PriusPlus History-PseudoCode - Revision history

Rjf: rm dup Category:Prius PHEV

2007-10-09T08:51:43Z

rm dup Category:Prius PHEV

Perfectsky: /* CAN Parameters */cleaning up spelling and grammar

2007-02-18T05:57:39Z

CAN Parameters: cleaning up spelling and grammar

Rjf: Categories

2006-10-07T02:58:57Z

Rjf: {{PriusPlus History}}

2006-10-07T02:53:08Z

Rjf: Prius PHEV Pseudo Code moved to PriusPlus History-PseudoCode

2006-10-07T02:51:42Z

Prius PHEV Pseudo Code moved to PriusPlus History-PseudoCode

DavideAndrea: English corrections

2006-06-16T22:16:03Z

English corrections

Rjf: changed 82% SOC target to 78%

2006-03-20T07:53:36Z

changed 82% SOC target to 78%

Rjf: Intro update

2006-03-18T03:52:28Z

Intro update

Rjf: Category:Prius PHEV

2006-03-16T10:51:02Z

Category:Prius PHEV

Rjf: Initial Page.

2006-03-10T02:57:50Z

Initial Page.

New page

This is the management pseudo code which determines how one particular [[Prius PHEV]] implamentation functions.

It may be incomplete and is intended to be general enough to be implamented on various hardware.

==CAN Parameters==
Thess are CAN Parameters of particular interest used in the pseudo code:
* '''SOC''' - The reported SOC is used to determine when to enable the SOC Spoofing circuit which raises the perceived or reported SOC.
* '''Speed''' - Used to determine when to re-enter EV-mode after leaving it due to high speed or power demand.
* '''Voltage''' - The reported Voltage is that measured by the Prius which may or may not be the '''Real Voltage'''.
* '''Amperage''' - The reported Amperage is the amount of current being removed from or added to the battery.
* '''Temperature''' - Battery temp used for temperature conpensation.
* '''Spoof Voltage''' - Determined by measuring the difference in reported '''Voltage''' which occurs when the SOC Spoofing circuit is enabled.
* '''Real Voltage''' - Used to determine the replacement HV batteries real SOC.
** Real Voltage is reported '''Voltage''' if the SOC Spoof circuit is disabled.
** Real Voltage is ''Spoof Voltage'' subtracted from reported '''Voltage''' if SOC Spoof circuit is enabled.
* '''Real SOC''' - Could be determined in a number of ways using '''Real Voltage''' and reported '''Amperage'''. <br> '' ''' This aspect had not been fully resolved, so more details are sure to come at a later time''' ''
** Zero Crossing SOC - Used to determine the real SOC by measuring '''Real Voltage''' as '''Amperage''' crosses zero.
** Under Load SOC - Used by combining '''Real Voltage''' and reported '''Amperage''' in a manner to determine the batteries internal resistance, which is an indication the batteries SOC.
** Watt Hour SOC - By counting Watt Hours removed from and added to the battery one can determine how much energy is left in a battery given that you knew how much you had to begin with, the capacity of the battery, and it's puckert characteristics. Unfortunantly WH counting is unlikely to be accurate based on the amperage, voltage, and power levels reported on the CAN buss as these are pre-filtered. Additional hardware such as a dedicated WH meter would be nesicarily to implement this type of SOC indication, however it may not be a bad idea use such a device even if not integrated as a control device.
*** [[EVDL_Maillist:2005./7./115|EVDL_Maillist:2005./7./115 State of Charge calculations]] - Lee Hart [http://autos.groups.yahoo.com/group/ev-list-archive/message/42428] [http://autos.groups.yahoo.com/group/ev-list-archive/message/42128]
*** [[EVDL_Maillist:2003./8./333|EVDL_Maillist:2003./8./333 Looking for a dual needle gauge ( amps & volts )]] - T Humphrey - [http://www.qsl.net/k5lxp/ev/evgauge/evgauge.html Mark Brueggemann's meter]
*** [http://shop.altenergystore.com/itemdesc~product~Link+10+Deluxe+Battmon%2D1000a+Shnt%2C+Rs232~ic~XANLINK10%2D1000A~eq~~Tp~.htm Xantrex Link 10]
*** [[WikiPedia:Battery pack]] for more SOC calculation discussions.

==User Settings==
* Note: Below within the code logic ''_XX_'' are user settings, the listed value is a best guess default for that setting. These may need to be changed in order to allow for various battery chemestries and user preferances.
** ''_30_''seconds - Denied Timeout
** ''_82_''% - Spoof circuit enable SOC level
** ''_20_''% - Real SOC lower limit
** ''_40_''% - Real SOC PHEV entry lower limit
** ''_33_''MPH - EV-Mode re-entry speed

==Pseudo Code Logic==
* Initialization and Discovery:
** Upon startup the current state of the system is unknow, has the battery been left discharged or is it fully charged?
*** Determine current '''Real SOC''', using '''Temperature''' compensated no-load or zero-crossing '''Real Voltage'''.
** Depending on the user settings and the CAN management device PHEV mode might be entered immediatly given that '''Real SOC''' is high enough. ''Temperature might also be considered if it is very low, sub-freezing?''. ''Defroster settings might also disable PHEV-Mode from the Prius side of the system''.
*** Enter EV-Mode, Verify EV-Mode was entered
**** If EV-Mode denied, timeout re-attempts for ''_30_'' seconds
** If '''SOC''' < ''_82_''%
*** Then enable SOC Spoof circuit
**** Measure voltage differance to aquire '''Spoof Voltage'''. ''Cycling of the SOC Spoofing circuit for multiple samples may provide more accurate readings''. ''This setting might be saved by the CAN management device as it should rarely change and is manually set''.
*** Else disable SOC Spoof circuit
**** still enable momentarily to determine '''Spoof Voltage'''.

* PHEV-Mode Loop Start
** If '''SOC''' < ''_82_''%
*** Then enable SOC Spoof circuit
*** Else disable SOC Spoof circuit
** If '''Speed''' < ''_33_'' MPH and EV-Mode is not enabled
*** Re-enable EV-mode
**** If EV-mode denied, timeout re-attempts for ''_30_'' seconds
** If '''Real SOC''' < ''_30_''%
*** Then leave PHEV mode and return to normal HEV mode, End PHEV-Mode Loop, Enter HEV-Mode Loop.
** Return to PHEV-Mode Loop Start

* HEV-Mode Loop Start
** If '''Real SOC''' > ''_40_''%
*** Then re-enter PHEV-Mode Loop
* Return to HEV-Mode Loop Start

@@ Line 73: / Line 73: @@
 [[Category:PHEV]]
 [[Category:Prius]]
 [[Category:CalCars]]

← Older revision		Revision as of 02:58, 7 October 2006
Line 71:		Line 71:
	* Return to HEV-Mode Loop Start		* Return to HEV-Mode Loop Start

		+	[[Category:PHEV]]
		+	[[Category:Prius]]
	[[Category:Prius PHEV]]		[[Category:Prius PHEV]]
		+	[[Category:CalCars]]

← Older revision		Revision as of 02:53, 7 October 2006
Line 1:		Line 1:
		+	{{PriusPlus History}}
		+
	This is the '''Prius PHEV Pseudo Code''' which determines how the [[Prius PHEV#CalCars Method]] implementation functions.		This is the '''Prius PHEV Pseudo Code''' which determines how the [[Prius PHEV#CalCars Method]] implementation functions.
	It may be incomplete and is intended to be general enough to be implemented with various [[Prius PHEV User Interfaces]] hardware and software.		It may be incomplete and is intended to be general enough to be implemented with various [[Prius PHEV User Interfaces]] hardware and software.

@@ Line 1: / Line 1: @@
-This is the '''Prius PHEV Pseudo Code''' which determines how the [[Prius PHEV#CalCars Method]] implamentation functions.
+This is the '''Prius PHEV Pseudo Code''' which determines how the [[Prius PHEV#CalCars Method]] implementation functions.
-It may be incomplete and is intended to be general enough to be implamented with various [[Prius PHEV User Interfaces]] hardware and software.
+It may be incomplete and is intended to be general enough to be implemented with various [[Prius PHEV User Interfaces]] hardware and software.
-It's primary goal is to exploit [[State Of Charge Drift]] in order to accomplish [[State Of Charge Manipulation]].
+Its primary goal is to exploit [[State Of Charge Drift]] in order to accomplish [[State Of Charge Manipulation]].
 ==CAN Parameters==
-Thess are [[CAN]] Parameters of particular interest used in the pseudo code:
+These are [[CAN]] Parameters of particular interest used in the pseudo code:
 * '''[[SOC]]''' - The reported SOC is used to determine when to enable the SOC Spoofing circuit which raises the perceived or reported SOC.
 * '''Speed''' - Used to determine when to re-enter EV-mode after leaving it due to high speed or power demand.
@@ Line 17: / Line 17: @@
 ** Zero Crossing SOC - Used to determine the real SOC by measuring '''Real Voltage''' as '''Amperage''' crosses zero.
 ** Under Load SOC - Used by combining '''Real Voltage''' and reported '''Amperage''' in a manner to determine the batteries internal resistance, which is an indication the batteries SOC.
-** Watt Hour SOC - By counting Watt Hours removed from and added to the battery one can determine how much energy is left in a battery given that you knew how much you had to begin with, the capacity of the battery, and it's puckert characteristics.  Unfortunantly WH counting is unlikely to be accurate based on the amperage, voltage, and power levels reported on the CAN buss as these are pre-filtered.  Additional hardware such as a dedicated WH meter would be nesicarily to implement this type of SOC indication, however it may not be a bad idea use such a device even if not integrated as a control device.
+** Watt Hour SOC - By counting Watt Hours removed from and added to the battery one can determine how much energy is left in a battery given that you knew how much you had to begin with, the capacity of the battery, and it's puckert characteristics.  Unfortunantly WH counting is unlikely to be accurate based on the amperage, voltage, and power levels reported on the CAN buss as these are pre-filtered.  Additional hardware such as a dedicated WH meter would be necessary to implement this type of SOC indication. However it may not be a bad idea to use such a device even if not integrated as a control device.
 *** [[EVDL_Maillist:2005./7./115|EVDL_Maillist:2005./7./115 State of Charge calculations]] - Lee Hart [http://autos.groups.yahoo.com/group/ev-list-archive/message/42428] [http://autos.groups.yahoo.com/group/ev-list-archive/message/42128]
 *** [[EVDL_Maillist:2003./8./333|EVDL_Maillist:2003./8./333 Looking for a dual needle gauge ( amps & volts )]] - T Humphrey - [http://www.qsl.net/k5lxp/ev/evgauge/evgauge.html Mark Brueggemann's meter]

← Older revision		Revision as of 10:51, 16 March 2006
Line 67:		Line 67:
	*** Then re-enter PHEV-Mode Loop		*** Then re-enter PHEV-Mode Loop
	* Return to HEV-Mode Loop Start		* Return to HEV-Mode Loop Start
		+
		+	[[Category:Prius PHEV]]

← Older revision	Revision as of 02:51, 7 October 2006
(No difference)

@@ Line 19: / Line 19: @@
 ** Watt Hour SOC - By counting Watt Hours removed from and added to the battery one can determine how much energy is left in a battery given that you knew how much you had to begin with, the capacity of the battery, and it's puckert characteristics.  Unfortunantly WH counting is unlikely to be accurate based on the amperage, voltage, and power levels reported on the CAN buss as these are pre-filtered.  Additional hardware such as a dedicated WH meter would be nesicarily to implement this type of SOC indication, however it may not be a bad idea use such a device even if not integrated as a control device.
 *** [[EVDL_Maillist:2005./7./115|EVDL_Maillist:2005./7./115 State of Charge calculations]] - Lee Hart [http://autos.groups.yahoo.com/group/ev-list-archive/message/42428] [http://autos.groups.yahoo.com/group/ev-list-archive/message/42128]
-*** [[EVDL_Maillist:2003./8./333|EVDL_Maillist:2003./8./333 Looking for a dual needle gauge ( amps & volts )]] - T Humphrey - [http://www.qsl.net/k5lxp/ev/evgauge/evgauge.html Mark Brueggemann's meter]<!-- 1.75VPC (Volts Per Cell) at 75A draw.
+*** [[EVDL_Maillist:2003./8./333|EVDL_Maillist:2003./8./333 Looking for a dual needle gauge ( amps & volts )]] - T Humphrey - [http://www.qsl.net/k5lxp/ev/evgauge/evgauge.html Mark Brueggemann's meter]
   Measured/Calculated Battery Pack Impedance Chart
   As measured at the input to the controller.
@@ Line 33: / Line 34: @@
 * Note: Below within the code logic ''_XX_'' are user settings, the listed value is a best guess default for that setting.  These may need to be changed in order to allow for various battery chemestries and user preferances.
 ** ''_30_''seconds - Denied Timeout
-** ''_82_''% - Spoof circuit enable SOC level
+** ''_78_''% - Spoof circuit enable SOC level
 ** ''_20_''% - Real SOC lower limit
 ** ''_40_''% - Real SOC PHEV entry lower limit
@@ Line 46: / Line 47: @@
 *** Enter EV-Mode, Verify EV-Mode was entered
 **** If EV-Mode denied, timeout re-attempts for ''_30_'' seconds
-** If '''SOC''' < ''_82_''%
+** If '''SOC''' < ''_78_''%
 *** Then enable SOC Spoof circuit
 **** Measure voltage differance to aquire '''Spoof Voltage'''.  ''Cycling of the SOC Spoofing circuit for multiple samples may provide more accurate readings''. ''This setting might be saved by the CAN management device as it should rarely change and is manually set''.
@@ Line 53: / Line 54: @@
 * PHEV-Mode Loop Start
-** If '''SOC''' < ''_82_''%
+** If '''SOC''' < ''_78_''%
 *** Then enable SOC Spoof circuit
 *** Else disable SOC Spoof circuit