//
// this fucntion is called often or very often to process battery data
// can be used equally well for live battery data in real time or to process recorded battery data
//
public bool bValuateBatteryData(strctBattMonData stRecentBattData, int ciIterationNo)
{
bool bRes = false;
stDischrgChrgCycle stdschrgNewCycle = default(stDischrgChrgCycle); // neends init such as in DateTime dteSrc = default(DateTime),
TimeSpan tmspnStarterMotorRun;
// Debug.WriteLine("++bValuateBatteryData("+ciIterationNo+")");
// compute average current and keep it to eliminate noise in current sensor line
if (m_iCurrentAvrgIdx < m_ciCurrAvrgCount)
{
m_dblTempCurrent += stRecentBattData.dblBatAmperes;
m_iCurrentAvrgIdx += 1;
}
else
{
m_dblAvrgCurrent100Smpls = m_dblTempCurrent / (double)m_ciCurrAvrgCount;
m_iCurrentAvrgIdx = 0;
m_dblTempCurrent = 0.0;
};
// on the very first iteration save this as beginning of recording
if (0 == ciIterationNo)
{
stbtdtmTempFirstRecord = stRecentBattData;
if (null == m_arriTimesBetwItersHistogr)
{
m_arriTimesBetwItersHistogr = new int [ciMaxHistoSize];
}
;
// erase histogram as well
Array.Clear(m_arriTimesBetwItersHistogr, 0, ciMaxHistoSize);
}
else
{
// next we check for Microcontroller errors.
TimeSpan tmspnBetwnIters = stRecentBattData.dtBattDateTime - stcBattPrevData.dtBattDateTime;
// Timer tick may be reported by microcontroller as inaccurate time, including jumping backawards
if (tmspnBetwnIters.TotalSeconds < 0.0)
// ignore very first inetration, since previous date-time is invalid
// if(tmspnBetwnIters.Days < 0)
{
Debug.WriteLine("bValuateBatteryData(ERROR) time jumped backwards! Previous=" + stcBattPrevData.dtBattDateTime.ToString("HH:mm:ss.fff") + " > New=" + stRecentBattData.dtBattDateTime.ToString("HH:mm:ss.fff"));
// fix up error - use last known good date-time
stRecentBattData.dtBattDateTime = stcBattPrevData.dtBattDateTime;
}
else
{
// for good iteration, save data to histogram
// Debug.WriteLine("bValuateBatteryData() Curr-Prev duration " + tmspnBetwnIters.Days.ToString() + "."+ tmspnBetwnIters.Hours.ToString("0#") +":"+ tmspnBetwnIters.Minutes.ToString("0#")+":"+tmspnBetwnIters.Seconds.ToString("0#.")+"."+tmspnBetwnIters.Milliseconds.ToString("000"));
int iIntervBetwIters = (int)tmspnBetwnIters.TotalMilliseconds;
if (iIntervBetwIters < ciMaxHistoSize)
{
m_arriTimesBetwItersHistogr[iIntervBetwIters] += 1;
}
;
// for every 1000 iterations, print a histoghram
if (0 == ciIterationNo % 999)
{
for (int j = 0; j < ciMaxHistoSize; j++)
{
Debug.WriteLine("[" + j.ToString() + "] : " + m_arriTimesBetwItersHistogr[j].ToString());
}
;
}
;
}; // end IF tmspnBetwnIters.TotalSeconds >0
}; // end IF check for Microcontroller errors.
// here we observe a few parameters including min and max of voltage and current
// as well as watch for engine starting pattern : starter mtr OFF, ON, OFF sequence
// criteria - low discharge current for several seconds - key on ignition on
// then high discharge current for a second or two - starter on
// then dischanrge current changes to charge current
// then battery gets strong charging which should quckly deacrease within 15 seconds if battery is healthy
//======================================================================
// -80A -40A -2A -0.1A 0A +0.1A +2A +100A
// str mtr | discharging | no load | charging
// { --->-------->-------->----} current crosses zero amperes line
//======================================================================
//-------------------------------------------------------------------------------------------
// BATTERY STRONG DISCHARGE. batt current <-80A
//--------------------------------------------------------------------------------------------
if (stRecentBattData.dblBatAmperes < -80.0) // starter surely draws more than that
{
//check if microcontroller correctly specified battery state
if (stRecentBattData.chBattState != 'D')
{
Debug.WriteLine("bValuateBatteryData() ERR battery state mismatch - D");
}
;
// watch for maximum current starter draws - in-rush starter motor current
if (stRecentBattData.dblBatAmperes < m_sdblMaxBattDischrgCurrent)
{
m_sdblMaxBattDischrgCurrent = stRecentBattData.dblBatAmperes;
}
else
{
// Debug.WriteLine("bValuateBatteryData() Max discharging current=" + sdblMaxBattDischrgCurrent.ToString("+#.#;-#.#;0"));
};
if (true == m_bStarterMotorIsOn)
{
// starter motor keeps running...
Debug.WriteLine("bValuateBatteryData() starter mtr is RUNNING");
}
else
{
// starter motor just started
Debug.WriteLine("bValuateBatteryData() starter mtr is now ON !");
m_bStarterMotorIsOn = true;
stcBattDatStarterOn = stRecentBattData;
stcBattDatStarterOff = stcBattPrevData;
// create new discharge-charge cycle
stdschrgNewCycle.bIsCycleComplete = false;
stdschrgNewCycle.bIsFullyRecharged = false;
stdschrgNewCycle.dblMaxChrgCurrent = -99.0;
stdschrgNewCycle.dblMaxDischrgCurrent = m_sdblMaxBattDischrgCurrent;
stdschrgNewCycle.stbtdtmStarterOn = stRecentBattData;
stdschrgNewCycle.stbtdtmFirstRecord = stbtdtmTempFirstRecord;
if (null != m_mapDischrgChrgCyles)
{
// you can use .Add function to ass new starter motor event data
try
{
m_mapDischrgChrgCyles.Add(stdschrgNewCycle.stbtdtmStarterOn.dtBattDateTime, stdschrgNewCycle);
}
catch (ArgumentException aexc)
{
Debug.WriteLine("bValuateBatteryData() battery already has this dis-chrg cycle on record, skip." + aexc.ToString());
};
// also can use array notation
// m_mapDischrgChrgCyles[stdschrgNewCycle.stbtdtmStarterOn.dtBattDateTime]=stdschrgNewCycle;
}
; // end IF m_mapDischrgChrgCyles is not Null
}; // end IF true==m_bStarterMotorIsOn
}
// strong discharge case
//-------------------------------------------------------------------------------------------
// BATTERY DISCHARGE -80A < batt current < -2A
//--------------------------------------------------------------------------------------------
else if (stRecentBattData.dblBatAmperes >= -80.0 && stRecentBattData.dblBatAmperes < -2.0)
{
// Debug.WriteLine("bValuateBatteryData() battery discharging");
//check if microcontroller correctly specified battery state
if (stRecentBattData.chBattState != 'D')
{
Debug.WriteLine("bValuateBatteryData() ERR battery state mismatch - D");
}
;
// when discharge current is not that big, i.e. not a starter mtr case
// battery discharging case
//-------------------------------------------------------------------------------------------
// BATTERY DISCHARGE -40A < batt current <-0.2A
//--------------------------------------------------------------------------------------------
if (true == m_bStarterMotorIsOn && stRecentBattData.dblBatAmperes > -40.0 && stRecentBattData.dblBatAmperes < -0.2)
{
Debug.WriteLine("bValuateBatteryData() starter mtr now OFF.");
// starter motor not running now
m_bStarterMotorIsOn = false;
stcBattDatStarterOffAfterOn = stRecentBattData;
stcBattDatCurrentCrossZero = stRecentBattData;
tmspnStarterMotorRun = stcBattDatStarterOffAfterOn.dtBattDateTime - stcBattDatStarterOn.dtBattDateTime;
// uncommenting line below causes exception in line reader
Debug.WriteLine("bValuateBatteryData() starter mtr duration=" + tmspnStarterMotorRun.Seconds.ToString() + "." + tmspnStarterMotorRun.Milliseconds.ToString("000") + " sec");
// compute charge released for engine starting
double dblTempmQ = (stcBattDatStarterOffAfterOn.liQOut - stcBattDatStarterOn.liQOut);
Debug.WriteLine("bValuateBatteryData() Battery released " + (dblTempmQ / 1000).ToString() + " Q to start engine");
if ((stcBattDatStarterOff.dblBatAmperes - stcBattDatStarterOn.dblBatAmperes) != 0.0)
{
// compute battery internal resistance and related parameters
m_dblBatteryResistance = (stcBattDatStarterOff.dblBatVolts - stcBattDatStarterOn.dblBatVolts) /
(stcBattDatStarterOff.dblBatAmperes - stcBattDatStarterOn.dblBatAmperes);
Debug.WriteLine("bValuateBatteryData() batt R=" + m_dblBatteryResistance.ToString("0.#000") + " Ohm");
// estimate cranking amperes based on voltage-current
// Hot cranking amperes (HCA) is the amount of current a battery can provide at 80°F (26.7°C).
// The rating is defined as the current a lead-acid battery at that temperature can deliver for 30 seconds and maintain at least 1.2 V/cell (7.2 volts for a 12-volt battery).
// Cranking amperes (CA), also sometimes referred to as marine cranking amperes (MCA), is the amount of current a battery can provide at 32°F (0°C).
// The rating is defined as the number of amperes a lead-acid battery at that temperature can deliver for 30 seconds and maintain at least 1.2 V/cell (7.2 volts for a 12 volt battery).
// Cold cranking amperes (CCA) is the amount of current a battery can provide at 0°F (−18°C).
// The rating is defined as the current a lead-acid battery at that temperature can deliver for 30 seconds and maintain at least 1.2 volts per cell (7.2 volts for a 12-volt battery)
if (m_dblBatteryResistance != 0.0)
{
// example
// key on 12.1V,-6.4A; starter on 10.7V, -104A; R=(12.1-10.7)/(104-6)=1.4V/97.6A=0.014 Ohm
// knowing R predict CA by computation CA=(12.1-7.2)/R
m_dblCA = (stcBattDatStarterOff.dblBatVolts - 7.2) / m_dblBatteryResistance;
Debug.WriteLine("bValuateBatteryData() batt CA=" + m_dblCA.ToString("0000") + " Amperes");
}
;
//
// determine whether it was actual engine starting cyle or maybe just a momentary drop in battry current
//
// decision made is based on high discharge currnet value and duration of it
// Must draw high discharge current for at least 0.5 sec to qualify as engine starting event
// AND battery should be discharging : state=D and voltage should be < 12.6 Volts
if (tmspnStarterMotorRun.Seconds >= 1 ||
(tmspnStarterMotorRun.Seconds == 0 && tmspnStarterMotorRun.Milliseconds > 500))
{
m_iEngineStartEvtCnt += 1;
// modify last incomplete discharge-charge cycle and update its data
Debug.WriteLine("bValuateBatteryData() valid cycle duration " + tmspnStarterMotorRun.Seconds.ToString() + "." + tmspnStarterMotorRun.Milliseconds.ToString("000") + " sec detected. Completing dischrg-chrg cycle....");
// find our dis-chrg cycle in array and modify it to store starter off data
stDischrgChrgCycle stdschrgCycleInWorks = m_mapDischrgChrgCyles[stcBattDatStarterOn.dtBattDateTime];
// if found, modify data in place
//
// we have now stdschrgCycleInWorks.stbtdtmStarterOn part filled only.
// now populate stdschrgCycleInWorks.stbtdtmStarterOffAfterOn and other members
//
stdschrgCycleInWorks.bIsCycleComplete = true;
stdschrgCycleInWorks.dblMaxChrgCurrent = -99.0;
stdschrgCycleInWorks.dblBatteryResistance = m_dblBatteryResistance;
stdschrgCycleInWorks.dblCA = m_dblCA;
stdschrgCycleInWorks.dblMaxDischrgCurrent = m_sdblMaxBattDischrgCurrent;
stdschrgCycleInWorks.stbtdtmStarterOffAfterOn = stRecentBattData;
stdschrgCycleInWorks.tmspnStrMotorRunDur = tmspnStarterMotorRun;
stdschrgCycleInWorks.dblCoulmbsToStartEngine = dblTempmQ / 1000.0;
// save it into array
m_mapDischrgChrgCyles[stcBattDatStarterOn.dtBattDateTime] = stdschrgCycleInWorks;
}
else
{
// not a engine starting cycle! Just very short current drop, e.g. downspike
Debug.WriteLine("bValuateBatteryData() Cycle duration too short: " + tmspnStarterMotorRun.Seconds.ToString() + "." + tmspnStarterMotorRun.Milliseconds.ToString("000") + " sec.");
Debug.WriteLine("bValuateBatteryData() Not a starter mtr cycle. Removing incomplete dischrg-chrg cycle....");
// so we delete previous spurious dischr-chrg cycle from our list
m_mapDischrgChrgCyles.Remove(stcBattDatStarterOn.dtBattDateTime);
};
}
; // end IF of (stcBattDatStarterOff.dblBatAmperes-stcBattDatStarterOn.dblBatAmperes) !=0 Amp
// store time of this moment and watch for 15 minutes from it - battery should quckly charge, charge current decrease
}
; // end IF of true==m_bStarterMotorIsOn
}
//
// when battery current current crosses zero Ampreres line
// this includes NO LOAD case as well - see inner check
else if (stRecentBattData.dblBatAmperes >= -2.0 && stRecentBattData.dblBatAmperes <= +2.0)
{
//-------------------------------------------------------------------------------------------
// BATTERY NO LOAD -0.1A < batt current <+0.1A
//--------------------------------------------------------------------------------------------
if (stRecentBattData.dblBatAmperes >= -0.1 && stRecentBattData.dblBatAmperes <= +0.1)
{
// Debug.WriteLine("bValuateBatteryData() batt no load");
// may update SoC bars for NL case here
//check if microcontroller correctly specified battery state
if (stRecentBattData.chBattState != 'I')
{
Debug.WriteLine("bValuateBatteryData() ERR battery state mismatch - NL");
}
;
}
;
//
// check to determine if we are coming here just after engine starting cycle
// - to find out, we determine if an element is present with date-time of starter motor was switched on
bool bHasStarterOnElem = m_mapDischrgChrgCyles.ContainsKey(stcBattDatStarterOn.dtBattDateTime);
if (true == bHasStarterOnElem)
{
// if we have at least one engine starter cycle, then we count form the last engine starter cycle - error happens here -- !
stDischrgChrgCycle stdschrgCycleInWorks = m_mapDischrgChrgCyles[stcBattDatStarterOn.dtBattDateTime];
// and if average battery current is around zero, then we compute battery A*Hrs capacity based on charge accepted
// from the moment charging started (starter off) till now
if (m_iEngineStartEvtCnt > 0 && Math.Abs(m_dblAvrgCurrent100Smpls) < 1.2 && false == stdschrgCycleInWorks.bIsFullyRecharged)
{
long liBatteryChargeAccepted = (stRecentBattData.liQIn - stcBattDatCurrentCrossZero.liQIn) / 1000;
Debug.WriteLine("bValuateBatteryData() Battery is fully charged. Q in =" + liBatteryChargeAccepted.ToString() + " Q");
Debug.WriteLine("bValuateBatteryData() Battery capacity est. " + ((double)liBatteryChargeAccepted / 3600.0).ToString("#0.0") + " A*Hrs");
// workerObject.bLogDataToFile("Battery fully charged (based on ~0A average battery current");
stdschrgCycleInWorks.bIsFullyRecharged = true;
// save time stamp when battery fully charged
stdschrgCycleInWorks.stbtdtmWhenFullyCharged = stRecentBattData;
// find last discharge-charge cycle we used
m_mapDischrgChrgCyles[stcBattDatStarterOn.dtBattDateTime] = stdschrgCycleInWorks;
// update last discharge-charge cycle with new data
}
; // end IF true==bHasStarterOnEle
}
else
{
Debug.WriteLine("bValuateBatteryData() Cannot determine if Battery is fully charged, because starter ON event was not found " + stcBattDatStarterOn.dtBattDateTime.ToString("dd.HH:mm:ss.fff"));
};
}
// battery is now charging
//-------------------------------------------------------------------------------------------
// BATTERY CHARGING batt current > +0.2A
//--------------------------------------------------------------------------------------------
else if (stRecentBattData.dblBatAmperes > +0.2)
{
// Debug.WriteLine("bValuateBatteryData() battery charging");
if (stRecentBattData.chBattState != 'C')
{
Debug.WriteLine("bValuateBatteryData() ERR battery state mismatch - C");
}
;
// watch for maximum charging current
if (stRecentBattData.dblBatAmperes > m_sdblMaxBattChrgCurrent)
{
m_sdblMaxBattChrgCurrent = stRecentBattData.dblBatAmperes;
stcBattDatMaxChargCurr = stRecentBattData;
}
else
{
// once we get here the first time then battery charging current starts to drop,
// so note max charging current
// Debug.WriteLine("bValuateBatteryData() Max charging current=" + sdblMaxBattChrgCurrent.ToString("+#.#;-#.#;0"));
};
}
else
{
// tbd
Debug.WriteLine("bValuateBatteryData() TBD case");
};
// just store momentary data for the next run
stcBattPrevData = stRecentBattData;
// Debug.WriteLine("--bValuateBatteryData()="+bRes.ToString());
return(bRes);
} // end of bValuateBatteryData()
//
// this fucntion is called often or very often to process battery data
// can be used equally well for live battery data in real time or to process recorded battery data
//
public bool bValuateBatteryData(strctBattMonData stRecentBattData, int ciIterationNo)
{
bool bRes=false;
stDischrgChrgCycle stdschrgNewCycle=default(stDischrgChrgCycle); // neends init such as in DateTime dteSrc = default(DateTime),
TimeSpan tmspnStarterMotorRun;
// Debug.WriteLine("++bValuateBatteryData("+ciIterationNo+")");
// compute average current and keep it to eliminate noise in current sensor line
if(m_iCurrentAvrgIdx<m_ciCurrAvrgCount)
{
m_dblTempCurrent+=stRecentBattData.dblBatAmperes;
m_iCurrentAvrgIdx+=1;
}
else
{
m_dblAvrgCurrent100Smpls=m_dblTempCurrent / (double)m_ciCurrAvrgCount;
m_iCurrentAvrgIdx=0;
m_dblTempCurrent=0.0;
};
// on the very first iteration save this as beginning of recording
if(0==ciIterationNo)
{
stbtdtmTempFirstRecord=stRecentBattData;
if(null==m_arriTimesBetwItersHistogr)
{
m_arriTimesBetwItersHistogr=new int [ciMaxHistoSize];
};
// erase histogram as well
Array.Clear(m_arriTimesBetwItersHistogr,0,ciMaxHistoSize);
}
else
{
// next we check for Microcontroller errors.
TimeSpan tmspnBetwnIters=stRecentBattData.dtBattDateTime - stcBattPrevData.dtBattDateTime;
// Timer tick may be reported by microcontroller as inaccurate time, including jumping backawards
if(tmspnBetwnIters.TotalSeconds < 0.0)
// ignore very first inetration, since previous date-time is invalid
// if(tmspnBetwnIters.Days < 0)
{
Debug.WriteLine("bValuateBatteryData(ERROR) time jumped backwards! Previous=" + stcBattPrevData.dtBattDateTime.ToString("HH:mm:ss.fff") + " > New=" + stRecentBattData.dtBattDateTime.ToString("HH:mm:ss.fff"));
// fix up error - use last known good date-time
stRecentBattData.dtBattDateTime=stcBattPrevData.dtBattDateTime;
}
else
{
// for good iteration, save data to histogram
// Debug.WriteLine("bValuateBatteryData() Curr-Prev duration " + tmspnBetwnIters.Days.ToString() + "."+ tmspnBetwnIters.Hours.ToString("0#") +":"+ tmspnBetwnIters.Minutes.ToString("0#")+":"+tmspnBetwnIters.Seconds.ToString("0#.")+"."+tmspnBetwnIters.Milliseconds.ToString("000"));
int iIntervBetwIters=(int)tmspnBetwnIters.TotalMilliseconds;
if(iIntervBetwIters < ciMaxHistoSize)
{
m_arriTimesBetwItersHistogr[iIntervBetwIters]+=1;
};
// for every 1000 iterations, print a histoghram
if(0==ciIterationNo%999)
{
for(int j=0; j<ciMaxHistoSize; j++)
{
Debug.WriteLine("["+j.ToString()+"] : " + m_arriTimesBetwItersHistogr[j].ToString());
};
};
}; // end IF tmspnBetwnIters.TotalSeconds >0
}; // end IF check for Microcontroller errors.
// here we observe a few parameters including min and max of voltage and current
// as well as watch for engine starting pattern : starter mtr OFF, ON, OFF sequence
// criteria - low discharge current for several seconds - key on ignition on
// then high discharge current for a second or two - starter on
// then dischanrge current changes to charge current
// then battery gets strong charging which should quckly deacrease within 15 seconds if battery is healthy
//======================================================================
// -80A -40A -2A -0.1A 0A +0.1A +2A +100A
// str mtr | discharging | no load | charging
// { --->-------->-------->----} current crosses zero amperes line
//======================================================================
//-------------------------------------------------------------------------------------------
// BATTERY STRONG DISCHARGE. batt current <-80A
//--------------------------------------------------------------------------------------------
if(stRecentBattData.dblBatAmperes<-80.0) // starter surely draws more than that
{
//check if microcontroller correctly specified battery state
if(stRecentBattData.chBattState!='D')
{
Debug.WriteLine("bValuateBatteryData() ERR battery state mismatch - D");
};
// watch for maximum current starter draws - in-rush starter motor current
if(stRecentBattData.dblBatAmperes<m_sdblMaxBattDischrgCurrent)
{
m_sdblMaxBattDischrgCurrent=stRecentBattData.dblBatAmperes;
}
else
{
// Debug.WriteLine("bValuateBatteryData() Max discharging current=" + sdblMaxBattDischrgCurrent.ToString("+#.#;-#.#;0"));
};
if(true==m_bStarterMotorIsOn)
{
// starter motor keeps running...
Debug.WriteLine("bValuateBatteryData() starter mtr is RUNNING");
}
else
{
// starter motor just started
Debug.WriteLine("bValuateBatteryData() starter mtr is now ON !");
m_bStarterMotorIsOn=true;
stcBattDatStarterOn=stRecentBattData;
stcBattDatStarterOff=stcBattPrevData;
// create new discharge-charge cycle
stdschrgNewCycle.bIsCycleComplete=false;
stdschrgNewCycle.bIsFullyRecharged=false;
stdschrgNewCycle.dblMaxChrgCurrent=-99.0;
stdschrgNewCycle.dblMaxDischrgCurrent=m_sdblMaxBattDischrgCurrent;
stdschrgNewCycle.stbtdtmStarterOn=stRecentBattData;
stdschrgNewCycle.stbtdtmFirstRecord=stbtdtmTempFirstRecord;
if(null!=m_mapDischrgChrgCyles)
{
// you can use .Add function to ass new starter motor event data
try
{
m_mapDischrgChrgCyles.Add(stdschrgNewCycle.stbtdtmStarterOn.dtBattDateTime, stdschrgNewCycle);
}
catch (ArgumentException aexc)
{
Debug.WriteLine("bValuateBatteryData() battery already has this dis-chrg cycle on record, skip." + aexc.ToString());
};
// also can use array notation
// m_mapDischrgChrgCyles[stdschrgNewCycle.stbtdtmStarterOn.dtBattDateTime]=stdschrgNewCycle;
}; // end IF m_mapDischrgChrgCyles is not Null
}; // end IF true==m_bStarterMotorIsOn
}
// strong discharge case
//-------------------------------------------------------------------------------------------
// BATTERY DISCHARGE -80A < batt current < -2A
//--------------------------------------------------------------------------------------------
else if(stRecentBattData.dblBatAmperes>=-80.0 && stRecentBattData.dblBatAmperes<-2.0)
{
// Debug.WriteLine("bValuateBatteryData() battery discharging");
//check if microcontroller correctly specified battery state
if(stRecentBattData.chBattState!='D')
{
Debug.WriteLine("bValuateBatteryData() ERR battery state mismatch - D");
};
// when discharge current is not that big, i.e. not a starter mtr case
// battery discharging case
//-------------------------------------------------------------------------------------------
// BATTERY DISCHARGE -40A < batt current <-0.2A
//--------------------------------------------------------------------------------------------
if(true==m_bStarterMotorIsOn && stRecentBattData.dblBatAmperes>-40.0 && stRecentBattData.dblBatAmperes<-0.2)
{
Debug.WriteLine("bValuateBatteryData() starter mtr now OFF.");
// starter motor not running now
m_bStarterMotorIsOn=false;
stcBattDatStarterOffAfterOn=stRecentBattData;
stcBattDatCurrentCrossZero=stRecentBattData;
tmspnStarterMotorRun=stcBattDatStarterOffAfterOn.dtBattDateTime - stcBattDatStarterOn.dtBattDateTime;
// uncommenting line below causes exception in line reader
Debug.WriteLine("bValuateBatteryData() starter mtr duration="+tmspnStarterMotorRun.Seconds.ToString() +"."+tmspnStarterMotorRun.Milliseconds.ToString("000") + " sec");
// compute charge released for engine starting
double dblTempmQ=(stcBattDatStarterOffAfterOn.liQOut-stcBattDatStarterOn.liQOut);
Debug.WriteLine("bValuateBatteryData() Battery released " + (dblTempmQ/1000).ToString() + " Q to start engine");
if((stcBattDatStarterOff.dblBatAmperes-stcBattDatStarterOn.dblBatAmperes)!=0.0)
{
// compute battery internal resistance and related parameters
m_dblBatteryResistance=(stcBattDatStarterOff.dblBatVolts-stcBattDatStarterOn.dblBatVolts)/
(stcBattDatStarterOff.dblBatAmperes-stcBattDatStarterOn.dblBatAmperes);
Debug.WriteLine("bValuateBatteryData() batt R="+m_dblBatteryResistance.ToString("0.#000")+ " Ohm");
// estimate cranking amperes based on voltage-current
// Hot cranking amperes (HCA) is the amount of current a battery can provide at 80°F (26.7°C).
// The rating is defined as the current a lead-acid battery at that temperature can deliver for 30 seconds and maintain at least 1.2 V/cell (7.2 volts for a 12-volt battery).
// Cranking amperes (CA), also sometimes referred to as marine cranking amperes (MCA), is the amount of current a battery can provide at 32°F (0°C).
// The rating is defined as the number of amperes a lead-acid battery at that temperature can deliver for 30 seconds and maintain at least 1.2 V/cell (7.2 volts for a 12 volt battery).
// Cold cranking amperes (CCA) is the amount of current a battery can provide at 0°F (−18°C).
// The rating is defined as the current a lead-acid battery at that temperature can deliver for 30 seconds and maintain at least 1.2 volts per cell (7.2 volts for a 12-volt battery)
if(m_dblBatteryResistance!=0.0)
{
// example
// key on 12.1V,-6.4A; starter on 10.7V, -104A; R=(12.1-10.7)/(104-6)=1.4V/97.6A=0.014 Ohm
// knowing R predict CA by computation CA=(12.1-7.2)/R
m_dblCA=(stcBattDatStarterOff.dblBatVolts-7.2)/m_dblBatteryResistance;
Debug.WriteLine("bValuateBatteryData() batt CA="+m_dblCA.ToString("0000")+" Amperes");
};
//
// determine whether it was actual engine starting cyle or maybe just a momentary drop in battry current
//
// decision made is based on high discharge currnet value and duration of it
// Must draw high discharge current for at least 0.5 sec to qualify as engine starting event
// AND battery should be discharging : state=D and voltage should be < 12.6 Volts
if(tmspnStarterMotorRun.Seconds>=1 ||
(tmspnStarterMotorRun.Seconds==0 && tmspnStarterMotorRun.Milliseconds>500) )
{
m_iEngineStartEvtCnt+=1;
// modify last incomplete discharge-charge cycle and update its data
Debug.WriteLine("bValuateBatteryData() valid cycle duration " + tmspnStarterMotorRun.Seconds.ToString() +"."+tmspnStarterMotorRun.Milliseconds.ToString("000") + " sec detected. Completing dischrg-chrg cycle....");
// find our dis-chrg cycle in array and modify it to store starter off data
stDischrgChrgCycle stdschrgCycleInWorks=m_mapDischrgChrgCyles[stcBattDatStarterOn.dtBattDateTime];
// if found, modify data in place
//
// we have now stdschrgCycleInWorks.stbtdtmStarterOn part filled only.
// now populate stdschrgCycleInWorks.stbtdtmStarterOffAfterOn and other members
//
stdschrgCycleInWorks.bIsCycleComplete=true;
stdschrgCycleInWorks.dblMaxChrgCurrent=-99.0;
stdschrgCycleInWorks.dblBatteryResistance=m_dblBatteryResistance;
stdschrgCycleInWorks.dblCA=m_dblCA;
stdschrgCycleInWorks.dblMaxDischrgCurrent=m_sdblMaxBattDischrgCurrent;
stdschrgCycleInWorks.stbtdtmStarterOffAfterOn=stRecentBattData;
stdschrgCycleInWorks.tmspnStrMotorRunDur=tmspnStarterMotorRun;
stdschrgCycleInWorks.dblCoulmbsToStartEngine=dblTempmQ/1000.0;
// save it into array
m_mapDischrgChrgCyles[stcBattDatStarterOn.dtBattDateTime]=stdschrgCycleInWorks;
}
else
{
// not a engine starting cycle! Just very short current drop, e.g. downspike
Debug.WriteLine("bValuateBatteryData() Cycle duration too short: " + tmspnStarterMotorRun.Seconds.ToString() +"."+tmspnStarterMotorRun.Milliseconds.ToString("000") + " sec.");
Debug.WriteLine("bValuateBatteryData() Not a starter mtr cycle. Removing incomplete dischrg-chrg cycle....");
// so we delete previous spurious dischr-chrg cycle from our list
m_mapDischrgChrgCyles.Remove(stcBattDatStarterOn.dtBattDateTime);
};
}; // end IF of (stcBattDatStarterOff.dblBatAmperes-stcBattDatStarterOn.dblBatAmperes) !=0 Amp
// store time of this moment and watch for 15 minutes from it - battery should quckly charge, charge current decrease
}; // end IF of true==m_bStarterMotorIsOn
}
//
// when battery current current crosses zero Ampreres line
// this includes NO LOAD case as well - see inner check
else if(stRecentBattData.dblBatAmperes>=-2.0 && stRecentBattData.dblBatAmperes<=+2.0)
{
//-------------------------------------------------------------------------------------------
// BATTERY NO LOAD -0.1A < batt current <+0.1A
//--------------------------------------------------------------------------------------------
if(stRecentBattData.dblBatAmperes>=-0.1 && stRecentBattData.dblBatAmperes<=+0.1)
{
// Debug.WriteLine("bValuateBatteryData() batt no load");
// may update SoC bars for NL case here
//check if microcontroller correctly specified battery state
if(stRecentBattData.chBattState!='I')
{
Debug.WriteLine("bValuateBatteryData() ERR battery state mismatch - NL");
};
};
//
// check to determine if we are coming here just after engine starting cycle
// - to find out, we determine if an element is present with date-time of starter motor was switched on
bool bHasStarterOnElem=m_mapDischrgChrgCyles.ContainsKey(stcBattDatStarterOn.dtBattDateTime);
if(true==bHasStarterOnElem)
{
// if we have at least one engine starter cycle, then we count form the last engine starter cycle - error happens here -- !
stDischrgChrgCycle stdschrgCycleInWorks=m_mapDischrgChrgCyles[stcBattDatStarterOn.dtBattDateTime];
// and if average battery current is around zero, then we compute battery A*Hrs capacity based on charge accepted
// from the moment charging started (starter off) till now
if(m_iEngineStartEvtCnt>0 && Math.Abs(m_dblAvrgCurrent100Smpls)<1.2 && false==stdschrgCycleInWorks.bIsFullyRecharged)
{
long liBatteryChargeAccepted=(stRecentBattData.liQIn-stcBattDatCurrentCrossZero.liQIn)/1000;
Debug.WriteLine("bValuateBatteryData() Battery is fully charged. Q in ="+liBatteryChargeAccepted.ToString()+" Q");
Debug.WriteLine("bValuateBatteryData() Battery capacity est. "+((double)liBatteryChargeAccepted/3600.0).ToString("#0.0")+" A*Hrs");
// workerObject.bLogDataToFile("Battery fully charged (based on ~0A average battery current");
stdschrgCycleInWorks.bIsFullyRecharged=true;
// save time stamp when battery fully charged
stdschrgCycleInWorks.stbtdtmWhenFullyCharged=stRecentBattData;
// find last discharge-charge cycle we used
m_mapDischrgChrgCyles[stcBattDatStarterOn.dtBattDateTime]=stdschrgCycleInWorks;
// update last discharge-charge cycle with new data
}; // end IF true==bHasStarterOnEle
}
else
{
Debug.WriteLine("bValuateBatteryData() Cannot determine if Battery is fully charged, because starter ON event was not found "+stcBattDatStarterOn.dtBattDateTime.ToString("dd.HH:mm:ss.fff"));
};
}
// battery is now charging
//-------------------------------------------------------------------------------------------
// BATTERY CHARGING batt current > +0.2A
//--------------------------------------------------------------------------------------------
else if(stRecentBattData.dblBatAmperes>+0.2)
{
// Debug.WriteLine("bValuateBatteryData() battery charging");
if(stRecentBattData.chBattState!='C')
{
Debug.WriteLine("bValuateBatteryData() ERR battery state mismatch - C");
};
// watch for maximum charging current
if(stRecentBattData.dblBatAmperes>m_sdblMaxBattChrgCurrent)
{
m_sdblMaxBattChrgCurrent=stRecentBattData.dblBatAmperes;
stcBattDatMaxChargCurr=stRecentBattData;
}
else
{
// once we get here the first time then battery charging current starts to drop,
// so note max charging current
// Debug.WriteLine("bValuateBatteryData() Max charging current=" + sdblMaxBattChrgCurrent.ToString("+#.#;-#.#;0"));
};
}
else
{
// tbd
Debug.WriteLine("bValuateBatteryData() TBD case");
};
// just store momentary data for the next run
stcBattPrevData=stRecentBattData;
// Debug.WriteLine("--bValuateBatteryData()="+bRes.ToString());
return bRes;
}