John makes a good point about the common ground. In that case it could still be jury rigged to work, but much more care is needed to avoid sparks :) And the suggestion of having the connections setup for multiple use makes sense.
I do that to a small degree by have a spare cable available with which I can bypass a cell, in the case of a single cell failure. Keep in mind I'm using lithium batteries which are 3.2 volts each, so taking one out of the string still leaves a good working voltage around 48 volts.
Cheers
Chris
On 21/02/2011, at 3:44 PM, John Green wrote:
> Definitely the way to go if the bilge pump runs regularly, or if the other 12v stuff needs a supply.
> Not only do you have the redundancy of the battery being capable of direct hookup, but there are 3 more batteries you could use in an emergency, provided you do not have a fixed common ground. The trick might be to have the connectors, whatever you use, set up for multiple options.
>
> John
>
>
> From: chris Baker <chris@currentsunshine.com>
> Subject: Re: [Electric Boats] 48V to 12V
> To: electricboats@yahoogroups.com
> Received: Saturday, February 19, 2011, 1:33 PM
>
>
> Now that the crux of this discussion has turned to reliability
> its worth thinking about this in relation to the battery equaliser
> solution I mentioned earlier in this thread.
> http://www.solarconverters.com/
>
> In this case the load is coming from one of four propulsion batteries
> in a 48v pack. If the equaliser fails, you still have supply to your
> critical 12v equipment such as bilge pump and radio.
>
>
>
> --
> _______________________________________________
> Surf the Web in a faster, safer and easier way:
> Download Opera 9 at http://www.opera.com
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>
No comments:
Post a Comment