CN113561792B - Power balance control method for hybrid electric vehicle, computer equipment and storage medium - Google Patents

Power balance control method for hybrid electric vehicle, computer equipment and storage medium Download PDF

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CN113561792B
CN113561792B CN202110735133.3A CN202110735133A CN113561792B CN 113561792 B CN113561792 B CN 113561792B CN 202110735133 A CN202110735133 A CN 202110735133A CN 113561792 B CN113561792 B CN 113561792B
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battery
power
current
calculating
discharge
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CN113561792A (en
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李海波
赵田芳
余绍鹏
王恺
李登辉
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Dongfeng Motor Corp
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Dongfeng Motor Corp
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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
    • B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
    • B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • 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]
    • B60L58/15—Preventing overcharging
    • 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
    • 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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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Hybrid Electric Vehicles (AREA)

Abstract

The invention discloses a power balance control method of a hybrid electric vehicle, which comprises battery overcharge power balance control and battery overdischarge power balance control, wherein the battery overcharge power balance control comprises the following steps: and S11, calculating the overcharge power based on the battery allowable charge power, S12, calculating the overcharge power based on the battery allowable charge current, S13, calculating the overcharge power based on the battery allowable charge voltage, S14, calculating the battery overcharge residual power based on PI, S15, calculating the maximum power generation capacity of the generator, and S16, and limiting the generator capacity. The method not only can balance the power deviation of the power system, but also can meet the overcharge and overdischarge of the battery caused by special working conditions, prolongs the service life of the battery and improves the driving safety.

Description

Power balance control method for hybrid electric vehicle, computer equipment and storage medium
Technical Field
The invention belongs to the field of automobile power control, and particularly relates to a power balance control method, computer equipment and a storage medium of a hybrid electric vehicle.
Background
Hybrid vehicles are equipped with multiple power sources, as shown in fig. 1, typically equipped with high-voltage power batteries, drive motors, generators, and engines, and the system operation modes are complex. Because the capacity of a high-voltage battery of a hybrid electric vehicle is small, short-time overcharge and discharge are easily caused to the battery under certain special working conditions, such as working conditions of high temperature, low temperature, plateau, rapid acceleration or long downhill deceleration, and the like, particularly under high-temperature and high-cold environments, the battery capacity is limited, and the accuracy of torque of an actuator (an engine/a generator/a driving motor) is deviated, and the deviation can lead to unbalanced system power, further lead to overcharge and overdischarge of the battery, even possibly cause forced disconnection of a battery relay in the driving process, and trigger abnormal high-voltage risk of the battery.
Disclosure of Invention
The invention aims to provide a power balance control method, computer equipment and a storage medium for a hybrid electric vehicle, which ensure that the power of a system is kept balanced, the overcharge and the overdischarge of a battery are avoided, the battery is protected, and the service life of the battery is prolonged.
The technical scheme provided by the invention is as follows:
a power balance control method of a hybrid electric vehicle, comprising:
1. battery overcharge power balance control
S11, calculating overcharge power based on battery allowable charge power
According to the current actual power P of the battery a And the battery currently allows short-time charging power P cm Calculating the overcharge power P exceeding the allowable charge power of the battery during charging op ＝Max(P cm -P a ,0)；
S12, calculating overcharge power based on battery allowable charge current
According to the current I of the battery a And the maximum charging current allowed by the battery is I cM Calculating the overcharge current I of the battery during charging b ＝Max(I cM -I a 0); recombined with the current actual voltage V of the battery a Calculating the overrun power P of the current battery charging process due to exceeding the battery current capacity oI ＝I b ×V a ；
S13, calculating overcharge power based on battery allowable charge voltage
According to the current actual voltage V of the battery a And the maximum charging voltage currently allowed by the battery is V cM Calculating the overcharge voltage V of the battery during charging b ＝Max(V a -V cM 0); then, in combination with the internal resistance value R of the battery at the current ambient temperature, calculating the over-limit power P of the current battery charging process due to exceeding the battery voltage capability oV ＝V b ×V a /R；
S14, calculating the battery overcharge residual power based on PI
Calculating the maximum power deviation P of the battery exceeding the battery allowable capacity err ＝Max(Max(P oP ,P oI ,P oV ) 0); PI control is carried out on the power deviation, and output is regulatedResidual power of (2)
Figure GDA0003228349630000021
Wherein, the liquid crystal display device comprises a liquid crystal display device,
Figure GDA0003228349630000022
for the proportional adjustment factor, +>
Figure GDA0003228349630000023
The integral adjustment coefficient;
s15, calculating the maximum power generation capacity of the generator
Calculating the current allowable short-time charging power P of the battery cm And compensating the load power P load Is the difference P of (2) cl Then calculate the adjusted residual power P ee And the difference P cl Sum P of ec Battery overcharge residual power P Roc ＝Max(P ec 0), battery short time allows correction of power capacity P ST ＝Min(P ec 0), the current power consumption of the driving motor is P tc Maximum power generation capacity P of the current generator Ca ＝P ST -P tc +P Roc ；
S16, generator capacity limitation
Calculating a current generator power request P req Combining the maximum power generation capacity P of the current generator Ca Calculating the actual demand power P of the generator cmd ＝Max(P req ,P Ca )。
Preferably, the method further comprises: 2. battery over-discharge power balance control
S21, over-discharge power calculation based on battery allowable discharge power
According to the current actual power P of the battery a And the current allowable short-time discharge power of the battery is P dm Calculating the over-discharge power P exceeding the allowable discharge power of the battery during discharge dp ＝Max(P a -P dm ,0)；
S22, over-discharge power calculation based on battery allowable discharge current
According to the current I of the battery a And electricityThe maximum allowable discharge current of the cell is I dM Calculating over-discharge current I of battery during discharge d ＝Max(I a -I dm 0); recombined with the current actual voltage V of the battery a Calculating the overrun power P of the current battery discharging process due to exceeding the battery current capacity dI ＝I d ×V；
S23, over-discharge power calculation based on battery allowable discharge voltage
According to the current actual voltage V of the battery a And the maximum allowable discharge voltage of the battery is V dM Calculating the overdischarge voltage V of the battery during discharge d ＝Max(V a -V dM 0); then, in combination with the internal resistance value R of the battery at the current ambient temperature, calculating the over-limit power P of the current battery discharging process due to exceeding the battery voltage capacity dV ＝V d ×V a /R；
S24, calculating the over-discharge residual power of the battery based on PI
Calculating the maximum power deviation P of the battery exceeding the battery allowable capacity erd ＝Max(Max(P dP ,P dI ,P dV ) 0); then the power deviation is multiplied by-1 to carry out PI control, and the residual power after adjustment is output
Figure GDA0003228349630000031
Wherein (1)>
Figure GDA0003228349630000032
For the proportional adjustment factor, +>
Figure GDA0003228349630000033
The integral adjustment coefficient;
s25, calculating the maximum driving capability of the driving motor
Calculating the current allowable short-time discharge power of the battery as P dm And compensating the load power P load Is the difference P of (2) ld Then calculate the residual power P after adjustment ed Sum of the rate and the difference P el Battery over-discharge residual power P Rod ＝-1×Min(P el 0), the battery short time allows to correct the discharge capacity P STd ＝Max(P el 0), the actual consumed power of the current generator is P gc Maximum driving capability P of current driving motor Cd ＝P STd -P gc +P Rod ；
S26, limitation of driving motor capability
Calculating a current drive motor drive power request P Tq Combining with the maximum driving capability P of the current driving motor Cd Calculating the actual required driving power P of the driving motor cmd ＝Max(P Tq ,P Cd )。
Preferably, according to the actual current I of the battery a And the current actual voltage V of the battery a Calculating the current actual power P of the battery a ＝I a ×V a 。
Preferably, the method comprises the steps of,
Figure GDA0003228349630000034
the value range is 0-1,/for>
Figure GDA0003228349630000035
The value range is-0.1 to 0.1.
Preferably, the method comprises the steps of,
Figure GDA0003228349630000041
the value range is 0-1,/for>
Figure GDA0003228349630000042
The value range is-0.1 to 0.1.
Preferably, the current power consumption P of the drive motor tc ＝n 3 ×T 3 X 2 pi/(60 x 1000); wherein n is 3 To drive the current rotation speed of the motor, T 3 To drive the motor current torque.
Preferably, the actual consumption power P of the generator gc ＝Min(n g ×T g X 2 pi/(60 x 1000), 0); wherein n is g For the current rotation speed of the generator, T g Is the current torque of the generator.
A computer device comprising a processor and a memory, wherein at least one program is stored in the memory, the at least one program being loaded and executed by the processor to implement the hybrid vehicle power balance control method as described above.
A storage medium having stored therein at least one instruction, at least one program, code set, or instruction set that is loaded and executed by a processor to implement a hybrid vehicle power balance control method as described above.
The beneficial effects of the invention are as follows:
according to the invention, the current actual power of the battery, the allowable charge and discharge current of the battery and the allowable charge and discharge voltage of the battery are used for respectively calculating the overcharge and overdischarge power deviation under various conditions, PI control is carried out on the power deviation, and the calculated residual power and the driving motor/generator capacity are combined to correct the motor/generator torque required by the driver, so that the optimized power generation power required by the generator and the driving motor power requirement required by the driver are output. The method not only can balance the power deviation of the power system, but also can meet the conditions of overcharging and overdischarging of the battery caused by special working conditions, such as high temperature, low temperature, altitude, rapid acceleration or long downhill deceleration, and the like, and the battery is easy to cause short-time overcharging and overdischarging conditions, especially under the high-temperature and high-cold environment, the battery capacity is limited and the torque of the actuator is deviated, the deviations cause unbalanced system power, and even the battery relay is forcibly disconnected in the driving process, so that the service life of the battery is influenced, and the driving safety is also influenced.
Drawings
Fig. 1 is a schematic diagram of a hybrid vehicle powertrain according to the present invention.
Fig. 2 is a battery overcharge power balance control block diagram of an embodiment of the present invention.
Fig. 3 is a battery over-discharge power balance control block diagram of an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described with reference to the accompanying drawings and specific embodiments, but the scope of the present invention is not limited to the following embodiments.
In order to ensure that the multi-power source capability is stable and reliable, protect a battery, prolong the service life of the battery and balance the power of a power system, the invention provides a power balance control method of the power system of a hybrid electric vehicle. The method not only can balance the power deviation of the power system, but also can meet the conditions of over-charge and over-discharge of the battery caused by special working conditions, especially when the battery charging and discharging capacities are weaker and the working efficiency of the motor is lower in a low-temperature environment.
According to the power balance control method for the hybrid electric vehicle power system, disclosed by the embodiment of the invention, the allowable charging capacity of the battery and the torque/power required by the driver are combined, the power of the battery is split, PI control is performed on power deviation, the residual power and the charging and discharging capacity are combined to correct the generator torque and the driving motor command, and the optimized power demand of the generator required by the driver and the driving motor power is output, so that the system power is balanced, and the overcharge and the overdischarge of the battery are avoided. The method specifically comprises the following steps:
1. battery overcharge power balance control, as shown in fig. 2:
s11, calculating overcharge power based on battery allowable charge power:
according to the current I of the battery a (negative charge, positive discharge) the current actual voltage V of the battery a Calculating the actual power of the current battery as P a ,P a ＝I a ×V a And/1000, wherein the division of the above formula by 1000 represents converting power into kilowatt units. The battery currently allows short-time charging power to be P cm Wherein positive values represent discharge and negative values represent charge, the P cm Is negative; overcharging power P exceeding allowable charging power of battery during charging op The current actual power of the battery is subtracted from the current allowable short-time charging power of the battery, namely P op ＝Max(P cm -P a ,0)。
S12, calculating the overcharge power based on the allowable charge current of the battery:
according to the current I of the battery a (charge negative, discharge positive), the maximum current allowed by the battery is I cM (negative charge and positive discharge) to obtain overcharge current I of the battery during charging b I.e. I b ＝Max(I cM -I a 0); recombined with the current actual voltage V of the battery a Calculating the overrun power exceeding the battery current capacity in the current charging process as P oI I.e. P oI ＝I b ×V a /1000。
S13, calculating the overcharge power based on the allowable charge voltage of the battery:
according to the current actual voltage V of the battery a The maximum charging voltage currently allowed by the battery is V cM The overcharge voltage V of the battery during charging can be obtained b I.e. V b ＝Max(V a -V cM 0); then, in combination with the internal resistance value R of the battery at the current ambient temperature, calculating the overrun power exceeding the battery voltage capability in the current charging process as P oV I.e. P oV ＝V b ×V a /(1000×R)。
S14, calculating the battery overcharge residual power based on PI:
after judging based on the above three overcharge conditions, the power deviation P of the battery with the largest output exceeding the battery allowable capacity err I.e. P err ＝Max(Max(P oP ,P oI ,P oV ),0). PI-controlling the power deviation, and outputting the regulated residual power P ee I.e.
Figure GDA0003228349630000061
Wherein->
Figure GDA0003228349630000062
Is a proportion adjusting coefficient, the value of which is 0 to 1 #>
Figure GDA0003228349630000063
The integral regulating coefficient is-0.1 to 0.1.
S15, calculating the maximum power generation capacity of the generator:
residual power P ee The short-time charging power allowed by the current battery is P cm Subtracting the compensating load power P load Short-time power P of battery cl Summing to obtain P ec Wherein P is cl ＝P cm -P load ，P ec ＝P ee +P cl Battery overcharge residual power P Roc ＝Max(P ec 0), battery short time allows correction of power capacity P ST ＝Min(P ec 0), the power consumption of the driving motor is P tc ＝n 3 ×T 3 X 2 pi/(60 x 1000), where n 3 To drive the current rotation speed of the motor, T 3 To drive the motor current torque. Maximum power generation capacity P of current generator Ca I.e. P Ca ＝P ST -P tc +P Roc 。
S16, limiting the required torque of the output generator:
calculating the current generator power generation request as P according to the driver demand req Combining the calculated maximum power generation capacity P of the current generator Ca Calculating the actual required power P of the output generator Cmd I.e. P Cmd ＝Max(P req ,P Ca )。
2. Battery over-discharge power balance control as shown in fig. 3:
s21, over-discharge power calculation based on battery allowable discharge power:
according to the current I of the battery a (negative charge, positive discharge) the current actual voltage V of the battery a Calculating the actual power of the current battery as P a ,P a ＝I a ×V a /1000. The current allowable short-time discharge power of the battery is P dm Wherein positive values represent discharge and negative values represent charge, the P dm Positive values; overdischarge power P exceeding allowable discharge power of battery during discharge dp Subtracting the current allowable short-time discharge power of the battery from the current actual power of the battery, namely P dp ＝Max(P a -P dm ,0)。
S22, calculating over-discharge power based on battery allowable discharge current:
according to the current I of the battery a (charge negative, discharge positive), the maximum current allowed by the battery is I dM (charge is negative and discharge is positive) and overdischarge current I of the battery during discharge can be obtained d I.e. I d ＝Max(I a -I dm 0); recombined with the current actual voltage V of the battery a Calculating the overrun power exceeding the battery current capacity in the current battery discharging process as P dI I.e. P dI ＝I d ×V a /1000。
S23, calculating over-discharge power based on battery allowable discharge voltage:
according to the current actual voltage V of the battery a The maximum allowable discharge voltage of the battery is V dM The overdischarge voltage V of the battery during discharging can be obtained d I.e. V d ＝Max(V a -V dM 0); then, in combination with the internal resistance value R of the battery at the current ambient temperature, calculating the over-limit power of the current battery discharging process due to exceeding the battery voltage capacity as P dV I.e. P dV ＝V d ×V a /(1000×R)。
S24, calculating the over-discharge residual power of the battery based on PI:
after judging based on the above three overcharge conditions, the power deviation P of the battery with the largest output exceeding the battery allowable capacity erd I.e. P erd ＝Max(Max(P dP ,P dI ,P dV ),0). Then the power deviation is multiplied by-1 to carry out PI control, and the adjusted residual power P is output ed I.e.
Figure GDA0003228349630000071
Wherein->
Figure GDA0003228349630000072
Is a proportion adjusting coefficient, the value is 0 to 1,/>
Figure GDA0003228349630000073
the integral regulating coefficient is-0.1 to 0.1.
S25, calculating the maximum driving capability of the driving motor:
residual power P ed The current allowable short-time discharge power of the battery is P dm Subtracting the compensating load power P load Short-time power P of battery ld Summing to obtain P el Wherein P is ld ＝P dm -P load ，P el ＝P ed +P ld Battery over-discharge residual power P Rod ＝-1×Min(P el 0), the battery short time allows to correct the discharge capacity P STd ＝Max(P el 0), the actual consumed power of the current generator is P gc ＝Min(n g ×T g X 2 pi/(60 x 1000), 0), where n g For the current rotation speed of the generator, T g Is the current torque of the generator. Maximum driving capability P of current driving motor Cd I.e. P Cd ＝P STd -P gc +P Rod 。
S26, limiting the required torque of the output driving motor:
calculating the current driving power request of the driving motor as P according to the requirement of a driver Tq Combining the calculated maximum driving capability P of the current driving motor Cd Calculating the actual required driving power P of the output driving motor cmd I.e. P cmd ＝Max(P Tq ,P Cd )。
And the overcharge and overdischarge judgment is combined, the overcharge and overdischarge residual power of the power battery is calculated in real time, and the power requirements of the generator and the driving motor are dynamically adjusted, so that the overcharge and overdischarge under special working conditions and the power imbalance of the power system caused by the torque deviation of the actuator are avoided, and the normal operation of the system is ensured. For example, the battery charging capability is weak at low temperature, and if the battery is overcharged due to motor torque deviation, the power command of the generator/driving motor is regulated through the overcharge balance control at the moment, so that the battery is prevented from being overcharged; the discharging capability of the battery is weak at the moment, and the battery is easy to enter the over-discharging state again under the working conditions of rapid acceleration and the like, so that the over-discharging of the battery is avoided by combining the over-discharging balance control, the system power is balanced, the normal operation of the system is ensured, and the limited performance caused by the system limitation can be reminded to a driver through an instrument.
In another aspect, a computer device is provided, where the computer device includes a processor and a memory, where at least one section of program is stored in the memory, where at least one section of program is loaded and executed by the processor to implement a hybrid vehicle power balance control method according to any one of the embodiments of the present application.
In another aspect, a storage medium is provided, where at least one instruction, at least one program, a code set, or an instruction set is stored, where at least one instruction, at least one program, a code set, or an instruction set is loaded and executed by a processor to implement a hybrid vehicle power balance control method according to any one of the embodiments of the present application.
In summary, the present invention provides a power balance compensation control method for a hybrid electric vehicle power system, which combines the current actual power of a battery, the allowable charge and discharge power of the battery, the allowable charge and discharge current of the battery and the allowable charge and discharge voltage of the battery, splits the power of the battery and performs PI control on power deviation, combines the calculated residual power and the driving motor/generator capability to correct the motor/generator torque required by a driver, outputs the optimized power generated by the generator required by the driver and the power requirement of the driving motor, and avoids overcharge and overdischarge of the battery while balancing the power of the system.
It will be readily appreciated by those skilled in the art that the foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.

Claims (9)

1. A power balance control method for a hybrid vehicle, comprising:
1. battery overcharge power balance control
S11, calculating overcharge power based on battery allowable charge power
According to the current actual power P of the battery a And the battery currently allows short-time charging power P cm Calculating the overcharge power P exceeding the allowable charge power of the battery during charging op ＝Max(P cm -P a ,0)；
S12, calculating overcharge power based on battery allowable charge current
According to the current I of the battery a And the maximum charging current allowed by the battery is I cM Calculating the overcharge current I of the battery during charging b ＝Max(I cM -I a 0); recombined with the current actual voltage V of the battery a Calculating the overrun power P of the current battery charging process due to exceeding the battery current capacity oI ＝I b ×V a Dividing 1000 by 1000, wherein the division indicates converting power into kilowatt units;
s13, calculating overcharge power based on battery allowable charge voltage
According to the current actual voltage V of the battery a And the maximum charging voltage currently allowed by the battery is V cM Calculating the overcharge voltage V of the battery during charging b ＝Max(V a -V cM 0); then, in combination with the internal resistance value R of the battery at the current ambient temperature, calculating the over-limit power P of the current battery charging process due to exceeding the battery voltage capability oV ＝V b ×V a /(1000×R)；
S14, calculating the battery overcharge residual power based on PI
Calculating the maximum power deviation P of the battery exceeding the battery allowable capacity err ＝Max(Max(P oP ,P oI ,P oV ) 0); PI control is carried out on the power deviation, and the residual power after adjustment is output
Figure FDA0004127299130000011
Wherein (1)>
Figure FDA0004127299130000012
For the proportional adjustment factor, +>
Figure FDA0004127299130000013
The integral adjustment coefficient;
s15, calculating the maximum power generation capacity of the generator
Calculating the current allowable short-time charging power P of the battery cm And compensating the load power P load Is the difference P of (2) cl Then calculate the adjusted residual power P ee And the difference P cl Sum P of ec Battery overcharge residual power P Roc ＝Max(P ec 0), battery short time allows correction of power capacity P ST ＝Min(P ec 0), the current power consumption of the driving motor is P tc Maximum power generation capacity P of the current generator Ca ＝P ST -P tc +P Roc ；
S16, generator capacity limitation
Calculating a current generator power request P req Combining the maximum power generation capacity P of the current generator Ca Calculating the actual demand power P of the generator cmd ＝Max(P req ,P Ca )。
2. The method for controlling power balance of a hybrid vehicle according to claim 1, characterized in that the method further comprises:
2. battery over-discharge power balance control
S21, over-discharge power calculation based on battery allowable discharge power
According to the current actual power P of the battery a And the current allowable short-time discharge power of the battery is P dm Calculating the over-discharge power P exceeding the allowable discharge power of the battery during discharge dp ＝Max(P a -P dm ,0)；
S22, over-discharge power calculation based on battery allowable discharge current
According to the current I of the battery a And the maximum allowable discharge current of the battery is I dM Calculating over-discharge current I of battery during discharge d ＝Max(I a -I dm 0); recombination of current batteriesActual voltage V a Calculating the overrun power P of the current battery discharging process due to exceeding the battery current capacity dI ＝I d ×V a /1000；
S23, over-discharge power calculation based on battery allowable discharge voltage
According to the current actual voltage V of the battery a And the maximum allowable discharge voltage of the battery is V dM Calculating the overdischarge voltage V of the battery during discharge d ＝Max(V a -V dM 0); then, in combination with the internal resistance value R of the battery at the current ambient temperature, calculating the over-limit power P of the current battery discharging process due to exceeding the battery voltage capacity dV ＝V d ×V a /(1000×R)；
S24, calculating the over-discharge residual power of the battery based on PI
Calculating the maximum power deviation P of the battery exceeding the battery allowable capacity erd ＝Max(Max(P dP ,P dI ,P dV ) 0); then the power deviation is multiplied by-1 to carry out PI control, and the residual power after adjustment is output
Figure FDA0004127299130000021
Wherein (1)>
Figure FDA0004127299130000022
For the proportional adjustment factor, +>
Figure FDA0004127299130000023
The integral adjustment coefficient;
s25, calculating the maximum driving capability of the driving motor
Calculating the current allowable short-time discharge power of the battery as P dm And compensating the load power P load Is the difference P of (2) ld Then calculate the adjusted residual power P ed Sum of the difference P el Battery over-discharge residual power P Rod ＝-1×Min(P el 0), the battery short time allows to correct the discharge capacity P STd ＝Max(P el 0), the actual consumed power of the current generator is P gc Maximum driving capability of the current driving motorP Cd ＝P STd -P gc +P Rod ；
S26, limitation of driving motor capability
Calculating a current drive motor drive power request P Tq Combining with the maximum driving capability P of the current driving motor Cd Calculating the actual required driving power P of the driving motor cmd ＝Max(P Tq ,P Cd )。
3. The power balance control method of a hybrid vehicle according to claim 1 or 2, characterized in that the current I is based on the current actual current of the battery a And the current actual voltage V of the battery a Calculating the current actual power P of the battery a ＝I a ×V a /1000。
4. The method for controlling power balance of a hybrid vehicle according to claim 1, wherein,
Figure FDA0004127299130000031
the value range is 0-1,/for>
Figure FDA0004127299130000032
The value range is-0.1 to 0.1.
5. The method for controlling power balance of a hybrid vehicle according to claim 2, wherein,
Figure FDA0004127299130000033
the value range is 0-1,/for>
Figure FDA0004127299130000034
The value range is-0.1 to 0.1.
6. The power balance control method of a hybrid vehicle according to claim 1, characterized in that the power consumption P of the current drive motor tc ＝n 3 ×T 3 ×2Pi/(60×1000); wherein n is 3 To drive the current rotation speed of the motor, T 3 To drive the motor current torque.
7. The method for controlling power balance of a hybrid vehicle according to claim 2, wherein the actual power consumption P of the current generator gc ＝Min(n g ×T g X 2 pi/(60 x 1000), 0); wherein n is g For the current rotation speed of the generator, T g Is the current torque of the generator.
8. A computer device comprising a processor and a memory, wherein the memory stores at least one program, the at least one program being loaded and executed by the processor to implement the hybrid vehicle power balance control method of any of the preceding claims.
9. A storage medium having stored therein at least one instruction, at least one program, code set, or instruction set, the at least one instruction, at least one program, code set, or instruction set being loaded and executed by a processor to implement the hybrid vehicle power balance control method of any of the preceding claims.
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WO2018103604A1 (en) * 2016-12-05 2018-06-14 郑州宇通客车股份有限公司 Power output control method and device, and power feedback control method and device
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1174790A (en) * 1996-01-05 1998-03-04 Smh管理服务有限公司 Method and device of controlling electric power distribution for motor vehicles especially the mixing power driven vehicles
JP5477030B2 (en) * 2009-05-22 2014-04-23 日産自動車株式会社 Control device for electric vehicle
DE102012209200A1 (en) * 2011-06-03 2012-12-06 GM Global Technology Operations LLC (n.d. Ges. d. Staates Delaware) Method and apparatus for controlling torque output of a hybrid powertrain system
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