CN117103993A - Vehicle energy management method and device, storage medium and vehicle - Google Patents

Vehicle energy management method and device, storage medium and vehicle Download PDF

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Publication number
CN117103993A
CN117103993A CN202311279625.1A CN202311279625A CN117103993A CN 117103993 A CN117103993 A CN 117103993A CN 202311279625 A CN202311279625 A CN 202311279625A CN 117103993 A CN117103993 A CN 117103993A
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China
Prior art keywords
voltage
vehicle
storage battery
low
controlling
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CN202311279625.1A
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Chinese (zh)
Inventor
张星烁
李威
姜涛
姜磊
盛毅
陈德松
孟凡琪
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FAW Group Corp
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FAW Group Corp
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Priority to CN202311279625.1A priority Critical patent/CN117103993A/en
Publication of CN117103993A publication Critical patent/CN117103993A/en
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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
    • B60L1/00—Supplying electric power to auxiliary equipment of vehicles
    • 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
    • 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)

Abstract

The application discloses a vehicle energy management method, a vehicle energy management device, a storage medium and a vehicle. Wherein the method comprises the following steps: acquiring state information of a storage battery and load information of a vehicle, wherein the state information comprises at least one of the following: the temperature of the storage battery and the voltage of the storage battery, and the load information comprises low-voltage load power consumption of the vehicle; a target strategy set is generated based on the state information and the load information, the target strategy set being used for controlling at least one of an output current value of a DCDC converter and a storage battery of the vehicle to meet low-voltage load power consumption, and for controlling the DCDC converter to perform a charging task or a power-off task on the storage battery. The application solves the technical problem of large vehicle energy loss caused by unreasonable energy management method of the pressure energy source.

Description

Vehicle energy management method and device, storage medium and vehicle
Technical Field
The application relates to the technical field of vehicle energy management method design, in particular to a vehicle energy management method, a device, a storage medium and a vehicle.
Background
The current method for supplying low-voltage energy on the electric automobile comprises the following steps: the high voltage power provided by the power cells is typically converted by DCDC to low voltage power for the low voltage system, powering the low voltage battery and low voltage loads. The control method for the DCDC output power is to feed back the charging voltage required by the current storage battery to the DCDC through the low-voltage energy management system, and the storage battery is in a charging or standby working state in the process, so that part of energy is wasted. And the conversion efficiency of the DCDC is different under the condition of bearing different loads, and the DCDC energy conversion efficiency is lower under the condition of overhigh or overlow load, so that energy waste is caused.
In view of the above problems, no effective solution has been proposed at present.
Disclosure of Invention
The embodiment of the application provides a vehicle energy management method, a device, a storage medium and a vehicle, which are used for at least solving the technical problem of large vehicle energy loss caused by unreasonable low-voltage energy management method.
According to one aspect of an embodiment of the present application, there is provided a method of vehicle energy management, comprising: acquiring state information of a storage battery and load information of a vehicle, wherein the state information comprises at least one of the following: the temperature of the storage battery and the voltage of the storage battery, and the load information comprises low-voltage load power consumption of the vehicle; a target strategy set is generated based on the state information and the load information, the target strategy set being used for controlling at least one of an output current value of a DCDC converter and a storage battery of the vehicle to meet low-voltage load power consumption, and for controlling the DCDC converter to perform a charging task or a power-off task on the storage battery.
Optionally, generating the target policy set based on the state information and the load information includes: judging whether the temperature of the storage battery is greater than a preset safety threshold value or not; if so, generating a first target control instruction and a second target control instruction in the target strategy set, wherein the first target control instruction is used for controlling the DCDC converter to output a first current value so as to meet all low-voltage load power consumption, and the second target control instruction is used for controlling the DCDC converter to execute a power-off task on the storage battery.
Optionally, generating the target policy set based on the state information and the load information further includes: under the condition that the temperature is not larger than a safety threshold value, judging whether the voltage is larger than a preset safety voltage value or not: if so, generating a first target control instruction and a third target control instruction in the target strategy set, wherein the third target control instruction is used for controlling the DCDC converter to execute a charging task on the storage battery.
Optionally, generating the target policy set based on the state information and the load information further includes: under the condition that the voltage is not larger than the safety voltage value, judging whether the power consumption of the low-voltage load is larger than the optimal power value output by the DCDC converter or not; if so, generating a fourth target control instruction in the target strategy set, wherein the fourth target control instruction is used for controlling the DCDC converter to output current at the optimal power value to meet the low-voltage load power consumption of one part, and controlling the storage battery to output a second current value to meet the low-voltage load power consumption of the other part, and the second current value is determined by the optimal power value and the low-voltage load power consumption.
Optionally, generating the target policy set based on the state information and the load information further includes: and generating a first target control instruction and a third target control instruction under the condition that the low-voltage load power consumption is not larger than the optimal power value.
Optionally, the DCDC converter is electrically connected with the storage battery through a low-voltage relay, the DCDC converter is controlled to perform a charging task on the storage battery, the low-voltage relay is combined, and the DCDC converter is controlled to perform a power-off task on the storage battery, the low-voltage relay is disconnected.
According to another aspect of an embodiment of the present application, there is also provided an apparatus for vehicle energy management, including: the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring state information of a storage battery and load information of a vehicle, and the state information comprises at least one of the following components: the temperature of the storage battery and the voltage of the storage battery, and the load information comprises low-voltage load power consumption of the vehicle; the system comprises a generating module, a control module and a power-off module, wherein the generating module is used for generating a target strategy set based on state information and load information, wherein the target strategy set is used for controlling at least one of a DCDC converter and a storage battery of a vehicle to output current values so as to meet low-voltage load power consumption, and is used for controlling the DCDC converter to execute a charging task or a power-off task on the storage battery.
According to a further aspect of embodiments of the present application, there is also provided a computer readable storage medium having a computer program stored therein, wherein the computer program is arranged to perform the above-described method when run.
According to yet another aspect of an embodiment of the present application, there is also provided a processor for running a program, wherein the program is configured to perform the above-mentioned method when run.
According to a further aspect of embodiments of the present application there is also provided a vehicle comprising a memory, a processor, the memory having stored therein a computer program, the processor being arranged to run the computer program to perform the method as described above.
In the embodiment of the application, a mode of acquiring the state information of the storage battery and the load information of the vehicle is adopted, and a target strategy set is generated based on the state information and the load information, so that the aim of comprehensively considering the state of the storage battery and the actual low-voltage load condition of the vehicle to control the output of the DCDC converter and the storage battery is fulfilled, the technical effects of improving the DCDC energy conversion efficiency and preventing the energy loss are realized, and the technical problem of high energy loss of the vehicle caused by unreasonable low-voltage energy management method is solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:
FIG. 1 is a block diagram of the hardware architecture of a computer terminal of a method of vehicle energy management according to an alternative embodiment of the present application;
FIG. 2 is a flow chart of a method of vehicle energy management according to an alternative embodiment of the present application;
FIG. 3 is a block schematic diagram of a vehicle energy management unit according to an alternative embodiment of the application;
FIG. 4 is a flow chart diagram of a method of vehicle energy management according to an alternative embodiment of the present application;
fig. 5 is a block diagram of an apparatus for vehicle energy management in accordance with an alternative embodiment of the present application.
Detailed Description
In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present application without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The new energy vehicle refers to a vehicle using new energy as driving energy, and mainly includes a pure electric vehicle, a plug-in hybrid vehicle and a fuel cell vehicle.
An electric-only vehicle is a vehicle that is driven entirely by electric energy, which uses a battery pack to store electric energy, and converts the electric energy into mechanical energy by an electric motor to drive the vehicle. The pure electric vehicle has no emission, no tail gas pollution, zero emission, low noise, high efficiency and the like, and is environment-friendly.
The plug-in hybrid vehicle is a vehicle that can be driven by fuel oil or electric energy stored in a battery. The plug-in hybrid electric vehicle can be charged through plug-in, the charging time is short, and the plug-in hybrid electric vehicle can also be charged through power generation of the fuel engine. The vehicle not only has the long endurance of the fuel vehicle, but also has the zero emission advantage of the pure electric vehicle, and is a transitional new energy vehicle.
A fuel cell vehicle refers to a vehicle that uses hydrogen and oxygen to chemically react in a fuel cell to generate electric power to drive the vehicle. The fuel cell vehicle only generates water vapor, has zero emission and is environment-friendly. The fuel cell vehicle has the advantages of high energy density, long endurance mileage and the like, but the current shortage of hydrogen supply and higher cost are the limiting factors for the development of the fuel cell vehicle.
The new energy vehicle has important significance in pushing environmental protection, reducing tail gas pollution, reducing energy consumption and the like. With the continuous progress of technology and the support of policies, the market share of new energy vehicles is gradually increased, and a more environment-friendly and sustainable trip mode is provided for people.
However, the popularization of new energy vehicles is limited by the range of the new energy vehicles, so that the improvement on the energy efficiency and the energy management of the new energy vehicles is urgently needed, and the overall energy loss is reduced. The low-voltage energy management method of the vehicle in the prior art has the defect of low conversion efficiency.
In accordance with one embodiment of the present application, there is provided an embodiment of a method of vehicle energy management, it being noted that the steps illustrated in the flowchart of the figures may be performed in a computer system, such as a set of computer executable instructions, and that although a logical sequence is illustrated in the flowchart, in some cases the steps illustrated or described may be performed in a different order than that illustrated herein.
The method embodiments may be performed in an electronic device or similar computing device in a vehicle that includes a memory and a processor. Taking an example of operation on an electronic device of a vehicle, as shown in fig. 1, the electronic device of the vehicle may include one or more processors 102 (the processors may include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processor (GPU), a Digital Signal Processing (DSP) chip, a Microprocessor (MCU), a programmable logic device (FPGA), a neural Network Processor (NPU), a Tensor Processor (TPU), an Artificial Intelligence (AI) type processor, etc., and a memory 104 for storing data. Optionally, the electronic apparatus of the automobile may further include a transmission device 106, an input/output device 108, and a display device 110 for communication functions. It will be appreciated by those skilled in the art that the configuration shown in fig. 1 is merely illustrative and is not intended to limit the configuration of the electronic device of the vehicle described above. For example, the electronic device of the vehicle may also include more or fewer components than the above structural description, or have a different configuration than the above structural description.
The memory 104 may be used to store computer programs, such as software programs of application software and modules, such as computer programs corresponding to the methods of vehicle energy management in embodiments of the present application, and the processor 102 executes the computer programs stored in the memory 104 to perform various functional applications and data processing, i.e., to implement the methods of vehicle energy management described above. Memory 104 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include memory remotely located relative to the processor 102, which may be connected to the mobile terminal via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The transmission means 106 is arranged to receive or transmit data via a network. Specific examples of the network described above may include a wireless network provided by a communication provider of the mobile terminal. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, simply referred to as NIC) that can connect to other network devices through a base station to communicate with the internet. In one example, the transmission device may be a Radio Frequency (RF) module, which is used to communicate with the internet wirelessly.
The display device 110 may be, for example, a touch screen type Liquid Crystal Display (LCD) and a touch display (also referred to as a "touch screen" or "touch display"). The liquid crystal display may enable a user to interact with a user interface of the mobile terminal. In some embodiments, the mobile terminal has a Graphical User Interface (GUI), and the user may interact with the GUI by touching finger contacts and/or gestures on the touch-sensitive surface, where the man-machine interaction functions optionally include the following interactions: executable instructions for performing the above-described human-machine interaction functions, such as creating web pages, drawing, word processing, making electronic documents, games, video conferencing, instant messaging, sending and receiving electronic mail, talking interfaces, playing digital video, playing digital music, and/or web browsing, are configured/stored in a computer program product or readable storage medium executable by one or more processors.
In this embodiment, a method for vehicle energy management of an electronic device operating on the vehicle is provided, and fig. 2 is a flowchart of a method for vehicle energy management according to one embodiment of the present application, as shown in fig. 2, where the flowchart includes the following steps:
step S31, acquiring state information of a storage battery and load information of a vehicle, wherein the state information comprises at least one of the following: the temperature of the storage battery and the voltage of the storage battery, and the load information comprises low-voltage load power consumption of the vehicle;
low voltage load power consumption refers to the power integration of all devices on a vehicle that use low voltage electricity. Low voltage loads on vehicles generally refer to electronic devices and systems in vehicles that use lower voltages. The following are some common low voltage loads:
1. an illumination system: including various lighting fixtures inside and outside the vehicle, such as headlights, taillights, turn signals, fog lights, instrument panel lighting, etc.
2. Motorized window and skylight: modern vehicles are often equipped with motorized windows and skylights that use a low voltage power supply to provide power.
3. A braking system: the braking systems of vehicles typically include an Antilock Braking System (ABS) and an electronic stability control system (ESC) that operate using a low voltage power supply.
4. Entertainment system: including radios, CD/DVD players, bluetooth connections, audio speakers, etc., which use a low voltage power supply to provide audio and video functionality.
5. An air conditioning system: air conditioning systems for vehicles typically operate using low voltage power sources, including fans, compressors, and control panels.
6. Navigation system: navigation systems commonly found in modern vehicles also require a low voltage power supply to provide power.
7. Charging jack: USB charging ports and other charging sockets on vehicles also belong to low voltage loads for charging mobile devices such as cell phones, tablet computers, etc.
8. Seat heating and ventilation system: seat heating and ventilation systems provided in some advanced vehicle models also operate using low voltage power supplies.
These low voltage load devices typically obtain the required power supply through the battery and generator of the vehicle.
Step S32, generating a target strategy set based on the state information and the load information, wherein the target strategy set is used for controlling at least one of a DCDC converter and a storage battery of a vehicle to output current values so as to meet low-voltage load power consumption and is used for controlling the DCDC converter to execute a charging task or a power-off task on the storage battery;
the DCDC converter can convert high-voltage power of the power battery into low-voltage power to charge the storage battery. The DCDC converter on the vehicle is an electronic device for converting direct current output from a high-voltage battery of an electric vehicle into direct current required for a low-voltage battery and an electric system of the vehicle. It is typically installed in a battery management system of a vehicle and functions as electric energy conversion and distribution.
The main function of the DCDC converter is to convert the dc voltage (typically hundreds to kilovolts) output from the high voltage battery to a lower operating voltage (typically 12V or 48V) to meet the power requirements of various devices in the vehicle electrical system. The power supply is stable by reducing the voltage, so that the equipment such as lamplight, sound equipment, air conditioner and the like of the vehicle can work normally.
In addition, the DCDC converter also has a power management function, and can monitor and control the charging and discharging processes of the battery so as to ensure the safety and performance of the battery. The protection circuit has the functions of overvoltage protection, undervoltage protection, overcurrent protection and the like, and can effectively protect batteries and electrical systems from voltage fluctuation and current overload.
The DCDC converter is designed and selected to take into account the electrical system load, battery capacity, and voltage requirements of the vehicle. In general, a DCDC converter of an electric vehicle adopts a high-efficiency switching power supply technology, so as to reduce energy loss and heat generation and improve the energy efficiency and the endurance mileage of the whole vehicle system.
DCDC converters play an important role in electric vehicles, converting dc power output from a high-voltage battery into low-voltage power, and providing a stable and reliable power supply for the electrical systems of the vehicle. Its functions include electric energy conversion, electric energy management and circuit protection, etc., and are critical for normal operation and performance improvement of electric vehicles.
At least one of the DCDC converter and the battery outputs a current value to satisfy low-voltage load power consumption, comprising: only the DCDC converter outputs a current value to meet low-voltage load power consumption; only the current value is output in the storage battery to meet the low-voltage load power consumption; the DCDC converter and the storage battery respectively output current values so as to correspondingly meet the low-voltage load power consumption of different proportions.
Through the steps, a mode of acquiring the state information of the storage battery and the load information of the vehicle is adopted, and a target strategy set is generated based on the state information and the load information, so that the purpose of comprehensively considering the state of the storage battery and the actual low-voltage load condition of the vehicle to control the DCDC converter and the output of the storage battery is achieved, the technical effects of improving the DCDC energy conversion efficiency and preventing the energy loss are achieved, and the technical problem of high energy loss of the vehicle caused by unreasonable low-voltage energy management method is solved.
Optionally, the DCDC converter is electrically connected with the storage battery through a low-voltage relay, the DCDC converter is controlled to perform a charging task on the storage battery, the low-voltage relay is combined, and the DCDC converter is controlled to perform a power-off task on the storage battery, the low-voltage relay is disconnected.
FIG. 3 is a block schematic diagram of a vehicle energy management unit according to an alternative embodiment of the application. As shown in fig. 3, the low voltage energy management unit includes a control module, a low voltage relay, a temperature information acquisition module, a voltage information acquisition module, and a current information acquisition module. The control module judges the current temperature and voltage state of the storage battery, controls the DCDC to supply power to the storage battery by controlling the low-voltage relay to be disconnected and attracted, can prevent the DCDC from overcharging the storage battery, and ensures the safety of the vehicle. The low-voltage relay is used for controlling the on-off of a power supply loop between the DCDC and the storage battery. The temperature information acquisition module is used for acquiring the temperature of the storage battery in real time and monitoring the temperature state of the storage battery. The voltage information acquisition module is used for acquiring the voltage of the storage battery in real time and monitoring the voltage state of the battery. The current information acquisition module is used for feeding back the current value of the DCDC charging current to the control module, and the control module is used for controlling the DCDC supply power value to be an efficiency optimal value.
Optionally, generating the target policy set based on the state information and the load information includes: judging whether the temperature of the storage battery is greater than a preset safety threshold value or not; if so, generating a first target control instruction and a second target control instruction in the target strategy set, wherein the first target control instruction is used for controlling the DCDC converter to output a first current value so as to meet all low-voltage load power consumption, and the second target control instruction is used for controlling the DCDC converter to execute a power-off task on the storage battery.
That is, the low-voltage energy management unit obtains the current battery temperature through the temperature information obtaining module, if the current battery temperature exceeds the preset safety temperature (namely, the safety threshold value), which indicates that the battery has an overtemperature risk at this time, the low-voltage battery keeps in a disconnected state, so that the DCDC is prevented from being charged by mistake, and the overtemperature risk is increased. The DCDC provides the full energy consumption of the low voltage at this time.
Judging whether the temperature of the storage battery is greater than a preset safety threshold, wherein the method further comprises the following steps: and controlling the low-voltage energy management unit to carry out low-voltage charging, and controlling the low-voltage relay to keep an off state by the low-voltage energy management unit.
Optionally, generating the target policy set based on the state information and the load information further includes: under the condition that the temperature is not larger than a safety threshold value, judging whether the voltage is larger than a preset safety voltage value or not: if so, generating a first target control instruction and a third target control instruction in the target strategy set, wherein the third target control instruction is used for controlling the DCDC converter to execute a charging task on the storage battery.
That is, if the current battery temperature is less than the preset temperature, the low-voltage energy management unit obtains the current battery voltage value through the voltage information obtaining module. And if the current voltage value of the storage battery is smaller than the safety voltage value, the storage battery is at the risk of power shortage. The low-voltage energy management unit controls the low-voltage relay to be closed through the control module, controls the DCDC to supply power for the storage battery, and provides low-voltage load and energy consumption of the storage battery at the moment.
Optionally, generating the target policy set based on the state information and the load information further includes: under the condition that the voltage is not larger than the safety voltage value, judging whether the power consumption of the low-voltage load is larger than the optimal power value output by the DCDC converter or not; if so, generating a fourth target control instruction in the target strategy set, wherein the fourth target control instruction is used for controlling the DCDC converter to output current at the optimal power value to meet the low-voltage load power consumption of one part, and controlling the storage battery to output a second current value to meet the low-voltage load power consumption of the other part, and the second current value is determined by the optimal power value and the low-voltage load power consumption.
That is, if the current voltage value of the storage battery is greater than the safety voltage, it is determined that the storage battery is not at risk of power shortage. At this time, it is determined whether the low voltage load power consumption is greater than the DCDC optimum power value. And if the current low-voltage load power consumption is larger than the DCDC optimal power value, the low-voltage energy management unit controls the DCDC output current value through the control module, so that the DCDC output power value is kept at the efficiency optimal value, and the excess power consumption is provided by the storage battery.
Optionally, generating the target policy set based on the state information and the load information further includes: and generating a first target control instruction and a third target control instruction under the condition that the low-voltage load power consumption is not larger than the optimal power value.
That is, if the current low-voltage load power consumption value is smaller than the DCDC optimal power consumption value, the low-voltage energy management unit controls the low-voltage relay to be closed, controls the DCDC to charge the storage battery, and provides the low-voltage load and the storage battery power consumption by the DCDC.
The method of vehicle energy management further comprises: when the storage battery is full, the low-voltage relay is disconnected, the DCDC is stopped to supply power to the storage battery, and the temperature, the voltage and the energy consumption state of the storage battery are judged in real time in the whole low-voltage power-on process until the low-voltage power-on process is finished.
By adopting the technical scheme in the embodiment, a novel vehicle energy management method is provided, the electric quantity and DCDC conversion efficiency of the storage battery are reasonably utilized by combining the current temperature and electric quantity of the storage battery and the current low-voltage load condition, the energy is reasonably distributed, and the current DCDC output power is controlled under the conditions that the user experience is not affected and the driving safety of the vehicle is ensured, so that the energy consumption is further reduced, and the vehicle use mileage is prolonged. And the energy management control unit can control the state of the low-voltage relay by judging the current state and the load condition of the storage battery, prevent the storage battery from being overcharged by DCDC and enhance the safety.
Fig. 5 is a block diagram of an apparatus for vehicle energy management according to one embodiment of the present application, as shown in fig. 5, the apparatus comprising: an obtaining module 51, configured to obtain state information of a storage battery and load information of a vehicle, where the state information includes at least one of: the temperature of the storage battery and the voltage of the storage battery, and the load information comprises low-voltage load power consumption of the vehicle;
a generating module 52 for generating a target policy set for controlling at least one of an output current value of a DCDC converter and the battery of the vehicle to satisfy the low-voltage load power consumption and for controlling the DCDC converter to perform a charging task or a power-off task on the battery, based on the state information and the load information.
Through the device, the mode of acquiring the state information of the storage battery and the load information of the vehicle is adopted, and the target strategy set is generated based on the state information and the load information, so that the purpose of comprehensively considering the state of the storage battery and the actual low-voltage load condition of the vehicle to control the DCDC converter and the output of the storage battery is achieved, the technical effects of improving the DCDC energy conversion efficiency and preventing the energy loss are achieved, and the technical problem of high energy loss of the vehicle caused by unreasonable low-voltage energy management method is solved.
It should be noted that each of the above modules may be implemented by software or hardware, and for the latter, it may be implemented by, but not limited to: the modules are all located in the same processor; alternatively, the above modules may be located in different processors in any combination.
An embodiment of the application also provides a storage medium having a computer program stored therein, wherein the computer program is arranged to perform the steps of any of the method embodiments described above when run.
Alternatively, in the present embodiment, the above-described storage medium may be configured to store a computer program for performing the steps of:
step S1, acquiring state information of a storage battery and load information of a vehicle, wherein the state information comprises at least one of the following steps: the temperature of the storage battery and the voltage of the storage battery, and the load information comprises low-voltage load power consumption of the vehicle;
and step S2, generating a target strategy set based on the state information and the load information, wherein the target strategy set is used for controlling at least one of a DCDC converter and a storage battery of the vehicle to output current values so as to meet low-voltage load power consumption and is used for controlling the DCDC converter to execute a charging task or a power-off task on the storage battery.
Embodiments of the application also provide a processor arranged to run a computer program to perform the steps of any of the method embodiments described above.
Alternatively, in the present embodiment, the above-described processor may be configured to execute the following steps by a computer program:
step S1, acquiring state information of a storage battery and load information of a vehicle, wherein the state information comprises at least one of the following steps: the temperature of the storage battery and the voltage of the storage battery, and the load information comprises low-voltage load power consumption of the vehicle;
and step S2, generating a target strategy set based on the state information and the load information, wherein the target strategy set is used for controlling at least one of a DCDC converter and a storage battery of the vehicle to output current values so as to meet low-voltage load power consumption and is used for controlling the DCDC converter to execute a charging task or a power-off task on the storage battery.
According to a further aspect of embodiments of the present application there is also provided a vehicle comprising a memory, a processor, the memory having stored therein a computer program, the processor being arranged to run the computer program to perform the steps of any of the method embodiments described above.
Alternatively, in the present embodiment, the above-described processor may be configured to execute the following steps by a computer program:
step S1, acquiring state information of a storage battery and load information of a vehicle, wherein the state information comprises at least one of the following steps: the temperature of the storage battery and the voltage of the storage battery, and the load information comprises low-voltage load power consumption of the vehicle;
and step S2, generating a target strategy set based on the state information and the load information, wherein the target strategy set is used for controlling at least one of a DCDC converter and a storage battery of the vehicle to output current values so as to meet low-voltage load power consumption and is used for controlling the DCDC converter to execute a charging task or a power-off task on the storage battery.
Alternatively, specific examples in this embodiment may refer to examples described in the foregoing embodiments and optional implementations, and this embodiment is not described herein.
The foregoing embodiment numbers of the present application are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
In the foregoing embodiments of the present application, the descriptions of the embodiments are emphasized, and for a portion of this disclosure that is not described in detail in this embodiment, reference is made to the related descriptions of other embodiments.
In the several embodiments provided in the present application, it should be understood that the disclosed technology may be implemented in other manners. The above-described embodiments of the apparatus are merely exemplary, and the division of the units, for example, may be a logic function division, and may be implemented in another manner, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interfaces, units or modules, or may be in electrical or other forms.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in part or all of the technical solution or in part in the form of a software product stored in a storage medium, including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The foregoing is merely a preferred embodiment of the present application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present application, which are intended to be comprehended within the scope of the present application.

Claims (10)

1. A method of vehicle energy management, comprising:
acquiring state information of a storage battery and load information of a vehicle, wherein the state information comprises at least one of the following: the temperature of the storage battery and the voltage of the storage battery, and the load information comprises low-voltage load power consumption of the vehicle;
and generating a target strategy set based on the state information and the load information, wherein the target strategy set is used for controlling at least one of a DCDC converter and a storage battery of a vehicle to output current values so as to meet the low-voltage load power consumption, and is used for controlling the DCDC converter to execute a charging task or a power-off task on the storage battery.
2. The method of claim 1, wherein generating a set of target policies based on the status information and the load information comprises:
judging whether the temperature of the storage battery is greater than a preset safety threshold value or not;
and if so, generating a first target control instruction and a second target control instruction in the target strategy set, wherein the first target control instruction is used for controlling the DCDC converter to output a first current value so as to meet all low-voltage load power consumption, and the second target control instruction is used for controlling the DCDC converter to execute a power-off task on the storage battery.
3. The method of claim 2, wherein generating a target policy set based on the status information and the load information further comprises:
judging whether the voltage is larger than a preset safety voltage value or not under the condition that the temperature is not larger than the safety threshold value:
and if so, generating the first target control instruction and a third target control instruction in the target strategy set, wherein the third target control instruction is used for controlling the DCDC converter to execute a charging task on the storage battery.
4. The method of claim 3, wherein generating a target policy set based on the status information and the load information further comprises:
judging whether the low-voltage load power consumption is larger than the optimal power value output by the DCDC converter under the condition that the voltage is not larger than the safety voltage value;
if so, generating a fourth target control instruction in the target strategy set, wherein the fourth target control instruction is used for controlling the DCDC converter to output current at an optimal power value to meet part of the low-voltage load power consumption and controlling the storage battery to output a second current value to meet the other part of the low-voltage load power consumption, and the second current value is determined by the optimal power value and the low-voltage load power consumption.
5. The method of claim 4, wherein generating a target policy set based on the status information and the load information further comprises:
and generating the first target control instruction and the third target control instruction under the condition that the low-voltage load power consumption is not larger than the optimal power value.
6. The method of claim 1, wherein the DCDC converter is electrically connected to the battery via a low voltage relay, wherein controlling the DCDC converter to perform a charging task on the battery comprises controlling the low voltage relay in combination, and wherein controlling the DCDC converter to perform a power down task on the battery comprises controlling the low voltage relay to open.
7. An apparatus for vehicle energy management, comprising:
the system comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring state information of a storage battery and load information of a vehicle, and the state information comprises at least one of the following components: the temperature of the storage battery and the voltage of the storage battery, and the load information comprises low-voltage load power consumption of the vehicle;
the system comprises a generation module, a control module and a power failure module, wherein the generation module is used for generating a target strategy set based on the state information and the load information, wherein the target strategy set is used for controlling at least one output current value of a DCDC converter and a storage battery of a vehicle so as to meet the low-voltage load power consumption, and is used for controlling the DCDC converter to execute a charging task or a power failure task on the storage battery.
8. A computer readable storage medium, characterized in that the computer readable storage medium comprises a stored program, wherein the program when run controls a device in which the computer readable storage medium is located to perform the method according to any one of claims 1 to 6.
9. A processor, characterized in that the processor is adapted to run a program, wherein the program is arranged to execute the method of any of the claims 1 to 6 at run-time.
10. A vehicle comprising a memory and a processor, wherein the memory has stored therein a computer program, the processor being arranged to run the computer program to perform the method of any of claims 1 to 6.
CN202311279625.1A 2023-09-28 2023-09-28 Vehicle energy management method and device, storage medium and vehicle Pending CN117103993A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117713321A (en) * 2024-01-16 2024-03-15 广汽埃安新能源汽车股份有限公司 Vehicle DCDC output voltage control method, storage medium and electronic equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117713321A (en) * 2024-01-16 2024-03-15 广汽埃安新能源汽车股份有限公司 Vehicle DCDC output voltage control method, storage medium and electronic equipment

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