Battery pack, method of measuring voltage of the battery pack, and energy storage system including the battery pack
First Claim
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1. A battery system comprising:
- a battery comprising at least one battery cell;
a division circuit configured to receive a first voltage of the battery, generate a second voltage from the first voltage, and output the second voltage;
an isolation circuit coupled between the battery and the division circuit, the isolation circuit being configured to electrically isolate the battery from the division circuit according to a control signal; and
a battery management system coupled to the division circuit, the battery management system comprising;
an isolation circuit control unit configured to generate the control signal;
a measuring unit configured to measure the second voltage;
a monitoring unit configured to monitor a state of the battery and to generate battery state information; and
a control unit configured to receive the battery state information, and control the isolation circuit control unit to selectively provide the control signal according to the battery state information, whereinthe isolation circuit is configured to electrically isolate the battery from the division circuit when the control signal is not provided,the battery state information comprises a charging/discharging rate of the battery or a noise signal from the battery,the monitoring unit is configured to monitor the charging/discharging rate of the battery or the noise signal from the battery, andthe control unit is configured to compare the charging/discharging rate or the noise signal to a corresponding reference value, and to control the isolation circuit control unit to provide the control signal for a time substantially less than a time when the control signal is not provided when the charging/discharging rate or the noise signal is greater than the corresponding reference value.
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Abstract
A battery system including: a battery, which includes at least one battery cell; a division circuit configured to receive a first voltage of the battery, generate a second voltage from the first voltage, and output the second voltage; an isolation circuit coupled between the battery and the division circuit, the isolation circuit being configured to electrically isolate the battery from the division circuit according to a control signal; and a battery management system coupled to the division circuit. The battery management system includes an isolation circuit control unit configured to generate the control signal; and a measuring unit configured to measure the second voltage.
16 Citations
12 Claims
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1. A battery system comprising:
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a battery comprising at least one battery cell; a division circuit configured to receive a first voltage of the battery, generate a second voltage from the first voltage, and output the second voltage; an isolation circuit coupled between the battery and the division circuit, the isolation circuit being configured to electrically isolate the battery from the division circuit according to a control signal; and a battery management system coupled to the division circuit, the battery management system comprising; an isolation circuit control unit configured to generate the control signal; a measuring unit configured to measure the second voltage; a monitoring unit configured to monitor a state of the battery and to generate battery state information; and a control unit configured to receive the battery state information, and control the isolation circuit control unit to selectively provide the control signal according to the battery state information, wherein the isolation circuit is configured to electrically isolate the battery from the division circuit when the control signal is not provided, the battery state information comprises a charging/discharging rate of the battery or a noise signal from the battery, the monitoring unit is configured to monitor the charging/discharging rate of the battery or the noise signal from the battery, and the control unit is configured to compare the charging/discharging rate or the noise signal to a corresponding reference value, and to control the isolation circuit control unit to provide the control signal for a time substantially less than a time when the control signal is not provided when the charging/discharging rate or the noise signal is greater than the corresponding reference value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An energy storage system comprising:
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a power control system; and a battery system coupled to the power control system and comprising; a battery comprising at least one battery cell; a division circuit configured to receive a voltage of the battery, to generate a divided voltage from the voltage of the battery; and
to output the divided voltage;an isolation circuit coupled between the battery and the division circuit, the isolation circuit being configured to electrically isolate the battery from the division circuit according to a control signal; and a battery management system coupled to the division circuit, the battery management system being configured to monitor a state of the battery, to generate the control signal according to the state of the battery, to receive the divided voltage, and to calculate a total voltage of the battery from the divided voltage, wherein the energy storage system is configured to store a power generated by a power generation system or a grid in the battery, and supply the power stored in the battery to a load or the grid, the power control system is configured to convert power of at least one of the power generation system, the grid, or the battery, and the battery management system is configured to monitor a charging/discharging rate of the battery or a noise signal from the battery, to compare the charging/discharging rate or the noise signal to a corresponding reference value, and to provide the control signal to electrically couple the battery to the division circuit for a time substantially less than a time when the control signal is not provided when the charging/discharging rate or the noise signal is greater than the corresponding reference value. - View Dependent Claims (12)
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Specification