CN114834254A - 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
- 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
- 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
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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
- B60L2210/00—Converter types
- B60L2210/10—DC to DC converters
- B60L2210/12—Buck 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
- 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
- Y02T10/72—Electric energy management in electromobility
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Abstract
The invention discloses a control method and device of a power management system, a storage medium and a processor. Wherein, 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: controlling the first DCDC converter to be closed and controlling the second DCDC converter to be closed; acquiring the ambient temperature of a target vehicle and the power consumption of low-voltage storage batteries, wherein the number of the low-voltage storage batteries is at least two, and the at least two low-voltage storage batteries are arranged in parallel; detecting first working condition information of the low-voltage storage battery before power-off at this time, wherein the first working condition information comprises at least one of the following conditions: non-fault state, fault state; and generating a power supplementing command based on the environment temperature and the first working condition information of the low-voltage storage battery, wherein the power supplementing command is used for controlling a power management system to supplement power for the 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: controlling the first DCDC converter to be closed and controlling the second DCDC converter to be closed; acquiring the ambient temperature of a target vehicle and the power consumption of low-voltage storage batteries, wherein the number of the low-voltage storage batteries is at least two, and the at least two low-voltage storage batteries are arranged in parallel; detecting first working condition information of the low-voltage storage battery before power-off at this time, wherein the first working condition information comprises at least one of the following conditions: non-fault state, fault state; and generating a power supplementing command based on the environment temperature and the first working condition information of the low-voltage storage battery, wherein the power supplementing command is used for controlling the power management system to supplement power for the low-voltage storage battery.
Optionally, generating a power supplement instruction based on the ambient temperature and the first operating condition information of the low-voltage battery, including: under the condition that the ambient temperature meets a first preset condition and all the low-voltage storage batteries are in a non-fault state before power-off at this time, judging whether the average power consumption of all the low-voltage storage batteries is larger than a first power threshold value or not; if yes, detecting the current second operating condition information of all the low-voltage storage batteries, wherein the second operating condition information comprises at least one of the following conditions: non-fault state, fault state; on the basis of the second working condition information, the power supplementing instruction controls the power supply management system to supplement power for the low-voltage storage battery in the non-fault state at present; and after the low-voltage storage battery which is in a non-fault state at present is fully charged, controlling the power management system to execute preset power-off operation.
Optionally, generating a power supplement instruction based on the ambient temperature and the first operating condition information of the low-voltage battery, including: under the condition that the ambient temperature meets a second preset condition and only the first low-voltage storage battery is in a non-fault state before power-off at this time, judging whether the power consumption of the first low-voltage storage battery is larger than a second power threshold value or not; if not, judging whether the power consumption of the first low-voltage storage battery is larger than a third power threshold value; if so, the power supplementing instruction is used for controlling the power management system to supplement power for the first low-voltage storage battery; and after the first low-voltage storage battery is fully charged, controlling the power management system to execute preset power-off operation.
Optionally, generating a power supplement instruction based on the ambient temperature and the first operating condition information of the low-voltage battery, including: under the condition that the ambient temperature meets a third preset condition and only the second low-voltage storage battery is in a non-fault state before power-off at this time, judging whether the power consumption of the second low-voltage storage battery is greater than a fourth power threshold value; if yes, the power management system controls the high-voltage power battery to continuously keep a power-off state.
Optionally, generating a power supplement instruction based on the ambient temperature and the first operating condition information of the low-voltage battery, including: and under the condition that the ambient temperature meets the preset condition, waking up a monitoring system of the power management system to measure the power consumption of the low-voltage storage battery.
Optionally, generating a power supplement instruction based on the ambient temperature and the first operating condition information of the low-voltage battery, including: 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.
Optionally, a power-off instruction of the target vehicle is received, where the power-off instruction is used to control the power management system to perform a preset power-off operation, and includes: before the power-off, acquiring the fault conditions of the first DCDC converter and the second DCDC converter; when the power supply management system executes the power supplement instruction, only the DCDC converter without the fault is started.
According to an aspect of an embodiment of the present invention, there is provided a control apparatus of a power management system, including: the receiving module is used for receiving a 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: controlling the first DCDC converter to be closed and controlling the second DCDC converter to be closed; the acquisition module is used for acquiring the ambient temperature of the target vehicle and the power consumption of the low-voltage storage batteries, wherein the number of the low-voltage storage batteries is at least two, and the at least two low-voltage storage batteries are arranged in parallel; the detection module is used for detecting first working condition information of the low-voltage storage battery before power down, wherein the first working condition information comprises at least one of the following information: non-fault state, fault state; and the control module generates a power supplementing instruction based on the ambient temperature and the first working condition information of the low-voltage storage battery, wherein the power supplementing instruction is used for supplementing power for the low-voltage storage battery.
According to an aspect of the embodiments of the present invention, there is provided a computer storage medium including a stored program, wherein the program, when executed, controls an apparatus in which the computer storage medium is located to perform the method of any one of the above aspects.
According to an aspect of embodiments of the present invention, there is provided a processor for executing a program, the processor being arranged to execute a computer program to perform the method of any one of the above aspects.
In the embodiment of the invention, 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. And the fault condition of the DCDC converter and the fault condition of the low-voltage storage battery before the vehicle is powered off at this time are judged, and the restarting of a fault device is avoided.
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 without limiting 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 other sequences than those illustrated or 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.
In accordance with an embodiment of the present invention, there is provided an embodiment of a method for controlling a power management system, wherein the steps illustrated in the flowchart of the figure may be performed in a computer system, such as a set of computer-executable instructions, and wherein, although a logical order is illustrated in the flowchart, in some cases, the steps illustrated or described may be performed in an order different than that illustrated.
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 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 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.
In the present embodiment, a control method for operating in the power management system is provided, and fig. 2 is a flowchart of the control method for the power management system according to one embodiment of the present invention, 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: and controlling the first DCDC converter to be closed and controlling the second DCDC converter to be closed. Step S2: and acquiring the ambient temperature of the target vehicle and the power consumption of the low-voltage storage batteries, wherein the number of the low-voltage storage batteries is at least two, and the at least two low-voltage storage batteries are arranged in parallel. Step S3: detecting first working condition information of the low-voltage storage battery before power-off at this time, wherein the first working condition information comprises at least one of the following conditions: non-fault state, fault state. Step S4: and generating a power supplementing command based on the environment temperature and the first working condition information of the low-voltage storage battery, wherein the power supplementing command is used for controlling the power management system to supplement power for the low-voltage storage battery.
In the embodiment of the application, after the vehicle is powered off, the low-voltage storage battery is subjected to stage power supplementing 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. And the fault condition of the DCDC converter and the fault condition of the low-voltage storage battery before the vehicle is powered off at this time are judged, and the restarting of a fault device is avoided.
Optionally, in step S4, generating a power supplement instruction based on the ambient temperature and the first operating condition information of the low-voltage battery includes: and under the condition that the ambient temperature meets a first preset condition and all the low-voltage storage batteries are in a non-fault state before the power-off of the time, judging whether the average power consumption of all the low-voltage storage batteries is larger than a first power threshold value or not. If yes, detecting the current second operating condition information of all the low-voltage storage batteries, wherein the second operating condition information comprises at least one of the following conditions: non-fault state, fault state. And on the basis of the second working condition information, the power supplementing instruction controls the power supply management system to supplement power for the low-voltage storage battery which is in a non-fault state currently. And after the low-voltage storage battery which is in a non-fault state at present 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 step, when the ambient temperature is within a certain preset temperature range and the duration exceeds the corresponding preset duration, and when the average power consumption of all the low-voltage storage batteries is greater than the first power threshold, it indicates that at least one low-voltage storage battery has a fault. And carrying out secondary detection on all the low-voltage storage batteries, finding out the low-voltage storage battery with the current fault, and supplementing electricity to the low-voltage storage battery without the fault so as to ensure the next normal electrification.
Optionally, in step S4, generating a power supplement instruction based on the ambient temperature and the first operating condition information of the low-voltage battery includes: and under the condition that the ambient temperature meets a second preset condition and only the first low-voltage storage battery is in a non-fault state before the power-off of the current time, judging whether the power consumption of the first low-voltage storage battery is greater than a second power threshold value. And if not, judging whether the power consumption of the first low-voltage storage battery is larger than a third power threshold value. And if so, the power supplementing instruction is used for controlling the power management system to supplement power for the first low-voltage storage battery. And after the first 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 first low-voltage battery is less than or equal to the second power threshold, which indicates that the first low-voltage battery is not in fault and can be used normally. If the power consumption of the first low-voltage storage battery is larger than the third power threshold, the residual power of the first low-voltage storage battery is low, and power supplement is needed to avoid feeding.
Optionally, in step S4, generating a power supplement instruction based on the ambient temperature and the first operating condition information of the low-voltage battery includes: and under the condition that the ambient temperature meets a third preset condition and only the second low-voltage storage battery is in a non-fault state before the power-off of the current time, judging whether the power consumption of the second low-voltage storage battery is greater than a fourth power threshold. If yes, the power management system controls the high-voltage power battery to continuously keep a power-off state. The third 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 second low-voltage battery is greater than the second power threshold, which indicates a failure of the second low-voltage battery. When the second low-voltage storage battery is in fault, namely all the low-voltage storage batteries are in fault state, the high-voltage power battery can not be normally powered on, namely, the high-voltage power battery is continuously kept in power-off state to wait for maintenance.
Optionally, in step S4, generating a power supplement instruction based on the ambient temperature and the first operating condition information of the low-voltage battery includes: generating a power supplementing command based on the ambient temperature and the first working condition information of the low-voltage storage battery, and comprising the following steps of: and under the condition that the ambient temperature meets the preset condition, waking up a monitoring system of the power management system to measure the power consumption of the 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 S4, generating a power supplement instruction based on the ambient temperature and the first operating condition information of the low-voltage battery 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, the output terminal voltage of the DCDC converter is adjusted according to the battery capacity of the low-voltage 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.
Optionally, in step 1, a power-off command of the target vehicle is received, where the power-off command is used to control the power management system to perform a preset power-off operation, and the method includes: before the power-off, the fault conditions of the first DCDC converter and the second DCDC converter are obtained. When the power supply management system executes the power supplement instruction, only the DCDC converter without the fault is started.
In the above steps, a first DCDC converter and a second DCDC converter are provided, and when one of the first DCDC converter and the second DCDC converter fails, the other DCDC converter can be used as a standby DCDC converter to ensure that the high-voltage power battery is normally powered up.
An embodiment of the present application further provides a circuit schematic diagram of a power management system, as shown in fig. 3, including: the vehicle-mounted charging system comprises a high-voltage power battery, a first DCDC converter (hereinafter referred to as DCDC1), a first DCDC converter (hereinafter referred to as DCDC2), a first low-voltage storage battery, a second low-voltage storage battery, a vehicle-mounted charger, 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. The first low-voltage storage battery and the second low-voltage storage battery are arranged in parallel and provide electric energy for 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, DCDC1, DCDC2, 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 DCDC1 and the DCDC2 can transmit their own open/close states to the VCU, and can be opened or closed by receiving an open/close command from the VCU, and when the DCDC1 or the DCDC2 is opened, the electric energy of the high-voltage power battery can be transmitted to the low-voltage battery, the low-voltage accessory system, the VCU, and the like, and after the DCDC1 and the DCDC2 are closed, the high-voltage power battery cannot supply electric power to the low-voltage battery, the low-voltage accessory system, and the VCU. The VCU can control the on or off of DCDC1 and DCDC2, and also can control DCDC1 and DCDC2 to carry out output voltage control, can send instructions to the BMS to control the power-on or power-off of the high-voltage power battery, can comprehensively coordinate and control the sleep and wake-up of all controllers of the whole vehicle network, when a certain controller is in a wake-up state, the controller can normally work, send or receive related signals and carry out operation, the power consumption is high, when a certain controller is in a sleep state, the power consumption is low, only static current of sleep exists, and meanwhile, the controller 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:
the whole vehicle network is in an awakening state, and the VCU does not perform dormancy control. The states of DCDC1 and DCDC2 were controlled as shown in table 2. The output voltages of DCDC1 and DCDC2 were controlled as shown in table 3. 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.
Under different storage battery SOC of different temperatures, real-time adjustment DCDC's output terminal 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 terminal voltage to reduce the power consumption of low voltage annex, reduce whole car power consumption, promote continuation of the journey mileage.
TABLE 2
TABLE 3
The control method corresponding to the working condition 2 is as follows:
the entire vehicle network is in the wake-up state, the VCU does not perform sleep control, and the states of DCDC1 and DCDC2 are controlled, as shown in table 4. The output voltages of DCDC1 and DCDC2 were controlled as shown in table 5. 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 for the above-described operating 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 4
TABLE 5
As shown in FIG. 5, the control method corresponding to the working condition 3 is as follows:
the VCU controls the DCDC1 and the DCDC2 to be turned off, and sends a command to the BMS to control the internal relay of the high-voltage power battery to be turned off, the high-voltage power battery is powered off, the VCU comprehensively coordinates the whole vehicle network to sleep, the SOC (the SOC4) and the ambient temperature Tx of the first low-voltage storage battery and the second low-voltage storage battery are recorded before the sleep, then the sleep is started from the whole vehicle network for timing, and when the ambient temperature Tx is larger than T3(T3 is preferably 0 ℃, a non-unique value is merely taken as 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 when the timing time exceeds a certain time T1 (preferably 3h, the example is taken as an example, the non-unique value).
The VCU controls the on/off of the DCDCs according to the states of the two DCDCs, and determines the states of the two low-voltage batteries and the SOCs of the two low-voltage batteries (the SOCs in this case are simply referred to as SOCx). SOC4 denotes the average of SOC of the two batteries before the above-mentioned sleep if neither of the two low-voltage batteries has failed, SOCx denotes the average of SOC of the two batteries after the above-mentioned wake-up for a while, SOC4 denotes the SOC of the above-mentioned battery without failure (time before sleep) and SOCx denotes the SOC of the battery without failure (time after wake-up for a while) if one of the two low-voltage batteries has a failure.
If SOC4-SOCx > SOC _ cal1(SOC _ cal1 is a calibrated value, preferably 5%, by way of example only, and not a unique value), the low-voltage power consumption of the whole vehicle is considered to be abnormal, the VCU reports the low-voltage power consumption abnormal fault, records a fault code, and sends the fault to the instrument for prompting when the driver turns on the starting switch to start the vehicle next time. And meanwhile, the VCU sends a command to the BMS, starts an internal relay of the high-voltage power battery to electrify at high voltage, charges the low-voltage storage battery (one or two batteries without faults) by the high-voltage power battery, starts to control the DCDC1 and the DCDC2 to be closed after the high-voltage power battery is fully charged, sends a command to the BMS to control the internal relay of the high-voltage power battery to be disconnected, and electrifys the high-voltage power battery, and comprehensively coordinates the BMS, the DCDC1, the DCDC2, the first low-voltage storage battery electric quantity monitor and the second low-voltage storage battery electric quantity monitor to sleep, and times before the sleep and repeats the operations.
If SOC4-SOCx is less than or equal to SOC _ cal1(SOC _ cal1 is calibrated, preferably 5%, for example only, not the only value), then the low-voltage power consumption of the whole vehicle is not considered to be abnormal.
If SOC _ cal2 is more than SOC4-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-up, the high-voltage power battery charges the low-voltage storage battery (one or two batteries without faults), after the battery is fully charged, the VCU starts to control DCDC1 and DCDC2 to be turned off, and sends a command to the BMS to control the internal relay of the high-voltage power battery to be turned off, the high-voltage power battery is powered down, the VCU comprehensively coordinates the BMS, the DCDC1 and DCDC2, the first low-voltage storage battery charge monitor and the second low-voltage storage battery charge monitor to carry out dormancy, and the operations are repeated before the dormancy is timed.
If SOC1-SOCx ≦ SOC _ cal2(SOC _ cal2 is calibrated, preferably 1%, by way of example only, and not by way of limitation), the VCU begins to control DCDC1 and DCDC2 to shut down, the VCU comprehensively coordinates BMS, DCDC1, DCDC2, the two low-voltage battery charge monitors to sleep, and clocks before sleep, and repeats the above operations.
The control method corresponding to the working condition 4 is as follows:
the states of DCDC1 and DCDC2 are controlled as shown in fig. 6. The output voltages of DCDC1 and DCDC2 were controlled as shown in table 5. The temperature T4 is preferably 0 ℃, a non-unique value, by way of example only, and the voltage U3 ranges from 14.5< U3<16, preferably 15V, and a non-unique value, by way of example only, U3 > U1 (U1 for the above-described operating condition 1).
Under different temperatures and different storage battery SOC, the output end voltage of the DCDC is adjusted in real time, so that on one hand, the low-voltage storage battery can be prevented from feeding, the service life of the low-voltage storage battery is effectively ensured, and on the other hand, under the condition that the electric quantity of the low-voltage storage battery is higher, the output end voltage of the DCDC 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; when one DCDC breaks down, the standby DCDC is utilized in time, the electric quantity of the low-voltage storage battery is effectively guaranteed, and feeding is prevented.
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, a detecting module 53 and a control module 54. 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: and controlling the first DCDC converter to be closed and controlling the second DCDC converter to be closed. The obtaining module 52 is configured to obtain an ambient temperature of the target vehicle and a power consumption of the low-voltage batteries, where the number of the low-voltage batteries is at least two, and the at least two low-voltage batteries are arranged in parallel. The detection module 53 is configured to detect first operating condition information of the low-voltage battery before powering down at this time, where the first operating condition information includes at least one of the following: non-fault state, fault state. The control module 54 is configured to generate a power supplement instruction based on the ambient temperature and the first operating condition information of the low-voltage battery, where the power supplement instruction is used to control the power management system to supplement power for the low-voltage 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: and controlling the first DCDC converter to be closed and controlling the second DCDC converter to be closed. Step S2: the method comprises the steps of obtaining the ambient temperature of a target vehicle and the power consumption of low-voltage storage batteries, wherein the number of the low-voltage storage batteries is at least two, and the low-voltage storage batteries are arranged in parallel. Step S3: detecting first working condition information of the low-voltage storage battery before power-off at this time, wherein the first working condition information comprises at least one of the following conditions: non-fault state, fault state. Step S4: and generating a power supplementing command based on the environment temperature and the first working condition information of the low-voltage storage battery, wherein the power supplementing command is used for controlling the power management system to supplement power for the 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 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: and controlling the first DCDC converter to be closed and controlling the second DCDC converter to be closed. Step S2: the method comprises the steps of obtaining the ambient temperature of a target vehicle and the power consumption of low-voltage storage batteries, wherein the number of the low-voltage storage batteries is at least two, and the low-voltage storage batteries are arranged in parallel. Step S3: detecting first working condition information of the low-voltage storage battery before power-off at this time, wherein the first working condition information comprises at least one of the following conditions: non-fault state, fault state. Step S4: and generating a power supplementing command based on the environment temperature and the first working condition information of the low-voltage storage battery, wherein the power supplementing command is used for controlling the power management system to supplement power for the low-voltage storage battery.
Embodiments of the present application further provide an electronic device, comprising a memory and a processor, wherein 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: and controlling the first DCDC converter to be closed and controlling the second DCDC converter to be closed. Step S2: the method comprises the steps of obtaining the ambient temperature of a target vehicle and the power consumption of low-voltage storage batteries, wherein the number of the low-voltage storage batteries is at least two, and the low-voltage storage batteries are arranged in parallel. Step S3: detecting first working condition information of the low-voltage storage battery before power-off at this time, wherein the first working condition information comprises at least one of the following conditions: non-fault state, fault state. Step S4: and generating a power supplementing command based on the environment temperature and the first working condition information of the low-voltage storage battery, wherein the power supplementing command is used for controlling the power management system to supplement power for the 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 descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technical content can be implemented in other manners. 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: controlling the first DCDC converter to be closed and controlling the second DCDC converter to be closed;
acquiring the ambient temperature of a target vehicle and the power consumption of low-voltage storage batteries, wherein the number of the low-voltage storage batteries is at least two, and the low-voltage storage batteries are arranged in parallel;
detecting first working condition information of the low-voltage storage battery before power-off at this time, wherein the first working condition information comprises at least one of the following conditions: non-fault state, fault state;
and generating a power supplementing instruction based on the environment temperature and the first working condition information of the low-voltage storage battery, wherein the power supplementing instruction is used for controlling a power management system to supplement power for the low-voltage storage battery.
2. The control method according to claim 1, wherein generating a power replenishment command based on the ambient temperature and first operating condition information of the low-voltage battery comprises:
under the condition that the environment temperature meets a first preset condition and all the low-voltage storage batteries are in a non-fault state before power-off at this time, judging whether the average power consumption of all the low-voltage storage batteries is larger than a first power threshold value or not;
if yes, detecting the current second operating condition information of all the low-voltage storage batteries, wherein the second operating condition information comprises at least one of the following conditions: non-fault state, fault state;
based on the second working condition information, the power supplementing instruction controls the power management system to supplement power for the low-voltage storage battery in a non-fault state at present;
and after the low-voltage storage battery which is in a non-fault state at present is fully charged, controlling the power management system to execute preset power-off operation.
3. The control method according to claim 1, wherein generating a power replenishment command based on the ambient temperature and first operating condition information of the low-voltage battery comprises:
under the condition that the environment temperature meets a second preset condition and only a first low-voltage storage battery is in a non-fault state before power-off at this time, judging whether the power consumption of the first low-voltage storage battery is larger than a second power threshold value or not;
if not, judging whether the power consumption of the first low-voltage storage battery is larger than a third power threshold value;
if so, the power supplementing instruction is used for controlling the power management system to supplement power for the first low-voltage storage battery;
and after the first low-voltage storage battery is fully charged, controlling a power management system to execute preset power-off operation.
4. The control method according to claim 1, wherein generating a power replenishment command based on the ambient temperature and first operating condition information of the low-voltage battery comprises:
under the condition that the environment temperature meets a third preset condition and only a second low-voltage storage battery is in a non-fault state before power-off at this time, judging whether the power consumption of the second low-voltage storage battery is larger than a fourth power threshold value or not;
if yes, the power management system controls the high-voltage power battery to continuously keep a power-off state.
5. The control method according to claim 1, wherein generating a power replenishment command based on the ambient temperature and first operating condition information of the low-voltage battery comprises:
and awakening a monitoring system of the power management system under the condition that the ambient temperature meets a preset condition so as to measure the power consumption of the low-voltage storage battery.
6. The control method according to claim 1, wherein generating a power replenishment command based on the ambient temperature and first operating condition information of the low-voltage battery comprises:
in the electricity supplementing process, the output end voltage of a DCDC converter connected with a 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. The control method according to claim 1, wherein a power-down instruction of a target vehicle is received, wherein the power-down instruction is used for controlling a power management system to perform a preset power-down operation, and comprises:
before the power-off, acquiring the fault conditions of the first DCDC converter and the second DCDC converter;
and when the power supply management system executes a power supplement instruction, only the DCDC converter without the fault is started.
8. A control apparatus for a power management system, comprising:
the power-off control system comprises a receiving module, a power-off instruction and a control module, wherein the receiving module is used for receiving a power-off instruction of a target vehicle, 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: controlling the first DCDC converter to be closed and controlling the second DCDC converter to be closed;
the system comprises an acquisition module, a storage module and a control module, wherein the acquisition module is used for acquiring the ambient temperature of a target vehicle and the power consumption of low-voltage storage batteries, the number of the low-voltage storage batteries is at least two, and the at least two low-voltage storage batteries are arranged in parallel;
the detection module is used for detecting first working condition information of the low-voltage storage battery before power-off at this time, wherein the first working condition information comprises at least one of the following information: non-fault state, fault state;
the control module generates a power supplementing instruction based on the environment temperature and the first working condition information of the low-voltage storage battery, wherein the power supplementing instruction is used for supplementing power for the low-voltage storage battery.
9. A computer storage medium, comprising a stored program, wherein the program, when executed, controls an apparatus in which the computer storage medium resides to perform the method of any one of claims 1-7.
10. A processor for running a program, the processor being arranged to run a computer program to perform the method of any of claims 1-7.
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| PCT/CN2023/094888 WO2023236747A1 (en) | 2022-06-06 | 2023-05-17 | Power management system control method and apparatus, storage medium, and processor |
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