およびトランジスタ４３を通して吸収される。これにより、抵抗３２の電圧の変動を抑えることができ、トランジスタ３３の不要なオン，オフの繰り返しを回避することができる。これにより、発光ダイオード２４が点灯と消灯を頻繁に繰り返す不具合を防止できる。   However, when the pushbutton type normally open contact 23 is turned on, the output voltage of the DC-DC converter 10 is applied to the capacitor 41, and the transistor 43 is turned on by the voltage of the capacitor 41. When the transistor 43 is turned on, the voltage fluctuation at the interconnection point of the resistors 31 and 32 is absorbed through the resistors 44 and 45 and the transistor 43. Thereby, fluctuations in the voltage of the resistor 32 can be suppressed, and unnecessary on / off repetition of the transistor 33 can be avoided. Thereby, the malfunction which the light emitting diode 24 repeats lighting and extinction frequently can be prevented.

以上のように、二次電池３の電圧が設定レベル未満の場合に発光ダイオード２４を点灯させる電圧判定回路３０を設け、その電圧判定回路３０を押釦式常開接点２３がオンされたときのみ二次電池３の電圧によって作動させる構成としたので、押釦式常開接点２３がオフの場合に二次電池３から電圧判定回路３０に無駄な電流が流れない。したがって、携帯電話器の充電に必要な電力が二次電池３に蓄えられているかどうかを、二次電池３の電力をできるだけ消費することなく、適切に報知することができる。二次電池３の電力消費を抑制できるので、太陽電池１で集めた貴重な充電エネルギーを、携帯電話器の充電や災害時の非常照明に、無駄なく有効に活用することができる。   As described above, the voltage determination circuit 30 that turns on the light emitting diode 24 when the voltage of the secondary battery 3 is lower than the set level is provided, and the voltage determination circuit 30 is provided only when the pushbutton-type normally open contact 23 is turned on. Since the operation is performed by the voltage of the secondary battery 3, no wasteful current flows from the secondary battery 3 to the voltage determination circuit 30 when the push-button normally open contact 23 is off. Therefore, it is possible to appropriately notify whether the power necessary for charging the mobile phone is stored in the secondary battery 3 without consuming as much power as possible from the secondary battery 3. Since the power consumption of the secondary battery 3 can be suppressed, the valuable charging energy collected by the solar battery 1 can be effectively used without waste for charging the mobile phone or emergency lighting in the event of a disaster.

ＤＣ−ＤＣコンバータ１０のスイッチング制御に周波数変調（ＰＦＭ）を採用しているので、当該ソーラ式携帯充電器が長期間にわたって使用されない状況では、ＤＣ−ＤＣコンバータ１０の出力電圧があるレベルまで下がった場合にのみスイッチングが行われる。このＤＣ−ＤＣコンバータ１０のスイッチングタイミングに合わせて二次電池３が不定期に放電する。この不定期の放電により、二次電池３の放電量をごく僅かに抑えながら、二次電池３を活性化させて、二次電池３の劣化を遅らせることができる。   Since frequency modulation (PFM) is adopted for the switching control of the DC-DC converter 10, the output voltage of the DC-DC converter 10 has dropped to a certain level when the solar portable charger is not used for a long period of time. Switching occurs only in cases. The secondary battery 3 is irregularly discharged in accordance with the switching timing of the DC-DC converter 10. By this irregular discharge, the secondary battery 3 can be activated and the deterioration of the secondary battery 3 can be delayed while suppressing the discharge amount of the secondary battery 3 very slightly.

仮に、ＤＣ−ＤＣコンバータ１０のスイッチング制御にパルス幅変調（ＰＷＭ）を採用されている場合を考えると、ＤＣ−ＤＣコンバータ１０の出力電圧を５Ｖ以上に維持するためにＤＣ−ＤＣコンバータ１０のスイッチングが定期的に繰り返されるので、二次電池３の放電回数が多くなる。この場合、放電によって二次電池３を活性化させることができるが、二次電池３の放電量が多くなるという不具合がある。   Considering the case where pulse width modulation (PWM) is employed in the switching control of the DC-DC converter 10, the switching of the DC-DC converter 10 is performed in order to maintain the output voltage of the DC-DC converter 10 at 5V or higher. Is periodically repeated, the number of discharges of the secondary battery 3 increases. In this case, the secondary battery 3 can be activated by discharge, but there is a problem that the discharge amount of the secondary battery 3 increases.

この発明は、上記実施形態そのままに限定されるものではなく、実施段階ではその要旨を逸脱しない範囲で構成要素を変形して具体化できる。また、上記実施形態に開示されている複数の構成要素の適宜な組み合わせにより種々の発明を形成できる。例えば、実施形態に示される全構成要素から幾つかの構成要素を削除してもよい。   The present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment.

この発明の一実施形態の構成を示す図。The figure which shows the structure of one Embodiment of this invention.

符号の説明Explanation of symbols

１…太陽電池、３…二次電池、８ａ，８ｂ…充電用端子、１０…ＤＣ−ＤＣコンバータ、２１…非常照明用の発光ダイオード、２３…自動復帰形の押釦式常開接点、２４…電圧レベル報知用の発光ダイオード、２６…ＮＰＮ型トランジスタ（第１トランジスタ）、３０…電圧判定回路、３１…抵抗（第１抵抗）、３２…（第２抵抗）、３３…ＮＰＮ型トランジスタ（第２トランジスタ）、３４…抵抗（第３抵抗）、４３…ＮＰＮ型トランジスタ（第３トランジスタ）、４５…抵抗（第４抵抗）   DESCRIPTION OF SYMBOLS 1 ... Solar cell, 3 ... Secondary battery, 8a, 8b ... Charging terminal, 10 ... DC-DC converter, 21 ... Light emitting diode for emergency lighting, 23 ... Automatic reset type pushbutton type normally open contact, 24 ... Voltage Light emitting diode for level notification, 26... NPN transistor (first transistor), 30... Voltage determination circuit, 31... Resistor (first resistor), 32. ), 34... Resistance (third resistance), 43... NPN transistor (third transistor), 45... Resistance (fourth resistance)

Claims (3)

太陽電池と、
前記太陽電池の出力により充電される二次電池と、
前記二次電池の電圧を所定レベルの直流電圧に変換するＤＣ−ＤＣコンバータと、
前記ＤＣ−ＤＣコンバータの出力端に接続された充電用端子と、
通電制御用スイッチと、
自動復帰形の押釦式常開接点と、
前記ＤＣ−ＤＣコンバータの出力端に、前記通電制御用スイッチおよび前記押釦式常開接点を介して接続された発光体と、
前記押釦式常開接点を介して前記二次電池に接続され、その押釦式常開接点のオン時に作動して、前記二次電池の電圧が設定レベル未満の場合に前記通電制御用スイッチをオンする電圧判定回路と、
を備えていることを特徴とするソーラ式携帯充電器。 Solar cells,
A secondary battery charged by the output of the solar cell;
A DC-DC converter that converts the voltage of the secondary battery into a DC voltage of a predetermined level;
A charging terminal connected to an output terminal of the DC-DC converter;
An energization control switch;
An automatic return pushbutton type normally open contact;
A light emitter connected to the output end of the DC-DC converter via the switch for energization control and the push button type normally open contact;
Connected to the secondary battery via the pushbutton-type normally open contact, operates when the pushbutton-type normally open contact is on, and turns on the energization control switch when the voltage of the secondary battery is below a set level. A voltage determination circuit to
A solar-type mobile charger characterized by comprising: 前記通電制御用スイッチは、前記発光体への通電路にコレクタ・エミッタ間が挿接された第１トランジスタである、
前記電圧判定回路は、前記押釦式常開接点を介して前記二次電池に接続された第１抵抗および第２抵抗の直列回路と、その第２抵抗にベース・エミッタ間が接続され且つコレクタ・エミッタ間が前記押釦式常開接点を介して前記ＤＣ−ＤＣコンバータの出力端に接続され、前記第２抵抗に生じる電圧が設定レベル以上でオンして設定レベル未満でオフする第２トランジスタと、前記押釦式常開接点を介して前記ＤＣ−ＤＣコンバータの出力端に接続されたコンデンサと、前記押釦式常開接点を介して前記二次電池に接続された第３抵抗および第３トランジスタのコレクタ・エミッタ間の直列回路とを有し、前記コンデンサに前記第３トランジスタのベース・エミッタ間を接続するとともに、その第３トランジスタのコレクタに第４抵抗を介して前記第１抵抗および第２抵抗の相互接続点を接続している、
ことを特徴とする請求項１に記載のソーラ式携帯充電器。 The energization control switch is a first transistor in which a collector and an emitter are inserted into an energization path to the light emitter.
The voltage determination circuit includes a series circuit of a first resistor and a second resistor connected to the secondary battery via the push button type normally open contact, a base-emitter connected to the second resistor, and a collector A second transistor whose emitter is connected to the output terminal of the DC-DC converter via the push-button normally open contact, and the voltage generated in the second resistor is turned on when the voltage is higher than a set level and turned off when the voltage is lower than the set level; A capacitor connected to the output terminal of the DC-DC converter via the push button type normally open contact, and a third resistor and a collector of a third transistor connected to the secondary battery via the push button type normally open contact A series circuit between the emitters, the base and the emitter of the third transistor are connected to the capacitor, and a fourth resistor is connected to the collector of the third transistor Connecting the interconnection point of said first resistor and second resistor,
The solar portable charger according to claim 1. 前記ＤＣ−ＤＣコンバータの出力端に前記押釦式常開接点を介して接続された非常照明用の発光体、をさらに備えていることを特徴とする請求項１に記載のソーラ式携帯充電器。 2. The solar portable charger according to claim 1, further comprising a light emitter for emergency lighting connected to the output end of the DC-DC converter via the pushbutton-type normally open contact.
JP2005317594A 2005-10-31 2005-10-31 Solar cell charger Expired - Fee Related JP4034800B2 (en)

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JP2005317594A JP4034800B2 (en) 2005-10-31 2005-10-31 Solar cell charger
TW095130983A TWI337793B (en) 2005-10-31 2006-08-23 Solar-type carrying charger
KR1020060082963A KR100841135B1 (en) 2005-10-31 2006-08-30 Solar-type carrying charger
CNB2006101266633A CN100433501C (en) 2005-10-31 2006-08-31 Solar energy type portable charger

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AT509609A4 (en) * 2010-04-28 2011-10-15 Lunatone Ind Elektronik Gmbh SOLAR OPERATED LED LIGHT

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CN102468518A (en) * 2010-11-17 2012-05-23 英业达股份有限公司 Battery module and electronic device applying same
CN103267258A (en) * 2013-05-23 2013-08-28 宁夏新航能源环境科技有限公司 Solar lighting device and method
KR20190092203A (en) 2018-01-29 2019-08-07 경문건 Apparatus for autonomous wireless charging with high hardware and cost efficiency
WO2020130162A1 (en) 2017-12-15 2020-06-25 경문건 Autonomous wireless charging system and method based on power loss tracking

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JP3070715B2 (en) * 1993-08-05 2000-07-31 三菱電機株式会社 Wireless switch
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JP3780502B2 (en) * 2002-01-15 2006-05-31 有限会社サンブリッジ Solar battery charger for mobile devices
JP4133924B2 (en) * 2004-05-14 2008-08-13 Ｎｅｃトーキン株式会社 Power supply

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT509609A4 (en) * 2010-04-28 2011-10-15 Lunatone Ind Elektronik Gmbh SOLAR OPERATED LED LIGHT
AT509609B1 (en) * 2010-04-28 2011-10-15 Lunatone Ind Elektronik Gmbh SOLAR OPERATED LED LIGHT

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KR100841135B1 (en) 2008-06-24
TWI337793B (en) 2011-02-21

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