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Batteries

MR2 EV is running!

Posted on:
Sunday, June 19th, 2011
Author:
Ken

Sorry for the long leave of absence folks!!! Things got hectic with a boy at home and I focused on getting the car done and didn’t have time to update the blog. Here is a summary of what I’ve done/decided: 1. Chose Lithium Iron Phosphate batteries instead of Lead acids (and am very glad I [...]

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Front compartment 5-battery rack

Posted on:
Sunday, October 18th, 2009
Author:
Ken

Moving on to the battery racks… My plan to fit 20 6V batteries did not pan out, I could not come up with a design that I liked to fit 20 batteries on the car. Instead, I opted to do a 18 8-V pack: from front of the car to back, 2 in the front [...]

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AC vs DC revisited

Posted on:
Monday, December 1st, 2008
Author:
Ken

So I’ve been rethinking the whole AC vs. DC system question and I am moving towards a DC conversion now. Here’s my reasoning: though AC is more efficient and has regenerative braking, it costs about 3-5k more. The extra efficiency comes out to about 5-10%, which, assuming an average DC conversion with a range of [...]

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EV range test run

Posted on:
Sunday, November 23rd, 2008
Author:
Ken

My fellow EV friend Steve and I did a trial run with his Honda Civic EV from my house to my work to see if his DC design would work for my commute. My commute is 22miles one way, mostly freeway at 65mph, and has a monster 9% grade hill for 1/2 mile at the [...]

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