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Battery capacity test load

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nuckolls.bob(at)aeroelect
Guest

Posted: Wed May 13, 2020 10:36 am Post subject: Battery capacity test load

At 01:02 PM 5/13/2020, you wrote:

  	  Quote: 	
		  --> AeroElectric-List message posted by: "blues750" <den_beaulieu(at)yahoo.com>



 Bob, that's pretty clever.  In my case  how "fancy" should I go? For connections to the load from the battery,  I was thinking of simply using two leads of #10 wire with alligator clips on both ends and having an inline fuseholder on one lead with a 15A fuse.  Or...do I fabricate a switched/fused platform, with ring terminals for connections, etc?  User preference?

 	


   What you describe would be fine. You're not

   switching a really big current . . . yeah, there

   will be some 'sparking' when you clip the final

   joint closed but they don't call us electron-herders

   'sparkies' for nothing.



   20 AWG wire would be fine . . . the leads are

   short and the anticipated 13A load is easily

   managed by that size wire. Same with alligator

   clips.



   KISS my friend . . . KISS



 

 

   Bob . . .

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blues750

Joined: 06 Jun 2015
Posts: 56

Posted: Wed May 13, 2020 4:42 pm Post subject: Re: Battery capacity test load

Thanks Bob, once I get setup and gather some data, I'll post results.



Dave

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blues750

Joined: 06 Jun 2015
Posts: 56

Posted: Sat May 30, 2020 5:13 pm Post subject: Re: Battery capacity test load

Finally received my 4 ohm 100W resistors to make up a resistive load for doing my battery capacity checks.  I get 12.8A through the load and plenty of heating of the heat sink (so I added a fan, and a couple of cooling fins) to the heat sink which is a 4"x6" slab of 3/4" aluminum. Will be interesting to find out what the EarthX battery will do for time before disconnecting.

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