CN112213652B - Method and system for estimating residual electric quantity - Google Patents
Method and system for estimating residual electric quantity Download PDFInfo
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- CN112213652B CN112213652B CN202010065557.9A CN202010065557A CN112213652B CN 112213652 B CN112213652 B CN 112213652B CN 202010065557 A CN202010065557 A CN 202010065557A CN 112213652 B CN112213652 B CN 112213652B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
- G01R31/387—Determining ampere-hour charge capacity or SoC
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/005—Testing of electric installations on transport means
- G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/3644—Constructional arrangements
- G01R31/3646—Constructional arrangements for indicating electrical conditions or variables, e.g. visual or audible indicators
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/3644—Constructional arrangements
- G01R31/3648—Constructional arrangements comprising digital calculation means, e.g. for performing an algorithm
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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
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Abstract
The invention provides a method and a system for estimating residual electric quantity, and belongs to the technical field of vehicles. The method comprises the following steps: acquiring a display SOC and a real SOC, converting the display SOC relative to a real SOC limit of the real SOC to obtain a converted display SOC, wherein the converted display SOC belongs to a real SOC window corresponding to the real SOC limit; and mapping a first change speed degree of the real SOC relative to the real SOC limit into a second change speed degree corresponding to the converted display SOC by using the relative sizes of the converted display SOC and the real SOC and the relative sizes of the real SOC limit and the real SOC. The invention is used for dynamically estimating the change of the display SOC.
Description
Technical Field
The present invention relates to the technical field of vehicles, and in particular, to a method for estimating a rate of change of a display residual capacity, a method for updating a display residual capacity, an electronic system for a vehicle, and a computer-readable storage medium.
Background
The new energy automobile has the advantages of low pollution, simple structure, low noise and the like, and is an important direction for the development of the automobile industry in the future. Currently, estimation of SOC (State of Charge) of most new energy vehicles combines an OCV (Open-circuit Voltage) lookup method and an ampere-hour integration method, and when the vehicle is placed for a long time, the residual electric quantity obtained by the OCV lookup method is different from that before sleep of the vehicle in the previous cycle; in addition, because the service life of the battery is considered, the residual electric quantity needs to be corrected before the charge is cut off or the lower limit of the discharge window is reached, so that the phenomenon of overcharge and overdischarge is avoided, and if the display value of the residual electric quantity seen by a user and the detected true value of the battery have large differences, the display value may jump when the charge is cut off or the discharge is stopped; therefore, when there is a difference between the true value and the display value, it is necessary to properly correct the display value, and finding a proper correction rate is an important loop for correcting the display value.
Disclosure of Invention
The invention aims to provide a method and a system for estimating the residual electric quantity, which aim to solve the technical problems that the display value cannot dynamically present the real situation of a battery and the battery is over-charged and over-discharged due to the fact that the display value of the residual electric quantity of the battery is not fitted with the real value change in the prior art.
The invention divides the residual electric quantity (SOC) into the display SOC and the real SOC, the display SOC can be directly seen on a vehicle display screen or a mobile phone APP (Application program), the display SOC can intuitively tell the user how much electric quantity can be used at present, and when the real SOC and the display SOC are different, the display SOC is properly corrected by searching for proper correction rate in consideration of the property that the display SOC can not jump.
In order to achieve the above object, an embodiment of the present invention provides a method for estimating a rate of change of a display remaining power, the method including:
s1) acquiring a display SOC and a real SOC, and converting the display SOC relative to a real SOC limit of the real SOC to obtain a converted display SOC, wherein the converted display SOC belongs to a real SOC window corresponding to the real SOC limit;
s2) mapping a first change speed degree of the real SOC relative to the real SOC limit into a second change speed degree corresponding to the converted display SOC (or the display SOC which is not converted in the step S1 and has a conversion relation with the converted display SOC) by using the relative sizes of the converted display SOC and the real SOC limit;
the relative size can be in specific forms of difference, absolute value of difference or root value of difference, and the like, and any one of the changing speed degree can be a speed which describes the changing speed of the display SOC or the real SOC relative to the respective SOC limit; in some specific cases, a change speed degree can also be a specific form such as a linear mapping value of a rate or root planting; in some embodiments, the displayed value of SOC may be substituted into the actual SOC and the actual value may be substituted into the displayed SOC such that the result of the conversion calculation is replaced from being within the actual SOC window to being within the displayed SOC window for a particular actual purpose, and the subsequent calculation may be replaced.
Specifically, in step S1), the display SOC is converted with respect to the true SOC limit of the true SOC, to obtain a converted display SOC, including:
acquiring a display SOC window, and determining a display SOC limit of the display SOC window;
determining a linear conversion relation between a display SOC factor and a real SOC factor through the real SOC limit and the display SOC limit;
and obtaining the converted display SOC by utilizing the display SOC and combining the linear conversion relation.
Specifically, step S2) further includes, before using the relative magnitudes of the converted display SOC and the real SOC and the relative magnitudes of the real SOC limit and the real SOC:
acquiring battery current, and judging the working state of the battery according to the magnitude relation between the battery current and a preset current threshold value;
and according to the battery working state, the mapping coefficient is set to zero and is ended, or according to the battery working state, a preset calculation rule is selected, wherein,
the preset calculation rule is configured to combine the converted display SOC, the real SOC and the real SOC limit, obtain a mapping coefficient,
the map coefficient is defined as a ratio of the display SOC change rate per unit time to the actual SOC change rate per unit time,
the map coefficient is configured as a coefficient corresponding to a map that adjusts how fast the converted display SOC changes from the true SOC limit (or the display SOC changes from a predefined display SOC limit).
Specifically, in step S2), the relative magnitudes of the converted display SOC and the real SOC and the relative magnitudes of the real SOC limit and the real SOC are used, specifically:
calculating a ratio by using the absolute value of the difference between the converted display SOC and the real SOC and the difference between the real SOC and the lower limit of the real SOC limit according to the preset calculation rule, and obtaining a current mapping coefficient by calculating the obtained ratio, wherein the preset calculation rule corresponds to the battery discharge state in the battery working state.
Specifically, in step S2), the relative magnitudes of the converted display SOC and the real SOC and the relative magnitudes of the real SOC limit and the real SOC are used, specifically:
calculating a ratio by using the absolute value of the difference between the converted display SOC and the real SOC and the difference between the upper limit of the real SOC and the real SOC according to the preset calculation rule, and obtaining a current mapping coefficient by calculating the obtained ratio, wherein the preset calculation rule corresponds to the battery charging state in the battery working state.
Specifically, in step S2), the current mapping coefficient is obtained by calculating the ratio, which includes:
determining that the display SOC is greater than the real SOC, obtaining a current mapping coefficient by adding a constant coefficient to a calculated ratio, or,
and determining that the display SOC is smaller than the real SOC, and obtaining the current mapping coefficient through the ratio obtained by subtracting the constant coefficient.
Specifically, before mapping the first variation speed of the real SOC with respect to the real SOC limit to the second variation speed corresponding to the display SOC in step S2), the method specifically includes:
and taking the product of the first change speed degree and the mapping coefficient as a second change speed degree corresponding to the display SOC.
Specifically, the method further comprises the steps of:
and converting the second change speed degree into a third change speed degree corresponding to the display SOC according to the conversion relation between the display SOC and the converted display SOC, wherein the third change speed degree is configured to generate a correction amount for updating the display SOC, and the sum of the correction amount and the display SOC belongs to a display SOC window corresponding to the display SOC limit of the display SOC.
Optionally, the method further comprises:
and calculating and generating a correction quantity for updating the display SOC according to the second change speed degree and the preset updating interval time.
Specifically, the method further comprises the steps of:
and converting the second change speed degree into a third change speed degree corresponding to the display SOC according to the conversion relation between the display SOC and the converted display SOC, wherein the third change speed degree is configured to replace the current change speed degree corresponding to the display SOC.
The embodiment of the invention provides a method for updating display residual capacity, which comprises the following steps:
estimating the current display SOC correction amount according to the second change speed or the third change speed and the preset updating interval time;
and acquiring a current display SOC, and updating the current display SOC by using the current display SOC and the current display SOC correction amount.
The embodiment of the invention provides a system for estimating and displaying the change speed of the residual electric quantity, which comprises the following steps:
the computing module is configured to acquire a display SOC and a real SOC, convert the display SOC relative to a real SOC limit of the real SOC, and acquire a converted display SOC, wherein the converted display SOC belongs to a real SOC window corresponding to the real SOC limit;
the computing module is configured to map a first degree of change in the real SOC relative to the real SOC limit to a second degree of change in the converted display SOC using a relative magnitude of the converted display SOC and the real SOC and a relative magnitude of the real SOC limit and the real SOC.
In yet another aspect, an embodiment of the present invention provides an electronic system for a vehicle, the electronic system including:
at least one processor;
a memory coupled to the at least one processor;
wherein the memory stores instructions executable by the at least one processor, the at least one processor implementing the aforementioned methods by executing the instructions stored by the memory.
In yet another aspect, embodiments of the present invention provide a computer-readable storage medium storing computer instructions that, when executed on a computer, cause the computer to perform the foregoing method.
According to the invention, the rate of the display SOC is optimized and corrected, so that the change of the display SOC is smooth and does not jump, and the display SOC can approach to the specific value of the real SOC, thereby avoiding overcharge and overdischarge, improving the product quality and improving the user experience;
the invention provides a conversion mode of a display SOC and a real SOC, which can place the converted display SOC in a real SOC window to perform rate-related calculation, instead of directly considering the real SOC window as the same as the display SOC window, and performing subsequent calculation without conversion;
the invention considers the actual change of the speed of the real SOC under different battery working states, correspondingly selects proper calculation rules, executes the optimization correction of the speed of the display SOC instead of defaulting to the change characteristic that the speed of the display SOC is consistent under all working states, and does not rely on the speed of the display SOC for comparison or calculation so as to complete the optimization correction.
Additional features and advantages of embodiments of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain, without limitation, the embodiments of the invention. In the drawings:
FIG. 1 is a schematic diagram of the main steps of an embodiment of the present invention;
FIG. 2 is a schematic diagram of an exemplary process flow according to an embodiment of the present invention.
Detailed Description
The following describes the detailed implementation of the embodiments of the present invention with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
Example 1
As shown in fig. 1, an embodiment of the present invention provides a method for estimating a rate of change of a display remaining power, the method including:
s1) acquiring a display SOC and a real SOC, and converting the display SOC relative to a real SOC limit of the real SOC to obtain a converted display SOC, wherein the converted display SOC belongs to a real SOC window corresponding to the real SOC limit;
s2) mapping a first change speed degree of the real SOC relative to the real SOC limit into a second change speed degree corresponding to the converted display SOC by using the relative sizes of the converted display SOC and the real SOC and the relative sizes of the real SOC limit and the real SOC;
specifically, in step S1), the display SOC is converted with respect to the true SOC limit of the true SOC, to obtain a converted display SOC, including:
acquiring a display SOC window, and determining a display SOC limit of the display SOC window;
determining a linear conversion relation between a display SOC factor and a real SOC factor through the real SOC limit and the display SOC limit;
and obtaining the converted display SOC by utilizing the display SOC and combining the linear conversion relation.
The window in the display SOC window or the real SOC window refers to a range composed of a charge window limit (upper limit) which is a limit of the SOC of the maximum allowable discharge and a discharge window limit (lower limit) which is a limit of the SOC of the maximum allowable charge, and in this embodiment, the display SOC window may be [0,100]The real SOC window may be [ W s1 ,W s2 ]；
According to the upper limit and the lower limit of the display SOC window and the upper limit and the lower limit of the real SOC window, the display SOC limit and the real SOC limit are linearly corresponding, and the following steps are combined:
wherein X and b are conversion coefficients, and the conversion coefficients are obtained by calculation:
therefore, before calculating the correction rate, the charge and discharge windows of the display SOC and the real SOC are consistent through conversion, so that subsequent calculation can be facilitated.
As in fig. 2, the flow in fig. 2 can be summarized as: firstly, linearly converting a display SOC window, then dynamically estimating a correction factor K (one of mapping coefficients) under different conditions, and finally mapping to obtain a correction rate of the display SOC, wherein the mapping can be defined as:
for the charge case, the rate of real SOC to the limit of the charge window correction factor k=the rate of display SOC to the limit of the charge window (second degree of change), or,
for discharge conditions, the rate of real SOC to discharge window limit correction factor K = rate of display SOC to the discharge window limit;
different conditions, combined with different battery working states, can be specifically divided into:
under the condition of charging, the true SOC > displays SOC, and K=K4;
b, under the condition of charging, the real SOC is < the display SOC, and K=K3;
c, under the discharge condition, displaying the SOC by the true SOC, wherein K=K2;
d, under the discharge condition, the true SOC is less than the display SOC, and K=K1;
e, in the non-working condition, K=0.
After window conversion is completed, battery current (such as Packcurr in FIG. 2) is obtained, and the working state of the battery is judged according to the magnitude relation between the battery current and a preset current threshold (which can be taken as 0);
specifically, if the absolute value of the battery current is less than or equal to 0, the battery operating state is not operated, the correction factor is set to zero, and the product of the real SOC and the correction factor K (e.g., the change rate of the realcos is also zero in fig. 2) is zero, the process is ended, or if the absolute value of the battery current is greater than 0, the battery operating state is in operation, whether the battery current is greater than 0 is further determined, thereby determining that the battery operating state is a charging state or a discharging state, selecting a corresponding preset calculation rule,
each preset calculation rule may correspond to one of the above conditions, for example for a charging situation,
according to the defined mapping, it is possible to combine:
wherein D is s To display the SOC after conversion, ΔDs is taken as the rate of change of the SOC in unit time, R s Is true SOC, ΔRs is true SOC change rate per unit time, W s2 For the charging window limit, t is the time when the real SOC or the converted display SOC changes to the real SOC window (this time the upper limit, i.e. the charging window limit), and after calculation, the correction factor K is obtained:
further, when the display SOC is larger than the true SOC, the correction factor K is K3:
further, when the display SOC is smaller than the true SOC, the correction factor K is K4:
also for example for the discharge case, according to a defined mapping, it is possible to combine:
wherein D is s To display the SOC after conversion, ΔDs is taken as the rate of change of the SOC in unit time, R s Is true SOC, ΔRs is true SOC change rate per unit time, W s1 For the discharge window limit, t is the time when the real SOC or the converted display SOC changes to the real SOC window (which is the lower limit at this time, i.e., the discharge window limit), and after calculation, the correction factor K is obtained:
further, when the display SOC is larger than the true SOC, the correction factor K is K1:
further, when the display SOC is smaller than the true SOC, the correction factor K is K2:
in the above, the preset calculation rule is that
And->
Constant coefficient 1 (although derived, in practice, different value configurations may be made), R s The rate of displaying the SOC can be obtained according to an ampere-hour integration method or an existing SOC estimation method.
In some implementations, the method further includes: and converting the second variation speed degree into a third variation speed degree (which can be taken as a correction rate and corresponds to a display SOC window) corresponding to the display SOC according to the conversion relation between the display SOC and the converted display SOC, wherein the third variation speed degree is configured to generate a correction amount for updating the display SOC, and the sum of the correction amount and the display SOC belongs to the display SOC window corresponding to the display SOC limit of the display SOC.
In some implementations, the method further includes: and converting the second change speed degree into a third change speed degree corresponding to the display SOC according to the conversion relation between the display SOC and the converted display SOC, wherein the third change speed degree is configured to replace the current change speed degree corresponding to the display SOC.
According to the embodiment of the invention, the charge-discharge SOC correction factors are dynamically estimated according to the current, the real SOC and the display SOC, so that the display SOC has reasonable change rate, correction can be fully completed before reaching the limit of the charge-discharge window, and overcharge and overdischarge are avoided.
Example 2
Based on embodiment 1, an embodiment of the present invention provides a method for updating a display remaining power, the method including:
estimating the current display SOC correction amount according to the second change speed or the third change speed and the preset updating interval time;
and acquiring a current display SOC, and updating the current display SOC by using the current display SOC and the current display SOC correction amount.
For the correction amount of the display SOC, there may be different specific implementations, for example, the current rate of displaying the SOC may be replaced by the third degree of change, and the correction amount may be calculated by combining with the preset update interval time.
Example 3
Based on embodiment 1, an embodiment of the present invention provides a system for estimating how fast a display remaining power changes, the system including:
the computing module is configured to acquire a display SOC and a real SOC, convert the display SOC relative to a real SOC limit of the real SOC, and acquire a converted display SOC, wherein the converted display SOC belongs to a real SOC window corresponding to the real SOC limit;
the computing module is configured to map a first degree of change in the real SOC relative to the real SOC limit to a second degree of change in the converted display SOC using a relative magnitude of the converted display SOC and the real SOC and a relative magnitude of the real SOC limit and the real SOC.
Example 4
Based on embodiments 1-3, an embodiment of the present invention provides a battery management system that updates a display SOC by the aforementioned second change speed level or third change speed level, where the battery management system uses the second change speed level to convert to the third change speed level, and then replaces the current change speed level of the display SOC with the third change speed level.
Example 5
Based on embodiments 1-3, an embodiment of the present invention provides a vehicle control system, where the vehicle control system may obtain the foregoing second change speed level or third change speed level, or may calculate and obtain the foregoing second change speed level or third change speed level, and encapsulate the foregoing second change speed level or third change speed level as interface data, where the interface data may be obtained by a terminal device (such as a mobile phone, a tablet computer, etc., and an application program matched with the vehicle control system is installed) or an in-vehicle display device (such as an in-vehicle center control screen, a driver dashboard, and/or a head-up display screen), and the terminal device or the in-vehicle display device may present a display SOC according to the interface data.
Example 6
Based on embodiments 1-3, an embodiment of the present invention provides a terminal device that is installed with an application program configured to acquire the aforementioned second change speed level or third change speed level, and also calculate a corrected display SOC using the second change speed level or the third change speed level, and update a display value of the display SOC on a user interface of the terminal device using the corrected display SOC, or,
the application program is configured to acquire the display SOC output by the aforementioned battery management system, and update the display value of the display SOC on the user interface of the terminal device with the display SOC output by the aforementioned battery management system.
The foregoing details of the optional implementation of the embodiment of the present invention have been described in detail with reference to the accompanying drawings, but the embodiment of the present invention is not limited to the specific details of the foregoing implementation, and various simple modifications may be made to the technical solution of the embodiment of the present invention within the scope of the technical concept of the embodiment of the present invention, and these simple modifications all fall within the protection scope of the embodiment of the present invention.
In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, various possible combinations of embodiments of the present invention are not described in detail.
Those skilled in the art will appreciate that all or part of the steps in implementing the methods of the embodiments described above may be implemented by a program stored in a storage medium, including instructions for causing a single-chip microcomputer, chip or processor (processor) to perform all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In addition, any combination of various embodiments of the present invention may be performed, so long as the concept of the embodiments of the present invention is not violated, and the disclosure of the embodiments of the present invention should also be considered.
Claims (8)
1. A method for estimating how fast a remaining power is to be displayed, the method comprising:
s1) acquiring a display SOC and a real SOC, and converting the display SOC relative to a real SOC limit of the real SOC to obtain a converted display SOC, wherein the converted display SOC belongs to a real SOC window corresponding to the real SOC limit;
s2) mapping a first change speed degree of the real SOC relative to the real SOC limit into a second change speed degree corresponding to the converted display SOC by using the relative sizes of the converted display SOC and the real SOC and the relative sizes of the real SOC limit and the real SOC;
in step S1), converting the display SOC with respect to the true SOC limit of the true SOC, to obtain a converted display SOC, including:
acquiring a display SOC window, and determining a display SOC limit of the display SOC window;
determining a linear conversion relation between a display SOC factor and a real SOC factor through the real SOC limit and the display SOC limit;
obtaining a converted display SOC by utilizing the display SOC and combining the linear conversion relation;
step S2) further includes, before using the relative magnitudes of the converted display SOC and the real SOC and the relative magnitudes of the real SOC limit and the real SOC:
acquiring battery current, and judging the working state of the battery according to the magnitude relation between the battery current and a preset current threshold value;
and according to the battery working state, the mapping coefficient is set to zero and is ended, or according to the battery working state, a preset calculation rule is selected, wherein,
the preset calculation rule is configured to combine the converted display SOC, the real SOC and the real SOC limit, obtain a mapping coefficient,
the map coefficient is defined as a ratio of the display SOC change rate per unit time to the actual SOC change rate per unit time,
the map coefficient is configured as a coefficient corresponding to a map that adjusts how fast the converted display SOC changes relative to the true SOC limit.
2. The method for estimating how fast the remaining power is changing according to claim 1, characterized in that the relative magnitudes of the converted display SOC and the real SOC limit and the real SOC are utilized in step S2), specifically:
calculating a ratio by using the absolute value of the difference between the converted display SOC and the real SOC and the difference between the real SOC and the lower limit of the real SOC limit according to the preset calculation rule, and obtaining a current mapping coefficient by calculating the obtained ratio, wherein the preset calculation rule corresponds to the battery discharge state in the battery working state.
3. The method for estimating how fast the remaining power is changing according to claim 1, characterized in that the relative magnitudes of the converted display SOC and the real SOC limit and the real SOC are utilized in step S2), specifically:
calculating a ratio by using the absolute value of the difference between the converted display SOC and the real SOC and the difference between the upper limit of the real SOC and the real SOC according to the preset calculation rule, and obtaining a current mapping coefficient by calculating the obtained ratio, wherein the preset calculation rule corresponds to the battery charging state in the battery working state.
4. A method for estimating and displaying a rate of change of a remaining power according to claim 2 or 3, wherein the obtaining of the current mapping coefficient by calculating the ratio in step S2) includes:
determining that the display SOC is greater than the real SOC, obtaining a current mapping coefficient by adding a constant coefficient to a calculated ratio, or,
and determining that the display SOC is smaller than the real SOC, and obtaining the current mapping coefficient through the ratio obtained by subtracting the constant coefficient.
5. The method for estimating a change speed of a display residual capacity according to claim 1, wherein before mapping the first change speed of the real SOC with respect to the real SOC limit to the second change speed corresponding to the display SOC in step S2), specifically:
and taking the product of the first change speed degree and the mapping coefficient as a second change speed degree corresponding to the display SOC.
6. The method for estimating and displaying how fast the remaining power changes according to claim 1, further comprising:
and converting the second change speed degree into a third change speed degree corresponding to the display SOC according to the conversion relation between the display SOC and the converted display SOC, wherein the third change speed degree is configured to generate a correction amount for updating the display SOC, and the sum of the correction amount and the display SOC belongs to a display SOC window corresponding to the display SOC limit of the display SOC.
7. A method for updating a display residual capacity, the method comprising:
estimating a current display SOC correction amount by the second degree of change according to any one of claims 1 to 6 or by the third degree of change according to claim 6 in combination with a preset update interval time;
and acquiring a current display SOC, and updating the current display SOC by using the current display SOC and the current display SOC correction amount.
8. An electronic system for a vehicle, the electronic system comprising:
at least one processor;
a memory coupled to the at least one processor;
wherein the memory stores instructions executable by the at least one processor, the at least one processor implementing the method of any one of claims 1 to 7 by executing the instructions stored by the memory.
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