Battery pack and battery pack checking method
First Claim
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1. A battery pack comprising:
- a rechargeable battery;
a management/control unit for managing/controlling the charge and discharge of said rechargeable battery,wherein said management/control unit comprises;
a current detecting resistor;
a charging current measuring section for measuring the charging current of said rechargeable battery that flows in the current detecting resistor;
a voltage detector for measuring the voltage of said rechargeable battery;
a temperature detector for measuring and detecting temperatures by means of a temperature sensor fitted to said rechargeable battery;
a charge control unit for receiving the outputs from said charging current measuring section, said voltage detector, and said temperature detector; and
a charge-and-discharge switch responsive to the charge control unit, and said charge control unit including a self-checking section for monitoring the charging and discharging operation of said rechargeable battery responsive to the output signals from at least one of said charging current measuring section and said voltage detector, and a charging capacity integrating section, and in self-checking performed by the self-checking section of said charge control unit, only charging capacity during charging is integrated, and trouble checking is executed at the rechargeable battery or management/control unit by checking whether or not the charming capacity integrated per charging is higher than a specified valued.
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Abstract
The present invention is a battery pack with BMU mounted in the control circuit for controlling battery voltage, etc. In order to avoid worsening of the battery pack durability due to failure of suspension of charging when full-charge detection or over-charge detection is not executed at all because of trouble in the battery voltage measuring section, the battery pack comprises a self-checking section which integrates the charging capacity during charging and detects whether or not the charging capacity is higher than a set-value and turns OFF the charging FET, thereby executing the trouble checking of charging capacity.
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Citations
32 Claims
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1. A battery pack comprising:
- a rechargeable battery;
a management/control unit for managing/controlling the charge and discharge of said rechargeable battery,wherein said management/control unit comprises;
a current detecting resistor;
a charging current measuring section for measuring the charging current of said rechargeable battery that flows in the current detecting resistor;
a voltage detector for measuring the voltage of said rechargeable battery;
a temperature detector for measuring and detecting temperatures by means of a temperature sensor fitted to said rechargeable battery;
a charge control unit for receiving the outputs from said charging current measuring section, said voltage detector, and said temperature detector; and
a charge-and-discharge switch responsive to the charge control unit, andsaid charge control unit including a self-checking section for monitoring the charging and discharging operation of said rechargeable battery responsive to the output signals from at least one of said charging current measuring section and said voltage detector, and a charging capacity integrating section, and in self-checking performed by the self-checking section of said charge control unit, only charging capacity during charging is integrated, and trouble checking is executed at the rechargeable battery or management/control unit by checking whether or not the charming capacity integrated per charging is higher than a specified valued. - View Dependent Claims (2, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 18, 19, 22, 23, 26, 27, 30, 31)
- a rechargeable battery;
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3. A battery pack comprising:
- a rechargeable battery;
a management/control unit for managing/controlling the charge and discharge of said rechargeable battery,wherein said management/control unit comprises;
a current detecting resistor;
a charging current measuring section for measuring the charging current of said rechargeable battery that flows in the current detecting resistor;
a voltage detector for measuring the voltage of said rechargeable battery;
a temperature detector for measuring and detecting temperatures by means of a temperature sensor fitted to said rechargeable battery;
a charge control unit for receiving the outputs from said charging current measuring section, said voltage detector, and said temperature detector; and
a charge-and-discharge switch responsive to the charge control unit, andsaid charge control unit including a self-checking section for monitoring the charging and discharging operation of said rechargeable battery responsive to the output signals from at least one of said charging current measuring section and said voltage detector and wherein the charge control unit includes a remaining capacity managing section capable of integrating remaining capacity until establishment of a full-charge condition, said battery pack performing trouble checking by determining whether said integrated remaining capacity goes above a specified value during charging. - View Dependent Claims (4, 16, 17, 20, 21, 24, 25, 28, 29)
- a rechargeable battery;
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32. A battery pack comprising:
- a rechargeable battery;
a management unit for managing and controlling the charge and discharge of the rechargeable battery, said management unit comprising;a switch for controlling the charge and discharge of the rechargeable battery;
a self-checking section;
a current detector for detecting current flowing in the battery and providing a first output signal to the self-checking section relating to the current;
a voltage detector for measuring the voltage of the battery and providing a second signal to the self-checking section related to the voltage;
a charging capacity integration section for integrating charging capacity and for providing a third output signal responsive to an upper limit of integrated capacity;
wherein the self-checking section turns-off the switch, upon termination of current detection and voltage detection, in response to the third signal.
- a rechargeable battery;
Specification