Apparatus and method for monitoring battery pack
First Claim
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1. A battery pack monitoring apparatus comprising:
- a bare cell adapted to be charged or discharged with a voltage;
a voltage sensor adapted to sense a charging voltage or a discharging voltage of the bare cell and output a sensed charging voltage or a sensed discharging voltage as a first electrical signal;
a current sensor adapted to sense a charging current or a discharging current of the bare cell and output a sensed charging current or a sensed discharging current as a second electrical signal;
a charging switch and a discharging switch coupled between the bare cell and an external terminal;
a switch temperature sensor near the charging switch and the discharging switch, the switch temperature sensor adapted to sense a temperature of the charging switch or the discharging switch, and convert the sensed temperature into a third electrical signal;
a control unit adapted to convert the first electrical signal, the second electrical signal, and the third electrical signal into a respective first digital signal, second digital signal and a third digital signal, operate and process the first digital signal, the second digital signal and the third digital signal in accordance with a control command, and calculate a battery capacity with reference to the first electrical signal, the second electrical signal and the third electrical signal; and
a data storage unit adapted to store sensed charging voltage data or sensed discharging voltage data, sensed charging current data or sensed discharging current data, sensed temperature data of the charging switch or the discharging switch and calculated battery capacity data of the bare cell processed by the control unit.
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Abstract
A battery pack monitoring apparatus for and method of monitoring various characteristics of the battery pack such that when the battery pack malfunctions, the exact reason for the malfunction can be grasped. The apparatus includes a bare cell adapted to be charged/discharged with a predetermined voltage; a voltage sensor for sensing a charging/discharging voltage of the bare cell and outputting the voltage as a predetermined electrical signal; a current sensor for sensing a charging/discharging current of the bare cell and outputting the current as a predetermined electrical signal; a control unit, a current sensor, and a data storage unit.
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Citations
22 Claims
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1. A battery pack monitoring apparatus comprising:
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a bare cell adapted to be charged or discharged with a voltage; a voltage sensor adapted to sense a charging voltage or a discharging voltage of the bare cell and output a sensed charging voltage or a sensed discharging voltage as a first electrical signal; a current sensor adapted to sense a charging current or a discharging current of the bare cell and output a sensed charging current or a sensed discharging current as a second electrical signal; a charging switch and a discharging switch coupled between the bare cell and an external terminal; a switch temperature sensor near the charging switch and the discharging switch, the switch temperature sensor adapted to sense a temperature of the charging switch or the discharging switch, and convert the sensed temperature into a third electrical signal; a control unit adapted to convert the first electrical signal, the second electrical signal, and the third electrical signal into a respective first digital signal, second digital signal and a third digital signal, operate and process the first digital signal, the second digital signal and the third digital signal in accordance with a control command, and calculate a battery capacity with reference to the first electrical signal, the second electrical signal and the third electrical signal; and a data storage unit adapted to store sensed charging voltage data or sensed discharging voltage data, sensed charging current data or sensed discharging current data, sensed temperature data of the charging switch or the discharging switch and calculated battery capacity data of the bare cell processed by the control unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 20, 21, 22)
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13. A method for monitoring a battery pack comprising:
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sensing a charging voltage of a bare cell and outputting a sensed charging voltage signal; sensing a charging current of the bare cell and outputting a sensed charging current signal; sensing a temperature of the bare cell and outputting a sensed temperature of the bare cell signal; sensing a temperature of a charging switch or a discharging switch and outputting a sensed temperature of the charging switch or the discharging switch signal at an interval when the bare cell is charged or discharged; and storing sensed charging voltage data, sensed charging current data, sensed temperature data of the bare cell and sensed temperature data of the charging switch or the discharging switch together with a calculated battery capacity data. - View Dependent Claims (14, 15, 16)
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17. A method for monitoring a battery pack comprising:
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sensing a discharging voltage of a bare cell and outputting a sensed discharging voltage signal, sensing a discharging current of the bare cell and outputting a sensed discharging current signal; sensing a temperature of the bare cell and outputting a sensed temperature signal; sensing a temperature of a charging switch or a discharging switch at an interval when the bare cell is coupled to an external set and outputting a sensed temperature of a charging switch or a discharging switch signal; and storing sensed discharging voltage data of the bare cell, sensed discharging current data, sensed temperature data of the bare cell, sensed temperature data of the charging switch or the discharging switch and previously-calculated battery capacity data. - View Dependent Claims (18, 19)
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Specification