CN114932840A - Control method and device of power management system, storage medium and processor - Google Patents
Control method and device of power management system, storage medium and processor Download PDFInfo
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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
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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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
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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
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
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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
- 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
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- 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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
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- 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
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
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- 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
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
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- 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
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
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- 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
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
- H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
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- 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
- B60L2210/00—Converter types
- B60L2210/10—DC to DC converters
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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
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- 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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- Power Engineering (AREA)
- Transportation (AREA)
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Abstract
The invention discloses a control method and device of a power management system, a storage medium and a processor. The method comprises the following steps: receiving a power-off instruction of a target vehicle, wherein the power-off instruction is used for controlling a power management system to execute preset power-off operation, and the preset power-off operation comprises at least one of the following operations: cutting off the connection between the original low-voltage storage battery and the low-voltage accessory system and the connection between the standby low-voltage storage battery and the low-voltage accessory system; acquiring the environment temperature of a target vehicle, the electric quantity of an original low-voltage storage battery and the electric quantity of a standby low-voltage storage battery; responding to the condition that the environment temperature meets the preset condition, and generating a control instruction set, wherein the control instruction set is used for controlling a power supply management system to execute a power supply strategy, and the power supply strategy comprises at least one of the following steps: and the power is supplemented for the standby low-voltage storage battery and the original low-voltage storage battery. The invention solves the technical problem of low-voltage storage battery feeding.
Description
Technical Field
The invention relates to the field of electric automobiles, in particular to a control method and device of a power management system, a storage medium and a processor.
Background
The low-voltage storage battery of the pure electric vehicle can occasionally generate a feed phenomenon, so that the controller cannot work, the vehicle cannot be started, and great complaints of users are brought. The main reasons for the low-voltage storage battery to generate power feed are three points: firstly, different from a traditional fuel vehicle, a pure electric vehicle has more powerful and more intelligent functions, a large number of low-voltage controllers and sensors are arranged on the vehicle, the low-voltage load power consumption is large, the static current is large after the whole vehicle network is dormant, the energy of a low-voltage storage battery is limited, the vehicle is placed for a long time after being extinguished and powered off, the electric quantity of the storage battery is gradually exhausted, and the feed occurs; secondly, when the whole vehicle network fails, the CAN network does not sleep normally after a user stops and powers off, a plurality of controllers are still in an awakening state, the power is high, the power consumption is high, the electric quantity of a low-voltage storage battery is exhausted quickly, and the power feeding occurs; thirdly, when the vehicle is improperly used by individual users, for example, the vehicle is not parked for a long time or the vehicle is frequently started and closed, the vehicle is not dormant for a long time, a plurality of controllers are still in an awakening state, the power is high, the power consumption is high, the electric quantity of the low-voltage storage battery is quickly exhausted, and the power feeding occurs.
In order to solve the problem of feeding of low-voltage storage batteries, a storage battery with a larger capacity is generally configured, and some storage batteries even adopt two low-voltage storage batteries, but the feeding problem cannot be fundamentally avoided.
Disclosure of Invention
The embodiment of the invention provides a control method and device of a power management system, a storage medium and a processor, which are used for at least solving the technical problem of low-voltage storage battery feeding.
According to an aspect of an embodiment of the present invention, there is provided a control method of a power management system, including: receiving a power-off instruction of a target vehicle, wherein the power-off instruction is used for controlling a power management system to execute preset power-off operation, and the preset power-off operation comprises at least one of the following operations: cutting off the connection between the original low-voltage storage battery and the low-voltage accessory system and the connection between the standby low-voltage storage battery and the low-voltage accessory system; acquiring the ambient temperature of a target vehicle, the electric quantity of an original low-voltage storage battery and the electric quantity of a standby low-voltage storage battery; responding to the condition that the environment temperature meets the preset condition, and generating a control instruction set, wherein the control instruction set is used for controlling a power supply management system to execute a power supply strategy, and the power supply strategy comprises at least one of the following steps: and the power is supplemented for the standby low-voltage storage battery and the original low-voltage storage battery.
Optionally, in response to that the environmental temperature meets a preset condition, a control instruction set is generated, where the control instruction set is used to control the power management system to execute a power supply compensation policy, and the method includes: under the condition that the ambient temperature meets a first preset condition, judging whether the power consumption of the original low-voltage storage battery is larger than a first power threshold value or not; if so, generating a first target instruction in the control instruction set, wherein the first target instruction is used for controlling the power supply management system to supplement power for the standby low-voltage storage battery; and after the standby low-voltage storage battery is fully charged, controlling the power management system to execute preset power-off operation.
Optionally, the control method further includes: and controlling the power management system to record the fault code of the original low-voltage storage battery under the condition that the power consumption of the original low-voltage storage battery is determined to be larger than the first power threshold.
Optionally, in response to that the environmental temperature meets a preset condition, a control instruction set is generated, where the control instruction set is used to control the power management system to execute a power supply compensation policy, and the method includes: under the condition that the ambient temperature meets a second preset condition, judging whether the power consumption of the original low-voltage storage battery is larger than a second power threshold value; if not, judging whether the power consumption of the original low-voltage storage battery is larger than a third power threshold; if so, generating a second target instruction in the control instruction set, wherein the second target instruction is used for controlling the power supply management system to supplement power for the original low-voltage storage battery; and after the original low-voltage storage battery is fully charged, controlling the power management system to execute preset power-off operation.
Optionally, in response to that the environmental temperature meets a preset condition, a control instruction set is generated, where the control instruction set is used to control the power management system to execute a power supply compensation policy, and the method includes: and under the condition that the ambient temperature meets the preset condition, waking up the power management system to measure the power consumption of the original low-voltage storage battery.
Optionally, in response to that the environmental temperature meets a preset condition, a control instruction set is generated, where the control instruction set is used to control the power management system to execute a power supply compensation policy, and the method includes: in the electricity supplementing process, the output end voltage of a DCDC converter connected with the low-voltage storage battery to be charged is adjusted based on the battery electricity quantity of the low-voltage storage battery to be charged and the ambient temperature.
According to another aspect of the embodiments of the present invention, there is also provided a control device for a power management system, including: the receiving module is used for receiving a high-voltage power-off instruction of the target vehicle, wherein the power-off instruction is used for controlling the power management system to execute preset power-off operation, and the preset power-off operation comprises at least one of the following operations: cutting off the DCDC converter, the connection between the original low-voltage storage battery and the low-voltage accessory system, and the connection between the standby low-voltage storage battery and the low-voltage accessory system; the acquisition module is used for acquiring the ambient temperature of the target vehicle and the electric quantity of the original low-voltage storage battery; the control module is used for responding to the condition that the environmental temperature meets the preset condition, generating a control instruction set, and controlling the power management system to execute a power supply compensation strategy, wherein the power supply compensation strategy comprises at least one of the following: and the power is supplemented for the standby low-voltage storage battery and the original low-voltage storage battery.
According to another aspect of the embodiments of the present invention, there is also provided a computer storage medium, where the computer storage medium includes a stored program, and when the program runs, the apparatus in which the computer storage medium is located is controlled to execute the control method in any one of the above schemes.
According to another aspect of the embodiments of the present invention, there is also provided a processor for executing a program, the processor being configured to execute a computer program to perform the control method of any one of the above aspects.
According to another aspect of the embodiments of the present invention, there is also provided an electronic device, including a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the computer program to execute the control method of any one of the above aspects.
In the embodiment of the invention, under the condition of no vehicle using requirement, the connection between the low-voltage storage battery and the low-voltage accessory system is cut off according to the power-off instruction, the extra power consumption of the low-voltage accessory system is reduced, and the power feed of the low-voltage storage battery is prevented. After the vehicle is powered off, the low-voltage storage battery is subjected to stage power supplement according to the power consumption condition of the low-voltage storage battery, so that the situation that the next power-on cannot be carried out due to the power feeding of the low-voltage storage battery is prevented.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention and do not constitute a limitation of the invention. In the drawings:
fig. 1 is a block diagram of an electronic device applied to a vehicle and having an alternative control method of a power management system according to an embodiment of the invention;
FIG. 2 is a flow chart illustrating an alternative method of controlling a power management system according to an embodiment of the invention;
FIG. 3 is a schematic diagram of circuitry of an alternative power management system according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of signal circuitry of an alternative power management system according to an embodiment of the present invention;
FIG. 5 is a flow chart illustrating an alternative method of controlling a power management system according to an embodiment of the invention;
FIG. 6 is a flow chart illustrating an alternative method of controlling a power management system according to an embodiment of the invention;
fig. 7 is a block diagram of a control device of an alternative power management system according to an embodiment of the invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Moreover, 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.
In accordance with an embodiment of the present invention, there is provided a method embodiment of a control method for a power management system, it should be noted that the steps illustrated in the flowchart of the accompanying drawings may be performed in a computer system such as a set of computer executable instructions, and that while a logical order is illustrated in the flowchart, in some cases the steps illustrated or described may be performed in an order different than here.
The method embodiments may be performed in an electronic device or similar computing device that includes a memory and a processor in a vehicle. Taking the example of an electronic device operating on 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, Central Processing Units (CPUs), Graphics Processing Units (GPUs), Digital Signal Processing (DSP) chips, Microprocessors (MCUs), programmable logic devices (FPGAs), neural Network Processors (NPUs), Tensor Processors (TPUs), Artificial Intelligence (AI) type processors, etc.) and a memory 104 for storing data. Optionally, the electronic device 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 understood by those skilled in the art that the structure shown in fig. 1 is merely an illustration and is not intended to limit the structure of the electronic device of the vehicle. For example, the electronic device of the vehicle may also include more or fewer components than described above, or have a different configuration than described above.
The memory 104 can be used to store computer programs, for example, software programs and modules of application software, such as a computer program corresponding to the control method of the power management system in the embodiment of the present invention, and the processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, so as to implement the control method of the hydrogen direct injection system. The 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 located remotely from the processor 102, which may be connected to the mobile terminal over 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 device 106 is used for receiving or transmitting 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 (NIC), which can be connected to other Network devices through a base station so as to communicate with the internet. In one example, the transmission device may be a Radio Frequency (RF) module, which is used for communicating with the internet in a wireless manner.
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 screen"). 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) with which a user can interact by touching finger contacts and/or gestures on a touch-sensitive surface, where the human-machine interaction function optionally includes the following interactions: executable instructions for creating web pages, drawing, word processing, making electronic documents, games, video conferencing, instant messaging, emailing, call interfacing, playing digital video, playing digital music, and/or web browsing, etc., for performing the above-described human-computer interaction functions, are configured/stored in one or more processor-executable computer program products or readable storage media.
Fig. 2 is a flowchart of a control method of a power management system according to an embodiment of the present invention, and as shown in fig. 2, the flowchart includes the following steps: step S1: receiving a power-off instruction of a target vehicle, wherein the power-off instruction is used for controlling a power management system to execute preset power-off operation, and the preset power-off operation comprises at least one of the following operations: the connection between the original low-voltage storage battery and the low-voltage accessory system is cut off, and the connection between the standby low-voltage storage battery and the low-voltage accessory system is cut off. Step S2: and acquiring the ambient temperature of the target vehicle, the electric quantity of the original low-voltage storage battery and the electric quantity of the standby low-voltage storage battery. Step S3: responding to the condition that the environment temperature meets the preset condition, and generating a control instruction set, wherein the control instruction set is used for controlling a power supply management system to execute a power supply strategy, and the power supply strategy comprises at least one of the following steps: and the power is supplemented for the standby low-voltage storage battery and the original low-voltage storage battery.
In the embodiment of the application, under the condition that the vehicle using requirement is not needed, the connection between the low-voltage storage battery and the low-voltage accessory system is cut off according to the power-off instruction, the extra power consumption of the low-voltage accessory system is reduced, and the low-voltage storage battery is prevented from feeding power. After the vehicle is powered off, the low-voltage storage battery is subjected to stage power supplement according to the power consumption condition of the low-voltage storage battery, so that the situation that the next power-on cannot be carried out due to the power feeding of the low-voltage storage battery is prevented.
Optionally, in step 3, in response to that the ambient temperature meets a preset condition, a control instruction set is generated, where the control instruction set is used to control the power management system to execute a power supplement policy, and the method includes: under the condition that the ambient temperature meets a first preset condition, judging whether the power consumption of the original low-voltage storage battery is larger than a first power threshold value or not; if yes, generating a first target instruction in the control instruction set, wherein the first target instruction is used for controlling the power management system to supplement power for the standby low-voltage storage battery; and after the standby low-voltage storage battery is fully charged, controlling the power management system to execute preset power-off operation. The first preset condition is the duration of the environment temperature within a preset temperature range, and different preset temperature ranges correspond to different durations.
In the above steps, when the ambient temperature is within a certain preset temperature range and the duration exceeds the corresponding preset duration, if the power consumption of the original low-voltage storage battery is greater than the first power threshold, it indicates that the original low-voltage storage battery fails, the original low-voltage storage battery cannot be normally used when the original low-voltage storage battery is powered on next time, and the standby low-voltage storage battery needs to be used when the original low-voltage storage battery is powered on next time, so that the standby low-voltage storage battery is charged and fully charged to ensure the next normal power on next time.
Optionally, in step 3, the control method further includes: and controlling the power management system to record the fault code of the original low-voltage storage battery under the condition that the power consumption of the original low-voltage storage battery is determined to be larger than the first power threshold.
In the above steps, the power consumption of the original low-voltage storage battery is larger than the first power threshold value, namely the original low-voltage storage battery fails, and the power management system records the fault code of the original low-voltage storage battery, so that the user is reminded to maintain in time and the subsequent use is avoided being influenced.
Optionally, in step 3, in response to that the ambient temperature meets a preset condition, a control instruction set is generated, where the control instruction set is used to control the power management system to execute a power supplement policy, and the method includes: under the condition that the ambient temperature meets a second preset condition, judging whether the power consumption of the original low-voltage storage battery is larger than a second power threshold value; if not, judging whether the power consumption of the original low-voltage storage battery is larger than a third power threshold value; if so, generating a second target instruction in the control instruction set, wherein the second target instruction is used for controlling the power supply management system to supplement power for the original low-voltage storage battery; and after the original low-voltage storage battery is fully charged, controlling the power management system to execute preset power-off operation. The second preset condition is the duration of the environment temperature within a preset temperature range, and different preset temperature ranges correspond to different durations.
In the above steps, the power consumption of the original low-voltage storage battery is smaller than or equal to the second power threshold, which indicates that the original low-voltage storage battery has no fault and can be used normally. If the power consumption of the original low-voltage storage battery is larger than the third power threshold, the residual power of the original low-voltage storage battery is low, and power supplement is needed to avoid feeding.
Optionally, in step 3, in response to that the ambient temperature meets a preset condition, a control instruction set is generated, where the control instruction set is used to control the power management system to execute a power supplement policy, and the method includes: and under the condition that the ambient temperature meets the preset condition, waking up the power management system to measure the power consumption of the original low-voltage storage battery.
In the above steps, the power management system is waken up to perform power monitoring only when the ambient temperature meets the preset condition, so as to avoid unnecessary power loss caused by monitoring the power all the time.
Optionally, in step 3, in response to that the ambient temperature meets a preset condition, a control instruction set is generated, where the control instruction set is used to control the power management system to execute a power supplement policy, and the method includes: in the electricity supplementing process, the output end voltage of a DCDC converter connected with the low-voltage storage battery to be charged is adjusted based on the battery electricity quantity of the low-voltage storage battery to be charged and the ambient temperature.
In the above steps, in the electricity compensation process, the output terminal voltage of the DCDC converter is adjusted according to the battery electricity quantity of the low-voltage storage battery to be charged and the ambient temperature. For example: when the electric quantity of the low-voltage storage battery to be charged is higher, the output end voltage of the DCDC converter is properly reduced, so that the consumed power of low-voltage accessories is reduced, the power consumption of the whole vehicle is reduced, and the charging electric energy is saved.
An embodiment of the present application further provides a circuit schematic diagram of a power management system, as shown in fig. 3, including: the system comprises a high-voltage power battery, a DCDC converter (hereinafter referred to as DCDC), a first low-voltage storage battery, a second low-voltage storage battery, a vehicle-mounted charger, a switch S1, a switch S2, a direct-current charging pile, a vehicle control unit (hereinafter referred to as VCU), a low-voltage accessory system, a battery management system (hereinafter referred to as BMS), a motor system, a high-voltage accessory system and the like. Wherein switch S1 is in series with the first low voltage battery as a backup low voltage battery, the second low voltage battery as a primary low voltage battery, and switch S2 is in series with the low voltage accessory system.
An embodiment of the present application further provides a signal line schematic diagram of a power management system, as shown in fig. 4, including: VCU, DCDC, BMS, first low-voltage battery charge monitor, second low-voltage battery charge monitor. The first low-voltage battery charge monitor is used to monitor the first low-voltage battery state of charge (SOC1) and transmit this signal to the VCU. The second low-voltage battery charge monitor is operative to monitor a state of charge (SOC2) of the second low-voltage battery and to transmit the signal to the VCU. The BMS is used for monitoring the state of charge (SOC3) and the fault state of the high-voltage power battery in real time and transmitting relevant signals to the VCU, and can also control a relay inside the high-voltage power battery to realize the power-on or power-off of the high-voltage power battery. The DCDC can transmit the opening and closing state of the DCDC to the VCU, can also receive the opening and closing command of the VCU to open or break, and when the DCDC is opened, the electric quantity of the high-voltage power battery can be transmitted to the low-voltage storage battery, the low-voltage accessory system, the VCU and the like, and after the DCDC is closed, the high-voltage power battery cannot supply power to the low-voltage storage battery, the low-voltage accessory system and the VCU. The VCU can control the on or off of the DCDC, can also control the DCDC to carry out output voltage control, can send an instruction to the BMS to control the power-on or power-off of the high-voltage power battery, can comprehensively coordinate and control the dormancy awakening of all controllers of the whole vehicle network, when a certain controller is in an awakened state, the VCU can normally work to send or receive related signals and carry out operation, the power consumption is high, when a certain controller is in a dormant state, the VCU has low power consumption, only has dormant electrostatic current, and meanwhile, the VCU stops working and does not carry out related operation.
The embodiment of the present application further provides an optional control method of the power management system, which is specifically described according to the specific systems shown in fig. 3 and fig. 4. The vehicle state is divided into four working conditions, namely a vehicle start and non-charging state (working condition 1), a vehicle start and charging state (working condition 2), a vehicle stop and non-charging state (working condition 3), and a vehicle stop and charging state (working condition 4), and the specific explanation is as shown in table 1 below.
TABLE 1
The control method corresponding to the working condition 1 is as follows:
as shown in fig. 5, the entire vehicle network is in the awake state, the VCU does not perform the sleep control, the VCU controls the DCDC state to be the on state all the time, the voltage at the DCDC output end is controlled according to the ambient temperature and the state of charge of the second low-voltage battery, the table lookup is performed according to the SOC2 value of the second low-voltage battery to determine the voltage at the DCDC output end, and the voltage at the DCDC output end is shown in table 2. Wherein the temperature T1 is preferably 0 ℃, a non-unique value, by way of example only, and the voltage U1 ranges from 14< U1<16, preferably 14.5V, a non-unique value, by way of example only. The VCU controls switch S2 to be in a closed state and switch S1 to be in an open state by default, and controls according to the state of charge of the first low-voltage battery and the fault state of the second low-voltage battery. When the second low-voltage battery is non-faulty and the first low-voltage battery SOC 1< SOC _ y, switch S1 is closed to charge the first low-voltage battery. When full, switch S1 is open, and so on. When the second low-voltage battery fails, switch S1 is closed. The SOC _ y is related to the temperature, and a table look-up is performed according to the temperature, which is specifically shown in table 3.
Under different storage battery state of charge of different temperatures, the output end voltage of DCDC is adjusted in real time, on one hand, the feed of the second low-voltage storage battery can be prevented, the service life of the second low-voltage storage battery is effectively ensured, and on the other hand, under the state that the electric quantity of the second low-voltage storage battery is higher, the output end voltage of DCDC is properly reduced, so that the consumed power of low-voltage accessories is reduced, the electric consumption of the whole vehicle is reduced, and the endurance mileage is improved. On the other hand, the low-voltage storage battery is connected with the first low-voltage storage battery through the switch S1, the electric quantity state of the low-voltage storage battery is guaranteed to be a high electric quantity state, and the high-voltage storage battery is timely replaced when the second low-voltage storage battery breaks down.
TABLE 2
TABLE 3
The control method corresponding to the working condition 2 is as follows:
the whole vehicle network is in an awakening state, the VCU does not perform dormancy control, the VCU controls the DCDC state to be always in an opening state, the voltage of the DCDC output end is controlled according to the ambient temperature and the charge state of the second low-voltage storage battery, table lookup is performed according to the SOC2 of the second low-voltage storage battery to determine the voltage of the DCDC output end, and the voltage of the DCDC output end is shown in a table 4. The temperature T2 is preferably 0 ℃, a non-unique value, by way of example only, and the voltage U2 ranges from 14.5< U2<16, preferably 15V, and a non-unique value, by way of example only, U2 > U1 (U1 corresponding to the above-described operating condition 1). The VCU controls switch S1 and switch S2 to be in a normally closed state.
Under different storage battery SOC of different temperature, real-time adjustment DCDC's output voltage can prevent the low voltage battery feed on the one hand, effectively guarantees the low voltage battery life-span, and on the other hand under the higher state of low voltage battery electric quantity, suitably reduces DCDC output voltage to reduce the power consumption of low voltage annex, reduce whole car power consumption, practice thrift the electric energy of charging.
TABLE 4
As shown in FIG. 6, the control method corresponding to the working condition 3 is as follows:
and the VCU controls the DCDC to be turned off, sends a command to the BMS to control the internal relay of the high-voltage power battery to be turned off, and the VCU comprehensively coordinates the whole vehicle network to sleep. The VCU control switch S1 is turned off, the VCU control switch S2 is turned off, and the SOC2 and the ambient temperature Tx of the second low-voltage battery are recorded before the sleep. And (3) counting time from the beginning of the sleep of the whole vehicle network, and when the environmental temperature Tx is more than T3(T3 is preferably 0 ℃, and is a non-unique value, just an example), and the counting time exceeds a certain time T1 (preferably 3h, and is a non-unique value, just an example), the VCU wakes up the DCDC, the first low-voltage storage battery charge monitor, the second low-voltage storage battery charge monitor and the BMS. The VCU judges according to the second low-voltage battery SOC2 reported by the second low-voltage battery charge monitor (assuming that the SOC2 is SOCx at the moment):
if SOC2-SOCx > SOC _ cal1 (the fixed value of SOC _ cal1 is calibrated, preferably 5%, by way of example only, and not the only non-exclusive value), then the second low-voltage battery is considered to be abnormal, the VCU reports the fault of the second low-voltage battery, records a fault code, and the VCU sends the fault to an instrument for prompting the next time the driver opens the starting switch to start the vehicle. VCU control switch S1 is closed, VCU sends the order to BMS simultaneously, start the high-pressure power battery internal relay and carry out high-pressure power on, and VCU control DCDC opens, output voltage 16V, high-pressure power battery charges for first low voltage battery and second low voltage battery, after first low voltage battery is full of, VCU begins to control DCDC and closes, and send the order to BMS control high-pressure power battery internal relay disconnection, go on down to high-pressure power battery, VCU synthesizes and coordinates BMS, DCDC, first low voltage battery electric quantity monitor, second low voltage battery electric quantity monitor carries out the dormancy, and carry out the timing before the dormancy, repeat the above-mentioned operation.
If SOC2-SOCx ≦ SOC _ cal1(SOC _ cal1 constant may be calibrated, preferably 5%, by way of example only, not the only value), then it is assumed that there is no abnormality in the second low-voltage battery system and switch S1 remains open.
If SOC _ cal2 is more than SOC2-SOCx is less than or equal to SOC _ cal1, the VCU sends a command to the BMS, an internal relay of the high-voltage power battery is started to carry out high-voltage power-on, the VCU controls the DCDC to be started and outputs voltage of 16V, the high-voltage power battery charges the second low-voltage storage battery, when the electric quantity is full, the VCU starts to control the DCDC to be stopped and sends a command to the BMS to control the internal relay of the high-voltage power battery to be disconnected, the high-voltage power battery is powered off, the VCU comprehensively coordinates the BMS, the DCDC, the first low-voltage storage battery electric quantity monitor and the second low-voltage storage battery electric quantity monitor to carry out dormancy, and the operations are repeated before the dormancy is timed.
If SOC2-SOCx ≦ SOC _ cal2(SOC _ cal2 is calibrated, preferably 1% by way of example only, and not exclusive), the VCU coordinates the BMS, DCDC, first low-voltage battery charge monitor, and second low-voltage battery charge monitor to sleep and to count before sleep, repeating the above operations.
The control method corresponding to the working condition 4 is as follows:
the VCU controls the DCDC, the first low-voltage battery charge monitor, the second low-voltage battery charge monitor, and the BMS to be in an awake state all the time, the other controllers of the low-voltage system to sleep, and the switch S1 and the switch S2 to be turned off. The VCU controls the DCDC state to be always in an opening state, the voltage of the DCDC output end is controlled according to the ambient temperature and the charge state of the second low-voltage storage battery, table lookup is carried out according to the SOC2 of the second low-voltage storage battery to determine the voltage of the DCDC output end, and the voltage of the DCDC output end is shown in a table 5. Wherein the temperature T4 is preferably 0 ℃, non-unique value, for example only, the voltage U3 ranges from 14.5< U3<16, preferably 15V, non-unique value, for example only, U3 > U1 (U1 for the above condition 1).
Under different storage battery SOC of different temperature, real-time adjustment DCDC's output voltage can prevent the low voltage battery feed on the one hand, effectively guarantees the low voltage battery life-span, and on the other hand under the higher state of low voltage battery electric quantity, suitably reduces DCDC output voltage to reduce the power consumption of low voltage annex, reduce whole car power consumption, practice thrift the electric energy of charging.
TABLE 5
An embodiment of the present application further provides a control device of a power management system, and fig. 7 is a block diagram of a structure of the control device of the power management system, as shown in fig. 7, the control device includes: a receiving module 51, an obtaining module 52 and a control module 53. The receiving module 51 is configured to receive a power-off instruction of the target vehicle, where the power-off instruction is used to control the power management system to execute a preset power-off operation, and the preset power-off operation includes at least one of the following operations: the connection between the original low-voltage storage battery and the low-voltage accessory system is cut off, and the connection between the standby low-voltage storage battery and the low-voltage accessory system is cut off. The obtaining module 52 is used for obtaining the ambient temperature of the target vehicle, the electric quantity of the original low-voltage storage battery and the electric quantity of the standby low-voltage storage battery. The control module 53 is configured to generate a control instruction set in response to that the ambient temperature meets a preset condition, where the control instruction set is used to control the power management system to execute a power supplement policy, where the power supplement policy includes at least one of: and the power is supplemented for the standby low-voltage storage battery and the original low-voltage storage battery.
Embodiments of the present application further provide a storage medium having a computer program stored therein, wherein the computer program is configured to perform the steps in any of the above method embodiments when executed. Alternatively, in the present embodiment, the storage medium may be configured to store a computer program for executing the steps of: step S1: receiving a power-off instruction of a target vehicle, wherein the power-off instruction is used for controlling a power management system to execute preset power-off operation, and the preset power-off operation comprises at least one of the following operations: the connection between the original low-voltage storage battery and the low-voltage accessory system is cut off, and the connection between the standby low-voltage storage battery and the low-voltage accessory system is cut off. Step S2: and acquiring the ambient temperature of the target vehicle, the electric quantity of the original low-voltage storage battery and the electric quantity of the standby low-voltage storage battery. Step S3: responding to the condition that the environment temperature meets the preset condition, and generating a control instruction set, wherein the control instruction set is used for controlling a power management system to execute a power supply strategy, and the power supply strategy comprises at least one of the following: and the power is supplemented for the standby low-voltage storage battery and the original low-voltage storage battery.
Embodiments of the present application further provide a processor configured to run a computer program to perform the steps of any of the above method embodiments. Optionally, in this embodiment, the processor may be configured to execute the following steps by a computer program: step S1: receiving a power-off command of a target vehicle, wherein the power-off command is used for controlling a power management system to execute preset power-off operation, and the preset power-off operation comprises at least one of the following operations: the connection between the original low-voltage storage battery and the low-voltage accessory system is cut off, and the connection between the standby low-voltage storage battery and the low-voltage accessory system is cut off. Step S2: and acquiring the ambient temperature of the target vehicle, the electric quantity of the original low-voltage storage battery and the electric quantity of the standby low-voltage storage battery. Step S3: responding to the condition that the environment temperature meets the preset condition, and generating a control instruction set, wherein the control instruction set is used for controlling a power supply management system to execute a power supply strategy, and the power supply strategy comprises at least one of the following steps: and the power is supplemented for the standby low-voltage storage battery and the original low-voltage storage battery.
Embodiments of the present application further provide an electronic device, including a memory and a processor, where the memory stores a computer program, and the processor is configured to execute the computer program to perform the steps in any of the above method embodiments. Optionally, in this embodiment, the processor may be configured to execute the following steps by a computer program: step S1: receiving a power-off instruction of a target vehicle, wherein the power-off instruction is used for controlling a power management system to execute preset power-off operation, and the preset power-off operation comprises at least one of the following operations: the connection between the original low-voltage storage battery and the low-voltage accessory system is cut off, and the connection between the standby low-voltage storage battery and the low-voltage accessory system is cut off. Step S2: and acquiring the ambient temperature of the target vehicle, the electric quantity of the original low-voltage storage battery and the electric quantity of the standby low-voltage storage battery. Step S3: responding to the condition that the environment temperature meets the preset condition, and generating a control instruction set, wherein the control instruction set is used for controlling a power supply management system to execute a power supply strategy, and the power supply strategy comprises at least one of the following steps: and the power is supplemented for the standby low-voltage storage battery and the original low-voltage storage battery.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present invention, the description of each embodiment has its own emphasis, and reference may be made to the related description of other embodiments for parts that are not described in detail in a certain embodiment.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
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 can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A method for controlling a power management system, comprising:
receiving a power-off instruction of a target vehicle, wherein the power-off instruction is used for controlling a power management system to execute preset power-off operation, and the preset power-off operation comprises at least one of the following operations: cutting off the connection between the original low-voltage storage battery and the low-voltage accessory system and the connection between the standby low-voltage storage battery and the low-voltage accessory system;
acquiring the ambient temperature of the target vehicle, the electric quantity of the original low-voltage storage battery and the electric quantity of the standby low-voltage storage battery;
responding to the environment temperature meeting a preset condition, generating a control instruction set, wherein the control instruction set is used for controlling a power supply management system to execute a power supply strategy, and the power supply strategy comprises at least one of the following steps: and supplementing electricity for the standby low-voltage storage battery and supplementing electricity for the original low-voltage storage battery.
2. The control method according to claim 1, wherein in response to the ambient temperature satisfying a preset condition, a control instruction set is generated, and the control instruction set is used for controlling a power management system to execute a power compensation strategy, and includes:
under the condition that the ambient temperature meets a first preset condition, judging whether the power consumption of the original low-voltage storage battery is larger than a first power threshold value or not;
if so, generating a first target instruction in the control instruction set, wherein the first target instruction is used for controlling the power management system to supplement power for the standby low-voltage storage battery;
and after the standby low-voltage storage battery is fully charged, controlling the power management system to execute preset power-off operation.
3. The control method according to claim 2, characterized by further comprising:
and controlling the power management system to record the fault code of the original low-voltage storage battery under the condition that the power consumption of the original low-voltage storage battery is determined to be larger than the first power threshold.
4. The control method according to claim 1, wherein in response to the ambient temperature satisfying a preset condition, generating a control instruction set for controlling a power management system to execute a power supply compensation strategy, comprising:
under the condition that the ambient temperature meets a second preset condition, judging whether the power consumption of the original low-voltage storage battery is larger than a second power threshold value or not;
if not, judging whether the power consumption of the original low-voltage storage battery is larger than a third power threshold;
if yes, generating a second target instruction in the control instruction set, wherein the second target instruction is used for controlling the power management system to supplement power for the original low-voltage storage battery;
and after the original low-voltage storage battery is fully charged, controlling a power management system to execute preset power-off operation.
5. The control method according to any one of claims 1 to 4, wherein in response to the ambient temperature satisfying a preset condition, generating a control instruction set for controlling a power management system to execute a power supply compensation strategy comprises:
and awakening the power management system under the condition that the environmental temperature meets a preset condition so as to measure the power consumption of the original low-voltage storage battery.
6. The control method according to claim 1, wherein in response to the ambient temperature satisfying a preset condition, generating a control instruction set for controlling a power management system to execute a power supply compensation strategy, comprising:
in the electricity supplementing process, the voltage of the output end of a DCDC converter connected with the low-voltage storage battery to be charged is adjusted based on the battery electricity quantity of the low-voltage storage battery to be charged and the ambient temperature.
7. A control apparatus for a power management system, comprising:
the power supply management system comprises a receiving module, a power supply management module and a power supply management module, wherein the receiving module is used for receiving a high-voltage power-off instruction of a target vehicle, the power-off instruction is used for controlling the power supply management system to execute preset power-off operation, and the preset power-off operation comprises at least one of the following operations: cutting off the DCDC converter, the connection between the original low-voltage storage battery and the low-voltage accessory system, and the connection between the standby low-voltage storage battery and the low-voltage accessory system;
the acquisition module is used for acquiring the ambient temperature of the target vehicle and the electric quantity of the original low-voltage storage battery;
the control module is used for responding to the environment temperature meeting a preset condition and generating a control instruction set, and the control instruction set is used for controlling a power management system to execute a power supply strategy, wherein the power supply strategy comprises at least one of the following strategies: and supplementing electricity for the standby low-voltage storage battery and supplementing electricity for the original low-voltage storage battery.
8. A computer storage medium, comprising a stored program, wherein the program, when executed, controls an apparatus in which the computer storage medium is located to perform the control method of any one of claims 1 to 6.
9. A processor for running a program, the processor being arranged to run a computer program to perform the control method of any of claims 1-6.
10. An electronic device comprising a memory and a processor, wherein the memory has stored therein a computer program, and the processor is configured to execute the computer program to perform the control method according to any one of claims 1 to 6.
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