CN114683960A - Power battery SOC display control method and device, storage medium and management system - Google Patents
Power battery SOC display control method and device, storage medium and management system 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
- 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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- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
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Abstract
The invention discloses a power battery SOC display control method and device, a storage medium and a management system, wherein the power battery SOC display control method comprises the following steps: acquiring an initial real SOC value of the power battery, and calculating the real SOC value of the power battery according to the initial real SOC value and a predetermined real SOC operation model; acquiring an initial display SOC value of the power battery, and determining the relation between the initial display SOC value and an initial real SOC value; determining a following coefficient according to the relation, determining a display SOC operation model according to the following coefficient and the real SOC operation model, and calculating a display SOC value of the power battery according to the initial display SOC value and the display SOC operation model so as to display the SOC value following the real SOC value; and controlling the electric vehicle to display the SOC of the power battery according to the display SOC value. Therefore, the SOC display control method of the power battery of the electric vehicle can effectively prevent the SOC from jumping, ensure the normal work of the power battery and improve the user experience.
Description
Technical Field
The present invention relates to electric vehicle technology, and in particular, to a method for controlling SOC display of a power battery of an electric vehicle, a computer-readable storage medium, a battery management system, and a device for controlling SOC display of a power battery of an electric vehicle.
Background
Estimating the SOC (State of Charge) of a lithium Battery is one of the core algorithms of a BMS (Battery Management System). In the current mainstream BMS algorithm, an ampere-hour integration method and OCV (on Chip variables) correction are mainly used to calculate the SOC of the lithium battery, and when the OCV setting condition is satisfied, the SOC value is directly modified through table lookup calculation. Therefore, the SOC is easy to jump, so that the SOC cannot work normally, the work of the power battery is seriously influenced, and the use experience of a user is reduced.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, an object of the present invention is to provide a method for controlling SOC display of a power battery of an electric vehicle, which can effectively prevent SOC from jumping, ensure normal operation of the power battery, and improve user experience.
A second object of the invention is to propose a computer-readable storage medium.
A third object of the present invention is to provide a battery management system.
A fourth object of the present invention is to provide a power battery SOC display control apparatus for an electric vehicle.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides a power battery SOC display control method for an electric vehicle, including: acquiring an initial real SOC value of a power battery, and calculating the real SOC value of the power battery according to the initial real SOC value and a predetermined real SOC operation model; acquiring an initial display SOC value of the power battery, and determining a relation between the initial display SOC value and the initial real SOC value; determining a following coefficient according to the charging and discharging working conditions of the power battery and the relation between the initial display SOC value and the initial real SOC value, determining a display SOC operation model according to the following coefficient and the real SOC operation model, and calculating the display SOC value of the power battery according to the initial display SOC value and the display SOC operation model so that the display SOC value follows the real SOC value; and controlling the electric vehicle to display the SOC of the power battery according to the display SOC value.
The SOC display control method of the power battery of the embodiment of the invention comprises the steps of firstly obtaining an initial real SOC value of the power battery, and calculating the real SOC value of the power battery according to the initial real SOC value and a predetermined real SOC running model; then obtaining an initial display SOC value of the power battery, and determining the relation between the initial display SOC value and an initial real SOC value; then determining a following coefficient according to the charging and discharging working condition of the power battery and the relation between the initial display SOC value and the initial real SOC value, determining a display SOC operation model according to the following coefficient and the real SOC operation model, and calculating the display SOC value of the power battery according to the initial display SOC value and the display SOC operation model so as to display the SOC value following the real SOC value; and finally, controlling the electric vehicle to display the SOC of the power battery according to the display SOC value. Therefore, the SOC display control method of the power battery of the electric vehicle can effectively prevent the SOC from jumping, ensure the normal work of the power battery and improve the user experience.
In some examples of the invention, determining the following coefficient according to the charging and discharging conditions of the power battery and the relationship between the initial display SOC value and the initial real SOC value comprises: and when the charging and discharging working condition of the power battery is a discharging working condition, if the initial display SOC value is larger than the initial real SOC value, the display SOC value and the real SOC value are equal to each other at half of the real SOC value and serve as targets to determine the following coefficient.
In some examples of the present invention, determining a following coefficient according to the charging and discharging conditions of the power battery and the relationship between the initial display SOC value and the initial real SOC value further includes: and when the charging and discharging working condition of the power battery is a discharging working condition, if the initial display SOC value is smaller than the initial real SOC value, the display SOC value and the real SOC value are equal to each other at half of the display SOC value and serve as targets to determine the following coefficient.
In some examples of the invention, determining the following coefficient according to the charging and discharging conditions of the power battery and the relationship between the initial display SOC value and the initial real SOC value comprises: when the charging and discharging working condition of the power battery is a charging working condition, if the initial Display SOC value is larger than the initial real SOC value, the following coefficient is determined by taking the Display SOC value and the real SOC value equal to each other when the Display SOC value is a first SOC calculated value as a target, wherein the first SOC calculated value is equal to (100+ Display-SOC)/2, and the Display-SOC is the Display SOC value.
In some examples of the present invention, determining a following coefficient according to the charging and discharging conditions of the power battery and the relationship between the initial display SOC value and the initial real SOC value further includes: and when the charging and discharging working condition of the power battery is a charging working condition, if the initial display SOC value is smaller than the initial Real SOC value, determining the following coefficient by taking the display SOC value and the Real SOC value equal to each other when the display SOC value and the Real SOC value are in a second SOC calculated value as a target, wherein the second SOC calculated value is equal to (100+ Real-SOC)/2, and Real-SOC is the Real SOC value.
In some examples of the invention, the real SOC operational model is expressed according to the following formula:
wherein, SOC [ real]0And C is the initial real SOC value, C is the rated capacity of the power battery, SOH is the capacity attenuation coefficient of the power battery, alpha is the capacity temperature compensation coefficient of the power battery, and eta is the charge-discharge efficiency of the power battery.
In some examples of the invention, the display SOC operational model is expressed according to the following formula:
wherein, SOC [ display ]]0And displaying the initial SOC value, C the rated capacity of the power battery, SOH the capacity attenuation coefficient of the power battery, alpha the capacity temperature compensation coefficient of the power battery, eta the charge-discharge efficiency of the power battery, and lambda the following coefficient.
To achieve the above object, a second aspect embodiment of the present invention proposes a computer-readable storage medium having stored thereon a power battery SOC display control program of an electric vehicle, which when executed by a processor, implements the power battery SOC display control method of the electric vehicle as described in the above embodiment.
According to the computer-readable storage medium of the embodiment of the invention, the processor executes the SOC display control program of the power battery of the electric vehicle stored on the storage medium, so that the jump of the SOC can be effectively prevented, the normal work of the power battery is ensured, and the user experience is improved.
In order to achieve the above object, a third aspect of the present invention provides a battery management system, which includes a memory, a processor and a power battery SOC display control program of an electric vehicle stored in the memory and operable on the processor, wherein the processor implements the power battery SOC display control method of the electric vehicle as described in the above embodiment when executing the power battery SOC display control program of the electric vehicle.
The battery management system comprises the memory and the processor, wherein the processor executes the power battery SOC display control program of the electric vehicle stored on the memory, so that the jump of the SOC can be effectively prevented, the normal work of the power battery is ensured, and the user experience is improved.
In order to achieve the above object, a fourth aspect of the present invention provides a power battery SOC display control apparatus for an electric vehicle, including a first obtaining module configured to obtain an initial true SOC value of a power battery; the first calculation module is used for calculating the real SOC value of the power battery according to the initial real SOC value and a predetermined real SOC operation model; the second acquisition module is used for acquiring an initial display SOC value of the power battery; a determining module for determining a relationship between the initial display SOC value and the initial true SOC value; the second calculation module is used for determining a following coefficient according to the charging and discharging working conditions of the power battery and the relation between the initial display SOC value and the initial real SOC value, determining a display SOC operation model according to the following coefficient and the real SOC operation model, and calculating the display SOC value of the power battery according to the initial display SOC value and the display SOC operation model so that the display SOC value follows the real SOC value; and the display control module is used for controlling the electric vehicle to display the SOC of the power battery according to the display SOC value.
The SOC display control device of the power battery of the electric vehicle comprises a first acquisition module, a first calculation module, a second acquisition module, a determination module, a second calculation module and a display control module. The first acquisition module is used for acquiring an initial real SOC value of the power battery, the first calculation module is used for calculating the real SOC value of the power battery according to the initial real SOC value and a predetermined real SOC operation model, and then the second acquisition module is used for acquiring an initial display SOC value of the power battery. The determining module determines a relation between an initial display SOC value and an initial real SOC value, the second calculating module determines a following coefficient according to the charging and discharging working condition of the power battery and the relation between the initial display SOC value and the initial real SOC value, determines a display SOC operation model according to the following coefficient and the real SOC operation model, and then calculates the display SOC value of the power battery according to the initial display SOC value and the display SOC operation model so as to display the fact that the SOC value follows the real SOC value. And finally, controlling the electric vehicle to display the SOC of the power battery through the display control module according to the display SOC value. Therefore, the power battery SOC display control device of the electric vehicle can effectively prevent the SOC from jumping, ensure the normal work of the power battery and improve the user experience.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a flowchart of a power battery SOC display control method of an electric vehicle according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a power battery SOC display control method of an electric vehicle determining a follow factor according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating a method for controlling the SOC display of a power battery of an electric vehicle according to another embodiment of the present invention to determine a follow factor;
FIG. 4 is a diagram illustrating a method for controlling the SOC display of a power battery of an electric vehicle according to another embodiment of the present invention to determine a follow factor;
FIG. 5 is a diagram illustrating a method for controlling the SOC display of a power battery of an electric vehicle according to another embodiment of the present invention to determine a follow factor;
fig. 6 is a block diagram of the structure of a battery management system of an embodiment of the present invention;
fig. 7 is a block diagram showing the configuration of a power battery SOC display control device of an electric vehicle according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The following describes a power battery SOC display control method and apparatus, a storage medium, and a management system of an electric vehicle according to an embodiment of the present invention with reference to the drawings.
Fig. 1 is a flowchart of a power battery SOC display control method for an electric vehicle according to an embodiment of the present invention.
As shown in fig. 1, the power battery SOC display control method of an electric vehicle includes the steps of:
firstly, it should be noted that the present invention implements a strategy of using dual SOCs to control the power battery, wherein the strategy includes a real SOC value and a display SOC value. In this embodiment, the Real SOC value is set as Real-SOC, and the Display SOC value is set as Display-SOC. The real SOC value is the most real SOC value of the power battery estimated by the BMS based on an ampere-hour integration method and adding charge-discharge rate compensation, temperature compensation, OCV correction and charge-discharge dynamic correction; and the displayed SOC value is the SOC value displayed to the user. In the embodiment, the display SOC value is controlled to be dually approximated to the real SOC value according to the following strategy according to the difference value between the display SOC value and the real SOC value and the charging and discharging working conditions until the display SOC value and the real SOC value are equal to each other.
And S10, acquiring an initial real SOC value of the power battery, and calculating the real SOC value of the power battery according to the initial real SOC value and a predetermined real SOC operation model.
Specifically, in this embodiment, the initial true SOC value SOC real of the power battery is obtained first]0Then according to the initial real SOC value SOC [ real ]]0And calculating the real SOC value of the power battery by using the predetermined real SOC operation model. In some examples of the invention, the real SOC operational model is expressed according to the following formula:
wherein, SOC [ real]0The initial real SOC value is obtained, C is the rated capacity of the power battery, SOH is the capacity attenuation coefficient of the power battery, alpha is the capacity temperature compensation coefficient of the power battery, and eta is the charge-discharge efficiency of the power battery.
And S20, acquiring the initial display SOC value of the power battery, and determining the relation between the initial display SOC value and the initial real SOC value.
Specifically, in this embodiment, the initial display SOC value SOC display of the power battery is also acquired]0Then, the initial display SOC value SOC [ display ] is determined]0And the initial real SOC value SOC [ real ]]0The relationship between them. Note that the SOC value SOC display is initially displayed]0And the initial real SOC value SOC [ real ]]0There is an initial display SOC value SOC [ display ]]0Greater than the initial true SOC value SOC real]0Or initially displaying SOC value SOC display]0Less than the initial true SOC value SOC real]0。
And S30, determining a following coefficient according to the charging and discharging working conditions of the power battery and the relation between the initial display SOC value and the initial real SOC value, determining a display SOC operation model according to the following coefficient and the real SOC operation model, and calculating the display SOC value of the power battery according to the initial display SOC value and the display SOC operation model so as to display the SOC value following the real SOC value.
And S40, controlling the electric vehicle to display the SOC of the power battery according to the display SOC value.
Specifically, the charging or discharging condition of the power battery directly affects the following coefficient of the dual SOC in the embodiment of the present invention, and the embodiment displays the SOC value SOC [ display ] according to the charging or discharging condition of the power battery and the initial display SOC value]0And an initial true SOC value SOC real]0The relationship between can determine the following coefficient. After the following coefficient is determined, a display SOC operational model can be determined according to the following coefficient and the real SOC operational model. And after the Display SOC operation model is determined, the Display SOC value Display-SOC can be determined through the Display SOC operation model, and then the electric vehicle is controlled to Display the SOC of the power battery according to the Display SOC value Display-SOC. In some examples of the invention, the SOC operational model is shown to be expressed according to the following formula:
wherein, SOC [ display ]]0The SOC value is initially displayed, C is rated capacity of the power battery, SOH is capacity attenuation coefficient of the power battery, alpha is capacity temperature compensation coefficient of the power battery, eta is charge-discharge efficiency of the power battery, and lambda is following coefficient. After obtaining the display SOC operation model, according to the initial display SOC value SOC [ display ]]0And the display SOC operation model can calculate the display SOC value of the power battery, so that the display SOC value can follow the real SOC value.
In some examples of the invention, determining the following coefficient according to the charging and discharging conditions of the power battery and the relationship between the initial display SOC value and the initial real SOC value comprises: when the charging and discharging working condition of the power battery is the discharging working condition, if the initial display SOC value is larger than the initial real SOC value, the display SOC value and the real SOC value are equal to each other at half of the real SOC value and serve as targets to determine the following coefficient. When the charging and discharging working condition of the power battery is the discharging working condition, if the initial display SOC value is smaller than the initial real SOC value, the display SOC value and the real SOC value are equal when half of the display SOC value is taken as targets to determine the following coefficient.
Specifically, when the current of the power battery is less than-3 amperes, the current power battery can be judged to be in a discharging state, and at the moment, the initial display SOC value SOC [ display ] is judged]0And the initial real SOC value SOC [ real ]]0The size of (c) between. As shown in FIG. 2, if the SOC value SOC [ display ] is initially displayed]0Greater than the initial true SOC value SOC real]0The following coefficient is determined with the Display SOC value Display-SOC and the true SOC value Real-SOC being equal at half the true value Real-SOC as targets, that is, in each calculation cycle, it is always desirable that the Display SOC value Display-SOC and the true SOC value Real-SOC be equal at SOC (Real-SOC)/2. As shown in FIG. 3, if the SOC value SOC [ display ] is initially displayed]0Less than the initial true SOC value SOC real]0The following coefficient is determined with the Display SOC value Display-SOC and the true SOC value Real-SOC being equal at half the Display SOC value Display-SOC as targets, that is, in each calculation cycle, it is always desirable that the Display SOC value Display-SOC and the true SOC value Real-SOC are equal at SOC ═ Display-SOC)/2.
In some examples of the invention, determining the following coefficient according to the charging and discharging conditions of the power battery and the relationship between the initial display SOC value and the initial real SOC value comprises: when the charging and discharging working condition of the power battery is the charging working condition, if the initial Display SOC value is larger than the initial real SOC value, the following coefficient is determined by taking the Display SOC value and the real SOC value equal to each other when the first SOC calculated value is equal to (100+ Display-SOC)/2, and the Display-SOC is the Display SOC value. When the charging and discharging working condition of the power battery is the charging working condition, if the initial display SOC value is smaller than the initial Real SOC value, the display SOC value is equal to the Real SOC value when the Real SOC value is a second SOC calculated value, the second SOC calculated value is equal to (100+ Real-SOC)/2, and the Real-SOC value is the Real SOC value.
Specifically, when the current of the power battery is greater than 3 amperes, the current power battery can be judged to be in a charging state, and at the moment, the initial display SOC value SOC [ display ] is judged]0And the initial real SOC value SOC [ real ]]0The size of (c) between. As shown in fig. 4As shown, if the SOC value SOC [ display ] is initially displayed]0Greater than the initial true SOC value SOC real]0Then, the Display SOC value Display-SOC and the Real SOC value Real-SOC are equal to each other at the time of the first SOC calculation value, which is equal to (100+ Display-SOC)/2, and the Display-SOC is the Display SOC value, that is, in each calculation cycle, it is always desirable that the Display SOC value Display-SOC and the Real SOC value Real-SOC are equal to each other at the time of SOC ═ of (100+ Display-SOC)/2. As shown in FIG. 5, if the SOC value SOC [ display ] is initially displayed]0Less than the initial true SOC value SOC real]0Then, the Display SOC value Display-SOC and the Real SOC value Real-SOC are equal at the second calculated SOC value as the target following coefficient, where the second calculated SOC value is equal to (100+ Real-SOC)/2, and Real-SOC is the Real SOC value, that is, in each calculation cycle, it is always desirable that the Display SOC value Display-SOC and the Real SOC value Real-SOC are equal at SOC of (100+ Real-SOC)/2.
In conclusion, the method for controlling the SOC display of the power battery of the electric vehicle can effectively prevent the SOC from jumping, ensure the normal work of the power battery and improve the user experience.
Further, the present invention proposes a computer-readable storage medium having stored thereon a power battery SOC display control program of an electric vehicle which, when executed by a processor, implements the power battery SOC display control method of the electric vehicle as in the above-described embodiments.
The computer-readable storage medium of the embodiment of the invention executes the SOC display control program of the power battery of the electric vehicle stored on the storage medium through the processor, thereby effectively preventing the SOC from jumping, ensuring the normal work of the power battery and improving the user experience.
Fig. 6 is a block diagram of the structure of a battery management system according to an embodiment of the present invention.
Further, as shown in fig. 6, the present invention proposes a battery management system 100, the battery management system 100 includes a memory 101, a processor 102 and a power battery SOC display control program of the electric vehicle stored on the memory 101 and operable on the processor 102, and when the processor 102 executes the power battery SOC display control program of the electric vehicle, the power battery SOC display control method of the electric vehicle as in the above embodiment is implemented.
The battery management system comprises the memory and the processor, wherein the processor executes the power battery SOC display control program of the electric vehicle stored on the memory, so that the jump of the SOC can be effectively prevented, the normal work of the power battery is ensured, and the user experience is improved.
Fig. 7 is a block diagram showing the configuration of a power battery SOC display control device of an electric vehicle according to an embodiment of the present invention.
Further, as shown in fig. 7, the present invention proposes a power battery SOC display control device 200 of an electric vehicle, the control device 200 including a first obtaining module 201, a first calculating module 211, a second obtaining module 202, a determining module 203, a second calculating module 212 and a display control module 204.
The first obtaining module 201 is used for obtaining an initial real SOC value of the power battery;
the first calculation module 211 is configured to calculate a real SOC value of the power battery according to the initial real SOC value and a predetermined real SOC operation model;
the second obtaining module 202 is used for obtaining an initial display SOC value of the power battery;
the determining module 203 is configured to determine a relationship between the initial display SOC value and the initial real SOC value;
the second calculation module 212 is configured to determine a following coefficient according to the charging and discharging conditions of the power battery and the relationship between the initial display SOC value and the initial real SOC value, determine a display SOC operation model according to the following coefficient and the real SOC operation model, and calculate the display SOC value of the power battery according to the initial display SOC value and the display SOC operation model, so that the display SOC value follows the real SOC value;
the display control module 204 is configured to control the electric vehicle to display the SOC of the power battery according to the display SOC value.
Firstly, it should be noted that the present invention implements a strategy of using dual SOCs to control the power battery, wherein the strategy includes a real SOC value and a display SOC value. In this embodiment, the Real SOC value is set to Real-SOC and the Display SOC value is set to Display-SOC. The real SOC value is the most real SOC value of the power battery estimated by the BMS based on an ampere-hour integration method and adding charge-discharge rate compensation, temperature compensation, OCV correction and charge-discharge dynamic correction; and the displayed SOC value is the SOC value displayed to the user. In the embodiment, the display SOC value is controlled to be dually approximated to the real SOC value according to the following strategy according to the difference value between the display SOC value and the real SOC value and the charging and discharging working conditions until the display SOC value and the real SOC value are equal to each other.
Specifically, in this embodiment, the initial real SOC value SOC real of the power battery is first obtained by the first obtaining module 201]0Then, the first calculation module 211 is utilized to calculate the initial real SOC value SOC [ real ]]0And calculating the real SOC value of the power battery by the predetermined real SOC operation model. In some examples of the invention, the real SOC operational model is expressed according to the following formula:
wherein, SOC [ real]0The initial real SOC value, the C rated capacity of the power battery, the SOH capacity attenuation coefficient of the power battery, the alpha capacity temperature compensation coefficient of the power battery and the eta charging and discharging efficiency of the power battery are obtained.
In this embodiment, the initial display SOC value SOC display of the power battery is also acquired by the second acquisition module 202]0Then, the initial display SOC value SOC [ display ] is determined by the determination module 203]0And initial true SOC value SOC [ real ]]0The relationship between them. Note that the SOC value SOC display is initially displayed]0And the initial real SOC value SOC [ real ]]0There is an initial display SOC value SOC [ display ]]0Greater than the initial true SOC value SOC real]0Or initially displaying SOC value SOC display]0Less than the initial true SOC value SOC real]0。
It should be noted that the charging or discharging condition of the power battery directly affects the following coefficient of the dual SOC in the embodiment of the present invention, and the second calculation module is utilized in the embodiment of the present invention212, displaying the SOC value according to the charging and discharging working conditions of the power battery and the initial display SOC value]0And an initial true SOC value SOC real]0The following coefficient can be calculated from the relationship between the following coefficients. After the following coefficient is obtained, the SOC operation model can be determined and displayed according to the following coefficient and the real SOC operation model. After the Display SOC operation model is determined, the Display SOC value Display-SOC can be determined through the Display SOC operation model, and then the Display control module 204 is used for controlling the electric vehicle to Display the SOC of the power battery according to the Display SOC value Display-SOC. In some examples of the invention, the SOC operational model is shown to be expressed according to the following formula:
wherein, SOC [ display ]]0The SOC value is initially displayed, C is rated capacity of the power battery, SOH is capacity attenuation coefficient of the power battery, alpha is capacity temperature compensation coefficient of the power battery, eta is charge-discharge efficiency of the power battery, and lambda is following coefficient. After obtaining the display SOC operation model, according to the initial display SOC value SOC [ display ]]0And the display SOC operation model can calculate the display SOC value of the power battery, so that the display SOC value can follow the real SOC value.
In some examples of the invention, determining the following coefficient according to the charging and discharging conditions of the power battery and the relationship between the initial display SOC value and the initial real SOC value comprises: when the charging and discharging working condition of the power battery is the discharging working condition, if the initial display SOC value is larger than the initial real SOC value, the display SOC value and the real SOC value are equal to each other at half of the real SOC value and serve as targets to determine the following coefficient. When the charging and discharging working condition of the power battery is the discharging working condition, if the initial display SOC value is smaller than the initial real SOC value, the display SOC value and the real SOC value are equal when half of the display SOC value is taken as targets to determine the following coefficient.
In some examples of the invention, determining the following coefficient according to the charging and discharging conditions of the power battery and the relationship between the initial display SOC value and the initial real SOC value comprises: when the charging and discharging working condition of the power battery is the charging working condition, if the initial Display SOC value is larger than the initial real SOC value, the following coefficient is determined by taking the Display SOC value and the real SOC value equal to each other when the first SOC calculated value is equal to (100+ Display-SOC)/2, and the Display-SOC is the Display SOC value. When the charging and discharging working condition of the power battery is the charging working condition, if the initial display SOC value is smaller than the initial Real SOC value, the display SOC value is equal to the Real SOC value when the Real SOC value is a second SOC calculated value, the second SOC calculated value is equal to (100+ Real-SOC)/2, and the Real-SOC value is the Real SOC value.
It should be noted that, in other specific embodiments of the power battery SOC display control apparatus for an electric vehicle according to the embodiments of the present invention, reference may be made to the specific embodiment of the power battery SOC display control method for an electric vehicle in the foregoing embodiments, and details are not repeated herein.
In conclusion, the power battery SOC display control device of the electric vehicle can effectively prevent the SOC from jumping, ensure the normal work of the power battery and improve the user experience.
It should be noted that the logic and/or steps represented in the flowcharts or otherwise described herein, such as an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A method for controlling SOC display of a power battery of an electric vehicle, comprising:
acquiring an initial real SOC value of a power battery, and calculating the real SOC value of the power battery according to the initial real SOC value and a predetermined real SOC operation model;
acquiring an initial display SOC value of the power battery, and determining a relation between the initial display SOC value and the initial real SOC value;
determining a following coefficient according to the charging and discharging working conditions of the power battery and the relation between the initial display SOC value and the initial real SOC value, determining a display SOC operation model according to the following coefficient and the real SOC operation model, and calculating the display SOC value of the power battery according to the initial display SOC value and the display SOC operation model so that the display SOC value follows the real SOC value;
and controlling the electric vehicle to display the SOC of the power battery according to the display SOC value.
2. The SOC display control method for the power battery as claimed in claim 1, wherein determining a following coefficient according to the charging and discharging working conditions of the power battery and the relationship between the initial display SOC value and the initial real SOC value comprises:
and when the charging and discharging working condition of the power battery is a discharging working condition, if the initial display SOC value is larger than the initial real SOC value, the display SOC value and the real SOC value are equal to each other at half of the real SOC value and serve as targets to determine the following coefficient.
3. The power battery SOC display control method of claim 2, wherein a following coefficient is determined according to the charging and discharging conditions of the power battery and the relationship between the initial display SOC value and the initial true SOC value, further comprising:
and when the charging and discharging working condition of the power battery is a discharging working condition, if the initial display SOC value is smaller than the initial real SOC value, the display SOC value and the real SOC value are equal to each other at half of the display SOC value and serve as targets to determine the following coefficient.
4. The power battery SOC display control method of claim 1, wherein determining a following coefficient according to the charging and discharging conditions of the power battery and the relationship between the initial display SOC value and the initial true SOC value comprises:
when the charging and discharging working condition of the power battery is a charging working condition, if the initial Display SOC value is larger than the initial real SOC value, the following coefficient is determined by taking the Display SOC value and the real SOC value equal to each other when the Display SOC value is a first SOC calculated value as a target, wherein the first SOC calculated value is equal to (100+ Display-SOC)/2, and the Display-SOC is the Display SOC value.
5. The power battery SOC display control method of claim 4, wherein a following coefficient is determined according to the charging and discharging conditions of the power battery and the relationship between the initial display SOC value and the initial true SOC value, further comprising:
and when the charging and discharging working condition of the power battery is a charging working condition, if the initial display SOC value is smaller than the initial Real SOC value, determining the following coefficient by taking the display SOC value and the Real SOC value equal to each other when the display SOC value and the Real SOC value are in a second SOC calculated value as a target, wherein the second SOC calculated value is equal to (100+ Real-SOC)/2, and Real-SOC is the Real SOC value.
6. The power battery SOC display control method of claim 1, wherein the true SOC operational model is expressed according to the following formula:
7. The power battery SOC display control method of claim 1, wherein the display SOC operational model is expressed according to the following formula:
8. A computer-readable storage medium, characterized in that a power battery SOC display control program of an electric vehicle is stored thereon, which when executed by a processor implements the power battery SOC display control method of the electric vehicle according to any one of claims 1 to 7.
9. A battery management system comprising a memory, a processor, and a power battery SOC display control program for an electric vehicle stored on the memory and operable on the processor, the processor implementing the power battery SOC display control method for an electric vehicle according to any one of claims 1 to 7 when executing the power battery SOC display control program for the electric vehicle.
10. A power battery SOC display control device of an electric vehicle is characterized by comprising:
the first acquisition module is used for acquiring an initial real SOC value of the power battery;
the first calculation module is used for calculating the real SOC value of the power battery according to the initial real SOC value and a predetermined real SOC operation model;
the second acquisition module is used for acquiring an initial display SOC value of the power battery;
a determining module for determining a relationship between the initial display SOC value and the initial true SOC value;
the second calculation module is used for determining a following coefficient according to the charging and discharging working conditions of the power battery and the relation between the initial display SOC value and the initial real SOC value, determining a display SOC operation model according to the following coefficient and the real SOC operation model, and calculating the display SOC value of the power battery according to the initial display SOC value and the display SOC operation model so that the display SOC value follows the real SOC value;
and the display control module is used for controlling the electric vehicle to display the SOC of the power battery according to the display SOC value.
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