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

[Effort]

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

 

[negitron]

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.

 

[oswaler]

I would first clarify that the units mentioned in the content are not conventional units used in the field of electrical currents. The use of "h rate" and "microAh" is not standard and may require further clarification from the source of the information.

However, assuming that the information provided is correct, it seems that the current density can be derived from the given information. The discharge rate of 0.51 h rate can be converted to a discharge rate of 1.1 (microAh) / ((cm^2)*(micrometer)) for 25 seconds, which means that in 1 hour (3600 seconds), the discharge rate would be 1.1 (microAh) / ((cm^2)*(micrometer)) * (3600 seconds/25 seconds) = 15840 (microAh) / ((cm^2)*(micrometer)).

To convert this to current density, we need to divide by the area and time, which would be (10^-2)^2*(10^-6) cm^2 and 3600 seconds, respectively. This gives us a current density of 15840 (microAh) / ((cm^2)*(micrometer)) / [(10^-2)^2*(10^-6) cm^2 * 3600 seconds] = 1.584 A/m^2.

This calculation seems reasonable, but as mentioned earlier, the units used are not conventional and may require further clarification. It is always important to double check the units and calculations to ensure accuracy in any scientific simulation.