JP2011010478A5

JP2011010478A5 -

Info

Publication number: JP2011010478A5
Application number: JP2009152037A
Authority: JP
Filing date: 2009-06-26
Publication date: 2012-07-26
Anticipated expiration: 2029-06-26

Description

上記目的を達成するため、本発明は、
発電手段と、
該発電手段に対してそれぞれ並列に接続された第１蓄電手段、該第１蓄電手段より容量の小さな第２蓄電手段、および、装置の機能を実現する機能回路と、
閉成状態から開成状態に切り替わることで、前記機能回路および前記第２蓄電手段を前記発電手段および前記第１蓄電手段から切り離すことが可能な第１スイッチ手段と、
閉成状態から開成状態に切り替わることで、前記第１蓄電手段を前記発電手段、前記第２蓄電手段および前記機能回路から切り離すことが可能な第２スイッチ手段と、
前記第１蓄電手段の端子電圧と前記第２蓄電手段の端子電圧とを比較する第１比較器と、
前記機能回路を駆動可能な電源電圧である第１閾値電圧と前記第２蓄電手段の端子電圧とを比較する第２比較器と、
前記第１比較器の出力に基づき前記第１スイッチ手段と前記第２スイッチ手段との切り替えを制御する論理手段と、
を備え、
前記論理手段は、
前記第１蓄電手段の端子電圧が前記第２蓄電手段の端子電圧より大きい場合に前記第１スイッチ手段を閉成状態に、前記第２スイッチ手段を開成状態に切り替えるとともに、
前記第１蓄電手段の端子電圧が前記第２蓄電手段の端子電圧より小さい場合に前記第１スイッチ手段を開成状態に、前記第２スイッチ手段を閉成状態に切り替え、
前記第２比較器の出力に基づき前記第２蓄電手段の端子電圧が前記第１閾値電圧より低い場合に、前記第１比較器の出力に基づく前記第１スイッチ手段の切り替え制御を解除して、前記第１スイッチ手段を常に閉成状態とすることを特徴とする電子装置である。 In order to achieve the above object, the present invention provides:
Power generation means;
A first power storage means connected in parallel to the power generation means, a second power storage means having a smaller capacity than the first power storage means, and a functional circuit for realizing the function of the device;
A first switch means capable of disconnecting the functional circuit and the second power storage means from the power generation means and the first power storage means by switching from the closed state to the open state;
A second switch means capable of disconnecting the first power storage means from the power generation means, the second power storage means and the functional circuit by switching from the closed state to the open state;
A first comparator for comparing the terminal voltage of the first power storage means and the terminal voltage of the second power storage means;
A second comparator that compares a first threshold voltage, which is a power supply voltage capable of driving the functional circuit, with a terminal voltage of the second power storage means;
Logic means for controlling switching between the first switch means and the second switch means based on the output of the first comparator;
With
The logic means is
When the terminal voltage of the first power storage means is larger than the terminal voltage of the second power storage means, the first switch means is switched to the closed state, and the second switch means is switched to the open state.
When the terminal voltage of the first power storage means is smaller than the terminal voltage of the second power storage means, the first switch means is switched to the open state, and the second switch means is switched to the closed state ;
When the terminal voltage of the second power storage means is lower than the first threshold voltage based on the output of the second comparator, the switching control of the first switch means based on the output of the first comparator is canceled, The electronic device is characterized in that the first switch means is always closed .

Claims

Power generation means;
A first power storage means connected in parallel to the power generation means, a second power storage means having a smaller capacity than the first power storage means, and a functional circuit for realizing the function of the device;
A first switch means capable of disconnecting the functional circuit and the second power storage means from the power generation means and the first power storage means by switching from the closed state to the open state;
A second switch means capable of disconnecting the first power storage means from the power generation means, the second power storage means and the functional circuit by switching from the closed state to the open state;
A first comparator for comparing the terminal voltage of the first power storage means and the terminal voltage of the second power storage means;
A second comparator that compares a first threshold voltage, which is a power supply voltage capable of driving the functional circuit, with a terminal voltage of the second power storage means;
Logic means for controlling switching between the first switch means and the second switch means based on the output of the first comparator;
With
The logic means is
When the terminal voltage of the first power storage means is larger than the terminal voltage of the second power storage means, the first switch means is switched to the closed state, and the second switch means is switched to the open state.
When the terminal voltage of the first power storage means is smaller than the terminal voltage of the second power storage means, the first switch means is switched to the open state, and the second switch means is switched to the closed state ;
When the terminal voltage of the second power storage means is lower than the first threshold voltage based on the output of the second comparator, the switching control of the first switch means based on the output of the first comparator is canceled, An electronic apparatus characterized in that the first switch means is always closed .

Detecting means for detecting a charge level of the first power storage means;
First control means for switching between stopping and continuing the operation of the first comparator and the second comparator;
The first control means includes
When the charge level of the first power storage means is at a normal use level based on the detection of the detection means, the first comparator and the second comparator are operated, while the charge level of the first power storage means is 2. The electronic device according to claim 1 , wherein the operation of the first comparator and the second comparator is stopped when it is at a charge level that limits the discharge of the first power storage means.

A second control means capable of forcibly switching the first switch means and the second switch means to a closed state;
The second control means includes
Any one of claims 1-2, characterized in that the forced closed state and the first switching means and said second switching means when the predetermined operation mode in which load increases the functional circuit The electronic device according to item.

The first power storage means is a secondary battery;
The electronic device according to claim 1, wherein the second power storage unit is a capacitor.

The electronic device according to claim 1 , wherein the functional circuit performs an operation related to a clock function.