| 摘要 |
PURPOSE: A cooling control method of a high voltage battery system is provided to efficiently cool each battery in an electric vehicle, and to effectively cool the battery by cooling the batteries in a high temperature battery system. CONSTITUTION: A cooling control method of a high voltage battery system comprises: a step of calculating caloric value(S15) of each battery; a step of determining air volume of each cooling fan by using the caloric value(S16); a step of determining the operating rate of the each cooling fan based on the air volume(S18); and a step of operating the each battery fan installed in each battery system according to the operating rate(S20). [Reference numerals] (AA) Start; (BB) End; (S11) Ignition switch ON ?; (S12) Measuring the temperature of each battery equipped in battery systems; (S13) Is the maximum temperature of the battery in an adequate temperature range ?; (S14) Calculating currents(I) and resistance(R) values after a unit time(Δt) by sensing battery using currents(I) and checking battery resistance(R); (S15) Calculating the calculating caloric values, W1 to Wn, using the calculated currents(I) and resistance(R); (S16) Determining the air volume of a cooling fan by referring an air volume graph using the calculated W1 to Wn; (S17) Is temperature deviation between the battery systems in an adequate range ?; (S18) Determining the operating rate of the cooling fan, D1 to Dn, using the P-Q diagram of the cooling fan; (S19) Being increased by adding the operating rate of cooling fans in a battery system of high temperature; (S20) Driving the cooling fan 1 to n |
