Changes between Initial Version and Version 1 of WFDBatteryPowerTest

Timestamp:

Nov 8, 2013, 10:17:53 AM (12 years ago)

Author:

Eric Hazen

Comment:

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WFDBatteryPowerTest

@@ +1 @@
+This page describes a test battery power system for a CAEN VME WFD (i.e. V1724).
+See [https://nedm.bu.edu/twiki/bin/view/Main/BatteryRegulatorCircuits TWiki page]
+
+== Documents ==
+
+* Current Power Supply Schematic –  [http://ohm.bu.edu/~eob/WFD_Battery_Test.sch ExpressSCH]
+* Power Supply Bill Of Materials [https://spreadsheets.google.com/ccc?key=tbRC2EzND5jvA2t97cLVXLw&hl=en (Google Spreadsheet)] [http://spreadsheets.google.com/pub?key=tbRC2EzND5jvA2t97cLVXLw&single=true&gid=0&output=csv (csv)]
+* [http://docs.google.com/Doc?docid=0AVkcEtLoMLBZZGQ1aG5mN2pfMjNjejV6Mjlkcw&hl=en Design Description Google Document]
+* Proposed power supply schematic – [http://ohm.bu.edu/~hazen/nEDM/WFD_Battery_Test.pdf PDF] • [http://ohm.bu.edu/~hazen/nEDM/WFD_Battery_Test.sch ExpressPCB]
+
+
+== Basic Specs ==
+
+* Provide +5V at 4.5A, -12V at 0.2A and +12V at 0.2A from batteries for 2-3 hours.
+* Provide a shielded enclosure to hold one VME module, with an appropriate (separate?) enclosure for
+the batteries
+* AC-powered charger for the batteries
+
+Suggest starting with a 6V battery (i.e Power-sonic [http://www.power-sonic.com/site/doc/prod/78.pdf PS-6580] battery, and using an LDO regulator built with i.e. LT1575 controller and i.e. IRL3303 HEXFET.  See [http://ohm.bu.edu/~hazen/DataSheets/LinearTech/AppNote69.pdf Linear Tech App note 69]
+
+The +/-12V could come directly from power-sonic PS-1223 (2.3AH 12V) batteries.
+
+Charging notes on PS-6580:
+
+''''Cycle Applications''': Limit initial current to 17.4A. Charge until battery voltage
+(under charge) reaches 7.20 to 7.35 volts at 68°F (20°C). Hold at 7.20 to 7.35
+volts until current drops to under 580mA. Battery is fully charged under these
+conditions, and charger should be disconnected or switched to “float” voltage.
+
+“Float” or “Stand-By” Service: Hold battery across constant voltage source of
+6.75 to 6.90 volts continuously. When held at this voltage, the battery will seek its
+own current level and maintain itself in a fully charged condition.
+
+
+== Related Battery Web Links ==
+* [http://www.smartgauge.co.uk/ Smart Gauge]
+* [http://www.vonwentzel.net/Battery/ Comparing Marine Battery Technologies]
+* [http://www.jeromeindustries.com/SealedLA.htm Jerome Industries]
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