CN112440822B - Method and device for determining feedback power of electric automobile and electric automobile - Google Patents
Method and device for determining feedback power of electric automobile and electric automobile Download PDFInfo
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- CN112440822B CN112440822B CN201910795149.6A CN201910795149A CN112440822B CN 112440822 B CN112440822 B CN 112440822B CN 201910795149 A CN201910795149 A CN 201910795149A CN 112440822 B CN112440822 B CN 112440822B
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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
- B60L7/00—Electrodynamic brake systems for vehicles in general
- B60L7/10—Dynamic electric regenerative braking
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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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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a method and a device for determining feedback power of an electric automobile and the electric automobile. The method for determining the feedback power of the electric automobile comprises the steps of judging the type of the feedback power according to a battery management system BMS; generating a coupling switching strategy according to the feedback power type; and coupling the maximum allowable feedback power by the motor controller MCU according to the coupling switching strategy. The embodiment of the invention comprehensively considers the balance of the safety, the ride comfort and the economy of the battery. The battery is ensured to be in a safe working range by taking the energy integral percentage as a threshold value of power switching, the effective implementation of a power switching strategy is ensured by different percentage gradients and time gradients, and the driving feeling of drivers and passengers is ensured while large feedback power is ensured to be output as far as possible.
Description
Technical Field
The invention relates to the field of electric vehicle dynamics control, in particular to a method and a device for determining feedback power of an electric vehicle and the electric vehicle.
Background
Nowadays, with rapid development of technology, electric vehicles are becoming more and more popular due to increasing demand of vehicles and lack of non-renewable energy. For electric vehicles, battery endurance is an important measure of their performance.
The maximum allowable feedback power of the electric vehicle is limited under the full-charge or high-charge state, for example, in "a method, an apparatus and a vehicle for adjusting the feedback power of the electric vehicle" (application publication No. CN 108790876A): "the most widely used protection method for high SOC stage at present is to feed back 0kw of power in high SOC stage, i.e. to prohibit energy recovery. The feedback power is gradually increased along with the running of the vehicle and the consumption of the electric quantity. However, the scheme cannot fully exert the energy recovery potential of the high-charge section, the energy recovery rate is low, and the invention is developed by aiming at the problem.
Disclosure of Invention
The embodiment of the invention provides a method and a device for determining feedback power of an electric automobile and the electric automobile, and aims to solve the problems that the energy recovery potential of a high-charge section cannot be fully exerted and the energy recovery rate is low in the prior art.
In order to solve the above technical problem, an embodiment of the present invention provides a method for determining feedback power of an electric vehicle, including:
judging the feedback power type according to a battery management system BMS;
generating a coupling switching strategy according to the feedback power type;
and coupling the maximum allowable feedback power by the motor controller MCU according to the coupling switching strategy.
Further, the determining the feedback power type according to the battery management system BMS includes:
the battery management system BMS acquires feedback power types;
the feedback power types include: 15 seconds of feedback power, 30 seconds of feedback power and continuous power;
wherein 15 second feedback power >30 second feedback power > continuous power.
Further, generating a coupling switching strategy according to the feedback power type, comprising:
and generating at least one of the power switching strategies of the first stage, the second stage, the third stage, the fourth stage and the fifth stage according to the feedback power type.
Further, generating the power switching strategy of the first stage according to the feedback power type includes:
acquiring the 15-second energy integral percentage in real time;
the default output power is 15 seconds of feedback power, and when the 15 seconds of energy integral percentage is smaller than a first threshold value, the output power keeps 15 seconds of feedback power;
when the 15 second energy integration percentage reaches a first threshold value, the output power enters a transition state;
decreasing from 15 seconds of feedback power to 30 seconds of feedback power at a first percentage gradient as the percentage of the 15 second energy integral increases;
when the 15 second energy integration percentage reaches a second threshold value, the output power is reduced to 30 second feedback power;
wherein the first threshold is less than the second threshold.
Further, the acquiring 15 second energy integration percentage comprises:
by the formula:
obtaining the actual feedback power of the battery;
integrating the actual feedback power of the battery from 15 seconds before the current time to obtain the actual feedback energy of 15 seconds;
multiplying the 15-second maximum allowable feedback power input by the battery management system by 15 seconds to obtain maximum allowable feedback energy;
dividing the 15-second actual feedback energy by the 15-second maximum allowable feedback energy to obtain a 15-second energy integral percentage;
wherein, the maximum allowable feedback power for 15 seconds is a fixed value, P is power, the unit is W, n is the motor rotating speed, the unit is r/min, T is the motor torque, and the unit is Nm.
Further, generating the power switching strategy of the second stage according to the feedback power type includes:
acquiring the 30-second energy integral percentage in real time;
when the 30 second energy integration percentage reaches the third threshold, the output power decreases from the 30 second feedback power with a second percentage gradient as the percentage increases until the power continues.
Further, obtaining a 30 second energy integration percentage comprises:
integrating the actual feedback power of the battery from 30 seconds before the current moment to obtain the actual feedback energy of 30 seconds;
multiplying the 30-second maximum allowable feedback power input by the battery management system by 30 to obtain 30-second maximum allowable feedback energy;
dividing the actual feedback energy of 30 seconds by the maximum allowable feedback energy of 30 seconds to obtain the integral percentage of the energy of 30 seconds;
wherein the maximum allowable feedback power for 30 seconds is a constant value.
Further, generating the power switching strategy of the third stage according to the feedback power type includes:
when the 30 second energy integration percentage reaches the third threshold and the 15 second energy integration percentage does not reach the first threshold, decreasing in a third percentage gradient as the 30 second energy integration percentage increases until the power is sustained.
Further, generating the power switching strategy of the fourth stage according to the feedback power type includes:
after the output power is reduced to 30 seconds of feedback power, and when the 15 second energy integration percentage is zero, the power is increased to 15 seconds of feedback power at a first time gradient.
Further, generating the power switching strategy of the fifth stage according to the feedback power type includes:
and when the output power is reduced to the continuous power, entering a power recovery state, and increasing the power to 15 seconds of feedback power in a second time gradient.
Further, the coupling the maximum allowable feedback power out of the MCU according to the coupling switching strategy includes:
and coupling the maximum allowable feedback power by the MCU according to at least one of the power switching strategies of the first stage, the second stage, the third stage, the fourth stage and the fifth stage.
The embodiment of the invention also provides a device for determining the feedback power of the electric automobile, which comprises:
the judging module judges the feedback power type according to the battery management system BMS;
the generating module is used for generating a coupling switching strategy according to the feedback power type;
and the coupling module is used for coupling the maximum allowable feedback power out of the motor controller MCU according to the coupling switching strategy.
The embodiment of the invention also provides a device for determining the feedback power of the electric automobile, which comprises: the processor and the memory are stored with programs executable by the processor, and when the processor executes the programs, the steps of the method are realized.
The embodiment of the invention also provides an electric automobile which comprises the device for determining the feedback power of the electric automobile.
The scheme of the invention at least has the following technical effects:
the invention comprehensively considers the balance of the battery safety, the driving smoothness and the economy. The battery is ensured to be in a safe working range by taking the energy integral percentage as a threshold value of power switching, the effective implementation of a power switching strategy is ensured by different percentage gradients and time gradients, and the driving feeling of drivers and passengers is ensured while large feedback power is ensured to be output as far as possible. If the smoothness priority is low on certain vehicle types, higher economy can be ensured by adjusting the first percentage gradient, the second percentage gradient, the third percentage gradient, the first time gradient and the second time gradient during power switching. Or the battery boundary is further released, and more feedback energy can be output by adjusting the first threshold, the second threshold and the third threshold. The coupling power can move to the high-power section within a certain range, but only can move to the low-power section in the prior art, so that the coupling power is ensured to stay at the high power for as long as possible, and more feedback energy is obtained.
Drawings
Fig. 1 is a schematic flow chart illustrating a method for determining feedback power of an electric vehicle according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a battery charging process according to an embodiment of the present invention;
FIG. 3 shows a flow chart of an embodiment of the present invention;
fig. 4 is a schematic diagram of a power switching strategy according to 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 described in detail with reference to the accompanying drawings and specific embodiments.
The invention provides a method and a device for determining feedback power of an electric vehicle and the electric vehicle, aiming at the problems that the energy recovery potential of a high-charge section cannot be fully exerted and the energy recovery rate is low in the prior art.
As shown in fig. 1, the method for determining feedback power of an electric vehicle according to an embodiment of the present invention includes:
and step 300, coupling the maximum allowable feedback power by the motor controller MCU according to the coupling switching strategy.
As shown in fig. 2, the battery management system BMS of the electric vehicle may generate 15 second charging power and 30 second charging power, which are 15 second and 30 second maximum allowable charging powers, i.e., 15 second feedback power and 30 second feedback power, respectively, for continuously charging the battery, in addition to the long-term continuous maximum allowable charging power P. An embodiment of the present invention is shown in FIG. 3.
In an embodiment of the present invention, the step 100 may include:
step 101, a battery management system BMS acquires feedback power types;
step 102, the feedback power types include: 15 seconds of feedback power, 30 seconds of feedback power and continuous power;
wherein 15 second feedback power >30 second feedback power > continuous power.
In an embodiment of the present invention, as shown in fig. 4, the step 200 may include:
and generating at least one of the power switching strategies of the first stage, the second stage, the third stage, the fourth stage and the fifth stage according to the feedback power type.
Step 201, generating the power switching strategy of the first stage according to the feedback power type, including:
acquiring the 15-second energy integral percentage in real time;
the default output power is 15 seconds of feedback power, and when the 15 seconds of energy integral percentage is smaller than a first threshold value, the output power keeps 15 seconds of feedback power;
when the 15 second energy integration percentage reaches a first threshold value, the output power enters a transition state;
decreasing from 15 seconds of feedback power to 30 seconds of feedback power at a first percentage gradient as the percentage of the 15 second energy integral increases;
when the 15 second energy integration percentage reaches a second threshold value, the output power is reduced to 30 second feedback power;
it should be noted that the first threshold is smaller than the second threshold;
it should be further noted that, in an embodiment of the present invention, the acquiring a percentage of the 15-second energy integration includes:
by the formula:
obtaining the actual feedback power of the battery;
integrating the actual feedback power of the battery from 15 seconds before the current time to obtain the actual feedback energy of 15 seconds;
multiplying the 15-second maximum allowable feedback power input by the battery management system by 15 seconds to obtain maximum allowable feedback energy;
dividing the 15-second actual feedback energy by the 15-second maximum allowable feedback energy to obtain a 15-second energy integral percentage;
wherein, the maximum allowable feedback power for 15 seconds is a fixed value, P is power, the unit is W, n is the motor rotating speed, the unit is r/min, T is the motor torque, and the unit is Nm.
Step 202, generating the power switching strategy of the second stage according to the feedback power type, including:
acquiring the 30-second energy integral percentage in real time;
when the 30 second energy integration percentage reaches a third threshold, the output power is reduced from the 30 second feedback power to the continuous power in a second percentage gradient along with the increase of the percentage;
in an embodiment of the present invention, obtaining the percentage of the 30-second energy integration includes:
integrating the actual feedback power of the battery from 30 seconds before the current moment to obtain the actual feedback energy of 30 seconds;
multiplying the 30-second maximum allowable feedback power input by the battery management system by 30 to obtain 30-second maximum allowable feedback energy;
dividing the actual feedback energy of 30 seconds by the maximum allowable feedback energy of 30 seconds to obtain the integral percentage of the energy of 30 seconds;
wherein the maximum allowable feedback power for 30 seconds is a constant value.
Step 203, generating the power switching strategy of the third stage according to the feedback power type, including:
when the 30 second energy integration percentage reaches the third threshold and the 15 second energy integration percentage does not reach the first threshold, decreasing in a third percentage gradient as the 30 second energy integration percentage increases until the power is sustained.
Step 204, generating the power switching strategy of the fourth stage according to the feedback power type, including:
after the output power is reduced to 30 seconds of feedback power, and when the 15 second energy integration percentage is zero, the power is increased to 15 seconds of feedback power at a first time gradient.
Step 205, generating the power switching strategy of the fifth stage according to the feedback power type, including:
and when the output power is reduced to the continuous power, entering a power recovery state, and increasing the power to 15 seconds of feedback power in a second time gradient.
In the embodiment of the invention, effective implementation of the power switching strategy is ensured through different percentage gradients and time gradients, and drivers and passengers are ensured not to have obvious discomfort while larger feedback power is ensured to be output as far as possible. If the smoothness priority is low on certain vehicle types, higher economy can be ensured by adjusting the first percentage gradient, the second percentage gradient, the third percentage gradient, the first time gradient and the second time gradient during power switching. Or the battery boundary is further released, and more feedback energy can be output by adjusting the first threshold, the second threshold and the third threshold.
In an embodiment of the present invention, the step 300 may include:
and coupling the maximum allowable feedback power by the MCU according to at least one of the power switching strategies of the first stage, the second stage, the third stage, the fourth stage and the fifth stage.
According to the embodiment of the invention, the battery is ensured to be in a safe working range by taking the energy integral percentage as the threshold value of power switching. The effective implementation of the power switching strategy is ensured through different percentage gradients and time gradients, the driving feeling of drivers is ensured while the output of larger feedback power is ensured as much as possible, the subsequent adjustment optimization space is larger, and if the smoothness priority is lower on certain vehicle types, higher economy is ensured by adjusting the first percentage gradient, the second percentage gradient, the third percentage gradient, the first time gradient and the second time gradient during power switching. Or the battery boundary is further released, and more feedback energy can be output by adjusting the first threshold, the second threshold and the third threshold. The coupling power can move to the high-power section within a certain range, but only can move to the low-power section in the prior art, so that the coupling power is ensured to stay at the high power for as long as possible, and more feedback energy is obtained.
The embodiment of the invention also provides a device for determining the feedback power of the electric automobile, which comprises:
the judging module 10 judges the feedback power type according to the battery management system BMS;
a generating module 20, configured to generate a coupling switching policy according to the feedback power type;
and the coupling module 30 is used for coupling the maximum allowable feedback power out of the motor controller MCU according to the coupling switching strategy.
Specifically, the determining module 10 includes:
the first obtaining submodule obtains feedback power;
the judgment submodule judges the type of the feedback power;
the feedback power types include: 15 seconds of feedback power, 30 seconds of feedback power and continuous power;
wherein 15 second feedback power >30 second feedback power > continuous power.
Specifically, the generating module 20 includes:
the second acquisition submodule acquires the 15-second energy integral percentage;
the first generation submodule generates a power switching strategy in a first stage;
the third acquisition submodule acquires the energy integral percentage of 30 seconds;
the second generation submodule generates a power switching strategy at a second stage;
a third generation submodule for generating a power switching strategy of a third stage;
a fourth generation submodule for generating a power switching strategy of a fourth stage;
a fifth generation submodule for generating a power switching strategy in a fifth stage;
optionally, the second obtaining sub-module is configured to:
acquiring the 15-second energy integral percentage in real time;
optionally, the first generation submodule is configured to generate the power switching strategy of the first phase, and includes:
the default output power is 15 seconds of feedback power, and when the 15 seconds of energy integral percentage is smaller than a first threshold value, the output power keeps 15 seconds of feedback power;
when the 15 second energy integration percentage reaches a first threshold value, the output power enters a transition state;
decreasing from 15 seconds of feedback power to 30 seconds of feedback power at a first percentage gradient as the percentage of the 15 second energy integral increases;
when the 15 second energy integration percentage reaches a second threshold value, the output power is reduced to 30 second feedback power;
wherein the first threshold is less than the second threshold;
optionally, the obtaining 15 second energy integration percentage comprises:
by the formula:
obtaining the actual feedback power of the battery;
integrating the actual feedback power of the battery from 15 seconds before the current time to obtain the actual feedback energy of 15 seconds;
multiplying the 15-second maximum allowable feedback power input by the battery management system by 15 seconds to obtain maximum allowable feedback energy;
dividing the 15-second actual feedback energy by the 15-second maximum allowable feedback energy to obtain a 15-second energy integral percentage;
wherein the maximum allowable feedback power in 15 seconds is a fixed value, P is power and has the unit of W, n is the rotating speed of the motor and has the unit of r/min, and T is the torque of the motor and has the unit of Nm;
optionally, the third obtaining sub-module is configured to:
acquiring the 30-second energy integral percentage in real time;
optionally, the second generation submodule is configured to generate a second stage power switching policy, and includes:
when the 30 second energy integration percentage reaches a third threshold, the output power is reduced from the 30 second feedback power to the continuous power in a second percentage gradient along with the increase of the percentage;
optionally, obtaining a 30 second energy integration percentage comprises:
integrating the actual feedback power of the battery from 30 seconds before the current moment to obtain the actual feedback energy of 30 seconds;
multiplying the 30-second maximum allowable feedback power input by the battery management system by 30 to obtain 30-second maximum allowable feedback energy;
dividing the actual feedback energy of 30 seconds by the maximum allowable feedback energy of 30 seconds to obtain the integral percentage of the energy of 30 seconds;
wherein, the maximum allowable feedback power of 30 seconds is a fixed value;
optionally, the third generation submodule is configured to generate a power switching strategy for the third stage, and includes:
decreasing in a third percentage gradient with increasing 30 second energy integration percentage until sustained power when the 30 second energy integration percentage reaches a third threshold and the 15 second energy integration percentage does not reach the first threshold;
optionally, the fourth generation submodule is configured to generate a fourth stage power switching policy, and includes:
after the output power is reduced to 30 seconds of feedback power, and when the 15 seconds of energy integral percentage is zero, the power is increased to the 15 seconds of feedback power by a first time gradient;
optionally, the fifth generation submodule is configured to generate a power switching strategy in the fifth stage, and includes:
and when the output power is reduced to the continuous power, entering a power recovery state, and increasing the power to 15 seconds of feedback power in a second time gradient.
In particular, the coupling module 30 is configured to:
and coupling the maximum allowable feedback power by the MCU according to at least one of the power switching strategies of the first stage, the second stage, the third stage, the fourth stage and the fifth stage.
The embodiment of the invention also provides a device for determining the feedback power of the electric automobile, which comprises:
the judging module judges the feedback power type according to the battery management system BMS;
the generating module is used for generating a coupling switching strategy according to the feedback power type;
and the coupling module is used for coupling the maximum allowable feedback power out of the motor controller MCU according to the coupling switching strategy.
The embodiment of the invention also provides a device for determining the feedback power of the electric automobile, which comprises: the processor and the memory are stored with programs executable by the processor, and when the processor executes the programs, the steps of the method are realized.
The embodiment of the invention also provides an electric automobile which comprises the device for determining the feedback power of the electric automobile.
According to the embodiment of the invention, the battery is ensured to be in the safe working range by taking the energy integral percentage as the threshold value of power switching; the effective implementation of the power switching strategy is ensured through different percentage gradients and time gradients, and the driving feeling of a driver is ensured while the output of larger feedback power is ensured as much as possible.
While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.
Claims (11)
1. A method for determining feedback power of an electric vehicle is characterized by comprising the following steps:
judging the feedback power type according to a battery management system BMS;
generating a coupling switching strategy according to the feedback power type;
coupling the maximum allowable feedback power by the motor controller MCU according to the coupling switching strategy;
the judging of the feedback power type according to the battery management system BMS includes:
the battery management system BMS acquires feedback power types;
the feedback power types include: 15 seconds of feedback power, 30 seconds of feedback power and continuous power;
wherein, 15 second feedback power is more than 30 second feedback power is more than continuous power;
generating a coupling switching strategy according to the feedback power type, comprising:
generating at least one of power switching strategies of a first stage, a second stage, a third stage, a fourth stage and a fifth stage according to the feedback power type;
generating the power switching strategy of the first stage according to the feedback power type, wherein the power switching strategy comprises the following steps:
acquiring the 15-second energy integral percentage in real time;
the default output power is 15 seconds of feedback power, and when the 15 seconds of energy integral percentage is smaller than a first threshold value, the output power keeps 15 seconds of feedback power;
when the 15 second energy integration percentage reaches a first threshold value, the output power enters a transition state;
decreasing from 15 seconds of feedback power to 30 seconds of feedback power at a first percentage gradient as the percentage of the 15 second energy integral increases;
when the 15 second energy integration percentage reaches a second threshold value, the output power is reduced to 30 second feedback power;
wherein the first threshold is less than the second threshold.
2. The method for determining feedback power of an electric vehicle as claimed in claim 1, wherein said obtaining a 15 second energy integration percentage comprises:
by the formula:
obtaining the actual feedback power of the battery;
integrating the actual feedback power of the battery from 15 seconds before the current time to obtain the actual feedback energy of 15 seconds;
multiplying the 15-second maximum allowable feedback power input by the battery management system by 15 seconds to obtain maximum allowable feedback energy;
dividing the 15-second actual feedback energy by the 15-second maximum allowable feedback energy to obtain a 15-second energy integral percentage;
wherein, the maximum allowable feedback power for 15 seconds is a fixed value, P is power, the unit is W, n is the motor rotating speed, the unit is r/min, T is the motor torque, and the unit is Nm.
3. The method for determining feedback power of an electric vehicle of claim 1, wherein generating the second stage power switching strategy according to the feedback power type comprises:
acquiring the 30-second energy integral percentage in real time;
when the 30 second energy integration percentage reaches the third threshold, the output power decreases from the 30 second feedback power with a second percentage gradient as the percentage increases until the power continues.
4. The method for determining feedback power of an electric vehicle as claimed in claim 3, wherein obtaining the percentage of the 30-second energy integration comprises:
integrating the actual feedback power of the battery from 30 seconds before the current moment to obtain the actual feedback energy of 30 seconds;
multiplying the 30-second maximum allowable feedback power input by the battery management system by 30 to obtain 30-second maximum allowable feedback energy;
dividing the actual feedback energy of 30 seconds by the maximum allowable feedback energy of 30 seconds to obtain the integral percentage of the energy of 30 seconds;
wherein the maximum allowable feedback power for 30 seconds is a constant value.
5. The method for determining feedback power of an electric vehicle of claim 1, wherein generating the power switching strategy of the third stage according to the feedback power type comprises:
when the 30 second energy integration percentage reaches the third threshold and the 15 second energy integration percentage does not reach the first threshold, decreasing in a third percentage gradient as the 30 second energy integration percentage increases until the power is sustained.
6. The method for determining feedback power of an electric vehicle of claim 1, wherein generating the power switching strategy of the fourth stage according to the feedback power type comprises:
after the output power is reduced to 30 seconds of feedback power, and when the 15 second energy integration percentage is zero, the power is increased to 15 seconds of feedback power at a first time gradient.
7. The method for determining feedback power of an electric vehicle of claim 1, wherein generating the power switching strategy in the fifth stage according to the feedback power type comprises:
and when the output power is reduced to the continuous power, entering a power recovery state, and increasing the power to 15 seconds of feedback power in a second time gradient.
8. The method for determining feedback power of an electric vehicle of claim 1, wherein the coupling the maximum allowable feedback power from the MCU according to the coupling switching strategy comprises:
and coupling the maximum allowable feedback power by the MCU according to at least one of the power switching strategies of the first stage, the second stage, the third stage, the fourth stage and the fifth stage.
9. An apparatus for determining feedback power of an electric vehicle, comprising:
the judging module judges the feedback power type according to the battery management system BMS;
the generating module is used for generating a coupling switching strategy according to the feedback power type;
the coupling module is used for coupling the motor controller MCU to output maximum allowable feedback power according to the coupling switching strategy;
the judging module comprises:
the first obtaining submodule obtains feedback power;
the judgment submodule judges the type of the feedback power;
the feedback power types include: 15 seconds of feedback power, 30 seconds of feedback power and continuous power;
wherein, 15 second feedback power is more than 30 second feedback power is more than continuous power;
the generation module comprises:
the second acquisition submodule acquires the 15-second energy integral percentage;
the first generation submodule generates a power switching strategy in a first stage;
the third acquisition submodule acquires the energy integral percentage of 30 seconds;
the second generation submodule generates a power switching strategy at a second stage;
a third generation submodule for generating a power switching strategy of a third stage;
a fourth generation submodule for generating a power switching strategy of a fourth stage;
a fifth generation submodule for generating a power switching strategy in a fifth stage;
the second obtaining sub-module is configured to:
acquiring the 15-second energy integral percentage in real time;
the first generation submodule is used for generating a power switching strategy of a first stage, and comprises:
the default output power is 15 seconds of feedback power, and when the 15 seconds of energy integral percentage is smaller than a first threshold value, the output power keeps 15 seconds of feedback power;
when the 15 second energy integration percentage reaches a first threshold value, the output power enters a transition state;
decreasing from 15 seconds of feedback power to 30 seconds of feedback power at a first percentage gradient as the percentage of the 15 second energy integral increases;
when the 15 second energy integration percentage reaches a second threshold value, the output power is reduced to 30 second feedback power;
wherein the first threshold is less than the second threshold.
10. An apparatus for determining feedback power of an electric vehicle, comprising: a processor, a memory, the memory having stored thereon a program executable by the processor, when executing the program, performing the steps of the method of any of claims 1 to 8.
11. An electric vehicle comprising the electric vehicle feedback power determination apparatus according to claim 10.
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| JPWO2012132435A1 (en) * | 2011-03-29 | 2014-07-24 | パナソニック株式会社 | Vehicle power supply |
| DE102011017260A1 (en) * | 2011-04-15 | 2012-10-18 | Volkswagen Aktiengesellschaft | Method for determining deceleration strategy of vehicle with electric drive during deceleration process, involves braking vehicle on predetermined section of speed to another reduced speed |
| FR2994027B1 (en) * | 2012-07-27 | 2015-06-19 | Renault Sa | VEHICLE COMPRISING A BATTERY AND MEANS FOR DETERMINING A MAXIMUM POWER ADMITABLE FOR THE BATTERY, AND METHOD THEREOF |
| DE102015006454A1 (en) * | 2015-05-19 | 2016-11-24 | Man Truck & Bus Ag | Method and control device for recuperation of energy in a hybrid vehicle |
| CN105186627A (en) * | 2015-10-12 | 2015-12-23 | 北京新能源汽车股份有限公司 | Power regulation method and device for electric automobile and electric automobile |
| CN107215239A (en) * | 2017-07-24 | 2017-09-29 | 澳特卡新能源科技（上海）有限公司 | A kind of batteries of electric automobile charge-discharge electric power guard method and system |
| CN108068631A (en) * | 2017-12-08 | 2018-05-25 | 国机智骏（北京）汽车科技有限公司 | Pure electric automobile and its energy back-feed control method, control device |
| CN108790876B (en) * | 2018-06-06 | 2020-08-04 | 北京新能源汽车股份有限公司 | Method and device for adjusting feedback power of electric automobile and automobile |
| CN108944572B (en) * | 2018-07-25 | 2021-01-15 | 北京新能源汽车股份有限公司 | Torque limiting method and device and electric automobile |
| CN109677271B (en) * | 2018-12-27 | 2020-09-29 | 潍柴动力股份有限公司 | Control method and device for fuel cell engine |
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