#1746 HIGH CTest: Verify NiMH shutdown capacity

Zarro Boogs per Child bugtracker at laptop.org
Wed Jul 4 22:52:01 EDT 2007


#1746: Verify NiMH shutdown capacity
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  Reporter:  jg                   |       Owner:  rsmith
      Type:  defect               |      Status:  new   
  Priority:  high                 |   Milestone:  CTest 
 Component:  embedded controller  |     Version:        
Resolution:                       |    Keywords:  power 
  Verified:  0                    |  
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Comment (by David.Lin):

 The system will shutdown when the below two conditions happen
 simultaneously.

 1.voltage lower than *wBAT_LowVolt* and SOC < 14
   The *wBat_LowVolt* is not a constant.
   It is depend on temperature and current as following formula.

 wBat_LowVolt = (temperature – 20 )/20 * (y1-y2))+y2
 y1 = (-0.21xx * lbat) + 6.1xxx
 y2 = (-0.24xx * lbat ) + 6.1xxx

 2. voltage lower than *V10*
 The *V10* is not a constant.
 It is depend on temperature and current as following formula.
 V10 = (temperature – 20 )/20 * (y1-y2))+y2
 y1 = (-0.22xx * lbat) + 6.2xxx
 y2 = (-0.25xx * lbat ) + 6.2xxx

-- 
Ticket URL: <http://dev.laptop.org/ticket/1746#comment:1>
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