Cell/battery calculation part 7
Question= 220 v. DC supply पर 60 cell charge करने हैं। Cell 1.8 volt तक discharge किए हुए हैं और charge करने के बाद इनकी voltage 2.4 v प्रति cell दी गई हैं। / cell का internal resistance (r) 0.01Ω हैं और charging resistance (R) 20 Ω का लगाया गया है। (1) starting charging current? (2) final charging current? मालूम करें।
Solution = (1) starting charging current = no. of Cell = 60 , discharge Voltage= 1.8 v, total Voltage= 60× 1.8 =108 volt , r of one cell =0.01 Ω ,
So, total r = 60×0.01= 0.6 Ω, R= 20Ω,
•Total resistance= 20+0.6 = 20.6 Ω ,.
• Voltage drop= 220-108=112 v ,
• formula= I= V÷R = 112÷ 20.6 = 5.45 ampere , answer ✓
(voltage high= current high)
(2) Final charging current = no. of cell = 60, charging voltage= 2.4 v , total Voltage = 60×2.4=144 volt, total resistance= 20.6 Ω
So, voltage drop= 220-144 = 76 volt,
I= 76÷ 20.6= 3.69 ampere, answer ✓
(voltage low= current low)
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