CN111055724B - Energy management system and method for pure electric automobile, vehicle and storage medium - Google Patents
Energy management system and method for pure electric automobile, vehicle and storage medium Download PDFInfo
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- CN111055724B CN111055724B CN201911399744.4A CN201911399744A CN111055724B CN 111055724 B CN111055724 B CN 111055724B CN 201911399744 A CN201911399744 A CN 201911399744A CN 111055724 B CN111055724 B CN 111055724B
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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
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/12—Recording operating variables ; Monitoring of operating variables
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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
- B60L2240/42—Drive Train control parameters related to electric machines
- B60L2240/421—Speed
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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
- B60L2240/42—Drive Train control parameters related to electric machines
- B60L2240/423—Torque
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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
- B60L2260/00—Operating Modes
- B60L2260/40—Control modes
- B60L2260/50—Control modes by future state prediction
- B60L2260/52—Control modes by future state prediction drive range estimation, e.g. of estimation of available travel distance
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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
- B60L2260/00—Operating Modes
- B60L2260/40—Control modes
- B60L2260/50—Control modes by future state prediction
- B60L2260/54—Energy consumption estimation
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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Abstract
The invention discloses an energy management system and method of a pure electric vehicle, a vehicle and a storage medium, wherein the energy management system comprises an energy management module and an input module connected with the energy management module; when the SOC value of the battery is larger than or equal to a preset threshold value, the energy management module outputs a final driving torque value based on the driving torque value calculated by the driving torque calculation unit and the safety torque limit value calculated by the protection unit; when the SOC value of the battery is smaller than a preset threshold value, the energy management module outputs a final driving torque value based on the driving torque value calculated by the driving torque calculation unit, the safety torque limit value calculated by the protection unit and the maximum torque limit value calculated by the driving torque calculation unit of the remaining mileage of the latest charging station. The invention can ensure that the user can safely arrive at the charging station in the residual SOC.
Description
Technical Field
The invention belongs to the technical field of energy management control of pure electric vehicles, and particularly relates to an energy management system and method of a pure electric vehicle, a vehicle and a storage medium.
Background
Energy management of the pure electric vehicle is one of the most important control parameters in the running process of the pure electric vehicle. With the wider and wider use of pure electric vehicles, the demand for energy management is also greater and greater. At present, energy management of a pure electric vehicle is based on the characteristics of the vehicle, an energy management control strategy of the pure electric vehicle is optimized, the energy management control strategy of the pure electric vehicle is only an energy optimization control strategy of the pure electric vehicle considered from a component level, and the problem of real-time use environment is not considered from a user level by a system. For example, the energy management method for the driving system of the electric vehicle disclosed in the patent application No. 201610369523.2 only aims to limit and protect the torque and the voltage of the battery of the electric vehicle, and prevent the hardware of the battery and the electric vehicle from being damaged when the driving output power is too large. Also, as for the energy management of the electric vehicle disclosed in patent application No. 201710192465.5, compared with the previous patent, the energy management of the electric vehicle is updated, on the basis of the hardware boundary protection condition, classification protection is performed on the battery SOC based on different power consumption modes, and when the battery SOC is low, the use power of the high-power electric device is limited. But no energy management optimization strategy is considered for the actual usage needs of the customer.
Therefore, there is a need to develop a new energy management system, method, vehicle and storage medium for pure electric vehicles.
Disclosure of Invention
The invention aims to provide an energy management system, an energy management method, a vehicle and a storage medium of a pure electric vehicle, which can ensure that a user can safely reach a charging station in the residual SOC.
The energy management system of the pure electric vehicle comprises an energy management module and an input module connected with the energy management module;
the input module includes:
a brake switch unit for detecting a brake switch signal;
the speed detection unit is used for detecting a vehicle speed signal of the whole vehicle;
the gear detection unit is used for detecting a gear signal of the whole vehicle;
the accelerator pedal unit is used for detecting an accelerator pedal stroke signal;
the motor maximum torque and discharge current unit is used for limiting the real-time maximum output torque and the discharge current of the motor;
a battery maximum discharge cutoff voltage, current unit for battery maximum discharge cutoff voltage and current limit;
the battery SOC unit is used for detecting a real-time SOC value of the battery;
the nearest charging station distance detection unit is used for outputting the distance between the whole vehicle and the nearest charging station;
the energy management module includes:
the protection unit is used for calculating a safety torque limit value based on information output by the brake switch unit, the speed detection unit, the gear detection unit, the accelerator pedal unit, the motor maximum torque and discharge current unit, the battery maximum discharge cutoff voltage, the current unit and the battery SOC unit;
the driving torque calculation unit calculates a driving torque value based on information output by the brake switch unit, the speed detection unit, the gear detection unit, the accelerator pedal unit, the motor maximum torque and discharge current unit, the battery maximum discharge cutoff voltage, the current unit and the battery SOC unit;
the nearest charging station remaining mileage driving torque calculation unit calculates a maximum torque limit value based on the nearest charging station distance and the average vehicle speed of the vehicle;
when the SOC value of the battery is larger than or equal to a preset threshold value, the energy management module outputs a final driving torque value based on the driving torque value calculated by the driving torque calculation unit and the safety torque limit value calculated by the protection unit;
and when the SOC value of the battery is smaller than a preset threshold value, the energy management module outputs a final driving torque value based on the driving torque value calculated by the driving torque calculation unit, the safety torque limit value calculated by the protection unit and the maximum torque limit value calculated by the driving torque calculation unit of the remaining mileage of the nearest charging station.
Further, the nearest charging station remaining mileage driving torque calculation unit further calculates the maximum output power based on the nearest charging station distance and the average vehicle speed of the vehicle.
The invention relates to an energy management method of a pure electric vehicle, which adopts the energy management system of the pure electric vehicle, and the method comprises the following steps:
when the SOC value of the battery is larger than or equal to a preset threshold value, the driving torque calculation unit calculates a driving torque value, the protection unit calculates a safety torque limit value, and the energy management module takes the smaller value of the driving torque value and the safety torque limit value as a final driving torque value;
when the SOC value of the battery is smaller than a preset threshold value, the driving torque calculation unit calculates a driving torque value, the protection unit calculates a safety torque limit value, the driving torque calculation unit of the remaining mileage of the nearest charging station calculates a maximum torque limit value, and the energy management module takes the minimum value of the driving torque value, the safety torque limit value and the maximum torque limit value as a final driving torque value.
Further, when the battery SOC value is smaller than a preset threshold value, the latest charging station remaining mileage driving torque calculation unit further calculates the maximum output power based on the latest charging station distance and the average vehicle speed of the vehicle.
The maximum torque limit value is calculated based on the nearest charging station distance, the average vehicle speed of the vehicle, the battery electric quantity, the battery voltage and the motor rotating speed, and the specific calculation process is as follows:
in the formula: m is a group of 2 The maximum torque limit value is obtained, Q is the battery electric quantity, U is the battery voltage, v is the average speed of the vehicle, n is the motor rotating speed, and S is the nearest charging station distance;
the maximum output power is calculated based on the nearest charging station distance, the average vehicle speed of the vehicle, the battery electric quantity and the battery voltage, and the specific calculation formula is as follows:
in the formula: p is the maximum output power.
The storage medium stores a computer readable program, and when the computer readable program is called by a controller to be executed, the steps of the energy management method of the pure electric vehicle according to the invention can be implemented.
The vehicle provided by the invention adopts the energy management system of the pure electric vehicle.
The invention has the following advantages: it has both taken into account prior art to the interior battery of pure electric vehicles, the protection of electrical apparatus such as motor, has considered the customer again in the in-service use, when battery SOC is in the lower value, if continue according to great motor torque output, lead to the battery to discharge too fast, and then make the unable problem that reaches the charging station and charge of pure electric whole car. The method solves the problem that the pure electric vehicle user is anxious about the remaining mileage (for example, how much electricity is used by the battery at the bottom, the battery needs to be charged, and the battery cannot come in time). The method helps the user to manage the remaining mileage energy of the whole vehicle from the perspective of the whole vehicle, and ensures that the user can safely reach the charging station in the remaining preset SOC.
Drawings
FIG. 1 is a functional block diagram of the present invention;
FIG. 2 is a flow chart of the present invention;
in the figure, 1-an input module, 1 a-a brake switch unit, 1 b-a speed detection unit, 1 c-a gear detection unit, 1 d-an accelerator pedal unit, 1 e-a motor maximum torque, a discharge current unit, 1 f-a battery maximum discharge cutoff voltage, a current unit, 1 g-a battery SOC unit, 1 h-a nearest charging station distance detection unit, 2-an energy management module, 2 a-a protection unit, 2 b-a driving torque calculation unit and 2 c-a nearest charging station remaining mileage driving torque calculation unit.
Detailed Description
The invention will be further explained with reference to the drawings.
As shown in fig. 1, an energy management system of a pure electric vehicle includes an energy management module 2 and an input module 1 connected to the energy management module 2.
As shown in fig. 1, the input module 1 includes:
a brake switch unit 1a for detecting a brake switch signal;
the speed detection unit 1b is used for detecting a vehicle speed signal of the whole vehicle;
the gear detection unit 1c is used for detecting a gear signal of the whole vehicle;
the accelerator pedal unit 1d is used for detecting an accelerator pedal travel signal;
the motor maximum torque and discharge current unit 1e is used for limiting the real-time maximum output torque and the discharge current of the motor;
a battery maximum discharge cutoff voltage, current unit 1f for battery maximum discharge cutoff voltage and current limitation;
a battery SOC unit 1g for detecting a real-time SOC value of the battery;
a nearest charging station distance detection unit 1h for outputting the distance from the whole vehicle to the nearest charging station;
as shown in fig. 2, the energy management module 2 includes:
the protection unit 2a is used for calculating a safety torque limit value based on information output by the brake switch unit 1a, the speed detection unit 1b, the gear detection unit 1c, the accelerator pedal unit 1d, the motor maximum torque and discharge current unit 1e, the battery maximum discharge cutoff voltage, the current unit 1f and the battery SOC unit 1 g;
a driving torque calculation unit 2b that calculates a driving torque value based on information output from the brake switch unit 1a, the speed detection unit 1b, the shift detection unit 1c, the accelerator pedal unit 1d, the motor maximum torque and discharge current unit 1e, the battery maximum discharge cutoff voltage, the current unit 1f, and the battery SOC unit 1 g;
a latest charging station remaining mileage drive torque calculation unit 2c that calculates a maximum torque limit value based on the latest charging station distance and the average vehicle speed of the vehicle;
when the battery SOC value is greater than or equal to the preset threshold, the energy management module 2 outputs a final driving torque value based on the driving torque value calculated by the driving torque calculation unit 2b and the safety torque limit value calculated by the protection unit 2 a;
when the battery SOC value is smaller than the preset threshold, the energy management module 2 outputs a final driving torque value based on the driving torque value calculated by the driving torque calculation unit 2b, the safety torque limit value calculated by the protection unit 2a, and the maximum torque limit value calculated by the driving torque calculation unit 2c of the remaining mileage of the nearest charging station. And the energy management module 2 sends the final driving torque value to the motor controller to control the driving running of the whole vehicle.
In this embodiment, the nearest charging station remaining mileage driving torque calculation unit 2c further calculates the maximum output power based on the nearest charging station distance and the average vehicle speed of the vehicle.
Taking the preset threshold value as 20% as an example, when the SOC of the battery is more than or equal to 20%, the driver can normally drive the pure electric vehicle at will within the hardware reliability range, and the requirements on the dynamic property and the drivability can be met in the largest range; when the battery SOC is less than 20%, the driving torque calculating unit 2c calculates the maximum torque limit and the maximum output power of the electric vehicle motor based on the distance between the nearest charging station and the average speed of the vehicle; the electric vehicle can reach the nearest charging station. Therefore, the situation that a user uses the motor with high power continuously and discharges with high current to cause the battery to reach the discharge cut-off voltage and break down and stop can be avoided.
As shown in fig. 2, an energy management method of a pure electric vehicle adopts the energy management system of the pure electric vehicle described in this embodiment, and the method includes the following steps:
when the battery SOC value is greater than or equal to the preset threshold, the driving torque calculation unit 2b calculates the driving torque value, the protection unit 2a calculates the safety torque limit value, and the energy management module 2 takes the smaller of the driving torque value and the safety torque limit value as the final driving torque value and outputs the final driving torque value. The user can normally drive according to the usual driving style, and the dynamic property, the driving property and the like of the normal driving of the user are not influenced.
When the SOC value of the battery is smaller than a preset threshold value, the driving torque calculating unit 2b calculates a driving torque value, the protection unit 2a calculates a safety torque limit value, and the remaining mileage driving torque calculating unit 2c of the latest charging station calculates a maximum torque limit value; the energy management module 2 takes the minimum value among the driving torque value, the safety torque limit value and the maximum torque limit value as a final driving torque value and outputs the final driving torque value. The driving anxiety caused by the fact that a user cannot reach a charging station due to worry about high-power discharging when the user runs at the low SOC stage of the battery is effectively solved, an active solution is provided for a pure electric vehicle user from the perspective of a whole vehicle, and the use confidence of the user on the pure electric vehicle can be effectively improved.
In this embodiment, the driving torque calculating unit 2c for the remaining mileage of the nearest charging station calculates the maximum torque limit and the maximum output power of the electric vehicle motor based on the distance between the nearest charging station and the average vehicle speed of the vehicle. The maximum torque limit value is calculated based on the nearest charging station distance, the average vehicle speed of the vehicle, the battery electric quantity, the battery voltage and the motor rotating speed, and the specific calculation process is as follows:
in the formula: m 2 Is the maximum torque limit (i.e., the driving torque of the last mileage of the charging station), Q is the battery charge, and U is the battery voltageV is the average speed of the vehicle (i.e. the average running speed of the whole vehicle), n is the rotating speed of the motor, and S is the distance between the nearest charging stations (i.e. the remaining mileage from the pure electric vehicle to the nearest charging stations).
The maximum output power is calculated based on the nearest charging station distance, the average vehicle speed of the vehicle, the battery electric quantity and the battery voltage, and the specific calculation formula is as follows:
in the formula: p is the maximum output power.
In this embodiment, a storage medium stores a computer readable program, and when the computer readable program is called and executed by a controller, the steps of the energy management method for a pure electric vehicle as described in this embodiment can be implemented.
In this embodiment, a vehicle adopts the energy management system of the pure electric vehicle as described in this embodiment.
Claims (7)
1. The utility model provides a pure electric vehicles's energy management system which characterized in that: the system comprises an energy management module (2) and an input module (1) connected with the energy management module (2);
the input module (1) comprises:
a brake switch unit (1 a) for detecting a brake switch signal;
the speed detection unit (1 b) is used for detecting a vehicle speed signal of the whole vehicle;
the gear detection unit (1 c) is used for detecting a gear signal of the whole vehicle;
an accelerator pedal unit (1 d) for detecting an accelerator pedal stroke signal;
the motor maximum torque and discharge current unit (1 e) is used for limiting the real-time maximum output torque and the discharge current of the motor;
a battery maximum discharge cutoff voltage, current unit (1 f) for battery maximum discharge cutoff voltage and current limiting;
a battery SOC unit (1 g) for detecting a real-time SOC value of the battery;
a nearest charging station distance detection unit (1 h) for outputting the distance from the whole vehicle to the nearest charging station;
the energy management module (2) comprises:
the protection unit (2 a) calculates a safety torque limit value based on information output by the brake switch unit (1 a), the speed detection unit (1 b), the gear detection unit (1 c), the accelerator pedal unit (1 d), the motor maximum torque and discharge current unit (1 e), the battery maximum discharge cutoff voltage, the current unit (1 f) and the battery SOC unit (1 g);
a driving torque calculation unit (2 b) which calculates a driving torque value based on information output by the brake switch unit (1 a), the speed detection unit (1 b), the gear detection unit (1 c), the accelerator pedal unit (1 d), the motor maximum torque and discharge current unit (1 e), the battery maximum discharge cutoff voltage, the current unit (1 f) and the battery SOC unit (1 g);
a latest charging station remaining mileage drive torque calculation unit (2 c) that calculates a maximum torque limit value based on the latest charging station distance and the average vehicle speed of the vehicle;
when the SOC value of the battery is larger than or equal to a preset threshold value, the energy management module (2) outputs a final driving torque value based on the driving torque value calculated by the driving torque calculation unit (2 b) and the safety torque limit value calculated by the protection unit (2 a);
when the SOC value of the battery is smaller than a preset threshold value, the energy management module (2) outputs a final driving torque value based on the driving torque value calculated by the driving torque calculation unit (2 b), the safety torque limit value calculated by the protection unit (2 a) and the maximum torque limit value calculated by the driving torque calculation unit (2 c) of the remaining mileage of the nearest charging station.
2. The energy management system of the pure electric vehicle of claim 1, characterized in that: the nearest charging station remaining mileage driving torque calculation unit (2 c) further calculates the maximum output power based on the nearest charging station distance and the average vehicle speed of the vehicle.
3. The energy management method of the pure electric vehicle is characterized by comprising the following steps: the energy management system of the pure electric vehicle as claimed in claim 1 or 2, wherein the method comprises the following steps:
when the SOC value of the battery is larger than or equal to a preset threshold value, the driving torque calculation unit (2 b) calculates a driving torque value, the protection unit (2 a) calculates a safety torque limit value, and the energy management module (2) takes the smaller value of the driving torque value and the safety torque limit value as a final driving torque value;
when the SOC value of the battery is smaller than a preset threshold value, the driving torque calculation unit (2 b) calculates a driving torque value, the protection unit (2 a) calculates a safety torque limit value, the remaining mileage driving torque calculation unit (2 c) of the nearest charging station calculates a maximum torque limit value, and the energy management module (2) takes the minimum value of the driving torque value, the safety torque limit value and the maximum torque limit value as a final driving torque value.
4. The energy management method of the pure electric vehicle according to claim 3, characterized in that: the nearest charging station remaining mileage driving torque calculation unit (2 c) further calculates the maximum output power based on the nearest charging station distance and the average vehicle speed of the vehicle when the battery SOC value is less than a preset threshold value.
5. The energy management method of the pure electric vehicle according to claim 4, characterized in that: the maximum torque limit value is calculated based on the nearest charging station distance, the average vehicle speed of the vehicle, the battery electric quantity, the battery voltage and the motor rotating speed, and the specific calculation process is as follows:
in the formula:
is the maximum torque limit value for the torque converter,
is the amount of the battery power,
is the voltage of the battery and is,
the average speed of the vehicle is the average speed of the vehicle,
is the rotating speed of the motor, and the rotating speed of the motor,
the closest charging station distance;
the maximum output power is calculated based on the nearest charging station distance, the average vehicle speed of the vehicle, the battery electric quantity and the battery voltage, and the specific calculation formula is as follows:
in the formula:
is the maximum output power.
6. A storage medium, characterized by: the energy management system is provided with a computer readable program stored therein, and the computer readable program can realize the steps of the energy management method of the pure electric vehicle according to any one of claims 3 to 5 when being invoked by the controller.
7. A vehicle, characterized in that: the energy management system of the pure electric vehicle as claimed in claim 1 or 2.
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