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Old 05-04-2009, 00:18   #16
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RR370FRD 12/24V battery management system
Drawing 14 shows:
The wiring diagram for battery charging by solar cells or by an external battery charger (never used) and
The wiring diagram of the Bottom LCD display.

Drawing 15 shows:
The wiring diagram of the Top LCD display A Bank and
The wiring diagram of the Middle LCD display B Bank.

Note:
The most time consuming is the making of an accurate scaling resistor including a variable resistor for fine tunning the panel meter.
The drawings show a 9 Volt battery DC supply; the batteries will last more than a year if not left switched on. Otherwise a few days.
I have a different power supply but because it involves higher voltages it is not shown.
The panel meters do not have internal lighting and external LEDs are provided to read the panel in the dark.
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Old 05-04-2009, 03:02   #17
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RR370FRD 12/24V battery management system
Picture 1 shows the Charging and Monitor panel.
Picture 2 shows the back of the LCD panel. A steady hand and a good soldering iron are required for soldering the leads.
Picture 3 Q2220 application circuits.

Note:
Q2220 from Dick Smith
QP-5570 from Jaycar
Shunts QP-5412 & QP-5414 from Jaycar
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Old 06-04-2009, 00:21   #18
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RR370FRD 12/24V battery management system
Picture 3 shows the Capstan control and monitoring and Generator control panel.
Note:
The LCD indicates among other readings the current drawn by the Capstan.
The Capstan motor (1250W 24V) is externally cooled by a fan.

Picture 4 shows the wiring associated with the panel.

Sorry no .doc file, the file is to big for this forum.
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Old 06-04-2009, 06:06   #19
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RR370FRD 12/24V battery management system
Picture 5 shows the LCD which monitors the Load voltage and the associated Dot Graph.

Picture 6 shows the back of the LCD panel.
Note:
Plugs, terminals, wiring, blocking diodes, some switches and potentiometers have been recycled from an old Furuno Radar and a Japanese Main frame.
Protective lacquer as been sprayed on all the circuitry. Tip: when spraying a PC board, hold the board upside down and spray from underneath. This will prevent the lacquer from running into the switches.

Picture 7 shows the wiring diagram of the LCD voltage monitor and the alarm associated with the dot graph.

Picture 8 shows detail of the flashing LEDs used.
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Old 06-04-2009, 21:17   #20
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RR370FRD 12/24V battery management system
The Batteries.
I use batteries which have been recently described as:
“Oh Gawd...just checked and you bought the wrong damn battery type for deep cycle marine use in a sailboat. You have a SEALED WET CELL for your house bank. It is not only incompatiable with the Gel like I said before...it is also a very poor choice. Can you still take it back and get either an AGM (absorbed glass mat) or another Gel? Otherwise...don't expect too much as these batteries are primarily designed for use in small power boats for both starting and house needs in one battery.”
The batteries are sold with some charging instructions and data that I have to assume are correct. For fun, the same battery that I use today was tested on 30th September 2003. Picture A.
I run the generator for 2 hours a day. The electricity that it produces during these two hours is my budget; it saves me carting 200 litres of fuel on deck.
I do not need an Amps recorder after all many forum members will state:
“A rested battery should give you the following,
100% charge 12.6v (12.8),
75% = 12.4v (12.6),
50% = 12.2v (12.4),
25% = 12.0v (12.2),
00% = 11.8v (12.0).”
Nor do I need smart charging to cook my batteries. Gosh I must sound boring to some. I like my batteries and it seems they like me too. I also like my LED dot graphs. At a glance and at any time they give me a picture that I would not get peering at multiple voltmeters. The LED dot graphs indicate to me how the five batteries behave when I start an engine and also let me know if I have the blower on the wrong Bank when I run the Main engine and so many others things.
The dry season is coming up, time to go sailing. Bye. Chala.
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