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.
Effort
Messages
8
Reaction score
0
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
 
Engineering news on Phys.org
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.
 
Hi all I have some confusion about piezoelectrical sensors combination. If i have three acoustic piezoelectrical sensors (with same receive sensitivity in dB ref V/1uPa) placed at specific distance, these sensors receive acoustic signal from a sound source placed at far field distance (Plane Wave) and from broadside. I receive output of these sensors through individual preamplifiers, add them through hardware like summer circuit adder or in software after digitization and in this way got an...
I have recently moved into a new (rather ancient) house and had a few trips of my Residual Current breaker. I dug out my old Socket tester which tell me the three pins are correct. But then the Red warning light tells me my socket(s) fail the loop test. I never had this before but my last house had an overhead supply with no Earth from the company. The tester said "get this checked" and the man said the (high but not ridiculous) earth resistance was acceptable. I stuck a new copper earth...
Thread 'Beauty of old electrical and measuring things, etc.'
Even as a kid, I saw beauty in old devices. That made me want to understand how they worked. I had lots of old things that I keep and now reviving. Old things need to work to see the beauty. Here's what I've done so far. Two views of the gadgets shelves and my small work space: Here's a close up look at the meters, gauges and other measuring things: This is what I think of as surface-mount electrical components and wiring. The components are very old and shows how...
Back
Top