CN113910912A - Display method of power of electric automobile and vehicle-mounted electronic equipment - Google Patents
Display method of power of electric automobile and vehicle-mounted electronic equipment Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- 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
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on 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
- B60L7/00—Electrodynamic brake systems for vehicles in general
- B60L7/10—Dynamic electric regenerative braking
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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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Abstract
The invention provides a method for calculating and displaying instantaneous power, which comprises driving power and energy recovery power. And calculating the maximum power of the driving system and the available power of the battery according to the torque limit value of the motor, and calculating the residual available power. And limiting the maximum power of the driving system by considering the discharge capacity of the battery according to the available power of the battery, and calculating according to the temperature of the battery and the residual capacity. And calculating and displaying the instantaneous power of the braking energy recovery system according to the actual torque of the motor and the torque limit value of the motor. The invention outputs the power parameter in real time in a percentage mode, and more accurately reflects the specific state of the instantaneous power of the electric automobile.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of power display, in particular to a power display method of an electric automobile and vehicle-mounted electronic equipment.
[ background of the invention ]
According to the national standard of GB/T19836-2019 electric automobile instrument published in 10, 18 and 2020 in 2019, the electric automobile needs to indicate or display the instantaneous power output by a vehicle driving system in 5, 01 and 2020 in the beginning, and the available residual power of the vehicle driving system is indicated or displayed at the same time; it is also required to display the braking energy recovery system instantaneous power.
In response to the above-mentioned requirements of the national standard, most host plants use a calculation of the direct output of the electrical or mechanical power of the motor to display in the form of a progress bar. The method cannot accurately represent the specific state of the instantaneous power of the driving system, cannot accurately represent the specific state of the available residual power when the output capacity of the driving motor is limited due to the fact that a vehicle breaks down, and has no great reference significance for a driving system user. Braking recovery power also does not form a specific, accurate display method.
Therefore, the specific state of the instantaneous power of the electric automobile is more accurately reflected, the driving experience of the electric automobile is optimized, and the method is an important problem to be solved at present.
[ summary of the invention ]
The embodiment of the invention provides a display method of instantaneous power of an electric automobile and vehicle-mounted electronic equipment, which effectively embody the instantaneous power of the electric automobile, comprise available power and recovered power, improve the understanding and the cognition of a user on a vehicle product, and optimize the driving experience of the user.
In a first aspect, an embodiment of the present invention provides a method for displaying power of an electric vehicle, where the method includes outputting and displaying instantaneous power of a braking energy recovery system in percentage form in real time, where the instantaneous power of the braking energy recovery system is calculated by the following formula, and when the vehicle travels forward and is recovered by braking, the instantaneous power of the braking energy recovery system is obtained by the following formula: the instantaneous power of the braking energy recovery system is equal to the limit value multiplied by 100 of the actual torque of the motor/the reverse torque of the motor; when the vehicle runs backwards and the braking is recovered, the instantaneous power of the braking energy recovery system is equal to the actual torque of the motor/the limited value of the forward torque of the motor multiplied by 100%.
The two torque values are easy to obtain, the instantaneous power of the braking energy recovery system is represented by the two torque ratio values, and the method is a simple and effective method for representing the braking energy recovery.
In one possible design, the method for outputting and displaying in percentage form in real time comprises the step of directly displaying on an automobile instrument panel through numbers of 0-100%, or displaying on the automobile instrument panel through a progress bar. Generally, the consumer can more easily get an intuitive feeling and concept through the progress bar in the form of percentage or proportion, and the better driving experience can be brought to the consumer by displaying the power recovered by braking in the method.
In a second aspect, an embodiment of the present invention provides a method for displaying power of an electric vehicle, including driving a vehicle forward when the vehicle is driving forward, and obtaining an instantaneous power percentage P of a driving system according to the following formula: p ═ a/Min (B1, C) × 100%; when the vehicle runs backwards, the vehicle is driven reversely, and the instantaneous power percentage P of the driving system is obtained through the following formula: p ═ a/Min (B2, C) × 100%; wherein A is instantaneous power of a driving system, B1 is maximum forward power of the driving system, C is a discharge power limit value allowed by a battery, and B2 is maximum reverse power of the driving system; the available residual power of the driving system is 1-P; the driving system can output and display the residual power in percentage form in real time.
The allowable discharge power of the battery is taken into consideration, so that the calculated available residual power is more consistent with the actual situation.
In one possible design, the method for outputting and displaying in percentage form in real time comprises the step of directly displaying on an automobile instrument panel through numbers of 0-100%, or displaying on the automobile instrument panel through a progress bar. Generally, the consumer can more easily get an intuitive feeling and concept through the progress bar in the form of percentage or proportion, and the better driving experience can be brought to the consumer by displaying the power recovered by braking in the method.
In one possible design, the discharge power limit value C is a discharge power limit value that is allowed by the battery and is obtained in real time according to the temperature and the remaining capacity of the battery. The battery temperature and the remaining capacity are the most easily obtained data, and are effective and feasible methods for further obtaining the discharge power limit value.
In one possible design, the maximum forward power B1 of the driving system is calculated in real time according to the forward torque limit value and the rotating speed of the driving motor; and calculating the maximum reverse power B2 of the driving system in real time according to the reverse torque limit value and the rotating speed of the driving motor. The torque limit value of the motor is a basic parameter of the motor, the rotating speed is easy to obtain in real time, and the torque limit value is an effective and feasible basis for further obtaining the maximum power of the driving system.
In one possible design, the driving motor mechanical power is calculated in real time according to the actual torque and the rotating speed of the driving motor, and the instantaneous power A of the driving system is calculated. The actual torque is also an easily obtained parameter, and is an effective and feasible basis for further obtaining the instantaneous power of the driving system.
In a third aspect, an embodiment of the present invention provides an in-vehicle electronic device, including: the display module is used for outputting and displaying the instantaneous power of the braking energy recovery system in percentage form in real time; the judging module is used for judging whether the vehicle runs forwards or backwards and judging whether the vehicle is in a braking state; the calculating module is used for calculating the instantaneous power of the braking energy recovery system when the judging module judges that the vehicle runs forwards and is braked, and the instantaneous power of the braking energy recovery system is obtained through the following formula: the instantaneous power of the braking energy recovery system is equal to the limit value multiplied by 100 of the actual torque of the motor/the reverse torque of the motor; and the judging module is used for calculating the instantaneous power of the braking energy recovery system when the vehicle is judged to be driven backwards and braked, wherein the instantaneous power of the braking energy recovery system is equal to the actual torque of the motor/the forward torque limit value of the motor multiplied by 100%.
In a fourth aspect, an embodiment of the present invention provides an in-vehicle electronic device, including: when the vehicle runs forwards, the vehicle is driven forwards, and the instantaneous power percentage P of the driving system is obtained through the following formula: p ═ a/Min (B1, C) × 100%; when the vehicle runs backwards, the vehicle is driven reversely, and the instantaneous power percentage P of the driving system is obtained through the following formula: p ═ a/Min (B2, C) × 100%;
wherein A is instantaneous power of a driving system, B1 is maximum forward power of the driving system, C is a discharge power limit value allowed by a battery, and B2 is maximum reverse power of the driving system; the available residual power of the driving system is 1-P; the driving system can output and display the residual power in percentage form in real time.
In a fifth aspect, an embodiment of the present invention provides a non-transitory computer-readable storage medium storing computer instructions for causing the computer to perform any one of the methods according to the first and second aspects.
In a sixth aspect, an embodiment of the present invention provides an electronic device, including: at least one processor, at least one memory communicatively coupled to the processor, wherein: the memory stores program instructions executable by the processor, the processor invoking the program instructions to perform any of the methods of the first and second aspects.
It should be understood that the third to sixth aspects of the embodiment of the present invention are consistent with the technical solutions of the first and second aspects of the embodiment of the present invention, and the beneficial effects obtained by the aspects and the corresponding possible implementation manners are similar, and are not described again.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below, and the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic flow chart illustrating a power display method according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a vehicle-mounted electronic device according to an embodiment of the invention;
fig. 3 is a schematic diagram of an electronic device according to an embodiment of the invention.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings. It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
For the application of electric energy of electric vehicles, some electric vehicles have a function of recovering energy, for example, converting mechanical energy into electric energy to be recovered into a battery when braking. The recovery power is large or small according to the actual situation, and the display of the recovery power can enable a consumer to establish certain perception on the recovery of the energy. The embodiment of the invention provides a method for displaying the power of an electric automobile, which comprises the steps of outputting and displaying the instantaneous power of a braking energy recovery system in percentage mode in real time, wherein the instantaneous power of the braking energy recovery system is calculated by the following formula, and when the automobile runs forwards and is braked and recovered, the instantaneous power of the braking energy recovery system is equal to the limit value multiplied by 100 percent of the actual torque of a motor/the reverse torque of the motor; when the vehicle runs backwards and the brake is recovered, the instantaneous power of the brake energy recovery system is equal to the actual torque of the motor/the limited value of the forward torque of the motor multiplied by 100%.
In order to prevent the motor from being damaged, the actual torque is always smaller than the motor torque limit value, namely the ratio of the actual torque of the motor to the motor torque limit value is between 0 and 100 percent, the motor torque limit value is a fixed value, and the larger the actual torque of the motor is, the larger the instantaneous power of the braking energy recovery system is. The output in percentages may be presented to the user for visual display. The method for real-time output display in the percentage mode comprises the step of directly displaying on an automobile instrument panel through a number of 0-100% or displaying on the automobile instrument panel through a progress bar mode.
In addition, the display of the available residual power of the electric automobile can give the acceleration potential of the current driving state to the consumer, and is an important part of the power display of the electric automobile. The embodiment of the invention provides a method for displaying power of an electric automobile, which comprises the steps of obtaining instantaneous power A of a driving system, maximum forward power B1 of the driving system, maximum reverse power B2 of the driving system and a discharge power limit value C allowed by a battery, and calculating the percentage of available residual power of the driving system according to the following formula, wherein P is the percentage of the instantaneous power of the driving system: when the vehicle runs forwards, the vehicle is driven forwards, and P is A/Min (B1, C) multiplied by 100%; when the vehicle runs backwards, the vehicle is driven in reverse, and P is A/Min (B2, C) multiplied by 100%; the available residual power of the driving system is 1-P; the driving system can output and display the residual power in percentage form in real time.
The available surplus power is related to the instantaneous power of the drive system. However, the instantaneous power of the single-display driving system cannot represent the acceleration potential in the current driving state. Thus, in some cases, the 1-drive system instantaneous power/drive system maximum power, may represent the available remaining power. However, the battery is not enough to drive the driving system to reach the maximum power of the driving system under some conditions, and the allowable discharging power of the battery is taken into consideration, so that the calculation of the available residual power is more consistent with the practical situation.
In order to prevent damage to the driving system and the battery, the instantaneous power of the driving system is less than the maximum power of the driving system, the instantaneous power of the driving system is less than the limit value of the discharge power, A/Min (B1, C) and A/Min (B2, C) are both between 0 and 100 percent, and the larger the instantaneous power of the driving system is, the smaller the available residual power is. The output in percentages may be presented to the user for visual display. The method for real-time output display in the percentage mode comprises the step of directly displaying on an automobile instrument panel through a number of 0-100% or displaying on the automobile instrument panel through a progress bar mode.
In some cases, the forward limit value and the reverse limit value of the motor are different, and the method takes the condition that the forward direction and the reverse direction of the motor are different into consideration for limiting, so that the motor is protected.
For the battery, the discharging power of the battery is mainly affected by the battery temperature and the remaining capacity, so in an embodiment, the discharging power limit value C is a discharging power limit value that is allowed by the battery and is obtained in real time according to the battery temperature and the remaining capacity. The battery temperature and the remaining capacity are the most easily obtained data, and are effective and feasible methods for further obtaining the discharge power limit value.
For the maximum power of the driving system, the power can be calculated by the torque multiplied by the rotating speed, so in one embodiment, the maximum forward power B1 of the driving system is calculated in real time according to the forward torque limit value and the rotating speed of the driving motor; and calculating the maximum reverse power B2 of the driving system in real time according to the reverse torque limit value and the rotating speed of the driving motor. And calculating the mechanical power of the driving motor according to the actual torque and the actual rotating speed of the driving motor in real time, and calculating the instantaneous power A of the driving system.
For example, the drive system instantaneous power a is equal to the drive motor actual torque × the rotational speed, or the drive system instantaneous power a is equal to the drive motor actual torque × the rotational speed × the efficiency.
The torque limit value of the motor is a basic parameter of the motor, and the rotating speed and the actual torque are easy to obtain in real time, so that the torque limit value is an effective and feasible basis for further obtaining the maximum power of the driving system.
In an alternative embodiment, fig. 1 includes the following steps:
s1000, judging that the vehicle runs forwards/backwards, and if the vehicle runs forwards, executing S1001; if yes, jumping to execute S1011;
s1001, calculating mechanical power of a driving motor as instantaneous power A of the driving system in real time according to actual torque and rotating speed of the driving motor;
s1002, calculating the maximum forward power B1 of the driving system in real time according to the forward torque limit value and the rotating speed of the driving motor;
s1003, acquiring a discharge power limit value C allowed by the battery in real time according to the battery temperature and the residual capacity;
s1004 driving the system instantaneous power percentage P ═ a/Min (B1, C) × 100%;
s1005, driving the system to use the available residual power as 1-P;
when the braking is recovered in S1006, the instantaneous power display value of the braking energy recovery system is equal to the actual torque of the motor/the limited value of the reverse torque of the motor × 100%, and the process returns to S1000 again.
S1011, calculating the mechanical power of the driving motor as the instantaneous power A of the driving system in real time according to the actual torque and the actual rotating speed of the driving motor;
s1012, calculating the maximum reverse power B2 of the driving system in real time according to the reverse torque limit value and the rotating speed of the driving motor;
s1013, acquiring a discharging power limit value C allowed by the battery according to the battery temperature and the residual capacity in real time;
s1014 driving the system instantaneous power percentage P ═ a/Min (B2, C) × 100%;
the S1015 drive system available remaining power is 1-P;
when the braking is recovered in S1016, the braking energy recovery system returns to S1000 again, where the instantaneous power display value of the braking energy recovery system is equal to the actual motor torque/the motor forward torque limit value × 100%.
According to the method for displaying the instantaneous power of the braking energy recovery system, an embodiment of the invention provides a vehicle-mounted electronic device 200 as shown in fig. 2, including: the display module 201 is used for outputting and displaying the instantaneous power of the braking energy recovery system in percentage form in real time; the judging module 202 is used for judging whether the vehicle runs forwards or backwards and judging whether the vehicle is in a braking state; a calculating module 203, configured to calculate instantaneous power of a braking energy recovery system when the determining module 202 determines that the vehicle is traveling forward and braking, where the instantaneous power of the braking energy recovery system is equal to a limit value × 100% of an actual torque of the motor/a reverse torque of the motor; the method is used for calculating the instantaneous power of the braking energy recovery system, wherein the instantaneous power of the braking energy recovery system is equal to the actual torque of the motor/the limited value of the forward torque of the motor multiplied by 100%, when the judging module 202 judges that the vehicle runs backwards and is braking. The embodiments of the present invention are consistent with the technical solutions of the methods of the present invention, and the beneficial effects obtained by various aspects and corresponding feasible implementation manners are similar, and are not described in detail again.
According to the display method of the available remaining power, an embodiment of the present invention provides an in-vehicle electronic device 200 as shown in fig. 2, including: the display module 201 is used for outputting and displaying the available residual power of the driving system in percentage form in real time; a judging module 202, configured to judge whether the vehicle is driving forward or backward; a calculating module 203, configured to obtain the instantaneous power a of the driving system, the maximum forward power B1 of the driving system, the maximum reverse power B2 of the driving system, and the limit value C of the discharge power allowed by the battery, and calculate the percentage of remaining power available for the driving system according to the following formula, where P is the instantaneous power percentage of the driving system: when the determination module 202 determines that the vehicle is traveling forward, P is a/Min (B1, C) × 100%; when the determination module 202 determines that the vehicle is traveling backward, P is a/Min (B2, C) × 100%; the remaining power available to the drive system is 1-P. The embodiments of the present invention are consistent with the technical solutions of the methods of the present invention, and the beneficial effects obtained by various aspects and corresponding feasible implementation manners are similar, and are not described in detail again.
Embodiments of the present invention provide a non-transitory computer readable storage medium storing computer instructions for causing the computer to perform any one of the methods according to the first and second aspects. The embodiments of the present invention are consistent with the technical solutions of the methods of the present invention, and the beneficial effects obtained by various aspects and corresponding feasible implementation manners are similar, and are not described in detail again.
An embodiment of the present invention provides an electronic device 300 as shown in fig. 3, including: at least one processor 301, at least one memory 302 communicatively coupled to the processor, wherein: the memory 302 stores program instructions executable by the processor, and the processor 301 calls the program instructions to perform any of the methods according to the first and second aspects. The embodiments of the present invention are consistent with the technical solutions of the methods of the present invention, and the beneficial effects obtained by various aspects and corresponding feasible implementation manners are similar, and are not described in detail again.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. In the several embodiments provided in this specification, the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the division of the units is only one logical functional division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
Each functional unit in the embodiments of the present description may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions to enable a computer device (which may be a personal computer, a server, or a network device) or a processor (processor) to execute some steps of the methods described in the embodiments of the present disclosure. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a Read Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The present invention has not been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus, systems, and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
As mentioned above, the above embodiments are only used to illustrate the technical solutions of the embodiments of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A method for displaying power of an electric vehicle, comprising: the instantaneous power of the braking energy recovery system is output and displayed in percentage form in real time, the instantaneous power of the braking energy recovery system is calculated by the following formula,
when the vehicle runs forwards and the braking energy is recovered, the instantaneous power of the braking energy recovery system is obtained by the following formula: the instantaneous power of the braking energy recovery system is equal to the limit value multiplied by 100 of the actual torque of the motor/the reverse torque of the motor;
when the vehicle runs backwards and the braking is recovered, the instantaneous power of the braking energy recovery system is equal to the actual torque of the motor/the limited value of the forward torque of the motor multiplied by 100%.
2. A method for displaying power of an electric vehicle, comprising:
when the vehicle runs forwards, the vehicle is driven forwards, and the instantaneous power percentage P of the driving system is obtained through the following formula: p ═ a/Min (B1, C) × 100%;
when the vehicle runs backwards, the vehicle is driven reversely, and the instantaneous power percentage P of the driving system is obtained through the following formula: p ═ a/Min (B2, C) × 100%;
wherein A is instantaneous power of a driving system, B1 is maximum forward power of the driving system, C is a discharge power limit value allowed by a battery, and B2 is maximum reverse power of the driving system;
the available residual power of the driving system is 1-P;
the driving system can output and display the residual power in percentage form in real time.
3. The calculation and display method according to claim 1 or 2, wherein the method for outputting and displaying in percentage form in real time comprises displaying in 0-100% of number directly on the automobile dashboard or displaying in progress bar form on the automobile dashboard.
4. The calculation and display method according to claim 2, wherein the discharge power limit value C is a discharge power limit value that is allowed to be obtained from the battery temperature and the remaining capacity in real time.
5. The calculation and display method according to claim 2, comprising calculating the maximum forward power B1 of the drive system in real time according to the forward torque limit value and the rotating speed of the drive motor; and calculating the maximum reverse power B2 of the driving system in real time according to the reverse torque limit value and the rotating speed of the driving motor.
6. The calculation and display method according to claim 2, comprising calculating drive motor mechanical power from actual torque and rotational speed of the drive motor in real time, calculating the drive system instantaneous power a.
7. An in-vehicle electronic apparatus, characterized by comprising:
the display module is used for outputting and displaying the instantaneous power of the braking energy recovery system in percentage form in real time;
the judging module is used for judging whether the vehicle runs forwards or backwards and judging whether the vehicle is in a braking state;
the calculating module is used for calculating the instantaneous power of the braking energy recovery system when the judging module judges that the vehicle runs forwards and is braked, and the instantaneous power of the braking energy recovery system is obtained through the following formula: the instantaneous power of the braking energy recovery system is equal to the limit value multiplied by 100 of the actual torque of the motor/the reverse torque of the motor; and the judgment module is also used for calculating the instantaneous power of the braking energy recovery system when the vehicle is judged to be driven backwards and braked, wherein the instantaneous power of the braking energy recovery system is equal to the actual torque of the motor/the forward torque limit value of the motor multiplied by 100%.
8. An in-vehicle electronic apparatus, characterized by comprising:
when the vehicle runs forwards, the vehicle is driven forwards, and the instantaneous power percentage P of the driving system is obtained through the following formula: p ═ a/Min (B1, C) × 100%;
when the vehicle runs backwards, the vehicle is driven reversely, and the instantaneous power percentage P of the driving system is obtained through the following formula: p ═ a/Min (B2, C) × 100%;
wherein A is instantaneous power of a driving system, B1 is maximum forward power of the driving system, C is a discharge power limit value allowed by a battery, and B2 is maximum reverse power of the driving system;
the available residual power of the driving system is 1-P;
the driving system can output and display the residual power in percentage form in real time.
9. A non-transitory computer-readable storage medium storing computer instructions that cause a computer to perform the method of any one of claims 1 to 6.
10. An electronic device, comprising: at least one processor, at least one memory communicatively coupled to the processor, wherein:
the memory stores program instructions executable by the processor, the processor invoking the program instructions to perform the method of any of claims 1 to 6.
Priority Applications (1)
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