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Battery Equalizer Schematics Rev 1.0

Porsche 914 EV Conversion

I'm currently working on a battery equalizer for the 914 EV based on the whitepaper at the following link: [link] The above two schematics show the circuit that I'm experimenting with using 12V batteries. It seems to work fine on my bench. By clicking on the images, you can get a much larger version of the pictures.

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Measuring State-of-Charge on Lead Acid Batteries

Porsche 914 EV Conversion

Since I'm still waiting on parts from ElectroAuto, I decided to take the plunge and do some extensive research on Lead-Acid battery technology. The 914 AC kit uses 8V golf cart batteries and I'm wondering if different batteries like Hawkers or Optima Yellow-Top batteries would be better.

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Don’t stop the EV music

Electric Auto Association

The only EV he was familiar with was a golf cart, so he tried playing around with that, and eventually converted a Beck into electric.” Later, he began selling used parts and kits for EV conversions, and eventually that included salvaged used Tesla batteries as back-ups for off--grid solar living systems.

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More Delays

Porsche 914 EV Conversion

Over the past few weeks I've been trying to contact the folks at Electro Automotive to get the status of the EV 914 kit. They finally responded last night and apparently they're completely buried under the demand for EV conversion kits. He got one of the earlier DC motor kits for the 914 from Electro Automotive.

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Ordering a Motor Adapter

Open Source Civic EV Kit

After some significant debate at the Civic-EV Google Group on whether to use a clutched or clutch-less system, I'm going to pursue using a clutched system for the initial revision of this kit. Here is a picture of my transmission label: Next up: thinking about batteries and the controller system.

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Hauling Lead and Confusing Connections

Porsche 914 EV Conversion

These high-capacity 8-volt golf-cart batteries are 70 pounds apiece. Here are the batteries in the front box. I pre-laid out these batteries on the floor to guestimate what the connections between the terminals were. Here is the battery strap designed for these kind of batteries. And the rear box.

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The Suspension is Here!

Porsche 914 EV Conversion

If you hadn't read before, the 18 8-volt golf cart batteries add 800 pounds to the weight of the car, so the suspension needs upgrading. The real gamble is how fast the rest of the kit shows up. On a slightly downer note, I ordered a $250 special desulfator for 6-24V batteries.

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