MautoK
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| posted on 18/10/09 at 12:00 PM |
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OT - charging a slave battery
L&G,
Neighbour has a 2 ton tipping trailer. Tipping mechanism is 12V battery -> hydraulic pump -> hydraulic ram (all on the trailer). From a fully
charged battery he gets about 6, 7 or 8 tips; he needs to get more...
Possible options:
1. Fit a second battery
2. Fit 12S (whatever the second plug/skt setup is called); install 12V/240V inverter and charger to generate 14V and top up slave battery while
travelling.
3. Some system to trickle charge slave directly from truck alternator, bearing in mind the relatively low current capacity of existing wiring and the
possibility/likelihood of the slave being fairly flat. Was thinking along the lines of diode + current-limiting resistor.
Seems to me:
1. Kluge
2. Sledgehammer
3. Potentially most elegant/locost solution.
Any ideas out in LCB land?
Cheers,
John.
He's whittling on a piece of wood. I got a feeling that when he stops whittling, something's gonna happen. (OUATITW/Cheyenne)
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lsdweb
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| posted on 18/10/09 at 12:06 PM |
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Split charge relay as used in most caravan installations.
Try here
half way down the page.
And now dead easy to use as they don't need to sense that the engine is running like the old ones (I think they sense the battery voltage of
your main battery and only charge the second one when the main one is fully charged.)
Wyn
[Edited on 18/10/09 by lsdweb]
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blakep82
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| posted on 18/10/09 at 12:06 PM |
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what are those plugs called that you use on single seater cars to plug a battery in for starting? anderson plugs?
use one to plug into the van. power it from the van's battery, but make sure the engines running
________________________
IVA manual link http://www.businesslink.gov.uk/bdotg/action/detail?type=RESOURCES&itemId=1081997083
don't write OT on a new thread title, you're creating the topic, everything you write is very much ON topic!
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britishtrident
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| posted on 18/10/09 at 12:24 PM |
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A few ways to do it but a modern "inteligent" split charge relay the best --- works on the tow car battery reaching a reasonable
charging voltage before the slave battery gets charged. This is an improvement over traditional split charge relays.
http://www.brocott.co.uk/towbar-electrics/towbar-wiring-relays/intelligent-self-switching-split-charge-relay-kit-12v-30amp-p-848.html
Can probably be found on Ebay a good bit cheaper .
For a socket connection to the trailer a standard carvan auxilary plug socket called the 12S (aka Grey Socket) is the puka way to do it.
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britishtrident
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| posted on 18/10/09 at 12:26 PM |
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This kit has everything required except the plug for the trailer
http://www.brocott.co.uk/towbar-electrics/12s-grey-socket-caravan-electrics-kit-with-self-switching-spli-p-932.html
[Edited on 18/10/09 by britishtrident]
[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]
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MautoK
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| posted on 18/10/09 at 12:38 PM |
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Thank you, Gents; plenty to look though there! 
John.
He's whittling on a piece of wood. I got a feeling that when he stops whittling, something's gonna happen. (OUATITW/Cheyenne)
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