BATTERY SYSTEM, CONTROLLING METHOD OF THE SAME, AND POWER STORAGE SYSTEM INCLUDING THE BATTERY PACK
First Claim
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1. A method of controlling a battery system comprising a plurality of batteries, the method comprising:
- classifying batteries subject to cell balancing from the plurality of batteries;
selecting a battery from the plurality of batteries by using a multiplexer; and
when the battery selected by the multiplexer is subject to cell balancing, performing cell balancing on the selected battery.
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Abstract
A battery system, a method of controlling the battery system, and an energy storage system including the battery system are disclosed. The method of controlling the battery system includes steps of selecting one of the plurality of batteries by using a multiplexer; measuring a voltage of the selected battery; and calculating a charging capacity of the battery based on the measured voltage. Accordingly, cell balancing may be efficiently performed.
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Citations
18 Claims
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1. A method of controlling a battery system comprising a plurality of batteries, the method comprising:
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classifying batteries subject to cell balancing from the plurality of batteries; selecting a battery from the plurality of batteries by using a multiplexer; and when the battery selected by the multiplexer is subject to cell balancing, performing cell balancing on the selected battery. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A battery system, comprising:
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a plurality of batteries; a selection circuit unit comprising a multiplexer that selects a battery from the plurality of batteries; a sensing circuit unit measuring a voltage of the selected battery; a balancing circuit unit performing cell balancing on the selected battery if the selected battery is determined subject to cell balancing; and a control unit controlling cell balancing by calculating charging capacities of the batteries based on the measured voltage of the plurality of batteries and classifying batteries subject to cell balancing. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. An energy storage system comprising a battery system including a plurality of batteries and connecting the battery system to an external power source to supply power to a load, the energy storage system comprising:
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a battery selecting unit that selects a battery by using a multiplexer; a capacity measuring unit that measures a voltage of the battery selected by using the multiplexer and calculates a charging capacity of the battery based on the measured voltage; a reference value setting unit that determines a charging capacity reference value based on the calculated charging capacity; and a balancing control unit that classifies batteries subject to cell balancing based on the calculated charging capacity and the determined charging capacity reference value and performs cell balancing on the classified batteries.
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Specification