9.9. Low Voltage Power System Controller - LvPwrSysCtlr

• Overview

• Functions

• Ports

• Parameters

Id	LvPwrSysCtlr
Version	main
Title	Low Voltage Power System Controller
System	Low Voltage Power
Document Type	Application Software Component Specification Preview

9.9.1. Overview

The Low Voltage Power System Controller manages the low voltage power system of the vehicle. It controls the LV state, charging, and interfaces with the DCDCs and other vehicle systems like VSM and HVPM. The controller monitors faults and manages fail-safe behaviors.

9.9.2. Functions

	Title	Description
1	LV State Control	Determines the overall LV system state (On, Off, Fault) based on the states of the individual DCDCs and fault conditions. Commands DCDCs to the appropriate modes.
2	LV Charging Control	Controls LV charging by enabling/disabling the DCDCs based on VSM state, HV state, and battery state of charge.
3	DCDC Interface	Interfaces with the DCDC controllers to send commands and receive status. Monitors DCDC faults and manages DCDC resets.
4	VSM Interface	Receives VSM state and determines appropriate DCDC commands based on VSM state transitions.
5	HVPM Interface	Receives HV state and current limit from HVPM. Adjusts DCDC current limit based on HVPM limit.
6	Fault Handling	Detects LV system faults based on DCDC faults, communication faults, voltage faults, etc. Executes fail-safe actions and sets DTCs.
7	Diagnostics	Provides diagnostic interfaces for LV system state and faults. Sets DTCs for detected faults.

9.9.3. Ports

	Id	Direction	Data Type	Dimensions	Unit	Keywords
1	OverHeatAlert1	Incoming	Enum: CmnenaAcvnSt	[-1]	inherit	Over Heat Alert1
2	OverHeatAlert1Vld	Incoming	boolean	[-1]	inherit	Over Heat Alert1 Valid
3	OverHeatAlert2	Incoming	Enum: CmnenaAcvnSt	[-1]	inherit	Over Heat Alert2
4	OverHeatAlert2Vld	Incoming	boolean	[-1]	inherit	Over Heat Alert2 Valid
5	OverHeatAlert3	Incoming	Enum: CmnenaAcvnSt	[-1]	inherit	Over Heat Alert3
6	OverHeatAlert3Vld	Incoming	boolean	[-1]	inherit	Over Heat Alert3 Valid
7	Dcdc1DrvrSt	Incoming	Enum: CmnenaOprtgSt	[-1]	inherit	Dcdc1 Driver State
8	Dcdc2DrvrSt	Incoming	Enum: CmnenaOprtgSt	[-1]	inherit	Dcdc2 Driver State
9	Dcdc3DrvrSt	Incoming	Enum: CmnenaOprtgSt	[-1]	inherit	Dcdc3 Driver State
10	Dcdc1DrvrStVld	Incoming	boolean	[-1]	inherit	Dcdc1 Driver State Valid
11	Dcdc2DrvrStVld	Incoming	boolean	[-1]	inherit	Dcdc2 Driver State Valid
12	Dcdc3DrvrStVld	Incoming	boolean	[-1]	inherit	Dcdc3 Driver State Valid
13	Dcdc1LvCur	Incoming	single	[-1]	inherit	Dcdc1 Lv Current
14	Dcdc2LvCur	Incoming	single	[-1]	inherit	Dcdc2 Lv Current
15	Dcdc3LvCur	Incoming	single	[-1]	inherit	Dcdc3 Lv Current
16	Dcdc1LvCurVld	Incoming	boolean	[-1]	inherit	Dcdc1 Lv Current Valid
17	Dcdc2LvCurVld	Incoming	boolean	[-1]	inherit	Dcdc2 Lv Current Valid
18	Dcdc3LvCurVld	Incoming	boolean	[-1]	inherit	Dcdc3 Lv Current Valid
19	SnsLvBmsCur	Incoming	single	[-1]	inherit	Sense Lv Bms Current
20	SnsLvBmsCurVld	Incoming	boolean	[-1]	inherit	Sense Lv Bms Current Valid
21	SnsBatSoc	Incoming	single	[-1]	inherit	Sense Battery Soc
22	SnsBatSocVld	Incoming	boolean	[-1]	inherit	Sense Battery Soc Valid
23	Dcdc1USpReq	Incoming	single	[-1]	inherit	Dcdc1 Voltage Setpoint Request
24	Dcdc2USpReq	Incoming	single	[-1]	inherit	Dcdc2 Voltage Setpoint Request
25	Dcdc3USpReq	Incoming	single	[-1]	inherit	Dcdc3 Voltage Setpoint Request
26	Dcdc1USpReqVld	Incoming	boolean	[-1]	inherit	Dcdc1 Voltage Setpoint Request Valid
27	Dcdc2USpReqVld	Incoming	boolean	[-1]	inherit	Dcdc2 Voltage Setpoint Request Valid
28	Dcdc3USpReqVld	Incoming	boolean	[-1]	inherit	Dcdc3 Voltage Setpoint Request Valid
29	LvCritFlt	Incoming	boolean	[-1]	inherit	Lv Critical Fault
30	LvCritFltVld	Incoming	boolean	[-1]	inherit	Lv Critical Fault Valid
31	BatSocLo	Incoming	Enum: CmnenaEveNotifSt	[-1]	inherit	Battery Soc Low
32	BatSocLoVld	Incoming	boolean	[-1]	inherit	Battery Soc Low Valid
33	RedFlt	Incoming	boolean	[-1]	inherit	Red Fault
34	HvComLvCnsLim	Incoming	single	[-1]	inherit	Hv Communication Lv Consumption Limit
35	RedFltVld	Incoming	boolean	[-1]	inherit	Red Fault Valid
36	HvComLvCnsLimVld	Incoming	boolean	[-1]	inherit	Hv Communication Lv Consumption Limit Valid
37	DcdcRdyToUpd	Incoming	boolean	[-1]	inherit	Dcdc Ready To Update
38	DcdcRdyToUpdVld	Incoming	boolean	[-1]	inherit	Dcdc Ready To Update Valid
39	DcdcOprtgSt	Incoming	Enum: CmnenaOprtgSt	[-1]	inherit	Dcdc Operating State
40	DcdcOprtgStVld	Incoming	boolean	[-1]	inherit	Dcdc Operating State Valid
41	VehSt	Incoming	Enum: CmnenaVehSt	[-1]	inherit	Vehicle State
42	VehStVld	Incoming	boolean	[-1]	inherit	Vehicle State Valid
43	Dcdc1HvilExtSt	Incoming	Enum: CmnenaOprtgSt	[-1]	inherit	Dcdc1 Hvil External State
44	Dcdc2HvilExtSt	Incoming	Enum: CmnenaOprtgSt	[-1]	inherit	Dcdc2 Hvil External State
45	Dcdc3HvilExtSt	Incoming	Enum: CmnenaOprtgSt	[-1]	inherit	Dcdc3 Hvil External State
46	Dcdc1HvilSt	Incoming	Enum: CmnenaOprtgSt	[-1]	inherit	Dcdc1 Hvil State
47	Dcdc2HvilSt	Incoming	Enum: CmnenaOprtgSt	[-1]	inherit	Dcdc2 Hvil State
48	Dcdc3HvilSt	Incoming	Enum: CmnenaOprtgSt	[-1]	inherit	Dcdc3 Hvil State
49	Dcdc1HvilExtStVld	Incoming	boolean	[-1]	inherit	Dcdc1 Hvil External State Valid
50	Dcdc2HvilExtStVld	Incoming	boolean	[-1]	inherit	Dcdc2 Hvil External State Valid
51	Dcdc3HvilExtStVld	Incoming	boolean	[-1]	inherit	Dcdc3 Hvil External State Valid
52	Dcdc1HvilStVld	Incoming	boolean	[-1]	inherit	Dcdc1 Hvil State Valid
53	Dcdc2HvilStVld	Incoming	boolean	[-1]	inherit	Dcdc2 Hvil State Valid
54	Dcdc3HvilStVld	Incoming	boolean	[-1]	inherit	Dcdc3 Hvil State Valid
55	LvUpdOtaReq	Incoming	Enum: CmnenaLvOtaReq	[-1]	inherit	Lv Update Ota Request
56	LvUpdOtaReqVld	Incoming	boolean	[-1]	inherit	Lv Update Ota Request Valid
57	HvSt	Incoming	Enum: CmnenaHvSt	[-1]	inherit	Hv State
58	HvStVld	Incoming	boolean	[-1]	inherit	Hv State Valid
59	Diagc	Outgoing	Bus: DcdccDiagc	[-1]	inherit	Diagnostic
60	LvSysChrg	Outgoing	boolean	[-1]	inherit	Lv System Charging
61	LvSysChrgSnd	Outgoing	boolean	[-1]	inherit	Lv System Charging Send
62	LvVehCur	Outgoing	single	[-1]	inherit	Lv Vehicle Current
63	LvVehCurVld	Outgoing	boolean	[-1]	inherit	Lv Vehicle Current Valid
64	DcdcCurLim	Outgoing	uint16	[-1]	inherit	Dcdc Current Limit
65	DcdcCurLimVSnd	Outgoing	boolean	[-1]	inherit	Dcdc Current Limit Velocity Send
66	Dcdc1SetU	Outgoing	single	[-1]	inherit	Dcdc1 Set Voltage
67	Dcdc2SetU	Outgoing	single	[-1]	inherit	Dcdc2 Set Voltage
68	Dcdc3SetU	Outgoing	single	[-1]	inherit	Dcdc3 Set Voltage
69	Dcdc1SetUSnd	Outgoing	boolean	[-1]	inherit	Dcdc1 Set Voltage Send
70	Dcdc2SetUSnd	Outgoing	boolean	[-1]	inherit	Dcdc2 Set Voltage Send
71	Dcdc3SetUSnd	Outgoing	boolean	[-1]	inherit	Dcdc3 Set Voltage Send
72	LvRdyToUpd	Outgoing	boolean	[-1]	inherit	Lv Ready To Update
73	LvRdyToUpdSnd	Outgoing	boolean	[-1]	inherit	Lv Ready To Update Send
74	LvRdyToSlp	Outgoing	boolean	[-1]	inherit	Lv Ready To Sleep
75	LvRdyToSlpSnd	Outgoing	boolean	[-1]	inherit	Lv Ready To Sleep Send
76	LvSt	Outgoing	Enum: CmnenaOprtgSt	[-1]	inherit	Lv State
77	LvStSnd	Outgoing	boolean	[-1]	inherit	Lv State Send
78	LvRdyToDrv	Outgoing	boolean	[-1]	inherit	Lv Ready To Drive
79	LvRdyToDrvSnd	Outgoing	boolean	[-1]	inherit	Lv Ready To Drive Send
80	HvAcv	Outgoing	Enum: CmnenaAcvnSt	[-1]	inherit	Hv Active
81	HvAcvSnd	Outgoing	boolean	[-1]	inherit	Hv Active Send
82	VsmCmd	Outgoing	Enum: CmnenaAcvnSt	[-1]	inherit	Vsm Command
83	VsmCmdSnd	Outgoing	boolean	[-1]	inherit	Vsm Command Send
84	Dcdc1DmdMod	Outgoing	Enum: CmnenaOprtgSt	[-1]	inherit	Dcdc1 Demand Mode
85	Dcdc2DmdMod	Outgoing	Enum: CmnenaOprtgSt	[-1]	inherit	Dcdc2 Demand Mode
86	Dcdc3DmdMod	Outgoing	Enum: CmnenaOprtgSt	[-1]	inherit	Dcdc3 Demand Mode
87	Dcdc1DmdModSnd	Outgoing	boolean	[-1]	inherit	Dcdc1 Demand Mode Send
88	Dcdc2DmdModSnd	Outgoing	boolean	[-1]	inherit	Dcdc2 Demand Mode Send
89	Dcdc3DmdModSnd	Outgoing	boolean	[-1]	inherit	Dcdc3 Demand Mode Send

9.9.4. Parameters

	Id	Data Type	Dimensions	Range	Unit	Description	Keywords
1	DcdccActiveSocThreshold	single	[1,1]	Min: 0, Max: 100	%	Minimum allowable LV battery state of charge for an OTA event to be allowed to proceed where the HV-LV DCDC remains active	Dcdcc Active Soc Threshold
2	DcdccCnvrEff	single	[1,1]	Min: 0, Max: 1		Power Efficiency Ratio	Dcdcc Converter Efficiency
3	DcdccCtlFltDly	single	[1,1]	Min: 0, Max: 7200	s	Timeout for LV controller reaction on the control fault (transiton into Fault state)	Dcdcc Control Fault Delay
4	DcdccCurLowrLim	single	[1,1]	Min: 0, Max: 400	A	Minimal value for DCDC Current Limit	Dcdcc Current Lower Limit
5	DcdccCurUpprLim	single	[1,1]	Min: 0, Max: 400	A	Maximum value for DCDC Current Limit	Dcdcc Current Upper Limit
6	DcdccDcdcFltDebTmr	uint8	[1,1]	Min: 0, Max: 60	s	Time delay to detect fault of no communication with 3rd party DCDC	Dcdcc Dcdc Fault Debounce Timer
7	DcdccDiCurShutDwn	boolean	[1,1]	Min: 0, Max: 1		Disabling LV vehicle current checks for VSM to Fully Sleep transition	Dcdcc Disable Current Shut Down
8	DcdccErrRstDly	single	[1,1]	Min: 0, Max: 7200	s	Timeout for getting out from OTA update Error	Dcdcc Error Reset Delay
9	DcdccHvilFltDebTmr	uint8	[1,1]	Min: 0, Max: 60	s	Time delay to detect fault of HVIL is not available	Dcdcc Hvil Fault Debounce Timer
10	DcdccIdleSocThreshold	single	[1,1]	Min: 0, Max: 100	%	Minimum allowable LV battery state of charge for an OTA event to be allowed to proceed where the HV-LV DCDC is commanded to idle	Dcdcc Idle Soc Threshold
11	DcdccIgnLvCritFlt	boolean	[1,1]	Min: 0, Max: 1		Disables LVCriticalFault	Dcdcc Ignore Lv Critical Fault
12	DcdccIgnRednFlt	boolean	[1,1]	Min: 0, Max: 1		Disables RedundancyFault	Dcdcc Ignore Reduction Fault
13	DcdccIgnVsmForUpd	boolean	[1,1]	Min: 0, Max: 1		Disable if VSM state Maintenance is not required for OTA LV update	Dcdcc Ignore Vsm For Update
14	DcdccLvCurShutDwnDly	single	[1,1]	Min: 0, Max: 7200	s	Time during what Actual LV Current Vehicle values should be less than LVC_LVCurrentShutdownThreshold	Dcdcc Lv Current Shut Down Delay
15	DcdccLvCurrentShutDownLimit	single	[1,1]	Min: 0, Max: 1000	A	Current threshold used to determine LV system state	Dcdcc Lv Current Shut Down Limit
16	DcdccOverHeatRstTi	single	[1,1]	Min: 0, Max: 7200	s	Additional delay before controller makes an attempt to reset DCDC in case of Overheat Fail	Dcdcc Over Heat Reset Time
17	DcdccOvrdRdyToSlp	boolean	[1,1]	Min: 0, Max: 1		Overrides ReadyToSleep when True	Dcdcc Override Ready To Sleep
18	DcdccRcvrAftFai	boolean	[1,1]	Min: 0, Max: 1		Indicates if LV system can be recovered after a failure	Dcdcc Recover After Failure
19	DcdccRdyForUpdTiout	single	[1,1]	Min: 0, Max: 10000	msec	Timeout for getting ready FW Update	Dcdcc Ready For Update Timeout
20	DcdccRstDly	single	[1,1]	Min: 0, Max: 7200	s	Delay before controller makes an attempt to reset DCDC in case it reported failure	Dcdcc Reset Delay
21	DcdccSetUThd	single	[1,1]	Min: 0, Max: 30	V	Voltage Threshold for switchint to Default Current Limit	Dcdcc Set Voltage Threshold
22	DcdccToErrorDelay	single	[1,1]	Min: 0, Max: 7200	s	Timeout for DCDC to switch into update-friendly state	Dcdcc To Error Delay
23	DcdccVsmFltDebTmr	uint8	[1,1]	Min: 0, Max: 60	s	Time threshold to determine fault	Dcdcc Vsm Fault Debounce Timer
24	DcdccDiChkBasdOnSt	boolean	[1,1]	Min: 0, Max: 1		Disables FW check based on dcdc state	Dcdcc Disable Check Based On State
25	DcdccQntyMask	boolean	[1,3]	Min: 0, Max: 1		Mask for Masters DCDC quantity setting. Note: if one DCDC used only - it has to be first	Dcdcc Quantity Mask
26	DcdccDftOutU	single	[1,1]	Min: 0, Max: 31	V	Nominal LV side DCDC voltage	Dcdcc Default Output Voltage
27	DcdccNoToRst	uint8	[1,1]	Min: 0, Max: 10		Number of DCDC reset attempts. If counter reaches the parameter’s value, controller reports fail.	Dcdcc Number To Reset
28	DcdccInizToOffSt	boolean	[1,1]	Min: 0, Max: 1		Indicates if LV Controller initial state is OFF	Dcdcc Initialize To Off State
29	DcdccIgnHvilChk	boolean	[1,3]	Min: 0, Max: 1		Disables HVIL check for each DCDC	Dcdcc Ignore Hvil Check
30	DcdccLvSysRcvryTi	single	[1,1]	Min: 0, Max: 7200	s	Timeout for recovery from controller’s Fault state and for DCDC reset attempts counter zeroing	Dcdcc Lv System Recovery Time
31	DcdccLvSysFaiDly	single	[1,1]	Min: 0, Max: 7200	s	LV System Failure Delay	Dcdcc Lv System Failure Delay
32	DcdccRdyToDrv	boolean	[1,1]	Min: 0, Max: 1		Indicates that LV system is not preventing vehicle to drive	Dcdcc Ready To Drive