CN113859048B - Vehicle power generation control method, control system and vehicle - Google Patents
Vehicle power generation control method, control system and vehicle Download PDFInfo
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- CN113859048B CN113859048B CN202010615270.9A CN202010615270A CN113859048B CN 113859048 B CN113859048 B CN 113859048B CN 202010615270 A CN202010615270 A CN 202010615270A CN 113859048 B CN113859048 B CN 113859048B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- 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]
- B60L58/14—Preventing excessive discharging
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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]
- B60L58/15—Preventing overcharging
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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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- Sustainable Energy (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention provides a vehicle power generation control method, which comprises the following steps: acquiring the state of charge of a power battery; acquiring the discharge power of a power battery; acquiring set power generation power of a belt pulley motor; obtaining the maximum power of a belt pulley motor; obtaining the total power consumption of the electric appliance; if the charge state of the power battery is larger than a first set value and the discharge power of the power battery is larger than a second set value, taking the minimum value of the set power generation power of the belt pulley motor and the maximum power generation power of the belt pulley motor as the actual power generation power of the belt pulley motor; and if the charge state of the power battery is smaller than or equal to the first set value, or the discharge power of the power battery is smaller than or equal to the second set value, determining the actual power generation power of the belt pulley motor according to the total power consumption of the electric appliance and the maximum power generation power of the belt pulley motor. And the charge and discharge safety of the power battery is improved. The invention further provides a vehicle power generation control system and a vehicle.
Description
Technical Field
The present invention relates to the field of vehicle control, and in particular, to a vehicle power generation control method, a vehicle power generation control system, and a vehicle.
Background
The prior art discloses a vehicle power generation control method, which adjusts the total power consumption of electric appliances according to the charge state of a power battery, distributes the power consumption for each electric appliance, and takes the maximum value of the power consumption of each electric appliance as the actual power generation.
The vehicle with the technology can generate the danger of overcharging or overdischarging of the battery due to the insufficient charge and discharge capability of the power battery under the high-low temperature working condition; the allocation of power to individual consumers according to priority, for example DCDC power limitation, results in low-voltage battery feeding, is not considered.
Disclosure of Invention
The present invention aims to solve at least to some extent one of the technical problems in the above-described technology. Therefore, a first object of the present invention is to provide a vehicle power generation control method that improves the safety of charging or discharging a power battery.
A second object of the present invention is to provide a vehicle power generation control system.
A third object of the present invention is to propose a vehicle.
To achieve the above object, an embodiment of a first aspect of the present invention provides a vehicle power generation control method, including the steps of: acquiring the state of charge of a power battery; acquiring the discharge power of a power battery; acquiring set power generation power of a belt pulley motor; obtaining the maximum power of a belt pulley motor; obtaining the total power consumption of the electric appliance; if the state of charge of the power battery is greater than a first set value and the discharge power of the power battery is greater than a second set value, taking the minimum value of the set power generation power of the belt pulley motor and the maximum power generation power of the belt pulley motor as the actual power generation power of the belt pulley motor; and if the charge state of the power battery is smaller than or equal to the first set value, or the discharge power of the power battery is smaller than or equal to the second set value, determining the actual power generation of the belt pulley motor according to the total power consumption of the electric appliance and the maximum power generation of the belt pulley motor.
According to the vehicle power generation control method provided by the embodiment of the invention, when the charge state of the power battery is larger than the first set value and the discharge power of the power battery is larger than the second set value, the battery can be charged and discharged, the phenomenon of overcharge or overdischarge is avoided, and the charging or discharging safety of the power battery is improved; if the state of charge of the power battery is smaller than or equal to the first set value, or the discharge power of the power battery is smaller than or equal to the second set value, the charging capacity or the discharging capacity of the battery is insufficient at the moment, and the requirement of the total electric power consumption of the electric appliance is considered to be met.
According to some embodiments of the invention, the determining the actual generated power of the pulley motor according to the total power of the electric appliance and the maximum generated power of the pulley motor includes: comparing the total power of the electric appliance with the maximum power of the belt pulley motor; and if the total power consumption of the electric appliances is larger than the maximum power generation power of the belt pulley motor, taking the maximum power generation power of the belt pulley motor as the actual power generation power of the belt pulley motor, and limiting the power consumption of each electric appliance according to a set rule.
According to some embodiments of the invention, if the total power of the electric appliance is less than or equal to the maximum power of the pulley motor, calculating a sum of the total power of the electric appliance and the maximum charging power of the power battery, and taking a minimum value of the sum and the maximum power of the pulley motor as the actual power of the pulley motor.
According to some embodiments of the invention, limiting the power consumption of each of the electric appliances according to a set rule includes: and distributing power for each electric appliance according to the priority of the requirements of the belt pulley motor for starting the engine, the power supply requirement of the motor controller, the defrosting and defogging requirements of the air conditioner, the requirement of the battery, the driving requirement of the driving motor, the use requirement of the air conditioner and the power-preserving requirement of the low-voltage storage battery.
According to some embodiments of the invention, the obtaining the maximum generated power of the pulley motor comprises: acquiring working condition power generation power of the belt pulley motor; obtaining limited power generation; and taking the minimum value of the working condition power generation power of the belt pulley motor and the limiting power generation power as the maximum power generation power of the belt pulley motor.
According to some embodiments of the invention, the obtaining the set power of the pulley motor includes: and acquiring the set power generation power of the belt pulley motor according to the vehicle speed.
To achieve the above object, a second aspect of the present invention provides a vehicle power generation control system, comprising: the first acquisition module is used for acquiring the state of charge of the power battery; the second acquisition module is used for acquiring the discharge power of the power battery; the third acquisition module is used for acquiring the set power generation power of the belt pulley motor; the fourth acquisition module is used for acquiring the maximum power generation of the belt pulley motor; the fifth acquisition module is used for acquiring the total power of the electric appliance; the first determining module is used for taking the minimum value of the set power generation power of the belt pulley motor and the maximum power generation power of the belt pulley motor as the actual power generation power of the belt pulley motor when the charge state of the power battery is larger than a first set value and the discharge power of the power battery is larger than a second set value; and the second determining module is used for determining the actual power generation power of the belt pulley motor according to the total power consumption of the electric appliance and the maximum power generation power of the belt pulley motor when the charge state of the power battery is smaller than or equal to the first set value or when the discharge power of the power battery is smaller than or equal to the second set value.
According to the vehicle power generation control system provided by the embodiment of the invention, the first determining module considers the charge state of the power battery and the discharge power of the power battery, and when the charge and discharge capacity of the power battery is sufficient, the power battery can be charged and discharged, the phenomenon of overcharge or overdischarge is avoided, and the charge or discharge safety of the power battery is improved; in the event of insufficient charging or discharging capacity of the battery, the second determination module takes into account the requirement for the total power consumption of the electrical appliance.
According to some embodiments of the invention, the second determining module is further configured to: comparing the total power of the electric appliance with the maximum power of the belt pulley motor; and if the total power consumption of the electric appliances is larger than the maximum power generation power of the belt pulley motor, taking the maximum power generation power of the belt pulley motor as the actual power generation power of the belt pulley motor, and limiting the power consumption of each electric appliance according to a set rule.
According to some embodiments of the invention, the second determining module is further configured to calculate a sum of the total electric power of the electric appliance and the maximum charging power of the power battery, and take a minimum value of the sum and the maximum electric power of the electric motor as the actual electric power of the electric motor when the total electric power of the electric appliance is less than or equal to the maximum electric power of the electric motor.
To achieve the above object, an embodiment of a third aspect of the present invention provides a vehicle including the vehicle power generation control system of the second aspect of the present invention.
According to the vehicle provided by the embodiment of the invention, when the charging capacity and the discharging capacity of the power battery are sufficient, the phenomenon of overcharging or overdischarging cannot occur, the charging or discharging safety of the battery is ensured, the power generation efficiency of the belt pulley motor is improved, the energy conservation and consumption reduction are facilitated, when the charging capacity and the discharging capacity of the power battery are insufficient, the requirement of the total power consumption of an electric appliance is met, the utilization rate of the power generation power of the belt pulley motor is improved, and therefore, the charging and discharging efficiency of the vehicle is improved, the power generation efficiency of the vehicle is improved, the mechanical efficiency of the vehicle is improved, and the safety of the vehicle is improved.
Drawings
FIG. 1 is a first flowchart of a vehicle power generation control method of the present invention;
FIG. 2 is a second flowchart of a vehicle power generation control method of the present invention;
FIG. 3 is a block diagram of a second determination module of the vehicle power generation control system of the present invention;
FIG. 4 is a block diagram of a vehicle power generation control system of the present invention;
fig. 5 is a structural view of a vehicle of the present invention.
Reference numerals: the vehicle power generation control system 100 and the vehicle 1000 include a first acquisition module 10, a second acquisition module 20, a third acquisition module 30, a fourth acquisition module 40, a fifth acquisition module 50, a first determination module 60, and a second determination module 70, wherein S2, S3, S4, S5, and S6 represent the sequence of steps of the method, C represents a first set value, Q represents a second set value, Y represents yes, and N represents no.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to fig. 1-5 are exemplary and intended to be illustrative of the present invention and should not be construed as limiting the invention.
As shown in fig. 1, a first aspect of the present invention proposes a vehicle power generation control method, including the steps of: acquiring the state of charge of a power battery; acquiring the discharge power of a power battery; acquiring set power generation power of a belt pulley motor; obtaining the maximum power of a belt pulley motor; obtaining the total power consumption of the electric appliance; if the charge state of the power battery is larger than a first set value and the discharge power of the power battery is larger than a second set value, taking the minimum value of the set power generation power of the belt pulley motor and the maximum power generation power of the belt pulley motor as the actual power generation power of the belt pulley motor; and if the charge state of the power battery is smaller than or equal to the first set value, or the discharge power of the power battery is smaller than or equal to the second set value, determining the actual power generation power of the belt pulley motor according to the total power consumption of the electric appliance and the maximum power generation power of the belt pulley motor.
It should be noted that, the charge state of the power battery and the discharge power of the battery reflect the charge capability of the battery together, and the discharge power of the battery also reflects the discharge capability of the power battery, if the charge state of the power battery is greater than the first set value and the discharge power of the power battery is greater than the second set value, it indicates that the charge capability and the discharge capability of the power battery are sufficient at this time, no overcharge or overdischarge phenomenon occurs, and the charge or discharge safety of the battery is ensured. The set power generation power of the belt pulley motor is considered to reflect the power generation power of the normal operation of the belt pulley, the maximum power generation power of the belt pulley motor is reflected to the maximum power generation capacity of the belt pulley motor, and when the charging capacity and the discharging capacity of the power battery are sufficient, the minimum value of the set power generation power of the belt pulley motor and the maximum power generation power of the belt pulley motor is taken as the actual power generation power of the belt pulley motor, so that energy conservation and consumption reduction are facilitated. The power battery discharging power being less than or equal to the second set value indicates that the power battery discharging capability is insufficient, the power battery charging state being less than or equal to the first set value and the power battery discharging power being less than or equal to the second set value indicates that the power battery charging capability is insufficient. When the charging capacity or the discharging capacity of the power battery is insufficient, the actual power generation power of the belt pulley motor is determined according to the total power consumption of the electric appliance and the maximum power generation power of the belt pulley motor, and the requirement of meeting the total power consumption of the electric appliance is considered while the maximum power generation power of the belt pulley motor is considered. The power battery is a high-voltage battery and a high-voltage storage battery, and provides driving force for a driving motor of the vehicle. The low-voltage storage battery is a low-voltage battery and a starting battery, and provides power for starting a starting motor of a vehicle, such as a belt pulley motor and an engine. The Belt pulley motor, i.e., the BSG (Belt-Driven Starter Generator) motor, drives the motor to provide driving force to the vehicle. The state of charge, SOC (State Of Charge), the first set point and the second set point are calibrated according to the experiment. The total power consumption of the electric appliances is the sum of the power consumption of each electric appliance. The steps of obtaining the state of charge of the power battery, obtaining the discharge power of the power battery, obtaining the set power generation power of the pulley motor, obtaining the maximum power generation power of the pulley motor, and obtaining the total power consumption of the electric appliance may be performed simultaneously or in sequence, and are not limited to the embodiment.
Specifically, determining the actual generated power of the pulley motor from the total power of the electric appliance and the maximum generated power of the pulley motor includes: comparing the total power of the electric appliance with the maximum power of the belt pulley motor; if the total power of the electric appliances is larger than the maximum power of the belt pulley motor, the maximum power of the belt pulley motor is taken as the actual power of the belt pulley motor, and the power of each electric appliance is limited according to the set rule. If the total power consumption of the electric appliances is larger than the maximum power generation capacity of the belt pulley motor, the fact that the total power consumption of the electric appliances exceeds the maximum power generation capacity of the belt pulley motor is indicated, the maximum power generation capacity of the belt pulley motor is taken as the actual power generation capacity of the belt pulley motor, the total power consumption requirement of the electric appliances is met as much as possible, the power consumption of each electric appliance is limited according to a set rule, and the power consumption of each electric appliance can be limited according to the power consumption requirement of each electric appliance, so that the optimal power consumption distribution is achieved.
Preferably, limiting the power consumption of each of the electric appliances according to the set rule includes: the power consumption is distributed to all the electric appliances according to the priority of the requirements of the belt pulley motor for starting the engine, the requirements of the direct current converter, the defrosting and defogging requirements of the air conditioner, the temperature requirements of the power battery, the driving requirements of the motor, the use requirements of the air conditioner and the electricity protection requirements of the low-voltage storage battery. When the state of charge of the power battery is low or the discharging capability is insufficient, the engine can be started through the belt pulley motor, and the vehicle can generate electricity after the engine is started; when the low-voltage storage battery has low electric quantity, in order to ensure normal supply of low voltage and avoid power failure of a vehicle controller, the power requirement of a direct current converter (DCDC or DC/DC) needs to be ensured; the defrosting and demisting capacity of the air conditioner influences the visual range of a driver and the driving safety; battery cooling affects the discharge and charge capabilities of the battery, and excessive power battery temperatures can cause battery charge and discharge capabilities to be limited; motor drive affects the power performance of the vehicle; the comfort of passengers is affected by the use of the air conditioner; the charging of the low-voltage battery affects the electrical retention of the low-voltage battery.
Further, if the total power of the electric appliance is smaller than or equal to the maximum power of the belt pulley motor, calculating the sum of the total power of the electric appliance and the maximum charging power of the power battery, and taking the minimum value of the sum and the maximum power of the belt pulley motor as the actual power of the belt pulley motor. If the total power of the electric appliance is smaller than or equal to the maximum power of the belt pulley motor, the maximum power generation capacity of the belt pulley motor can meet the requirement of the total power of the electric appliance, the sum of the total power of the electric appliance and the maximum charging power of the power battery is provided by the belt pulley motor, and the minimum value of the sum and the maximum power generation power of the belt pulley motor is taken as the actual power generation power of the belt pulley motor, so that the energy conservation and consumption reduction are facilitated.
Preferably, obtaining the maximum generated power of the pulley motor includes: acquiring working condition power generation power of a belt pulley motor; obtaining limited power generation; and taking the minimum value of the working condition power generation power and the limiting power generation power of the belt pulley motor as the maximum power generation power of the belt pulley motor. The limiting power is determined according to the limit values of the engine and the belt pulley motor, the power generated by the belt pulley motor under different working conditions is different, for example, when the engine or the belt pulley motor fails, the set power generated by the belt pulley motor cannot be used as the actual power generated by the belt pulley motor, the limiting power and the working condition power generated by the belt pulley motor need to be considered at the same time, and the minimum value of the working condition power generated by the belt pulley motor and the limiting power is used as the maximum power generated by the belt pulley motor, so that the energy conservation and consumption reduction are facilitated.
Preferably, the working condition power generation power of the pulley motor is determined according to the requirements of NVH (Noise, vibration, harshness, noise, vibration and harshness), the actual power generation power conversion of the pulley motor frequently affects the NVH performance of the whole vehicle, the working condition power generation power of the pulley motor is determined according to the requirements of NVH, and the maximum power generation power of the pulley motor can be set to be switched in a stable interval, so that the actual power generation power of the pulley motor can be set to be switched in the stable interval.
Preferably, obtaining the set generated power of the pulley motor includes: and acquiring the set power generation power of the belt pulley motor according to the vehicle speed. And acquiring different set power generation powers of the belt pulley motors according to different vehicle speeds, wherein the larger the vehicle speed is, the set power generation powers of the belt pulley motors meet the dynamic requirements of the vehicle.
The vehicle power generation control method of the invention is described below with reference to the embodiment of fig. 2.
S1: judging that the SOC is less than or equal to C or the discharging power of the power battery is less than or equal to Q, namely judging that the state of charge of the power battery is less than or equal to a first set value, or judging that the discharging power of the power battery is less than or equal to a second set value, if yes, entering S3, and if no, entering S2;
s2: the actual power of the BSG motor=min (set power of the BSG motor, maximum power of the BSG motor), and the power consumption of the electrical appliance is not limited, i.e., the minimum value of the set power of the pulley motor and the maximum power of the pulley motor is taken as the actual power of the pulley motor;
s3: judging that the total power of the electric appliance is less than or equal to the maximum power generation capacity of the BSG motor, namely judging that the total power of the electric appliance is less than or equal to the maximum power generation capacity of the belt pulley motor, if yes, entering S5, and if no, entering S4;
s4: the actual generated power of the BSG motor=the maximum generated power of the BSG motor, that is, the maximum generated power of the pulley motor is taken as the actual generated power of the pulley motor, and the process goes to S6;
s5: the actual power of the BSG motor=min (total power of the electric appliance+maximum power of the power battery, maximum power of the BSG motor), the electric power of the electric appliance is not limited, that is, the sum of the total power of the electric appliance and the maximum power of the power battery is calculated, and the minimum value of the sum and the maximum power of the pulley motor is taken as the actual power of the pulley motor;
s6: limiting the power consumption of each electric appliance according to a set rule, wherein the total power consumption of the electric appliances=the required power for starting a BSG motor/the required power of n1+DCDC/the required power of n2+the defrosting and defogging requirements of an air conditioner/the temperature required power of an n3+ power battery/the required power of n4+the required power of a driving motor/the required power of n5+the use required power of the air conditioner/the power-saving required power of an n6+ power battery/n 7, and n1, n2, n3, n4, n5, n6 and n7 are respectively a first coefficient, a second coefficient, a third coefficient, a fourth coefficient, a fifth coefficient, a sixth coefficient and a seventh coefficient which are larger than or equal to zero. According to a preferred embodiment of the present invention, the electric power for each electric appliance is allocated according to the priority of the demand for starting the engine by the pulley motor, the demand for the dc converter, the defrosting and defogging demands of the air conditioner, the temperature demand of the power battery, the driving demand of the motor, the use demand of the air conditioner, the power-conserving demand of the low-voltage storage battery, i.e., n1 > n2 > n3 > n4 > n5 > n6 > n7.
As shown in fig. 4, a second aspect of the present invention proposes a vehicle power generation control system 100 including: the first acquisition module 10 is used for acquiring the state of charge of the power battery by the first acquisition module 10; the second acquisition module 20 is used for acquiring the discharge power of the power battery; the third acquisition module 30 is used for acquiring the set power generation power of the belt pulley motor; the fourth acquisition module 40 is used for acquiring the maximum power of the belt pulley motor; the fifth acquisition module 50 is used for acquiring the total power consumption of the electric appliance by the fifth acquisition module 50; a first determining module 60, configured to take, as an actual power of the pulley motor, a minimum value of the set power of the pulley motor and the maximum power of the pulley motor when the state of charge of the power battery is greater than a first set value and the discharge power of the power battery is greater than a second set value; the second determining module 70 is configured to determine the actual power of the pulley motor according to the total power of the electric appliance and the maximum power of the pulley motor when the state of charge of the power battery is less than or equal to the first set value, or when the discharge power of the power battery is less than or equal to the second set value. The first acquisition module 10 and the second acquisition module 20 may be two independent modules, or may be two modules integrated in the power battery manager, and the third acquisition module 30 and the fourth acquisition module 40 may be two independent modules, or may be two modules integrated in the BSG motor controller.
It should be noted that, the charge state of the power battery and the discharge power of the battery reflect the charge capability of the battery together, and the discharge power of the battery also reflects the discharge capability of the power battery, if the charge state of the power battery is greater than the first set value and the discharge power of the power battery is greater than the second set value, it indicates that the charge capability and the discharge capability of the power battery are sufficient at this time, no overcharge or overdischarge phenomenon occurs, and the charge or discharge safety of the battery is ensured. Considering that the set power of the pulley motor reflects the power of the pulley motor which normally works, the maximum power of the pulley motor reflects the maximum power of the pulley motor, and when the charging capacity and the discharging capacity of the power battery are sufficient, the first determining module 60 takes the minimum value of the set power of the pulley motor and the maximum power of the pulley motor as the actual power of the pulley motor, which is beneficial to energy saving and consumption reduction. The power battery discharging power being less than or equal to the second set value indicates that the power battery discharging capability is insufficient, the power battery charging state being less than or equal to the first set value and the power battery discharging power being less than or equal to the second set value indicates that the power battery charging capability is insufficient. When the charging capability or discharging capability of the power battery is insufficient, the second determination module 70 determines the actual power generation of the pulley motor according to the total power consumption of the electric appliance and the maximum power generation of the pulley motor, and considers the requirement of satisfying the total power consumption of the electric appliance while considering the maximum power generation of the pulley motor. The power battery is a high-voltage battery and a high-voltage storage battery, and provides driving force for a driving motor of the vehicle. The low-voltage storage battery is a low-voltage battery and a starting battery, and provides power for starting a starting motor of a vehicle, such as a belt pulley motor and an engine. The pulley motor is a BSG motor, and the driving motor provides driving force to the vehicle. The state of charge, SOC (State Of Charge), the first set point and the second set point are calibrated according to the experiment. The total power consumption of the electric appliances is the sum of the power consumption of each electric appliance. The first determination module 60 and the second determination module 70 may be separate modules, or may be two modules integrated into the same controller (e.g., VCU, vehicle controller).
Specifically, the second determination module 70 is further configured to: comparing the total power of the electric appliance with the maximum power of the belt pulley motor; if the total power of the electric appliances is larger than the maximum power of the belt pulley motor, the maximum power of the belt pulley motor is taken as the actual power of the belt pulley motor, and the power of each electric appliance is limited according to the set rule. If the total power consumption of the electric appliances is larger than the maximum power generation capacity of the belt pulley motor, the fact that the total power consumption of the electric appliances exceeds the maximum power generation capacity of the belt pulley motor is indicated, the maximum power generation capacity of the belt pulley motor is taken as the actual power generation capacity of the belt pulley motor, the total power consumption requirement of the electric appliances is met as much as possible, the power consumption of each electric appliance is limited according to a set rule, and the power consumption of each electric appliance can be limited according to the power consumption requirement of each electric appliance, so that the optimal power consumption distribution is achieved.
Preferably, as shown in fig. 3, the second determining module 70 limits the power consumption of each of the electric appliances according to the set rule, including: and distributing power to each electric appliance according to the priority of the requirements of the belt pulley motor for starting the engine, the requirements of the direct current converter, the defrosting and defogging requirements of the air conditioner, the requirements of the battery, the driving requirements of the motor, the use requirements of the air conditioner and the power conservation requirements of the low-voltage storage battery. When the state of charge of the power battery is low or the discharging capability is insufficient, the engine can be started through the belt pulley motor, and the vehicle can generate electricity after the engine is started; when the low-voltage storage battery has low electric quantity, in order to ensure normal supply of low voltage and avoid power failure of a vehicle controller, the power requirement of a direct current converter (DCDC or DC/DC) needs to be ensured; the defrosting and demisting capacity of the air conditioner influences the visual range of a driver and the driving safety; battery cooling affects the discharge and charge capabilities of the battery, and excessive battery temperature can cause limited battery charge and discharge capabilities; motor drive affects the power performance of the vehicle; the comfort of passengers is affected by the use of the air conditioner; the charging of the low-voltage battery affects the electrical retention of the low-voltage battery. The second determining module 70 obtains the power consumption, the power consumption demand or the power demand of each of the electric appliances through the BSG motor controller, the DCDC, the air conditioner controller, the driving motor, the BMS and the LBMS, wherein the temperature demand consideration of the power battery includes SOC, maximum charge power, maximum discharge power and power battery temperature, and the electricity conservation demand consideration of the low voltage battery includes the amount of electricity of the low voltage storage battery. The BMS is a power battery manager (Battery Manager System), and the LBMS is a low-voltage battery manager (Low Battery Manager System).
Further, the second determining module 70 is further configured to calculate, when the total power of the electric appliance is less than or equal to the maximum power of the pulley motor, a sum of the total power of the electric appliance and the maximum charging power of the power battery, and take a minimum value of both the sum and the maximum power of the pulley motor as the actual power of the pulley motor. If the total power of the electric appliance is smaller than or equal to the maximum power of the belt pulley motor, the maximum power generation capacity of the belt pulley motor can meet the requirement of the total power of the electric appliance, the sum of the total power of the electric appliance and the maximum charging power of the power battery is provided by the belt pulley motor, and the minimum value of the sum and the maximum power generation power of the belt pulley motor is taken as the actual power generation power of the belt pulley motor, so that the energy conservation and consumption reduction are facilitated.
Preferably, the fourth obtaining module 40 obtains the maximum electric power of the pulley motor includes: acquiring working condition power generation power of a belt pulley motor; obtaining limited power generation; and taking the minimum value of the working condition power generation power and the limiting power generation power of the belt pulley motor as the maximum power generation power of the belt pulley motor. The limiting power is determined according to the limit values of the engine and the belt pulley motor, the power generated by the belt pulley motor under different working conditions is different, for example, when the engine or the belt pulley motor fails, the set power generated by the belt pulley motor cannot be used as the actual power generated by the belt pulley motor, the limiting power and the working condition power generated by the belt pulley motor need to be considered at the same time, and the minimum value of the working condition power generated by the belt pulley motor and the limiting power is used as the maximum power generated by the belt pulley motor, so that the energy conservation and consumption reduction are facilitated.
Preferably, the fourth obtaining module 40 determines the working condition power generation of the pulley motor according to the requirements of NVH (Noise, vibration, harshness, noise, vibration and harshness), the actual power generation of the pulley motor is frequently changed to affect the NVH performance of the whole vehicle, and determines the working condition power generation of the pulley motor according to the requirements of NVH, so that the maximum power generation of the pulley motor can be set to be switched in a stable zone, and the actual power generation of the pulley motor can be set to be switched in the stable zone.
Preferably, the third acquisition module 30 acquires the set power generation of the pulley motor includes: and acquiring the set power generation power of the belt pulley motor according to the vehicle speed. And acquiring different set power generation powers of the belt pulley motors according to different vehicle speeds, wherein the larger the vehicle speed is, the set power generation powers of the belt pulley motors meet the dynamic requirements of the vehicle.
As shown in fig. 5, a third aspect of the invention proposes a vehicle 1000 including the vehicle power generation control system 100 of the second aspect of the invention.
According to the vehicle 1000 of the invention, when the charging capacity and the discharging capacity of the power battery are sufficient, the vehicle power generation control system 100 does not generate the phenomenon of overcharge or overdischarge, ensures the safety of battery charging or discharging, improves the power generation efficiency of the belt pulley motor, is beneficial to saving energy and reducing consumption, and when the charging capacity and the discharging capacity of the power battery are insufficient, meets the requirement of the total electric power of the electric appliance, improves the utilization rate of the power generation power of the belt pulley motor, thereby improving the charging and discharging efficiency of the vehicle 1000, improving the power generation efficiency of the vehicle 1000, improving the mechanical efficiency of the vehicle 1000 and improving the safety of the vehicle 1000.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (10)
1. A vehicle power generation control method characterized by comprising the steps of:
acquiring the state of charge of a power battery;
acquiring the discharge power of a power battery;
acquiring set power generation power of a belt pulley motor;
obtaining the maximum power of a belt pulley motor;
obtaining the total power consumption of the electric appliance;
if the state of charge of the power battery is greater than a first set value and the discharge power of the power battery is greater than a second set value, taking the minimum value of the set power generation power of the belt pulley motor and the maximum power generation power of the belt pulley motor as the actual power generation power of the belt pulley motor;
and if the charge state of the power battery is smaller than or equal to the first set value, or the discharge power of the power battery is smaller than or equal to the second set value, determining the actual power generation of the belt pulley motor according to the total power consumption of the electric appliance and the maximum power generation of the belt pulley motor.
2. The vehicle power generation control method according to claim 1, wherein the determining the actual power generation of the pulley motor based on the total power consumption of the electric appliance and the maximum power generation of the pulley motor includes:
comparing the total power of the electric appliance with the maximum power of the belt pulley motor;
and if the total power consumption of the electric appliances is larger than the maximum power generation power of the belt pulley motor, taking the maximum power generation power of the belt pulley motor as the actual power generation power of the belt pulley motor, and limiting the power consumption of each electric appliance according to a set rule.
3. The vehicle power generation control method according to claim 2, characterized in that if the total electric power of the electric consumer is less than or equal to the maximum electric power of the pulley motor, a sum of the total electric power of the electric consumer and the maximum charging power of the power battery is calculated, and a minimum of the sum and the maximum electric power of the pulley motor is taken as the actual electric power of the pulley motor.
4. The vehicle power generation control method according to claim 2, wherein the limiting the electric power consumption of each of the electric appliances according to the set rule includes:
and distributing power for each electrical appliance according to the priority of the requirements of the belt pulley motor for starting the engine, the requirements of the direct current converter, the defrosting and defogging requirements of the air conditioner, the requirements of the battery, the driving requirements of the driving motor, the use requirements of the air conditioner and the power-preserving requirements of the low-voltage storage battery.
5. The vehicle power generation control method according to claim 1, wherein the obtaining the maximum power generation of the pulley motor includes:
acquiring working condition power generation power of the belt pulley motor;
obtaining limited power generation;
and taking the minimum value of the working condition power generation power of the belt pulley motor and the limiting power generation power as the maximum power generation power of the belt pulley motor.
6. The vehicle power generation control method according to claim 1, wherein the obtaining the set power generation of the pulley motor includes: and acquiring the set power generation power of the belt pulley motor according to the vehicle speed.
7. A vehicle power generation control system, characterized by comprising:
the first acquisition module is used for acquiring the state of charge of the power battery;
the second acquisition module is used for acquiring the discharge power of the power battery;
the third acquisition module is used for acquiring the set power generation power of the belt pulley motor;
the fourth acquisition module is used for acquiring the maximum power generation of the belt pulley motor;
the fifth acquisition module is used for acquiring the total power of the electric appliance;
the first determining module is used for taking the minimum value of the set power generation power of the belt pulley motor and the maximum power generation power of the belt pulley motor as the actual power generation power of the belt pulley motor when the charge state of the power battery is larger than a first set value and the discharge power of the power battery is larger than a second set value; and the second determining module is used for determining the actual power generation power of the belt pulley motor according to the total power consumption of the electric appliance and the maximum power generation power of the belt pulley motor when the charge state of the power battery is smaller than or equal to the first set value or when the discharge power of the power battery is smaller than or equal to the second set value.
8. The vehicle power generation control system of claim 7, wherein the second determination module is further configured to: comparing the total power of the electric appliance with the maximum power of the belt pulley motor; and if the total power consumption of the electric appliances is larger than the maximum power generation power of the belt pulley motor, taking the maximum power generation power of the belt pulley motor as the actual power generation power of the belt pulley motor, and limiting the power consumption of each electric appliance according to a set rule.
9. The vehicle power generation control system according to claim 8, wherein the second determination module is further configured to calculate a sum of the total electric power of the electric consumer and the maximum charging power of the power battery, when the total electric power of the electric consumer is less than or equal to the maximum electric power of the pulley motor, and take a minimum value of the sum and the maximum electric power of the pulley motor as the actual electric power of the pulley motor.
10. A vehicle comprising the vehicle power generation control system according to any one of claims 7 to 9.
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