Thursday, September 9, 2010

Re: [Electric Boats] Battery pack voltages

 

On 08/09/10 16:40, Peter wrote:

 

The OZecoDrive setup uses a 24 volt battery pack, whereas most of the other off-the-shelf setups use higher voltages. I understand it's all about Watts, but what are the upsides/downsides of the 24 volt system?
It seems it would give one the option of having a lot smaller battery bank if you only needed it for docking etc.

From what I understand of it, having higher voltage means you can use thinner gauge cable and reduce transmission loss. However with batteries comes the issue of whether higher voltage will be detrimental to the individual batteries in series, plus the higher the total voltage of the system the more potential for shorting. Secondly it all comes down to matching the voltage required by the motor.


In the case of the OZ motor it can run up to 96v; but to do so reduces the life of the motor considerably, and this is why I like to know all about the whole system. It is cheaper for a manufacturer to run a smaller motor to death, but use a cheaper (less efficient or smaller and therefore overpowered) motor than run a better motor at a lower voltage to get the most out of it.

Jeny

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