Battery system and energy storage system including the same
First Claim
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1. A battery system, comprising:
- at least one battery module that has the capacity of being charged and discharged; and
a battery management unit that controls charging and discharging of the at least one battery module,wherein the battery management unit determines a count value and varies a charge limit value for stopping the charging of the at least one battery module and a discharge limit value for stopping the discharging of the at least one battery module based on the count value, said count value is a number of times the at least one battery module has been charged and discharged since manufacture of the at least one battery module and increases by one count for each charge and discharge cycle, andwherein the battery management unit determines a speed of decrease of performance of the at least one battery module in accordance with the count value and determine an increment of a width between the charge limit value and the discharge limit value in accordance with the speed of decrease of performance of the at least one battery module.
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Abstract
A battery system and an energy storage system including a battery module. The battery system includes at least one battery module that may perform charging and discharging, and a battery management unit that controls the charging and the discharging of the battery module. The battery management unit varies a charge limit value for stopping the charging of the battery module and a discharge limit value for stopping the discharging of the battery module. Accordingly, a lifetime of the battery module is extended.
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Citations
14 Claims
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1. A battery system, comprising:
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at least one battery module that has the capacity of being charged and discharged; and a battery management unit that controls charging and discharging of the at least one battery module, wherein the battery management unit determines a count value and varies a charge limit value for stopping the charging of the at least one battery module and a discharge limit value for stopping the discharging of the at least one battery module based on the count value, said count value is a number of times the at least one battery module has been charged and discharged since manufacture of the at least one battery module and increases by one count for each charge and discharge cycle, and wherein the battery management unit determines a speed of decrease of performance of the at least one battery module in accordance with the count value and determine an increment of a width between the charge limit value and the discharge limit value in accordance with the speed of decrease of performance of the at least one battery module. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An energy storage system, comprising:
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a battery system that supplies power to the external power source/load and stores power supplied from an external power source/load; and a power conversion system that converts first power stored in the battery system into second power required by the external power source/load and converts the second power supplied from the external power source/load into the first power required by the battery system, wherein the battery system comprises; at least one battery module that is capable of being charged and discharged; and a battery management unit determines a count value and controls charging and discharging of the at least one battery module, and varies a charge limit value for stopping the charging of the at least one battery module and a discharge limit value for stopping the discharging of the battery module based on the count value equaling or exceeding a predetermined value, said count value is a number of times the at least one battery module has been charged and discharged since manufacture of the at least one battery module and increases by one count for each charge/discharge cycle, and wherein the battery management unit determines a speed of decrease of performance of the at least one battery module in accordance with the count value and determine an increment of a width between the charge limit value and the discharge limit value in accordance with the speed of decrease of performance of the at least one battery module. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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Specification