CN113386626A - Power control method and device based on battery power change rate and vehicle control unit - Google Patents
Power control method and device based on battery power change rate and vehicle control unit 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
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
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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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/10—Vehicle control parameters
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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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Electric Propulsion And Braking For Vehicles (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a power control method, a power control device and a vehicle control unit based on battery power change rate, which relate to the technical field of power batteries and comprise the steps of acquiring the total required power of a current vehicle, the maximum discharge power of the power battery at the current moment, the actual discharge power and the maximum discharge power of the battery at the last moment in real time; when the variation between the maximum discharge power of the battery at the previous moment and the maximum discharge power at the current moment exceeds a power variation threshold, determining the limited power of the current vehicle according to the comparison condition of the total required power and the maximum discharge power at the current moment; and controlling the actual discharge power based on the limit power so that the actual discharge power is smaller than the maximum discharge power at the current moment, adjusting the limit power through the change rate of the battery power, ensuring that the actual discharge power does not exceed the maximum discharge power limit under the control of the limit power, and ensuring the safety of the battery and the vehicle.
Description
Technical Field
The invention relates to the technical field of power batteries, in particular to a power control method and device based on battery power change rate and a vehicle control unit.
Background
The power battery provides energy for each part of the electric automobile, however, the discharge power of the power battery is affected by the operating environment, the current state of the battery and the like. And the actual total load running power of the automobile should not exceed the maximum discharge power of the battery, otherwise, the battery is damaged, and the service life of the battery is reduced. Therefore, it is necessary to exert the battery performance to the maximum extent, and at the same time, reasonably use the battery discharge power, protect the battery, and maintain the stable operation of the automobile.
Currently, the actual power of the total load is generally controlled so that it does not exceed the maximum discharge power of the battery, but there is still a risk of damaging the battery because of the delay in control.
Disclosure of Invention
The invention aims to provide a power control method and device based on a battery power change rate and a vehicle control unit.
In a first aspect, an embodiment of the present invention provides a power control method based on a battery power change rate, where the method includes:
acquiring the total required power of the current vehicle, the current-time maximum discharge power of the power battery, the actual discharge power and the last-time maximum discharge power of the battery in real time;
when the variation between the maximum discharge power of the battery at the previous moment and the maximum discharge power at the current moment exceeds a power variation threshold, determining the limited power of the current vehicle according to the comparison condition of the total required power and the maximum discharge power at the current moment;
and controlling the actual discharge power based on the limit power so that the actual discharge power is smaller than the maximum discharge power at the current moment.
With reference to the first aspect, an embodiment of the present invention provides a first possible implementation manner of the first aspect, where when a variation between a maximum discharge power of a battery at a previous time and a maximum discharge power at a current time exceeds a power variation threshold, the step of determining a power limit of the current vehicle according to a comparison between the total required power and the maximum discharge power at the current time includes:
and when the maximum discharge power of the battery at the last moment is smaller than the maximum discharge power at the current moment, and the variation between the maximum discharge power of the battery at the last moment and the maximum discharge power at the current moment exceeds a power variation threshold, if the total required power is larger than the maximum discharge power at the current moment, the limited power is increased according to a preset increasing variation rate.
With reference to the first aspect, an embodiment of the present invention provides a second possible implementation manner of the first aspect, where when a variation between a maximum discharge power of a battery at a previous time and a maximum discharge power at a current time exceeds a power variation threshold, the step of determining a power limit of the current vehicle according to a comparison between the total required power and the maximum discharge power at the current time includes:
and when the maximum discharge power of the battery at the last moment is smaller than the maximum discharge power at the current moment, and the variation between the maximum discharge power of the battery at the last moment and the maximum discharge power at the current moment exceeds a power variation threshold, if the total required power is smaller than the maximum discharge power at the current moment, the limiting power is increased according to a second preset increasing change rate.
With reference to the first aspect, an embodiment of the present invention provides a third possible implementation manner of the first aspect, where the first preset rising rate is smaller than the second preset rising rate.
With reference to the first aspect, an embodiment of the present invention provides a fourth possible implementation manner of the first aspect, where when a variation between a maximum discharge power of a battery at a previous time and a maximum discharge power at a current time exceeds a power variation threshold, the step of determining a power limit of the current vehicle according to a comparison between the total required power and the maximum discharge power at the current time includes:
and when the maximum discharge power of the battery at the last moment is larger than the maximum discharge power at the current moment, and the variation of the maximum discharge power of the battery at the last moment and the maximum discharge power at the current moment exceeds a power threshold, if the total required power is larger than the maximum discharge power at the current moment, reducing the limit power based on a preset reduction change rate.
With reference to the first aspect, an embodiment of the present invention provides a fifth possible implementation manner of the first aspect, where the method further includes:
and if the total required power is greater than the maximum discharge power at the current moment, sending a reminding signal to a reminding terminal, wherein the reminding signal comprises a prompt that the maximum discharge power of the battery is limited.
With reference to the first aspect, an embodiment of the present invention provides a sixth possible implementation manner of the first aspect, where the step of controlling the actual discharge power according to the limit power so that the actual discharge power is smaller than the maximum discharge power at the current time includes:
carrying out proportional-integral linear adjustment on the first limiting power to obtain a second limiting power;
and controlling the actual discharging power according to the second limit power until the actual discharging power does not exceed the first limit power.
In a second aspect, an embodiment of the present invention further provides a power control apparatus based on a battery power change rate, where the apparatus includes:
the acquisition module is used for acquiring the total required power of the current vehicle, the current-time maximum discharge power of the power battery, the actual discharge power and the last-time maximum discharge power of the battery in real time;
the determining module is used for determining the limited power of the current vehicle according to the comparison condition of the total required power and the maximum discharging power at the current moment when the variation between the maximum discharging power of the battery at the previous moment and the maximum discharging power at the current moment exceeds a power variation threshold;
and the control module is used for controlling the actual discharging power based on the limiting power so as to enable the actual discharging power to be smaller than the maximum discharging power at the current moment.
In a third aspect, an embodiment provides an electronic device, including a memory and a processor, where the memory stores a computer program operable on the processor, and the processor implements the steps of the method described in any one of the foregoing embodiments when executing the computer program.
In a fourth aspect, embodiments provide a machine-readable storage medium having stored thereon machine-executable instructions that, when invoked and executed by a processor, cause the processor to carry out the steps of the method of any preceding embodiment.
The embodiment of the invention provides a power control method and device based on battery power change rate and a vehicle control unit, when the change rate of the maximum discharge power of a battery exceeds a power change rate threshold value, the limit power is adjusted according to the comparison condition of the maximum discharge power and the total required power at the current moment, and the actual discharge power is adjusted based on the limit power, so that the actual discharge power is not beyond the maximum discharge power limit under the control of the limit power, and the safety of the battery and a vehicle is ensured.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a flowchart of a power control method based on a battery power change rate according to an embodiment of the present invention;
FIG. 2 is a flow chart of another method for controlling power based on a rate of change of battery power according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of power versus time according to an embodiment of the present invention;
FIG. 4 is a functional block diagram of a power control apparatus based on a battery power change rate according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a hardware architecture of an electronic device according to an embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. 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.
Battery life is currently guaranteed by controlling the actual power of the power cell so that it does not exceed the maximum discharge power of the battery, but the battery still risks being lossy. In an actual application scenario, for example, although the actual power is controlled to be reduced at this time, due to the measurement delay, the control accuracy and other reasons, the actual power still has a risk of exceeding the maximum power, and is continuously increased for a period of time, and further the actual power has a risk of exceeding the maximum discharge power during the period of time, so that the service life of the battery is reduced.
Based on this, the power control method and device based on the battery power change rate and the vehicle control unit provided by the embodiment of the invention adjust the limited power through the battery power change rate, ensure that the actual discharge power does not exceed the maximum discharge power limit under the control of the limited power, and ensure the safety of the battery and the vehicle.
For the convenience of understanding the embodiment, a detailed description will be given to a power control method based on a battery power change rate, which is applicable to a vehicle controller of a vehicle.
Fig. 1 is a flowchart of a power control method based on a battery power change rate according to an embodiment of the present invention.
Referring to fig. 1, the method includes the steps of:
and S102, acquiring the total required power of the current vehicle, the current-time maximum discharge power of the power battery, the actual discharge power and the last-time maximum discharge power of the battery in real time.
Wherein, the total required power refers to the power requirement required by the vehicle to perform the corresponding functional operation. The maximum discharge Power Max is the maximum discharge Power that can be discharged based on the performance, application environment, and operating conditions of the current battery. The Actual discharge Power Actual is the discharge Power value actually released by the current battery under the control of the vehicle control unit.
And step S104, when the variation between the maximum discharge power of the battery at the previous moment and the maximum discharge power at the current moment exceeds a power variation threshold, determining the limited power of the current vehicle according to the comparison condition of the total required power and the maximum discharge power at the current moment.
Wherein the Power limit Max Offset is smaller than the maximum discharge Power and larger than the actual discharge Power.
And step S106, controlling the actual discharging power based on the limiting power so that the actual discharging power is smaller than the maximum discharging power at the current moment.
Illustratively, the actual discharge power is limited with a limit power slightly smaller than the maximum discharge power so that the actual discharge power does not exceed the first limit power, and the actual discharge power is ensured not to exceed the maximum discharge power larger than the limit power.
In a preferred embodiment of practical application, when the change rate of the maximum discharge power of the battery exceeds the power change rate threshold, the limit power is adjusted according to the comparison condition between the maximum discharge power at the current moment and the total required power, and then the actual discharge power is adjusted based on the limit power, so that the actual discharge power is not beyond the limit of the maximum discharge power under the control of the limit power, and the safety of the battery and the vehicle is ensured.
In some embodiments, the limiting power may be adjusted according to different discharge power variation conditions at front and rear moments, so as to ensure that the actual discharge power under each condition does not exceed the maximum discharge power, and improve the battery life, and step S104 further includes:
step 1.1), when the maximum discharge power of the battery at the last moment is smaller than the maximum discharge power at the current moment, and the variation between the maximum discharge power of the battery at the last moment and the maximum discharge power at the current moment exceeds a power variation threshold, if the total required power is larger than the maximum discharge power at the current moment, the limited power is increased according to a first preset increasing change rate. When the maximum discharge power meets the requirement, namely when the maximum discharge power of the battery at the last moment is smaller than the maximum discharge power at the current moment, and the variation between the maximum discharge power of the battery at the last moment and the maximum discharge power at the current moment exceeds a power variation threshold, if the total required power is smaller than the maximum discharge power at the current moment, the limiting power is directly increased according to a second preset increasing rate; when the maximum discharge power step rises and the maximum discharge power does not meet the requirement, the limiting power is slowly raised.
The method comprises the steps of presetting an ascending change rate and a descending change rate of limiting power, wherein the ascending change rate comprises a first preset ascending change rate and a second preset ascending change rate, the first preset ascending change rate is smaller than the second preset ascending change rate, and the limiting power is used for controlling the actual discharging power to be smaller than the maximum discharging power at the current moment.
As an alternative embodiment, as shown in fig. 3, for the power variation before and after the vertical rising curve, it may be understood that the maximum discharging power of the battery at the last time is smaller than the maximum discharging power at the current time, and the variation between the maximum discharging power of the battery at the last time and the maximum discharging power at the current time exceeds the power variation threshold. At the moment, if the total required power is smaller than the maximum discharge power at the current moment, namely the discharge power at the moment can meet the total required power of a vehicle driver, the limiting power is improved according to a second preset rising change rate, and the discharge power is quickly recovered; and if the total required power is larger than the maximum discharge power at the current moment, namely the discharge power at the moment cannot meet the total required power of a vehicle driver, improving the limited power according to a first preset rising change rate.
Illustratively, when the current discharging power does not meet the power demand of the driver, and when the discharging power needs to be recovered, the preset rising change rate is reduced, the limiting power is increased to a lower degree, the discharging power is slowly recovered, and unexpected acceleration is prevented, as shown in fig. 3, the rising slope of the limiting power is relatively gentle relative to the vertical rising slope.
On the basis of the foregoing embodiment, step S104 further includes:
step 1.2), when the maximum discharge power of the battery at the last moment is larger than the maximum discharge power at the current moment, and the variation of the maximum discharge power of the battery at the last moment and the maximum discharge power at the current moment exceeds a power threshold, if the total required power is larger than the maximum discharge power at the current moment, the limited power is reduced based on a preset reduction change rate.
For example, as shown in fig. 3, in this case, for the power variation before and after the vertical downward curve, it may be understood that the maximum discharge power of the battery at the last time is greater than the maximum discharge power at the current time, and the variation between the maximum discharge power of the battery at the last time and the maximum discharge power at the current time exceeds the power threshold.
In some embodiments, in order to make the user aware of the current discharging condition of the vehicle battery, the method further comprises:
and 2.1) if the total required power is larger than the maximum discharge power at the current moment, sending a reminding signal to a reminding terminal, wherein the reminding signal comprises a prompt that the maximum discharge power of the battery is limited, so that a user can know the current vehicle condition and take corresponding measures.
In some embodiments, the determining the first limiting power according to the above embodiments may be optimized to make the control of the actual discharging power more accurate, and the step S106 further includes the following steps:
and 3.1) carrying out proportional-integral-linear PID (proportional-integral-derivative) adjustment on the first limiting power to obtain a second limiting power.
And the actual discharge power does not exceed the first limit power, the PID control is carried out on the first limit power, the second limit power is output to the power using module for use, the discharge power consumed by the power using module in control does not exceed the second limit power, and the actual discharge power does not exceed the first limit power.
And 3.2) controlling the actual discharging power according to the second limiting power until the actual discharging power does not exceed the first limiting power.
It should be noted that, in the embodiment of the present invention, the first limit power smaller than the maximum discharge power is used as the control target line, and the first limit power curve Offset is dynamically adjusted, so that the actual discharge power can be effectively prevented from exceeding the limit (exceeding the first limit power curve), and when the actual discharge power is about to exceed the limit, the PID is used to quickly and effectively control the actual discharge power within the battery capacity range.
Fig. 2 is a flowchart of another power control method based on a battery power change rate according to an embodiment of the present invention, and referring to fig. 2, the method specifically includes the following steps:
step S202, acquiring a total power requirement PowerReq, an actual generating power REPower of the range-extending system and a current maximum battery discharging power PowerMax, and the maximum battery discharging power PowerMaxPrep at the last moment;
step S204, presetting a rising change rate increatelimit as L1, and presetting a falling change rate DECRateLimit as L2;
step S206, presetting Delta1 as PowerReq-report-PowerMax, wherein Delta1 is the difference value between the total power demand and the actual generated power as well as the current battery discharge power;
step S208, judging whether the sum of the current actual power generation power and the current battery discharge power meets the total power requirement and whether the sum is in a maximum discharge power increasing stage;
if yes, the preset ascending rate of change is ascending rate of change L11, and then step S214 is executed; if not, directly executing step S214;
step S210, presetting Delta2 as PowerMaxPre-PowerMax, where Delta2 is a difference between the discharge power at the previous time and the discharge power at the current time;
step S212, judging whether the total power demand is greater than the sum of the current actual power generation power and the current battery discharge power, and whether the rising change rate of the maximum discharge power is greater than a threshold value;
if yes, requesting the HMI module to remind the driver that the battery power is limited, and then executing the step S214; if not, go to step S214.
In step S214, the limit power PowerMaxOffset is adjusted according to the limits of the increasing change rate INCRateLimit and the decreasing change rate DECRateLimit.
As shown in fig. 4, an embodiment of the present invention provides a power control apparatus based on a battery power change rate, including:
the acquisition module is used for acquiring the total required power of the current vehicle, the current-time maximum discharge power of the power battery, the actual discharge power and the last-time maximum discharge power of the battery in real time;
the determining module is used for determining the limited power of the current vehicle according to the comparison condition of the total required power and the maximum discharging power at the current moment when the variation between the maximum discharging power of the battery at the previous moment and the maximum discharging power at the current moment exceeds a power variation threshold;
and the control module is used for controlling the actual discharging power based on the limiting power so as to enable the actual discharging power to be smaller than the maximum discharging power at the current moment.
In some embodiments, the determining module is further configured to, when the maximum discharging power of the battery at the previous time is smaller than the maximum discharging power at the current time and a variation between the maximum discharging power of the battery at the previous time and the maximum discharging power at the current time exceeds a power variation threshold, increase the limit power according to a preset increasing variation rate if the total required power is greater than the maximum discharging power at the current time.
In some embodiments, the determining module is further configured to, when the maximum discharging power of the battery at the previous time is smaller than the maximum discharging power at the current time and a variation between the maximum discharging power of the battery at the previous time and the maximum discharging power at the current time exceeds a power variation threshold, increase the limiting power according to a second preset increasing rate if the total required power is smaller than the maximum discharging power at the current time.
In some embodiments, the first predetermined rate of change of rise is less than the second predetermined rate of change of rise.
In some embodiments, the determining module is further configured to, when the maximum discharging power of the battery at the previous time is greater than the maximum discharging power at the current time and a variation between the maximum discharging power of the battery at the previous time and the maximum discharging power at the current time exceeds a power threshold, reduce the limit power based on a preset reduction rate if the total required power is greater than the maximum discharging power at the current time.
In some embodiments, the apparatus further includes a reminding module configured to send a reminding signal to a reminding terminal if the total required power is greater than the maximum discharge power at the current time, where the reminding signal includes a prompt that the maximum discharge power of the battery is limited.
In some embodiments, the control module is further configured to perform proportional-integral-linear adjustment on the first limiting power to obtain a second limiting power; and controlling the actual discharging power according to the second limit power until the actual discharging power does not exceed the first limit power.
In this embodiment, the electronic device may be, but is not limited to, a Computer device with analysis and processing capabilities, such as a Personal Computer (PC), a notebook Computer, a monitoring device, and a server.
As an exemplary embodiment, referring to fig. 5, the electronic device 110 includes a communication interface 111, a processor 112, a memory 113, and a bus 114, wherein the processor 112, the communication interface 111, and the memory 113 are connected by the bus 114; the memory 113 is used for storing a computer program for supporting the processor 112 to execute the image sharpening method, and the processor 112 is configured to execute the program stored in the memory 113.
A machine-readable storage medium as referred to herein may be any electronic, magnetic, optical, or other physical storage device that can contain or store information such as executable instructions, data, and the like. For example, the machine-readable storage medium may be: a RAM (random Access Memory), a volatile Memory, a non-volatile Memory, a flash Memory, a storage drive (e.g., a hard drive), any type of storage disk (e.g., an optical disk, a dvd, etc.), or similar storage medium, or a combination thereof.
The non-volatile medium may be non-volatile memory, flash memory, a storage drive (e.g., a hard drive), any type of storage disk (e.g., an optical disk, dvd, etc.), or similar non-volatile storage medium, or a combination thereof.
It can be understood that, for the specific operation method of each functional module in this embodiment, reference may be made to the detailed description of the corresponding step in the foregoing method embodiment, and no repeated description is provided herein.
The computer-readable storage medium provided in the embodiments of the present invention stores a computer program, and when executed, the computer program code may implement the method described in any of the above embodiments, and for specific implementation, reference may be made to the method embodiment, which is not described herein again.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the system and the apparatus described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein.
Claims (10)
1. A method for power control based on a rate of change of battery power, the method comprising:
acquiring the total required power of the current vehicle, the current-time maximum discharge power of the power battery, the actual discharge power and the last-time maximum discharge power of the battery in real time;
when the variation between the maximum discharge power of the battery at the previous moment and the maximum discharge power at the current moment exceeds a power variation threshold, determining the limited power of the current vehicle according to the comparison condition of the total required power and the maximum discharge power at the current moment;
and controlling the actual discharge power based on the limit power so that the actual discharge power is smaller than the maximum discharge power at the current moment.
2. The method according to claim 1, wherein the step of determining the limited power of the current vehicle according to the comparison between the total required power and the maximum discharge power at the current time when the variation between the maximum discharge power of the battery at the previous time and the maximum discharge power at the current time exceeds a power variation threshold comprises:
and when the maximum discharge power of the battery at the last moment is smaller than the maximum discharge power at the current moment, and the variation between the maximum discharge power of the battery at the last moment and the maximum discharge power at the current moment exceeds a power variation threshold, if the total required power is larger than the maximum discharge power at the current moment, the limiting power is increased according to a first preset increasing change rate.
3. The method according to claim 2, wherein the step of determining the limited power of the current vehicle according to the comparison between the total required power and the maximum discharge power at the current time when the variation between the maximum discharge power of the battery at the previous time and the maximum discharge power at the current time exceeds a power variation threshold comprises:
and when the maximum discharge power of the battery at the last moment is smaller than the maximum discharge power at the current moment, and the variation between the maximum discharge power of the battery at the last moment and the maximum discharge power at the current moment exceeds a power variation threshold, if the total required power is smaller than the maximum discharge power at the current moment, the limiting power is increased according to a second preset increasing change rate.
4. A method according to claim 3, wherein the first predetermined rate of change of rise is less than the second predetermined rate of change of rise.
5. The method according to claim 1, wherein the step of determining the limited power of the current vehicle according to the comparison between the total required power and the maximum discharge power at the current time when the variation between the maximum discharge power of the battery at the previous time and the maximum discharge power at the current time exceeds a power variation threshold comprises:
and when the maximum discharge power of the battery at the last moment is larger than the maximum discharge power at the current moment, and the variation of the maximum discharge power of the battery at the last moment and the maximum discharge power at the current moment exceeds a power threshold, if the total required power is larger than the maximum discharge power at the current moment, reducing the limit power based on a preset reduction change rate.
6. The method of claim 5, further comprising:
and if the total required power is greater than the maximum discharge power at the current moment, sending a reminding signal to a reminding terminal, wherein the reminding signal comprises a prompt that the maximum discharge power of the battery is limited.
7. The method of claim 1, wherein the step of adjusting the actual discharge power according to the limit power so that the actual discharge power is smaller than the maximum discharge power at the current time comprises:
carrying out proportional-integral linear adjustment on the first limiting power to obtain a second limiting power;
and controlling the actual discharging power according to the limiting power until the actual discharging power does not exceed the first limiting power.
8. A power control apparatus based on a rate of change of battery power, the apparatus comprising:
the acquisition module is used for acquiring the total required power of the current vehicle, the current-time maximum discharge power of the power battery, the actual discharge power and the last-time maximum discharge power of the battery in real time;
the determining module is used for determining the limited power of the current vehicle according to the comparison condition of the total required power and the maximum discharging power at the current moment when the variation between the maximum discharging power of the battery at the previous moment and the maximum discharging power at the current moment exceeds a power variation threshold;
and the control module is used for controlling the actual discharging power based on the limiting power so as to enable the actual discharging power to be smaller than the maximum discharging power at the current moment.
9. A vehicle control unit comprising a memory, a processor and a program stored on the memory and executable on the processor, the processor implementing the method of any one of claims 1 to 7 when executing the program.
10. A computer-readable storage medium, characterized in that a computer program is stored in the readable storage medium, which computer program, when executed, implements the method of any of claims 1-7.
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Denomination of invention: Power control method, device, and vehicle controller based on battery power change rate Granted publication date: 20220118 Pledgee: SHANDONG WEIQIAO PIONEERING GROUP Co.,Ltd. Pledgor: Shanghai Luoke Intelligent Technology Co.,Ltd. Registration number: Y2024980017205 |