Difference between revisions of "Battery"

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*SC sends commands periodically specifying the (minimum) boost converter output voltage.
 
*SC sends commands periodically specifying the (minimum) boost converter output voltage.
 
**boost converter is not normally active or switching
 
**boost converter is not normally active or switching
 +
*SC command for emergency shut off, not re-enabled until re-insertion.
  
 
*battery terminals are not normally live.  thus impossible to externally short.
 
*battery terminals are not normally live.  thus impossible to externally short.
*external power enabled when battery inserted into ankle
+
*external power enabled when battery inserted into robot.
**micro power hall sensor senses magnet and enables BAF
+
**micro power hall sensor senses a magnet and enables BAF
**high impedance source that is 'shorted' when connected to ankle and enables BAF
+
**high impedance source that is 'shorted' when connected to robot and enables BAF
**BAF 'soft starts' ankle - avoiding inrush current
+
**BAF 'soft starts' robot - avoiding inrush current
*low voltage (fuel gauge) shutoff - each cell voltage monitored
+
*low voltage (and fuel gauge) shutoff - voltage of each cell is indepentically monitored.
* impedance tracking of each cell?
 
*fuel gauge : micropower current sensor that integrates (dis)charge
 
  
 +
*impedance tracking of each cell?
 +
*fuel gauge : micropower current sensor that integrates charge/discharge of battery. 
  
 
*electronic fuse : SC sends commands periodically that specify the maximum amount of current and/or power allowed.   
 
*electronic fuse : SC sends commands periodically that specify the maximum amount of current and/or power allowed.   
Line 16: Line 17:
 
*internal charger and ballancer
 
*internal charger and ballancer
 
**inductive charging.
 
**inductive charging.
 +
*believe a MSP430 micro should be employed.  lowest possible power
 +
**has ADCs, however, *might* not be accurate enough to monitor cell voltages (15V/4096 = 4mV) - may require external 16 bit ADC, or opamp conditioning

Revision as of 16:51, 29 July 2009

  • SC sends commands periodically specifying the (minimum) boost converter output voltage.
    • boost converter is not normally active or switching
  • SC command for emergency shut off, not re-enabled until re-insertion.
  • battery terminals are not normally live. thus impossible to externally short.
  • external power enabled when battery inserted into robot.
    • micro power hall sensor senses a magnet and enables BAF
    • high impedance source that is 'shorted' when connected to robot and enables BAF
    • BAF 'soft starts' robot - avoiding inrush current
  • low voltage (and fuel gauge) shutoff - voltage of each cell is indepentically monitored.
  • impedance tracking of each cell?
  • fuel gauge : micropower current sensor that integrates charge/discharge of battery.
  • electronic fuse : SC sends commands periodically that specify the maximum amount of current and/or power allowed.
  • internal charger and ballancer
    • inductive charging.
  • believe a MSP430 micro should be employed. lowest possible power
    • has ADCs, however, *might* not be accurate enough to monitor cell voltages (15V/4096 = 4mV) - may require external 16 bit ADC, or opamp conditioning