Secondary battery pack
First Claim
1. A secondary battery pack comprising:
- terminal means connected to an external device;
rechargeable battery means for storing and utilizing electric charges;
switching means for switching operations of said rechargeable battery means between a charge operation and a discharge operation;
detecting means connected to said terminal means for detecting whether a charge operation or a discharge operation is to be carried out;
control means for controlling the switching of said switching means in response to a detection of said detecting means;
first power-source switching means for switching a supply of a power source to said control means and controlled in response to the charge operation or the discharge operation detected by said detecting means; and
second power-source switching means for switching the supply of the power source to said control means and controlled in response to the charge operation or the discharge operation detected by said detecting means.
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Accused Products
Abstract
A secondary battery pack includes terminals connected to an external device, a rechargeable battery for storing and utilizing electric charges, a switching circuit for switching a state of the rechargeable battery between a charge state and a discharge state, a charge/discharge state detecting circuit for detecting a mode signal indicating that a charge operation or a discharge operation is to be carried out, a control circuit for controlling an operation of the switching circuit, a first power-source switching circuit which switches a supply of a power source to the control circuit and is controlled in response to a mode detected by the charge/discharge state detecting circuit, and a second power-source switching circuit which switches a supply of a power source to the control circuit and is controlled in response to a mode detected by the charge/discharge state detecting circuit.
66 Citations
26 Claims
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1. A secondary battery pack comprising:
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terminal means connected to an external device; rechargeable battery means for storing and utilizing electric charges; switching means for switching operations of said rechargeable battery means between a charge operation and a discharge operation; detecting means connected to said terminal means for detecting whether a charge operation or a discharge operation is to be carried out; control means for controlling the switching of said switching means in response to a detection of said detecting means; first power-source switching means for switching a supply of a power source to said control means and controlled in response to the charge operation or the discharge operation detected by said detecting means; and second power-source switching means for switching the supply of the power source to said control means and controlled in response to the charge operation or the discharge operation detected by said detecting means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A secondary battery pack comprising:
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terminal means connected to an external device; rechargeable battery means for storing and utilizing electric charges; first switching means for controlling a current used to charge said rechargeable battery means in a charge operation; second switching means for controlling a current used to discharge said rechargeable battery means in a discharge operation; detecting means for detecting whether the charge operation or the discharge operation is to be carried out; and control means for controlling switching of said first and second switching means in response to a detection by said detecting means, wherein a power supply terminal of said control means is connected between said first switching means and said second switching means. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A method of controlling charge/discharge operations of a secondary battery pack, comprising the steps of:
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detecting a connection to one of a load apparatus and a charger; detecting whether a charge mode or discharge mode is to be operated; and setting a switching circuit in a predetermined state, wherein when said charge mode is detected, power from a power source is supplied by said charger to a control circuit and said switching circuit is set in said charge mode, and wherein when said discharge mode is detected, power from the power source is supplied by the secondary battery to said control circuit and said switching circuit is set in said discharge mode.
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20. A method of controlling charge/discharge operations of a secondary battery pack, comprising the steps of:
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detecting a connection to one of a load apparatus and a charger; detecting whether a charge mode or discharge mode is to be operated; and setting a switching circuit in a predetermined state, wherein when said charge mode is detected, power from a power source is supplied to a control circuit by said charger, a voltage of a secondary battery is detected and said switching circuit is set in said charge mode when said detected battery voltage is higher than a reference voltage, and wherein when said discharge mode is detected, power from the power source is supplied to a control circuit by said secondary battery, a voltage of said secondary battery is detected, and said switching circuit is set in said discharge mode. - View Dependent Claims (21, 22, 23, 24, 25)
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26. An electronic apparatus having a secondary battery, comprising:
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a secondary battery pack including; terminal means connected to an external device; rechargeable battery means for storing and utilizing electric charges corresponding to a charge operation and a discharge operation, respectively; switching means for switching between the charge operation and the discharge operation of said rechargeable battery means; detecting means for detecting whether the charge operation or the discharge operation is to be carried out; control means for controlling said switching means in response to a detection of said detecting means; first power switching means for switching a supply of a power source to said control means and controlled in response to the charge operation or the discharge operating detected by said detecting means; and second power switching means for switching a supply of the power source to said control means and controlled in response to the charge operation or the discharge operation detected by said charge/discharge state detecting means; battery terminal means connected to said secondary battery pack; external power-supply terminal means connected to an external power supply; and functional circuit means connected to one of said battery terminal means and said external power supply terminal means for carrying out a predetermined operation of said rechargeable battery means.
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Specification