How Do I Calculate Current Density from a 0.51 h Discharge Rate?

AI Thread Summary
To calculate current density from a 0.51 h discharge rate, the user needs to derive the current based on the provided discharge specifications. The discharge occurs in steps of 1.1 microAh per cm² per micrometer for 25 seconds, followed by an open circuit for 75 seconds. The user calculated the current density as 15,840 A/m², which seems high but is considered reasonable given the context of the wire rating. The calculation involves converting microAh to A/m² while accounting for the depth and time. Overall, the derived current density aligns with practical electrical standards.
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I am trying to set up intial conditions for an FEA simulation and I need to know the current density. I first need to get the current which is specified as a"constant current of 0.51 h rate." This is a disharge rate. I assumed that the h meant hour. Can I derive the currnet form that information?


Put another way, the paper said that the discharge occurs in steps of 1.1 (microAh) / ((cm^2)*(micrometer)) for 25 seconds and then maintianting an open circuit for 75 seconds. I am assuming this is just saying the 0.51 h rate another way. Can someone explain how I relate the two?

I used the 1.1 (microAh) / [(cm^2)*(micrometer)] to calculate the currnet density in A/m^2 by

[1.1 microAhr / ((10^-2)^2*(10^-6)) ] * [depth=10*10^-3] * [3600sec/hr * 1/25sec.]

= 15840 A/m^2...this seemed kind of high, but I'm not an EE.

Any insights would be appreciated
 
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Looks about right to me at a cursory glance. 15,840 A/m^2 would only put about 80 mA through, say, 10 AWG wire which is rated by the NEC for use on 30 A circuits. So, not all that high, really.
 
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