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13. In a Li-ion battery with serially connected Li-ion cells, a switched passive balancing system is used. The circuit for one cell is shown in the figure below. The activation of the balancing via switch S is based on a cell voltage measurement. The Li-ion cell has a nominal capacitance of KN and an open circuit voltage characteristic such as the OCV curve shown below. Characteristics of the balancing system: -Voltage measurement accuracy: (Delta)U -balancing resistor: Rbal -The switch S can be assumed to be ideal. a) How long does it take to reduce the state of charge by x% with the balancing circuit at a state of charge of y% ? b) What energy is taken from a battery cell? c) What is the maximum SOC difference (Delta)SOC that two Li-ion cells can have after symmetrization has been completed due to the inaccurate voltage measurement? Note: To put it simply, assume that during balancing: U=OCV= const. Project planning data Constant current discharge Project planning data constant power discharge High Power Lithium Ion ANR266507h A/235ystems hithium-ion rechargeable ANR266507w] cell is copoble of very high power, lang