JPH06197461A - Electronic device - Google Patents

Electronic device

Info

Publication number
JPH06197461A
JPH06197461A JP34024792A JP34024792A JPH06197461A JP H06197461 A JPH06197461 A JP H06197461A JP 34024792 A JP34024792 A JP 34024792A JP 34024792 A JP34024792 A JP 34024792A JP H06197461 A JPH06197461 A JP H06197461A
Authority
JP
Japan
Prior art keywords
battery
secondary battery
electronic device
switch
external
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
JP34024792A
Other languages
Japanese (ja)
Inventor
Masami Tsunoda
正美 角田
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP34024792A priority Critical patent/JPH06197461A/en
Publication of JPH06197461A publication Critical patent/JPH06197461A/en
Pending legal-status Critical Current

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  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

PURPOSE:To make an electronic device lightweight, by taking off a terminal and an external battery when a stored energy of the external battery is reduced and an output voltage is lowered to a given value. CONSTITUTION:A first secondary battery 101 connected to a switch 103, which is opened or closed according to a control signal 103, is incorporated in a main electronic device. On the other hand, the main electronic device is connected to an external second secondary battery 102 through a switch 104, which is opened or closed according to a switch control signal 107, and a connector 105. The switch 104 is closed by the switch control signal 107, and the power is supplied from the second secondary battery 102 through a power feeding line 108. When a decrease in voltage of the second secondary battery 102 is detected by a low-voltage detecting circuit 110 and a low-voltage signal 111 is generated from the low-voltage detecting circuit 110 to the main electronic device, the switch 104 is turned off and the second secondary battery 102 is detached. Then, the switch 103 is turned on and the first secondary battery 101 is connected. In this way, a light-weight, portable electronic device can be provided.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、２次電池などの電池を
電源とする電子装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device powered by a battery such as a secondary battery.

【０００２】[0002]

【従来の技術】従来、２つの２次電池を利用する電子装
置においては、２つの２次電池を並列接続していた。2. Description of the Related Art Conventionally, in an electronic device utilizing two secondary batteries, two secondary batteries have been connected in parallel.

【０００３】[0003]

【発明が解決しようとする課題】しかしながら、このよ
うな従来の接続形態では、内部の２次電池も外部の２次
電池も使用してゆくにつれて同様に減少していく。すな
わち、当該装置を最大使用時間にわたって使用可能とす
るためには、外付けの２次電池も最後まで装着しておか
ねばならない。殊に携帯用機器では、このことにより重
量がかさんでしまうことになる。However, in such a conventional connection mode, both the internal secondary battery and the external secondary battery are reduced as they are used. That is, in order to allow the device to be used for the maximum usage time, an external secondary battery must be installed to the end. Especially for portable devices, this adds weight.

【０００４】よって本発明の目的は上述の点に鑑み、常
に外付けの電池を必要とすることなく、最大使用時間に
わたった使用を可能とした電子装置を提供することにあ
る。Therefore, in view of the above points, an object of the present invention is to provide an electronic device which can be used for a maximum usage time without always requiring an external battery.

【０００５】[0005]

【課題を解決するための手段】かかる目的を達成するた
め、本発明は電池を用いた電源供給方式を採る電子装置
において、装置内に内蔵された第１の電池と、脱着可能
な第２の電池と、前記第２の電池の電源供給能力を検出
する検出手段と、前記第２の電池の電源供給能力が良好
のときに、前記第１の電池による電源供給を断ち、前記
第２の電池から電源供給を行う切替手段とを具備したも
のである。In order to achieve the above object, the present invention provides an electronic device adopting a power supply system using a battery, in which a first battery incorporated in the device and a detachable second battery are incorporated. A battery, a detection unit that detects the power supply capability of the second battery, and when the power supply capability of the second battery is good, the power supply from the first battery is cut off, and the second battery And a switching means for supplying power from the power source.

【０００６】[0006]

【作用】本発明の上記構成によれば、外部の電池が接続
されている場合、この電池容量を検査して十分な容量が
残っている限り内部の電池の電源供給を断ち、この電池
を最初に使用してしまうことができる。According to the above configuration of the present invention, when an external battery is connected, the battery capacity is inspected, and as long as a sufficient capacity remains, the power supply to the internal battery is cut off, and this battery is first connected. Can be used for.

【０００７】[0007]

【実施例】以下、本発明の実施例を詳細に説明する。EXAMPLES Examples of the present invention will be described in detail below.

【０００８】図１は、本発明の一実施例を示すブロック
図である。本図において、１０１は、第１の２次電池で
あり電子装置の内部に内蔵されている。１０２は、第２
の２次電池であり、外付けの外部２次電池である。FIG. 1 is a block diagram showing an embodiment of the present invention. In the figure, 101 is a first secondary battery, which is built in the electronic device. 102 is the second
The secondary battery is an external external secondary battery.

【０００９】１０３は、第１の２次電池１０１の供給を
制御するスイッチである。１０４は、第２の２次電池１
０２の電源供給をする制御するスイッチである。Reference numeral 103 is a switch for controlling the supply of the first secondary battery 101. 104 is the second secondary battery 1
02 is a control switch for supplying power.

【００１０】１０５は、外付け２次電池１０２を着脱す
るためのコネクタである。１０６は、スイッチ１０３の
オンオフを制御する第１の制御信号である。１０７は、
スイッチ１０４のオンオフを制御する第２の制御信号で
ある。Reference numeral 105 is a connector for attaching and detaching the external secondary battery 102. Reference numeral 106 is a first control signal for controlling on / off of the switch 103. 107 is
This is a second control signal for controlling on / off of the switch 104.

【００１１】１０８は、電子装置に電源を供給する電源
供給線である。１０９は、第２の２次電池１０２の電圧
出力線である。１１０は、出力線１０９の電位を検出す
る低電圧検出回路である。１１１は、第２の２次電池１
０２の低電圧検出出力信号である。ここで、１０６，１
０７，１１１の各信号は、図示しない制御回路に接続さ
れている。Reference numeral 108 is a power supply line for supplying power to the electronic device. 109 is a voltage output line of the second secondary battery 102. Reference numeral 110 is a low voltage detection circuit that detects the potential of the output line 109. 111 is the second secondary battery 1
02 is a low voltage detection output signal. Where 106,1
The signals 07 and 111 are connected to a control circuit (not shown).

【００１２】次に、本実施例の動作について説明する。
図２は、図１に示した各部の信号波形を示す。Next, the operation of this embodiment will be described.
FIG. 2 shows the signal waveform of each part shown in FIG.

【００１３】初めに、第２の２次電池１０２は十分に充
電されているものとする。当初、信号１０６はオフ状
態、信号１０７はオン状態にある。また信号１１１は
偽、すなわち第２の２次電池１０２に十分な供給能力が
あることを示しているものとする。First, it is assumed that the second secondary battery 102 is sufficiently charged. Initially, the signal 106 is in the off state and the signal 107 is in the on state. Further, it is assumed that the signal 111 is false, that is, it indicates that the second secondary battery 102 has sufficient supply capacity.

【００１４】すなわち、スイッチ１０４はオンされてい
るので、第２の２次電池１０２の電圧は、コネクタ１０
５およびスイッチ１０４を介して、電源供給線１０８に
供給される。That is, since the switch 104 is turned on, the voltage of the second secondary battery 102 is
5 and the switch 104, and is supplied to the power supply line 108.

【００１５】電子装置を使用していると電源消費が生じ
るため、第２の２次電池１０２の出力電圧は図２の波形
のごとく次第に降下する。そして電圧がある一定値以下
に下がると、低電圧検出回路１１０の出力信号が、真の
状態となる。この信号が真となると、電子装置本体に内
蔵されている制御回路（図示せず）は、制御信号１０６
をオン状態とする。これと同時に、制御信号１０７をオ
フ状態とする。すると、第２の２次電池１０２の出力
は、スイッチ１０４によって阻止される。Since power consumption occurs when an electronic device is used, the output voltage of the second secondary battery 102 gradually drops as shown in the waveform of FIG. When the voltage drops below a certain value, the output signal of the low voltage detection circuit 110 becomes true. When this signal becomes true, the control circuit (not shown) built in the electronic device body causes the control signal 106
Is turned on. At the same time, the control signal 107 is turned off. Then, the output of the second secondary battery 102 is blocked by the switch 104.

【００１６】そして、スイッチ１０３が導通状態とな
り、電源供給線１０８に第１の２次電池１０１の電圧が
供給されるようになる。この状態になると、外部電池１
０２を外すことが可能となる。Then, the switch 103 is turned on, and the voltage of the first secondary battery 101 is supplied to the power supply line 108. In this state, the external battery 1
It is possible to remove 02.

【００１７】以上が、本実施例の動作である。The above is the operation of the present embodiment.

【００１８】[0018]

【発明の効果】以上説明したとおり本発明によれば、外
付け電池を最初に使用してしまう構成としてあるので、
外付け電池の使用後は、外付け電池を外して内部２次電
池のみで使用することにより、最大使用時間を損なわず
に、装置全体を軽量化することができる。これは、携帯
型の装置にとって、特に有利になる。As described above, according to the present invention, since the external battery is used first,
After using the external battery, by removing the external battery and using only the internal secondary battery, it is possible to reduce the weight of the entire device without impairing the maximum usage time. This is especially advantageous for portable devices.

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

【図１】本発明の一実施例を示すブロック図である。FIG. 1 is a block diagram showing an embodiment of the present invention.

【図２】図１の動作を示す波形図である。FIG. 2 is a waveform diagram showing the operation of FIG.

【符号の説明】[Explanation of symbols]

１０１ 第１の２次電池 １０２ 第２の２次電池 １０３，１０４ スイッチ １０５ コネクタ １０６，１０７ スイッチの制御信号 １０８ 電源供給線 １１０ 低電圧検出回路 １１１ 低電圧検出信号 101 First Secondary Battery 102 Second Secondary Battery 103, 104 Switch 105 Connector 106, 107 Switch Control Signal 108 Power Supply Line 110 Low Voltage Detection Circuit 111 Low Voltage Detection Signal

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 電池を用いた電源供給方式を採る電子装
置において、 装置内に内蔵された第１の電池と、 脱着可能な第２の電池と、 前記第２の電池の電源供給能力を検出する検出手段と、 前記第２の電池の電源供給能力が良好のときに、前記第
１の電池による電源供給を断ち、前記第２の電池から電
源供給を行う切替手段とを具備したことを特徴とする電
子装置。1. An electronic device adopting a power supply system using a battery, wherein a first battery incorporated in the device, a removable second battery, and a power supply capability of the second battery are detected. And a switching unit that cuts off the power supply from the first battery and supplies power from the second battery when the power supply capacity of the second battery is good. And electronic device. 【請求項２】 請求項１において、前記第２の電池の電
源供給能力が不足したときには、前記第１の電池から電
源供給することを特徴とする電子装置。2. The electronic device according to claim 1, wherein when the power supply capacity of the second battery is insufficient, power is supplied from the first battery.
JP34024792A 1992-12-21 1992-12-21 Electronic device Pending JPH06197461A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP34024792A JPH06197461A (en) 1992-12-21 1992-12-21 Electronic device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP34024792A JPH06197461A (en) 1992-12-21 1992-12-21 Electronic device

Publications (1)

Publication Number Publication Date
JPH06197461A true JPH06197461A (en) 1994-07-15

Family

ID=18335111

Family Applications (1)

Application Number Title Priority Date Filing Date
JP34024792A Pending JPH06197461A (en) 1992-12-21 1992-12-21 Electronic device

Country Status (1)

Country Link
JP (1) JPH06197461A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006129626A (en) * 2004-10-29 2006-05-18 Nec Corp Portable communication device and battery switching method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006129626A (en) * 2004-10-29 2006-05-18 Nec Corp Portable communication device and battery switching method
JP4617829B2 (en) * 2004-10-29 2011-01-26 日本電気株式会社 Portable communication device and battery switching method

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