CN112277851A - Vehicle multi-energy management 48V power-on and power-off control method and system - Google Patents

Vehicle multi-energy management 48V power-on and power-off control method and system Download PDF

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Publication number
CN112277851A
CN112277851A CN202011195390.4A CN202011195390A CN112277851A CN 112277851 A CN112277851 A CN 112277851A CN 202011195390 A CN202011195390 A CN 202011195390A CN 112277851 A CN112277851 A CN 112277851A
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power
state
gear
bsg
main switch
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CN202011195390.4A
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CN112277851B (en
Inventor
郄鹤峰
王睿
田学勇
姜杨
郑琴
张衡
刘双平
蒋学锋
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Dongfeng Trucks Co ltd
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Dongfeng Trucks Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/26—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the motors or the generators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/28—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the electric energy storing means, e.g. batteries or capacitors

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The invention discloses a method and a system for controlling the power-on and power-off of a whole vehicle under 48V multi-energy management, which relate to the field of electronic control of automobiles, and comprise a power-on step and a power-off step, wherein the power-on step specifically comprises the following steps: acquiring a main switch state and an ignition lock key state of a vehicle power supply; when the main switch state of the power supply is on, and the key state of the ignition lock is an OFF gear or is placed in an ACC gear from the OFF gear, controlling the power battery to be electrified based on the state of external input energy; when the main switch state of the power supply is ON and the key state of the ignition lock is set from an ACC gear to an ON gear, controlling the BSG to be electrified based ON the running state of the MCU, the electrifying state of the power battery and the rotating speed of the BSG motor; the invention can avoid the BSG being electrified under high voltage, and reduce the problem of disordered state of the electric control system caused by rapidly rotating the ignition lock.

Description

Vehicle multi-energy management 48V power-on and power-off control method and system
Technical Field
The invention relates to the field of electronic control of automobiles, in particular to a method and a system for controlling the multi-energy management of 48V power on and power off of a whole automobile.
Background
A48V mild hybrid electric vehicle is developed by mixing on the basis of a traditional vehicle, and is additionally provided with a BSG (Belt-drive Starter Generator) and a 48V battery on the basis of the traditional vehicle in order to realize some functions specific to a hybrid system. The conventional automobile has no high-voltage component similar to a hybrid automobile, and the power management of the conventional automobile is mainly weak current management of a 24V/12V low-voltage system, while the power system of the hybrid automobile is added with complex power electronic devices such as a BSG (base station Controller), an MCU (Micro Controller Unit), a power Battery pack, a BMS (Battery management system) and the like on the basis of the former and the latter compared with the conventional automobile.
For a 48V mild hybrid vehicle, it is very important how to perform power-on and power-off control of the vehicle. The conventional vehicle realizes 24V/12V power-up and power-down based on the key state, so in a 48V light hybrid electric vehicle, the 24V/12V power-up and power-down can also be realized based on the key state. In the power system of the 48V mild hybrid electric vehicle, if the key-based power-on and power-off mode of the conventional vehicle is adopted, newly added parts in the power system of the 48V mild hybrid electric vehicle, such as a BSG motor, a 48V battery and the like, can be damaged, and the safety and reliability of power-on and power-off are low. At present, the last lower electric scheme of current 48V mild Hybrid vehicle, at ignition lock ON shelves and START gear, HCU (Hybrid Control Unit, Hybrid vehicle Control Unit) is according to MCU (Micro Controller Unit, microcontroller) and BMS (Battery management system ) between the mutual check-up signal, Control BSG motor and 48V Battery and successively go up the lower electricity, nevertheless adopt this kind of scheme, can lead to: when a driver quickly turns a key, the power-on time sequence may be disordered, and the power-on safety and reliability cannot be guaranteed; when external energy sources (such as solar batteries and the like) and high-voltage electric loads (electric air conditioners) exist on a vehicle, the vehicle cannot be powered up when 48V electricity is needed for an OFF gear and an ACC gear of an ignition lock, and the utilization advantage of multiple energy sources cannot be brought to the maximum.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a vehicle multi-energy management 48V power-on and power-off control method and system, which can avoid the BSG being electrified at high voltage and reduce the problem of disordered states of an electric control system caused by rapidly rotating an ignition lock.
In order to achieve the above purpose, the invention provides a vehicle multi-energy management 48V power-on and power-off control method, which comprises a power-on step and a power-off step, wherein the power-on step specifically comprises the following steps:
acquiring a main switch state and an ignition lock key state of a vehicle power supply;
when the main switch state of the power supply is on, and the key state of the ignition lock is an OFF gear or is placed in an ACC gear from the OFF gear, controlling the power battery to be electrified based on the state of external input energy;
when the main switch state of the power supply is ON and the key state of the ignition lock is set from an ACC gear to an ON gear, controlling the BSG to be electrified based ON the running state of the MCU, the electrifying state of the power battery and the rotating speed of the BSG motor;
the powering down step comprises:
acquiring a main switch state and an ignition lock key state of a vehicle power supply;
when the main switch of the power supply is turned on and the key of the ignition lock is switched from an ACC gear to an OFF gear, the BSG is controlled to be powered OFF;
the power supply main switch state is switched from on to off, and the power battery is controlled to be directly powered off or to be powered off in a delayed mode based on the working state of the electrical appliance accessories.
On the basis of the above technical solution, the power-up step further includes:
when the main switch state of the power supply is OFF and the key state of the ignition lock is an OFF gear, the PCU, the BMS and the MCU are all in a non-working state;
when the main power switch state is on and the ignition lock key state is OFF, the PCU, the BMS, and the MCU are all activated.
On the basis of the technical scheme, when the main switch state of the power supply is on, the key state of the ignition lock is an OFF gear or an ACC gear is switched from the OFF gear, the power battery is controlled to be electrified based on the state of external input energy, and the method specifically comprises the following steps:
when the main power switch state is on and the ignition lock key state is OFF, if the input voltage of the solar battery is not less than a preset value and the SOC of the power battery is not more than a set value, the PCU sends an electric signal on the power battery to the BMS, the BMS controls the power battery to be powered on, otherwise, the PCU does not send the electric signal on the power battery to the BMS;
when the main switch state of the power supply is on and the key state of the ignition lock is in an ACC gear from an OFF gear, if the input voltage of the solar battery is not less than a preset value and the SOC of the power battery is not more than a set value, the PCU sends an electric signal on the power battery to the BMS, the BMS controls the power battery to be powered on, and otherwise, the PCU does not send the electric signal on the power battery to the BMS.
On the basis of the technical scheme, the BSG is controlled to be electrified based on the running state of the MCU, the power battery electrification state and the BSG motor rotating speed, and the method specifically comprises the following steps:
and when the running state of the MCU is a to-be-run state or a post-run ending state and the actual rotating speed of the BSG motor is less than the preset rotating speed, controlling the BSG to be powered on based on the power battery power-on state.
On the basis of the technical proposal, the device comprises a shell,
the to-be-operated state is that the BSG is not operated in one power-on cycle of the main switch of the power supply;
the post-run end state is that the BSG has run in one power-up cycle of the main power switch.
On the basis of the technical scheme, the controlling of the power-on of the BSG based on the power battery power-on state specifically includes:
if the power-on relay of the power battery is in a closed state, the PCU controls the working electric appliance accessories to be closed, the power-on relay of the power battery is disconnected, the MCU controls the BSG to be powered on, and then the PCU controls the power-on relay of the power battery to be closed;
if the power-on relay of the power battery is in an off state, the MCU controls the BSG to be powered on, and then the PCU controls the power-on relay of the power battery to be switched on.
On the basis of the technical scheme, after the BSG is controlled to be powered off, the method further comprises the following steps:
and the PCU monitors the working state of the electric equipment accessories, if all the electric equipment accessories are in the working stop state, the PCU controls the power-on relay of the power battery to be disconnected, otherwise, the power-on relay of the power battery is kept in the closed state.
On the basis of the technical scheme, the power supply main switch state is switched from on to off, and the power battery is controlled to be directly powered off or be powered off in a delayed mode based on the working state of the electrical appliance accessories, and the method specifically comprises the following steps:
when the power main switch state is switched from on to off, the MCU stops working, and the PCU judges the working state of the electric appliance accessories:
if all the electric appliance accessories are in the work stop state, the BMS and the PCU enter the sleep state;
if the electrical accessories in the working state exist, the PCU controls the electrical accessories in the working state to be turned off, then controls the power-on relay of the power battery to be turned off, and then the BMS and the PCU enter a sleep state.
The invention provides a vehicle multi-energy management 48V power-on and power-off control system, which comprises:
the power-on control module is used for acquiring the main switch state of the vehicle power supply and the key state of the ignition lock in the power-on step; when the main switch state of the power supply is on, and the key state of the ignition lock is an OFF gear or is placed in an ACC gear from the OFF gear, controlling the power battery to be electrified based on the state of external input energy; when the main switch state of the power supply is ON and the key state of the ignition lock is set from an ACC gear to an ON gear, controlling the BSG to be electrified based ON the running state of the MCU, the electrifying state of the power battery and the rotating speed of the BSG motor;
the power-off control module is used for acquiring the main switch state of the vehicle power supply and the key state of an ignition lock in the power-off step; when the main switch of the power supply is turned on and the key of the ignition lock is switched from an ACC gear to an OFF gear, the BSG is controlled to be powered OFF; the power supply main switch state is switched from on to off, and the power battery is controlled to be directly powered off or to be powered off in a delayed mode based on the working state of the electrical appliance accessories.
Compared with the prior art, the invention has the advantages that: the BSG is electrified based on the power battery electrification state, so that the power battery is in the power-off state when the BSG is electrified, the BSG is prevented from being electrified under high voltage, the problem of disorder of the state of an electric control system caused by rapid rotation of the ignition lock is solved, and when the BSG is not electrified, the electrical accessories can still use 48V electric energy, and the multi-energy power supply management requirement is facilitated.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a flow chart of a power-up step in an embodiment of the present invention;
FIG. 2 is a timing diagram of the 24V power, 48V power, MCU status, ignition lock key status in the embodiment of the present invention;
FIG. 3 is a flow chart of a power down step in an embodiment of the present invention;
fig. 4 is a schematic structural view of a hybrid electric control system of a vehicle according to an embodiment of the present invention.
Detailed Description
The invention provides a vehicle multi-energy management 48V power-on and power-off control method, which is characterized in that BSG is powered on based on the power-on state of a power battery, so that the power battery is in a power-off state when the BSG is powered on, the BSG is prevented from being powered on under high voltage, the problem of disorder of the state of an electric control system caused by rapidly rotating an ignition lock is solved, and electrical accessories can still use 48V electric energy when the BSG is not powered on, so that the multi-energy power supply management requirement is facilitated. The embodiment of the invention correspondingly provides a vehicle multi-energy management 48V power-on and power-off control system.
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The vehicle multi-energy management 48V power-on and power-off control method provided by the embodiment of the invention is suitable for 24V-48V weakly-mixed vehicles and 12V-48V weakly-mixed vehicles. For 24V vehicles, 12V vehicles, 48V and 24V hybrid vehicles and 48V and 12V hybrid vehicles, the operation sequence of the power switch at the time of power-on is as follows: turning ON a power main switch (an ignition key is in an OFF gear) → turning ON the ignition key from the OFF gear to the ACC gear → turning ON the ignition key from the ACC gear to the ON gear → turning ON the ignition key from the ON gear to the START gear (vehicle START); the operation sequence when powering down is as follows: turning OFF the ignition key from the ON gear to the ACC gear → turning OFF the ignition key from the ACC gear to the OFF gear → turning OFF the power main switch (the ignition key is in the OFF gear).
The 48V power-on and power-off control method for the whole vehicle multi-energy management provided by the embodiment of the invention comprises a power-on step and a power-off step. Referring to fig. 1, the power-up step specifically includes:
s101: acquiring a main switch state and an ignition lock key state of a vehicle power supply;
s102: when the main switch state of the power supply is on, and the key state of the ignition lock is an OFF gear or is placed in an ACC gear from the OFF gear, controlling the power battery to be electrified based on the state of external input energy;
s103: and when the main switch state of the power supply is turned ON and the key state of the ignition lock is set to be an ON gear from an ACC gear, controlling the BSG to be electrified based ON the running state of the MCU, the electrifying state of the power battery and the rotating speed of the BSG motor.
In the embodiment of the present invention, the step of powering up further includes: when the main switch state of the power supply is OFF and the key state of the ignition lock is an OFF gear, the PCU, the BMS and the MCU are all in a non-working state; when the main Power switch state is on and the ignition key state is OFF, the PCU (Power Control Unit), the BMS, and the MCU are all activated.
In the embodiment of the invention, when the main switch state of the power supply is on, the key state of the ignition lock is OFF gear or is placed in ACC gear from OFF gear, the power battery is controlled to be electrified based on the state of external input energy, and the method specifically comprises the following steps:
when the main power switch state is on and the ignition lock key state is OFF, if the input voltage of the solar battery is not less than a preset value and the SOC of the power battery is not more than a set value, the PCU sends an electric signal on the power battery to the BMS, the BMS controls the power battery to be powered on, otherwise, the PCU does not send the electric signal on the power battery to the BMS; and the PCU sends a power battery electrifying signal to the BMS through a hard wire or a bus, and then the BMS controls the power-on relay of the power battery to be closed, so that the power battery is electrified.
When the main switch state of the power supply is on and the key state of the ignition lock is in an ACC gear from an OFF gear, if the input voltage of the solar battery is not less than a preset value and the SOC of the power battery is not more than a set value, the PCU sends an electric signal on the power battery to the BMS, the BMS controls the power battery to be powered on, and otherwise, the PCU does not send the electric signal on the power battery to the BMS. When the main power switch is on and the ignition key is in the OFF position to the ACC position, the PCU is kept active and the BMS is kept active. When the main power switch is ON and the ignition key is ON from ACC, the PCU is activated and the BMS is activated.
In the embodiment of the invention, the BSG is controlled to be electrified based on the running state of the MCU, the power battery electrifying state and the BSG motor rotating speed, and the method specifically comprises the following steps: and when the running state of the MCU is a to-be-run state or a post-run ending state and the actual rotating speed of the BSG motor is less than the preset rotating speed, controlling the BSG to be powered on based on the power battery power-on state.
The standby state is that the BSG has not been operated in one power-up cycle of the power master switch, the ignition key state is OFF or ACC in the standby state, and the ignition key state is not ON in the current power-up cycle.
The post-run end state is that the BSG has run once in one power-up cycle of the power master switch, the ignition key state is OFF or ACC in the post-run end state, and the ignition key state is once in ON and is returned from ON to OFF or ACC in the current power-up cycle. By considering the repeated switching state of the ignition key from ACC-ON-ACC-ON, the BSG is prevented from being frequently powered up and down.
Fig. 2 shows a timing chart of the 24V power, the 48V power, the MCU state, and the ignition key state, where Pre-Run indicates a standby state, Run indicates an operating state, Post-Run indicates a Post-operating state, and Post-Run finished indicates a Post-operating end state. Each state of the MCU is sent out through a bus message, and the PCU can monitor.
In the embodiment of the invention, the power-on state of the power battery is used for controlling the power-on of the BSG, and the method specifically comprises the following steps: if the power-on relay of the power battery is in a closed state, the PCU controls the working electric appliance accessories to be closed, the power-on relay of the power battery is disconnected, the MCU controls the BSG to be powered on, and then the PCU controls the power-on relay of the power battery to be closed; if the power-on relay of the power battery is in an off state, the MCU controls the BSG to be powered on, and then the PCU controls the power-on relay of the power battery to be switched on. The electrical accessories are solar batteries, electric air conditioners, DC-DC and the like. DC-DC is a device that changes the electrical energy of one voltage value to the electrical energy of another voltage value in a direct current circuit.
Referring to fig. 3, the power-down step includes:
s201: acquiring a main switch state and an ignition lock key state of a vehicle power supply;
s202: when the main switch of the power supply is turned on and the key of the ignition lock is switched from an ACC gear to an OFF gear, the BSG is controlled to be powered OFF;
s203: the power supply main switch state is switched from on to off, and the power battery is controlled to be directly powered off or to be powered off in a delayed mode based on the working state of the electric accessory.
In the embodiment of the present invention, in the power-down step, after controlling the BSG to power down, the method further includes: and the PCU monitors the working state of the electric equipment accessories, if all the electric equipment accessories are in the working stop state, the PCU controls the power-on relay of the power battery to be disconnected, otherwise, the power-on relay of the power battery is kept in the closed state. When the BSG is powered off, the MCU is placed in a rear running state, the PCU monitors the working states of the electric equipment accessories after detecting that the MCU is in the rear running state, if all the electric equipment accessories are in a stop working state, the PCU controls the power-on relay of the power battery to be disconnected, otherwise, the power-on relay of the power battery is kept in a closed state.
In the embodiment of the invention, the power supply main switch state is switched from on to off, and the power battery is controlled to be directly powered off or to be powered off in a delayed mode based on the working state of an electrical appliance accessory, and the method specifically comprises the following steps:
when the power main switch state is switched from on to off, the MCU stops working, and the PCU judges the working state of the electric appliance accessories: if all the electric appliance accessories are in the work stop state, the BMS and the PCU enter the sleep state; if the electrical accessories in the working state exist, the PCU controls the electrical accessories in the working state to be turned off, then controls the power-on relay of the power battery to be turned off, and then the BMS and the PCU enter a sleep state.
It should be noted that, in the embodiment of the present invention, when the power master switch is turned ON and the key of the ignition lock is set to START from the ON position, the power-ON and power-off part does not additionally execute more operation logics and remains the same; when the main switch state of the power supply is ON and the key state of the ignition lock is in an ACC gear from an ON gear, the power-ON and power-off part does not additionally execute more action logics and keeps the original state. Meanwhile, the ignition lock key or the power main switch is not operated according to the sequence, and the logic judgment and the control command execution judgment are carried out according to the corresponding items according to the switching of the states. The preset value, the set value and the preset rotating speed in the embodiment of the invention can be calibrated and can also be adjusted according to experience or bench test values.
Referring to fig. 4, the 48V hybrid electric control system of the vehicle according to the embodiment of the present invention includes a 48V battery, a BMS, a BSG, an MCU, a DC-DC converter (48V to 24V or 48V to 12V), a solar battery, a 48V air conditioner compressor, a PCU, and related high and low voltage connection harnesses.
The software carrier of the method according to the embodiment of the present invention may be integrated in a VCU (Vehicle Control Unit, whole Vehicle controller for electric Vehicle), an HCU (Hybrid Control Unit, whole Vehicle controller for Hybrid electric Vehicle), a PCU, an EECU (Engine Electronic Control Unit, Engine Control Unit), or a BCM (Body Control Module), and Control related components through bus signals or hard wires. The mechanical form of the ignition LOCK key has a similar implementation form ON a real vehicle, and no matter whether the mechanical form is 4-gear (OFF-ACC-ON-START), 5-gear (LOCK-OFF-ACC-ON-START) or 4-gear (LOCK-ACC-ON-START), as long as 1 gear below the ACC gear, ON gear and ACC gear is provided, the total 3 ignition LOCK key gears implement the control logic, which is the implementation mode of the embodiment of the invention.
The control of the power-on relay is realized in the scheme, namely the PCU directly controls the power-on relay, or the PCU sends a bus signal or a hard wire signal to the BMS, and then the BMS controls the power-on relay. The specific forms of the 48V high-voltage electrical appliance accessories, such as the existence of solar energy, an electric air conditioner and DC-DC are all the implementation modes of the scheme. The 48V hybrid electric system is realized in a 48V-24V electric system or a 48V-12V electric system (the 12V electric system is 12V standard in the traditional storage battery, and the high-low voltage conversion DC-DC is 48V to 12V standard).
According to the vehicle multi-energy management 48V power-on and power-off control method provided by the embodiment of the invention, the BSG is powered on based on the power-on state of the power battery, so that the power battery is in a power-off state when the BSG is powered on, the BSG is prevented from being powered on at high voltage, the problem of disorder of the state of an electric control system caused by rapidly rotating an ignition lock is solved, and electrical accessories can still use 48V electric energy when the BSG is not powered on, so that the multi-energy power supply management requirement is facilitated, the delayed power-off requirement is met, and the BSG can be prevented from being damaged due to the.
The vehicle multi-energy management 48V power-on and power-off control system provided by the embodiment of the invention comprises a power-on control module and a power-off control module. The power-on control module is used for acquiring the main switch state of the vehicle power supply and the key state of the ignition lock in the power-on step; when the main switch state of the power supply is on, and the key state of the ignition lock is an OFF gear or is placed in an ACC gear from the OFF gear, controlling the power battery to be electrified based on the state of external input energy; when the main switch state of the power supply is ON and the key state of the ignition lock is set from an ACC gear to an ON gear, controlling the BSG to be electrified based ON the running state of the MCU, the electrifying state of the power battery and the rotating speed of the BSG motor; the power-off control module is used for acquiring the main switch state of a vehicle power supply and the key state of an ignition lock in the power-off step; when the main switch of the power supply is turned on and the key of the ignition lock is switched from an ACC gear to an OFF gear, the BSG is controlled to be powered OFF; the power supply main switch state is switched from on to off, and the power battery is controlled to be directly powered off or to be powered off in a delayed mode based on the working state of the electric accessory.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

Claims (10)

1. A48V power-on and power-off control method for vehicle multi-energy management is characterized by comprising a power-on step and a power-off step, wherein the power-on step specifically comprises the following steps:
acquiring a main switch state and an ignition lock key state of a vehicle power supply;
when the main switch state of the power supply is on, and the key state of the ignition lock is an OFF gear or is placed in an ACC gear from the OFF gear, controlling the power battery to be electrified based on the state of external input energy;
when the main switch state of the power supply is ON and the key state of the ignition lock is set from an ACC gear to an ON gear, controlling the BSG to be electrified based ON the running state of the MCU, the electrifying state of the power battery and the rotating speed of the BSG motor;
the powering down step comprises:
acquiring a main switch state and an ignition lock key state of a vehicle power supply;
when the main switch of the power supply is turned on and the key of the ignition lock is switched from an ACC gear to an OFF gear, the BSG is controlled to be powered OFF;
the power supply main switch state is switched from on to off, and the power battery is controlled to be directly powered off or to be powered off in a delayed mode based on the working state of the electrical appliance accessories.
2. The vehicle multi-energy management 48V power-on and power-off control method according to claim 1, wherein the power-on step further comprises:
when the main switch state of the power supply is OFF and the key state of the ignition lock is an OFF gear, the PCU, the BMS and the MCU are all in a non-working state;
when the main power switch state is on and the ignition lock key state is OFF, the PCU, the BMS, and the MCU are all activated.
3. The vehicle multi-energy management 48V power-on and power-OFF control method according to claim 2, wherein when the power main switch state is on, and the ignition lock key state is OFF or is switched from OFF to ACC, the power battery is controlled to be powered on based on the state of external input energy, and the method specifically comprises the following steps:
when the main power switch state is on and the ignition lock key state is OFF, if the input voltage of the solar battery is not less than a preset value and the SOC of the power battery is not more than a set value, the PCU sends an electric signal on the power battery to the BMS, the BMS controls the power battery to be powered on, otherwise, the PCU does not send the electric signal on the power battery to the BMS;
when the main switch state of the power supply is on and the key state of the ignition lock is in an ACC gear from an OFF gear, if the input voltage of the solar battery is not less than a preset value and the SOC of the power battery is not more than a set value, the PCU sends an electric signal on the power battery to the BMS, the BMS controls the power battery to be powered on, and otherwise, the PCU does not send the electric signal on the power battery to the BMS.
4. The vehicle multi-energy management 48V power-on and power-off control method according to claim 3, wherein the BSG power-on is controlled based on the running state of the MCU, the power battery power-on state and the BSG motor speed, and specifically comprises:
and when the running state of the MCU is a to-be-run state or a post-run ending state and the actual rotating speed of the BSG motor is less than the preset rotating speed, controlling the BSG to be powered on based on the power battery power-on state.
5. The vehicle multi-energy management 48V power-on and power-off control method according to claim 4, characterized in that: the to-be-run state is that the BSG has not run in one power-up cycle of the main switch of the power supply.
6. The vehicle multi-energy management 48V power-on and power-off control method according to claim 4, characterized in that: the post-run end state is that the BSG has run in one power-up cycle of the main power switch.
7. The vehicle multi-energy management 48V power-on and power-off control method according to claim 4, wherein the BSG power-on is controlled based on the power battery power-on state, specifically:
if the power-on relay of the power battery is in a closed state, the PCU controls the working electric appliance accessories to be closed, the power-on relay of the power battery is disconnected, the MCU controls the BSG to be powered on, and then the PCU controls the power-on relay of the power battery to be closed;
if the power-on relay of the power battery is in an off state, the MCU controls the BSG to be powered on, and then the PCU controls the power-on relay of the power battery to be switched on.
8. The vehicle multi-energy management 48V power-on and power-off control method of claim 1, after controlling the BSG to power off, further comprising:
and the PCU monitors the working state of the electric equipment accessories, if all the electric equipment accessories are in the working stop state, the PCU controls the power-on relay of the power battery to be disconnected, otherwise, the power-on relay of the power battery is kept in the closed state.
9. The vehicle multi-energy management 48V power-on and power-off control method according to claim 8, wherein the power supply main switch state is switched from on to off, and the power battery is controlled to be directly powered off or to be powered off in a delayed manner based on the working state of the electrical accessories, and specifically comprises the following steps:
when the power main switch state is switched from on to off, the MCU stops working, and the PCU judges the working state of the electric appliance accessories:
if all the electric appliance accessories are in the work stop state, the BMS and the PCU enter the sleep state;
if the electrical accessories in the working state exist, the PCU controls the electrical accessories in the working state to be turned off, then controls the power-on relay of the power battery to be turned off, and then the BMS and the PCU enter a sleep state.
10. The utility model provides a whole car multi-energy management 48V power on-off control system which characterized in that includes:
the power-on control module is used for acquiring the main switch state of the vehicle power supply and the key state of the ignition lock in the power-on step; when the main switch state of the power supply is on, and the key state of the ignition lock is an OFF gear or is placed in an ACC gear from the OFF gear, controlling the power battery to be electrified based on the state of external input energy; when the main switch state of the power supply is ON and the key state of the ignition lock is set from an ACC gear to an ON gear, controlling the BSG to be electrified based ON the running state of the MCU, the electrifying state of the power battery and the rotating speed of the BSG motor;
the power-off control module is used for acquiring the main switch state of the vehicle power supply and the key state of an ignition lock in the power-off step; when the main switch of the power supply is turned on and the key of the ignition lock is switched from an ACC gear to an OFF gear, the BSG is controlled to be powered OFF; the power supply main switch state is switched from on to off, and the power battery is controlled to be directly powered off or to be powered off in a delayed mode based on the working state of the electrical appliance accessories.
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