CN116691437A - Battery compensation control method and device for electric vehicle during dormancy - Google Patents
Battery compensation control method and device for electric vehicle during dormancy Download PDFInfo
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- CN116691437A CN116691437A CN202310625141.1A CN202310625141A CN116691437A CN 116691437 A CN116691437 A CN 116691437A CN 202310625141 A CN202310625141 A CN 202310625141A CN 116691437 A CN116691437 A CN 116691437A
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- 238000000034 method Methods 0.000 title claims abstract description 51
- 230000005059 dormancy Effects 0.000 title claims abstract description 17
- 230000001502 supplementing effect Effects 0.000 claims abstract description 29
- 230000005611 electricity Effects 0.000 claims abstract description 16
- 239000013589 supplement Substances 0.000 claims abstract description 14
- 230000008569 process Effects 0.000 claims abstract description 11
- 230000007958 sleep Effects 0.000 claims description 17
- 238000004891 communication Methods 0.000 claims description 15
- 238000004590 computer program Methods 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 5
- 238000012423 maintenance Methods 0.000 claims description 4
- 230000001360 synchronised effect Effects 0.000 claims description 4
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 claims 13
- 230000007774 longterm Effects 0.000 abstract description 6
- 238000012545 processing Methods 0.000 abstract description 3
- 230000002618 waking effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/342—The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/80—Time limits
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention relates to the technical field of batteries of electric vehicles, in particular to a method and a device for supplementing electricity to a storage battery during dormancy of an electric vehicle. The invention provides an automatic power supply strategy for the vehicle under the working condition of long-term standing, ensures that the vehicle can reliably and effectively supply power under the working condition of long-term standing, and ensures the reliable supply of the electric quantity of the storage battery; under the condition of no fault, the power supply requirement of the vehicle is ensured; the PCU is used for waking up the associated controller by using the mode of automatic starting of the PCU or a system clock, and entering a set intelligent electricity supplementing process to automatically supplement electricity to the vehicle in a dormant state, so that the storage battery can timely supplement energy when the vehicle is not used for a long time; the intelligent power supply system establishes a fault processing strategy of an intelligent power supply function, is safer and more reliable, and can effectively ensure that an intelligent power supply program is started on the premise of safety and no faults of the whole vehicle.
Description
Technical Field
The invention relates to the technical field of batteries of electric vehicles, in particular to a method and a device for supplementing electricity to a storage battery during dormancy of an electric vehicle.
Background
With the improvement of life of people and the tremendous change of travel life and transportation means, the national energy strategy propulsion is increasingly advanced to the electric intelligent networking, the market penetration of pure electric new energy vehicles is in an increasing trend in recent years, and new energy vehicles are gradually popularized to various families in a future period of time.
Compared with the traditional fuel oil vehicle, the pure electric new energy vehicle has the advantages that the intelligent function and an electric system required for meeting the intelligent function are more complex, and the stability requirement on a low-voltage storage battery system is higher. Because the existence of quiescent current of the electric device can lead to the vehicle to gradually consume the electric quantity of the storage battery under the condition of long-time placement, if the intelligent power supplementing function of the storage battery is not available, the vehicle stands for a long time, the vehicle is in a dormant state, the existence of quiescent current causes feeding of a low-voltage storage battery system, the vehicle cannot be normally started when the vehicle gets on the vehicle next time, and the low-voltage storage battery system can be damaged under the condition that the deep discharge of the storage battery cannot be timely supplemented.
In view of the foregoing, a new electric vehicle power supply strategy is needed.
Disclosure of Invention
The invention provides a method and a device for compensating power of a storage battery during dormancy of an electric vehicle, which are used for realizing the purposes of monitoring the electric quantity of the storage battery in real time and compensating power of the storage battery under the condition of long-time placement of the vehicle, preventing the storage battery from standing for a long time to feed, and ensuring that the next vehicle can be started normally.
In a first aspect, the present invention provides a method for battery power compensation control during sleep of an electric vehicle, the method comprising:
after the electric vehicle is powered down, a clock timing wake-up power domain controller PCU (power control unit, power domain controller, abbreviated as PCU) is arranged;
after the PCU wakes up, a wake-up frame is sent to a storage battery controller in a vehicle network, the storage battery controller monitors the state of the storage battery, and when the voltage of the storage battery is detected to be smaller than or equal to a set threshold U1, the PCU wakes up an associated system controller to perform self-checking;
and after the self-checking is passed, the PCU sends a command to open a high-voltage loop of the DC converter DCDC to supplement power for the storage battery.
Further, setting the clock timing wake-up power domain controller PCU includes:
the power domain controller PCU is awakened every time T1 by the built-in clock of the power domain controller PCU or by using the clock of the whole vehicle system.
Further, the PCU wakes up the associated system controller to perform self-checking, including:
the PCU wakes up the battery management system BMS, the DC converter DCDC and the controller PDU associated system controller for controlling the power distribution relay in the distribution box to be attracted and disconnected, synchronously detects each controller of the power system to see whether a whole vehicle level or system level fault exists, if no fault exists, the self-checking is passed, and otherwise, a fault alarm is sent.
Further, the PCU sends a command to open the high-voltage loop of the DCDC to perform battery recharging, including:
the PCU issues a high-voltage relay actuation instruction to the PDU, a high-voltage loop of the DCDC is opened, a high-voltage state is fed back after high voltage on the DCDC system is finished, and the DCDC system is synchronized to start to supplement electric power to the low-voltage storage battery system.
Further, the method further comprises: when the voltage value of the storage battery fed back by the storage battery controller is larger than or equal to a threshold value U2, the PCU firstly issues a power-down instruction to a BMS (Battery management system, a battery management system, BMS for short) and DCDC, the power-up action of the DCDC to the storage battery is stopped, the state is fed back after the DCDC stops working, and then the DCDC loop relay is disconnected by PDU.
Further, the method further comprises: the PCU wakes up after a certain period T2, detects the state of the storage battery, and judges whether to restart the power supply flow;
after the battery controller feeds back the battery state OK, the PCU issues a power-down sleep command to each controller, and PCU, DCDC, BMS, PDU (power distribution unit, PDU for short) and the battery controller sequentially reenters the sleep state.
Further, the method further comprises: in the power supplementing process, PCU, DCDC, BMS, PDU and a storage battery controller feed back the state of the storage battery in real time, if the whole vehicle and the fault affecting the safety of the whole vehicle are found, the power supplementing process of the storage battery is immediately interrupted, the PCU issues a command of disconnecting the high-voltage relay to the PDU, the PCU sends a command of disconnecting the maintenance switch to the BMS, the power battery is stopped from outputting to the outside, and the whole vehicle enters a fault protection state.
The invention provides a storage battery power supplementing control device for an electric vehicle during dormancy, which comprises a wake-up unit, a self-checking unit and a power supplementing unit;
the wake-up unit is used for setting a clock timing wake-up power domain controller PCU after the electric vehicle is powered down;
the self-checking unit is used for sending a wake-up frame to the storage battery controller in the vehicle network after the PCU is waken up, the storage battery controller monitors the state of the storage battery, and when the voltage of the storage battery is detected to be smaller than or equal to a set threshold U1, the PCU wakens up the related system controller to perform self-checking;
and the power supplementing unit is used for conducting battery power supplementing by sending a command to open a high-voltage loop of the DCDC through the PCU after the self-checking is passed.
In a third aspect, the present invention provides an electronic device, including a processor, a communication interface, a memory, and a communication bus, where the processor, the communication interface, and the memory complete communication with each other through the communication bus;
a memory for storing a computer program;
and the processor is used for realizing the storage battery power compensation control method during the dormancy of the electric vehicle when executing the program stored in the memory.
In a fourth aspect, the present invention provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements a method for battery replenishment control in the sleep mode of an electric vehicle as described above.
The computer-readable storage medium may be embodied in the apparatus/means described in the above embodiments; or may exist alone without being assembled into the apparatus/device. The computer-readable storage medium carries one or more programs which, when executed, implement methods in accordance with embodiments of the present disclosure.
According to embodiments of the present disclosure, the computer-readable storage medium may be a non-volatile computer-readable storage medium, which may include, for example, but is not limited to: a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the context of this disclosure, a computer-readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
The invention has at least the following beneficial effects:
the invention provides an automatic power supply strategy for the vehicle under the working condition of long-term standing, ensures that the vehicle can reliably and effectively supply power under the working condition of long-term standing, and ensures the reliable supply of the electric quantity of the storage battery; under the condition of no fault, the power supply requirement of the vehicle is ensured; the PCU is used for waking up the associated controller by using the mode of automatic starting of the PCU or a system clock, and entering a set intelligent electricity supplementing process to automatically supplement electricity to the vehicle in a dormant state, so that the storage battery can timely supplement energy when the vehicle is not used for a long time; the intelligent power supply system establishes a fault processing strategy of an intelligent power supply function, is safer and more reliable, and can effectively ensure that an intelligent power supply program is started on the premise of safety and no faults of the whole vehicle.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a power supply method according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a power supply device according to an embodiment of the present invention;
fig. 3 is a schematic block diagram.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the prior art, when a vehicle is placed for a long time, the vehicle is in a dormant state, the storage battery is depleted of electric energy due to the existence of static current, the storage battery can not be timely replenished after deep discharging, the capacity of the storage battery can be damaged, and the vehicle can not be successfully started in a storage battery feeding state.
The invention provides a method and a device for compensating electric power of a storage battery during sleep of an electric vehicle, and the method and the device comprise the method for compensating electric power of the storage battery during sleep of the electric vehicle, the device for compensating electric power of the storage battery during sleep of the electric vehicle, electronic equipment and a computer readable storage medium.
When the vehicle is in a dormant state, the invention completes detection of the electric quantity state of the storage battery and completes electricity supplementing of the storage battery when the storage battery feeds through a series of monitoring, detecting, calculating, controlling and executing steps. The vehicle is guaranteed to be placed for a long time, electricity can be reliably and effectively supplemented in a dormant state, deep discharge protection of the storage battery is completed, and reliability of the vehicle is guaranteed when the vehicle is used again. And the electric quantity and the state of the storage battery are monitored in real time, the electricity is timely supplemented, and the circuit supplementing path is optimized.
As shown in fig. 1, the invention provides a battery compensation control method during sleep of an electric vehicle, which comprises the following steps:
after the electric vehicle is powered down, a clock timing wake-up power domain controller PCU is arranged;
after the PCU wakes up, a wake-up frame is sent to a storage battery controller in a vehicle network, the storage battery controller monitors the state of the storage battery, and when the voltage of the storage battery is detected to be smaller than or equal to a set threshold U1, the PCU wakes up an associated system controller to perform self-checking;
and after the self-checking is passed, the PCU sends a command to open a high-voltage loop of the DC converter DCDC to supplement power for the storage battery.
When the vehicle is placed for a long time, each electric device is in a silent and dormant state, the storage battery is provided with a controller, the controller is used for monitoring the state of the storage battery, when the feeding or poor state of the storage battery is found, a power supplementing request is sent to a high-voltage system, the high-voltage system responds to the requirement, and a power supplementing line is connected to complete the power supplementing of the storage battery.
In this embodiment, the clock timing wake-up power domain controller PCU is set, including:
the power domain controller PCU is awakened every time T1 by the built-in clock of the power domain controller PCU or by using the clock of the whole vehicle system.
In specific implementation, T1 is set according to the actual battery condition.
In this embodiment, the PCU wakes up the associated system controller to perform self-checking, including:
the PCU wakes up the battery management system BMS, the DC converter DCDC and the controller PDU associated system controller for controlling the power distribution relay in the distribution box to be attracted and disconnected, synchronously detects each controller of the power system to see whether a whole vehicle level or system level fault exists, if no fault exists, the self-checking is passed, and otherwise, a fault alarm is sent.
In this embodiment, the PCU sends a command to open the high-voltage loop of DCDC to perform battery recharging, including:
the PCU issues a high-voltage relay actuation instruction to the PDU, a high-voltage loop of the DCDC is opened, a high-voltage state is fed back after high voltage on the DCDC system is finished, and the DCDC system is synchronized to start to supplement electric power to the low-voltage storage battery system.
In this embodiment, the method further includes: when the voltage value of the storage battery fed back by the storage battery controller is larger than or equal to a threshold value U2, the PCU firstly issues a power-down instruction to the BMS and the DCDC, the power-up action of the DCDC to the storage battery is stopped, the state is fed back after the DCDC stops working, and then the DCDC loop relay is disconnected by the PDU.
In this embodiment, the method further includes: the PCU wakes up after a certain period T2, detects the state of the storage battery, and judges whether to restart the power supply flow;
after the storage battery controller feeds back the storage battery state OK, the PCU issues a power-down dormancy instruction to each controller, and PCU, DCDC, BMS, PDU and the storage battery controller sequentially reenter the dormancy state.
In specific implementation, T2 is set according to the actual battery condition.
In this embodiment, the method further includes: in the power supplementing process, PCU, DCDC, BMS, PDU and a storage battery controller feed back the state of the storage battery controller in real time, if the whole vehicle and the fault affecting the safety of the whole vehicle are found, the power supplementing process of the storage battery is immediately interrupted, the PCU issues a command of disconnecting the high-voltage relay to the PDU, the PCU sends a command of disconnecting the maintenance switch to the BMS, the power battery is stopped from outputting to the outside, and the whole vehicle enters a fault protection state.
As shown in FIG 2, the invention provides a storage battery electricity supplementing control device for an electric vehicle during dormancy, which comprises a wake-up unit, a self-checking unit and an electricity supplementing unit;
the wake-up unit is used for setting a clock timing wake-up power domain controller PCU after the electric vehicle is powered down;
the self-checking unit is used for sending a wake-up frame to the storage battery controller in the vehicle network after the PCU is waken up, the storage battery controller monitors the state of the storage battery, and when the voltage of the storage battery is detected to be smaller than or equal to a set threshold U1, the PCU wakens up the related system controller to perform self-checking;
and the power supplementing unit is used for conducting battery power supplementing by sending a command to open a high-voltage loop of the DCDC through the PCU after the self-checking is passed.
In specific implementation, the implementation processes of the storage battery compensation control device and the storage battery compensation control method for the electric vehicle during dormancy are in one-to-one correspondence and are not described herein.
The invention provides electronic equipment, which comprises a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory are communicated with each other through the communication bus;
a memory for storing a computer program;
and the processor is used for realizing the storage battery power compensation control method during the dormancy of the electric vehicle when executing the program stored in the memory.
The invention provides a computer readable storage medium, on which a computer program is stored, which when being executed by a processor, implements the above-mentioned method for battery power compensation control when an electric vehicle is in sleep.
In order for those skilled in the art to better understand the present invention, the principles of the present invention are described below with reference to the accompanying drawings:
the invention aims to solve the problem of feeding a storage battery under long-time standing of a vehicle, and provides an intelligent power compensation control method for an electric automobile, which is used for realizing intelligent power compensation of the storage battery under long-time standing working conditions.
The invention provides a working condition: the working condition of the vehicle is that the vehicle is placed for a long time.
The invention also provides a schematic block diagram of intelligent power supply of the storage battery under the proposed working condition, and the detailed control method is described as follows:
and describing working conditions, namely gradually entering a dormant state by each system controller of the vehicle according to a set dormant strategy after the vehicle is powered down. In the next long period, the driver does not have the vehicle demand, and the vehicle is in a state of standing for a long period.
The schematic block diagram is shown in fig. 3, the PCU is connected with the battery controller, DCDC, BMS, PDU and the MCU through the communication lines respectively, the battery and the dc converter are connected through the low voltage line, the dc converter and the distribution box are connected through the high voltage line, the power battery and the distribution box are connected through the high voltage line, the distribution box and the motor are connected through the high voltage line, and the components are described as follows:
1. the system comprises a storage battery and a storage battery controller, wherein the storage battery is a 12V low-voltage power supply battery of a vehicle, and the storage battery controller is a controller for monitoring the state of the storage battery.
2. DCDC (direct current converter) is used to control an intermediate converter that converts the high voltage power of a power cell into low voltage to recharge a battery. The power supply voltage of the 12V storage battery is 14V, and the output voltage can be selected according to the actual selected storage battery parameter requirement.
3. The power battery is connected to the block terminal, and the power battery is connected to the block terminal that is responsible for next level high voltage electricity distribution's electrical apparatus box, PDU promptly control the inside distribution relay actuation of block terminal disconnection's controller.
4. The motor receives high-voltage power of the power battery and outputs torque to the whole vehicle. The MCU is a motor core controller.
5. The power battery and the BMS are devices for providing high-voltage power and storing energy for the whole vehicle. The BMS is used for managing the power battery to output outwards, receiving external power and managing the controllers of all modules (single battery cells, modules, consistency and the like) of the battery.
6. The power domain controller (PCU) is responsible for controlling, inputting, outputting and deciding actions of all power systems so as to achieve an optimal control strategy and an optimal realization path and optimize all consumption of the whole vehicle power system.
The controllers mentioned above are connected by communication lines to effect signal transmission. Each high-voltage part is connected through a high-voltage line, and the high-voltage relay is integrated in the distribution box and controlled by the PDU.
The proposed control method based on the above-mentioned schematic block diagram is described as follows:
after the vehicle is powered down, a clock is built in a power domain controller (PCU) or a whole vehicle system clock is utilized, the PCU is awakened at fixed time, an awakening frame is sent to a storage battery controller in a network after the PCU is awakened, the storage battery controller monitors the state of the storage battery, when the storage battery voltage is detected to be smaller than or equal to a set threshold U1, the PCU is awakened to BMS, DCDC, PDU and other related system controllers, the PCU synchronously detects whether each controller of the power system has a whole vehicle level or system level fault or not, if no fault exists, the PCU issues a high-voltage relay actuation instruction to a PDU, a high-voltage loop of a DCDC is opened, the high-voltage state is fed back after the high-voltage on the DCDC system is completed, and the synchronous DCDC system starts to supplement electric power to a low-voltage storage battery system. When the voltage value of the storage battery fed back by the storage battery controller is larger than or equal to a threshold value U2, the PCU firstly issues a power-down instruction to the BMS and the DCDC, the power-up action of the DCDC to the storage battery is stopped, the state is fed back after the DCDC stops working, and then the PDU turns off the DCDC loop relay to finish the power-up of the storage battery; in the following time, the PCU wakes up after a certain period T2, detects the state of the storage battery, and judges whether to start an intelligent power supply flow. After the storage battery controller feeds back the storage battery state OK, the PCU issues a power-down dormancy instruction to each controller, and PCU, DCDC, BMS, PDU and the storage battery controller sequentially reenter the dormancy state.
In the process, each controller feeds back the state of the controller at any time, once the whole vehicle and the fault affecting the safety of the whole vehicle are found, the intelligent power supply flow of the storage battery is immediately interrupted, the PCU issues a command for opening the high-voltage relay to the PDU, the PCU sends a command for opening the maintenance switch to the BMS, the power battery is cut off to output the power battery outwards, and the whole vehicle enters a fault protection state so as to protect the safety of the whole vehicle.
The invention has the advantages that: an automatic power supply strategy is provided for a vehicle under the working condition of long-term standing, so that the vehicle can reliably and effectively supply power under the working condition of long-term standing, and the reliable supply of the electric quantity of the storage battery is ensured; under the condition of no fault, the power supply requirement of the vehicle is ensured; the PCU is used for waking up the associated controller by using the mode of automatic starting of the PCU or a system clock, and entering a set intelligent electricity supplementing process to automatically supplement electricity to the vehicle in a dormant state, so that the storage battery can timely supplement energy when the vehicle is not used for a long time; the intelligent power supply system establishes a fault processing strategy of an intelligent power supply function, is safer and more reliable, and can effectively ensure that an intelligent power supply program is started on the premise of safety and no faults of the whole vehicle.
Although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The method for controlling the battery recharging during the dormancy of the electric vehicle is characterized by comprising the following steps:
after the electric vehicle is powered down, a clock timing wake-up power domain controller PCU is arranged;
after the PCU wakes up, a wake-up frame is sent to a storage battery controller in a vehicle network, the storage battery controller monitors the state of the storage battery, and when the voltage of the storage battery is detected to be smaller than or equal to a set threshold U1, the PCU wakes up an associated system controller to perform self-checking;
and after the self-checking is passed, the PCU sends a command to open a high-voltage loop of the DC converter DCDC to supplement power for the storage battery.
2. The method for battery power compensation control during sleep of an electric vehicle according to claim 1, wherein,
setting a clock timing wake-up power domain controller PCU, comprising:
the power domain controller PCU is awakened every time T1 by the built-in clock of the power domain controller PCU or by using the clock of the whole vehicle system.
3. The method for battery power compensation control during sleep of an electric vehicle according to claim 1, wherein,
the PCU wakes up the associated system controller to perform self-checking, comprising:
the PCU wakes up the battery management system BMS, the DC converter DCDC and the controller PDU associated system controller for controlling the power distribution relay in the distribution box to be attracted and disconnected, synchronously detects each controller of the power system to see whether a whole vehicle level or system level fault exists, if no fault exists, the self-checking is passed, and otherwise, a fault alarm is sent.
4. The method for battery power compensation control during sleep of an electric vehicle according to claim 1, wherein,
the PCU sends a command to open a high-voltage loop of the DCDC to supplement power for the storage battery, and the method comprises the following steps:
the PCU issues a high-voltage relay actuation instruction to the PDU, a high-voltage loop of the DCDC is opened, a high-voltage state is fed back after high voltage on the DCDC system is finished, and the DCDC system is synchronized to start to supplement electric power to the low-voltage storage battery system.
5. The method for battery power compensation control during sleep of an electric vehicle according to claim 1, wherein,
the method further comprises the steps of: when the voltage value of the storage battery fed back by the storage battery controller is larger than or equal to a threshold value U2, the PCU firstly issues a power-down instruction to the BMS and the DCDC, the power-up action of the DCDC to the storage battery is stopped, the state is fed back after the DCDC stops working, and then the DCDC loop relay is disconnected by the PDU.
6. The method for battery power compensation control during sleep of an electric vehicle according to claim 1, wherein,
the method further comprises the steps of: the PCU wakes up after a certain period T2, detects the state of the storage battery, and judges whether to restart the power supply flow;
after the battery controller feeds back the battery state OK, the PCU issues a power-down sleep instruction to each controller, and PCU, DCDC, BMS, PDU and the battery controller reenter the sleep state in sequence.
7. The method for battery power control during sleep of an electric vehicle according to any one of claims 1 to 6, characterized in that,
the method further comprises the steps of: in the power supplementing process, PCU, DCDC, BMS, PDU and a storage battery controller feed back the state of the storage battery in real time, if the whole vehicle and the fault affecting the safety of the whole vehicle are found, the power supplementing process of the storage battery is immediately interrupted, the PCU issues a command of disconnecting the high-voltage relay to the PDU, the PCU sends a command of disconnecting the maintenance switch to the BMS, the power battery is stopped from outputting to the outside, and the whole vehicle enters a fault protection state.
8. The storage battery electricity supplementing control device for the electric vehicle during dormancy is characterized by comprising a wake-up unit, a self-checking unit and an electricity supplementing unit;
the wake-up unit is used for setting a clock timing wake-up power domain controller PCU after the electric vehicle is powered down;
the self-checking unit is used for sending a wake-up frame to the storage battery controller in the vehicle network after the PCU is waken up, the storage battery controller monitors the state of the storage battery, and when the voltage of the storage battery is detected to be smaller than or equal to a set threshold U1, the PCU wakens up the related system controller to perform self-checking;
and the power supplementing unit is used for conducting battery power supplementing by sending a command to open a high-voltage loop of the DCDC through the PCU after the self-checking is passed.
9. The electronic equipment is characterized by comprising a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory are communicated with each other through the communication bus;
a memory for storing a computer program;
a processor for implementing a method for battery recharging control when an electric vehicle is dormant, according to any one of claims 1 to 7, when executing a program stored in a memory.
10. A computer readable storage medium having stored thereon a computer program, wherein the computer program when executed by a processor implements a method for battery replenishment control in the dormancy of an electric vehicle according to any one of claims 1 to 7.
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| CN202310625141.1A CN116691437A (en) | 2023-05-29 | 2023-05-29 | Battery compensation control method and device for electric vehicle during dormancy |
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| CN202310625141.1A CN116691437A (en) | 2023-05-29 | 2023-05-29 | Battery compensation control method and device for electric vehicle during dormancy |
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