CN114609530A - Method, device, equipment and medium for correcting battery state of charge - Google Patents
Method, device, equipment and medium for correcting battery state of charge Download PDFInfo
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- CN114609530A CN114609530A CN202011430004.5A CN202011430004A CN114609530A CN 114609530 A CN114609530 A CN 114609530A CN 202011430004 A CN202011430004 A CN 202011430004A CN 114609530 A CN114609530 A CN 114609530A
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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]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
- G01R31/3828—Arrangements for monitoring battery or accumulator variables, e.g. SoC using current integration
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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]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
- G01R31/3842—Arrangements for monitoring battery or accumulator variables, e.g. SoC combining voltage and current measurements
Abstract
The application discloses a method, a device, equipment and a medium for correcting the state of charge of a battery, wherein the method for correcting the state of charge of the battery comprises the following steps: acquiring an initial display value of the state of charge of the series battery pack at the current moment and a true value of the state of charge of the series battery pack at the current moment; calculating error electric quantity according to the actual value of the state of charge and the initial display value of the state of charge; determining the residual compensation time according to the actual value of the state of charge and the working mode of the series battery pack; and in the residual compensation time, correcting the initial charge state display value according to the working mode of the series battery pack and the error electric quantity to obtain a corrected charge state modification display value at the current moment. According to the method and the device, the initial charge state display value is uniformly corrected according to the working mode and the error electric quantity of the series battery pack within the residual compensation time, and the high-precision charge state correction display value is obtained.
Description
Technical Field
The present application relates to the field of battery technologies, and in particular, to a method, an apparatus, a device, and a medium for correcting a state of charge of a battery.
Background
The battery state of charge (SOC) is an important basis for the whole vehicle control system to make an optimal energy management strategy. The accurate estimation of the SOC value of the battery is particularly important for prolonging the service life of the battery.
Common calculation methods for calculating the charge state of the battery include ampere-hour integration, voltage correction, a neural network and the like; the SOC is calculated accurately by the neural network, but a large number of stable operation conditions are needed for analog calculation and correction, and the occupied resources are high; the voltage correction is influenced by factors such as temperature and current due to the electromotive force and the internal resistance of the battery, so that the use limitation conditions are more; the ampere-hour integration can accumulate errors continuously due to the current sampling precision.
In the related art, the ampere-hour integral is used as the SOC basic calculation for the series battery system, and then the voltage correction is performed. However, the above method has a problem of low accuracy of the state of charge of the battery.
Disclosure of Invention
Accordingly, the present invention provides a method, apparatus, device and medium for correcting the state of charge of a battery that at least partially addresses the above-mentioned problems.
The invention provides a method for correcting the state of charge of a battery, which comprises the following steps:
acquiring an initial display value of the state of charge of the series battery pack at the current moment and a true value of the state of charge of the series battery pack at the current moment;
calculating error electric quantity according to the actual value of the state of charge and the initial display value of the state of charge;
determining the residual compensation time according to the actual value of the state of charge and the working mode of the series battery pack;
and in the residual compensation time, uniformly correcting the initial charge state display value according to the working mode of the series battery pack and the error electric quantity to obtain a corrected charge state modification display value at the current moment.
As an achievable optimal mode, uniformly correcting the initial display value of the state of charge according to the working mode of the series battery pack and the error electric quantity, including:
determining a compensation ratio relation according to the battery power display interval time and the residual compensation time;
determining compensation electric quantity according to the relation between the error electric quantity and the compensation ratio;
and correcting the initial display value of the state of charge according to the working mode of the series battery pack and the compensation electric quantity.
As an achievable optimal mode, the correcting the initial display value of the state of charge according to the working mode of the series battery pack and the compensation electric quantity comprises:
when the working mode of the series battery pack is a charging mode and the error electric quantity is a positive number, the compensation electric quantity is added to the initial display value of the state of charge;
when the working mode of the series battery pack is a charging mode and the error electric quantity is a negative number, subtracting the compensation electric quantity from the initial display value of the state of charge;
when the working mode of the series battery pack is a discharging mode and the error electric quantity is a positive number, adding the compensation electric quantity to the initial display value of the state of charge;
and when the working mode of the series battery pack is a discharging mode and the error electric quantity is a negative number, subtracting the compensation electric quantity from the initial charge state display value.
As an achievable optimal manner, before the state of charge modification initial value is modified according to the compensation electric quantity in the residual compensation time, the method further includes:
when the initial display value of the state of charge is larger than or equal to a first threshold value, correcting the initial value of the state of charge modification according to the compensation electric quantity, wherein the first threshold value is a threshold value which is set by the series battery pack in a charging mode and used for triggering correction; alternatively, the first and second electrodes may be,
and when the initial display value of the state of charge is smaller than or equal to a second threshold value, correcting the initial display value of the state of charge according to the compensation electric quantity, wherein the second threshold value is a threshold value which is set by the series battery pack in a discharge mode and used for triggering correction.
As an achievable optimal manner, determining the remaining compensation time according to the initial display value of the state of charge and the working mode of the series battery pack comprises:
when the working mode of the series battery pack is a charging mode, determining the time required by the series battery pack to charge from the initial charge state display value to the full charge state of the series battery pack as the residual compensation time;
and when the working mode of the series battery pack is a discharging mode, determining the time required by the series battery pack to discharge from the initial charge state display value to the emptying state of the series battery pack as the residual compensation time.
As an achievable optimal way, the obtaining of the true state of charge value of the battery comprises:
acquiring a voltage-battery capacity mapping curve established by temperature;
selecting a voltage-battery capacity mapping curve corresponding to the current temperature according to the current temperature of the series battery pack;
acquiring the open-circuit voltage of the series battery pack at the current temperature according to the working mode of the series battery pack;
and obtaining the true value of the state of charge of the series battery pack at the current temperature based on a voltage-battery capacity mapping curve corresponding to the open-circuit voltage at the current temperature and the current temperature.
As an achievable optimal manner, the obtaining of the true value of the state of charge of the battery further includes:
acquiring a voltage-battery capacity mapping curve established by temperature and charge-discharge multiplying power;
selecting a voltage-battery capacity mapping curve corresponding to the current temperature and the current charge and discharge multiplying power according to the current temperature and the current charge and discharge multiplying power of the series battery pack;
acquiring the open-circuit voltage of the series battery pack at the current temperature according to the working mode of the series battery pack;
and obtaining the true value of the state of charge of the series battery pack at the current temperature based on the voltage-battery capacity mapping curve corresponding to the open-circuit voltage at the current temperature, the current temperature and the current charge and discharge multiplying power.
The invention provides a device for correcting the state of charge of a battery, which comprises:
the acquiring unit is used for acquiring the initial display value of the state of charge of the series battery pack at the current moment and the true value of the state of charge of the series battery pack at the current moment;
the calculation unit is used for calculating error electric quantity according to the actual value of the state of charge and the initial display value of the state of charge;
the determining unit is used for determining the residual compensation time according to the actual value of the state of charge and the working mode of the series battery pack;
and the correction unit is used for uniformly correcting the initial charge state display value by using the error electric quantity within the residual compensation time to obtain a corrected charge state modification display value at the current moment.
The invention provides a terminal device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor is used for implementing the method for correcting the state of charge of the battery when executing the program.
The present invention provides a computer-readable storage medium having stored thereon a computer program for implementing the method of correcting the state of charge of a battery as described.
According to the method, the initial charge state display value is uniformly corrected according to the working mode and the error electric quantity of the series battery pack within the residual compensation time, and the high-precision charge state correction display value is obtained; the established voltage-battery capacity mapping curve simultaneously considers two factors of temperature, charging and discharging multiplying power to establish a binary mapping relation, and the degree of fitting with the actual state of charge is higher; under the charging working condition and the discharging working condition, the initial display value SOC of the state of charge n20% or less, chargeInitial state display value SOCnGreater than or equal to 80%, initial display value SOC for state of chargenThe correction range is wide; initial display value SOC of charge state appearing under charging and discharging working conditionsnGreater than the true value of the state of charge SOCmOr initial state of charge display value SOCnLess than true state of charge SOCmThe smoothing can be carried out by compensating the electric quantity before the cut-off voltage is reached, the stepped jump of the SOC is avoided, and the smoothing effect of the SOC is good.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
FIG. 1 is a flow chart of a method of correcting a state of charge of a battery according to an embodiment of the present application;
fig. 2 is a voltage-battery capacity mapping curve according to an embodiment of the present application.
FIG. 3 is a topology diagram of a method of correcting a state of charge of a battery according to an embodiment of the present application;
FIG. 4 is a first graph illustrating the effect of correcting the SOC value of a battery under charging conditions according to an embodiment of the present disclosure;
FIG. 5 is a second graph illustrating the effect of correcting the SOC value of a battery under charging conditions according to an embodiment of the present application;
FIG. 6 is a graph I showing the effect of correcting the SOC value of a battery under discharge conditions according to an embodiment of the present application;
fig. 7 is a second diagram illustrating the effect of correcting the state of charge value of the battery under the discharging condition according to the embodiment of the present application.
Fig. 8 is a schematic structural diagram of a computer system of a terminal device or a server according to an embodiment of the present application.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant application and are not limiting of the application. 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 application. It should be noted that, for the convenience of description, only the portions relevant to the application are shown in the drawings.
In the field of new energy electric automobiles, a power storage battery pack is composed of battery packs connected in series. The state of charge of the series battery pack is an important index, namely, the ratio of the electric quantity actually provided in the current state to the electric quantity provided by the fully charged battery pack is represented by soc (state of charge). The state of charge (SOC) is an important basis for the whole vehicle control system to formulate an optimal energy management strategy, the SOC is accurately estimated, and the method has important significance for prolonging the service life of the series battery pack, improving the safety and reliability of the series battery pack and improving the performance of the new energy electric vehicle.
The charge state display value is displayed on a display screen of the client, so that a user can conveniently check the charge state display value in real time. The state of charge display value represents the amount of charge currently remaining in the series battery pack. The actual SOC value is defined based on the rated capacity of the series battery pack and is used for representing the current actual residual capacity of the series battery pack.
After a Battery Management System (BMS) of a new energy electric vehicle is powered on, a certain corresponding relationship, called a mapping function for short, is generally made between a true charge state value and a charge state display value. The application range of the vehicle power battery SOC is generally 15% -95%, the SOC display value and the actual SOC value are mapped, and the application range of 80% of the vehicle power battery SOC is stretched to 100% for display. I.e. 15% for 0 and 95% for 100%.
In order to improve the accuracy of the charge state display value, the invention provides a method for correcting the charge state of a battery, which is used for correcting the charge state display value, improving the precision and the accuracy of the charge state display value, and is beneficial to prolonging the service life of a series battery pack and improving the safety and the reliability of the series battery pack.
Fig. 1 shows a method of correcting the state of charge of a battery, comprising the steps of:
step S10, acquiring the current time of the series battery packInitial display value SOC of charge statenAnd the actual state of charge SOC at the current momentm；
S11, acquiring the true SOC valuem。
Method for acquiring true value SOC of battery state of charge by adopting open-circuit voltage methodmThe open-circuit voltage method is only suitable for the parking state of the new energy electric vehicle and cannot be used for online and dynamic estimation, namely the open-circuit voltage method cannot be applied to the new energy electric vehicle under the charging and discharging working conditions. Open circuit voltage, that is, terminal voltage of a battery in an open circuit state, is expressed by ocv (open circuit voltage), and it is generally considered that after the battery is left standing for a long time (1h to 3h) after being charged or discharged, the battery is free from polarization influence and reaches a stable state, and at this time, the voltage across the battery is the open circuit voltage.
Obtaining the true value SOC of the state of chargemThe method comprises the following steps:
acquiring a voltage-battery capacity mapping curve established by temperature and charge-discharge multiplying power;
the battery monomer of the series battery pack is used as a test correspondence, and the cut-off voltage is 3.0V-3.8V. The temperature was-10 ℃, 0 ℃, 10 ℃, 20 ℃, 30 ℃, 40 ℃ and 50 ℃, the charge rate (discharge rate) was 0.1C, 0.2C, 0.3C, 0.4C, 0.5C, 0.6C, 0.7C, 0.8C, 0.9C and 1.0C, and one of-10 ℃ to 50 ℃ and one of 0.1C to 1.0C were selected to obtain the corresponding voltage-battery capacity mapping curve.
Referring to fig. 2, a voltage-battery capacity mapping curve corresponding to a discharge rate of 0.5C and a temperature of-10 ℃ is obtained, which includes the following steps:
s111: the cell was charged to its upper limit voltage of 3.8V at-10 ℃.
S112: standing the fully charged battery in the S111 for 3h in an environment at-10 ℃, and recording the current OCV value V111. Then, the discharge rate was 0.5C to 3.7V, and after standing for 2 hours, the current OCV value V was recorded112And the current discharge capacity C112。
S113: continuously discharging the battery processed by S112 to 3.6V at the discharge rate of 0.5C at the current temperature, standing for 2h, and recordingRecording the current OCV value V113And the current discharge capacity C113。
S114: continuously discharging the battery processed by S113 to 3.5V at the discharge rate of 0.5C at the current temperature, standing for 2h, and recording the current OCV value V114And the current discharge capacity C114。
S115: continuously discharging the battery processed by S114 to 3.4V at the discharge rate of 0.5C at the current temperature, standing for 2h, and recording the current OCV value V115And the current discharge capacity C115。
S116: continuously discharging the battery processed by S115 to 3.3V at the discharge rate of 0.5C at the current temperature, standing for 2h, and recording the current OCV value V116And the current discharge capacity C116。
S117: continuously discharging the battery processed by S116 to 3.2V at the discharge rate of 0.5C at the current temperature, standing for 2h, and recording the current OCV value V117And the current discharge capacity C117。
S118: continuously discharging the battery processed by the S117 to 3.1V at the discharge rate of 0.5C at the current temperature, standing for 2h, and recording the current OCV value V118And the current discharge capacity C118。
S119: continuously discharging the battery processed by S118 to 3.0V at the discharge rate of 0.5C at the current temperature, standing for 2h, and recording the current OCV value V119And the current discharge capacity C119。
According to the OCV value V recorded in the above step111～V119And discharge capacity C112～C119The SOC values may be converted, one SOC value corresponding to one OCV value, to obtain a voltage-battery capacity mapping curve.
II, selecting a voltage-battery capacity mapping curve corresponding to the current temperature and the current charge and discharge multiplying power according to the current temperature and the current charge and discharge multiplying power of the series battery pack;
and III, acquiring the open-circuit voltage of the series battery pack at the current temperature according to the working mode of the series battery pack.
And acquiring the open-circuit voltage of the series battery pack according to whether the discharge rate or the charge rate of the series battery pack changes to be less than 0.1C within 1 minute. And if the discharge rate or the charge rate of the series battery pack changes to be less than 0.1C within 1 minute, the voltage at the two ends of the series battery pack is considered to be stable, and the voltage at the two ends of the series battery pack is the open-circuit voltage of the series battery pack. If the discharge rate or the charge rate of the series battery pack changes by more than 0.1C within 1 minute, the voltage at the two ends of the series battery pack is considered to be unstable, and the series battery pack needs to be kept standing for a certain time until the voltage at the two ends of the series battery pack is stable.
IV, obtaining a true SOC value of the series battery pack at the current temperature based on a voltage-battery capacity mapping curve corresponding to the open-circuit voltage, the current temperature and the current charge and discharge multiplying power at the current temperaturem。
In consideration of the balance difference between the batteries in the series battery pack, the highest battery voltage charged to the cutoff voltage first is selected as the open-circuit voltage under the charging condition, and the lowest battery voltage discharged to the cutoff voltage first is selected as the open-circuit voltage under the discharging condition.
S12, obtaining initial state of charge display value SOCn。
Method for acquiring initial display value SOC of state of charge by adopting ampere-hour integration methodn. The ampere-hour integration method is to estimate the state of charge, and in the charging process (discharging process), the electric quantity change value is obtained by integrating the discharging multiplying factor (charging multiplying factor) with the time.
Therein, SOCoIs an initial value of the state of charge; c is the battery capacity; and I is the charge or discharge rate.
However, the estimation accuracy of the ampere-hour integration method depends on the initial value SOC of the state of chargeo. For initial value of state of charge SOCoBecause the current value is collected inaccurately, the error is accumulated continuously, and the SOC value of the battery is estimated inaccurately。
Step S20, according to the true SOC valuemAnd initial state of charge display value SOCnCalculating error electric quantity;
according to step S10, acquiring initial state-of-charge display value SOC of series battery pack at current momentnAnd the actual state of charge SOC at the current momentmInitial state of charge display value SOC at presentnActual state of charge SOC with current timemAnd multiplying the difference value by the battery capacity C of the series battery pack to obtain the error electric quantity.
The working mode of the series battery pack comprises a charging working condition and a discharging working condition.
Under the charging working condition, the charging of the series battery pack does not reach the highest voltage, namely the initial display value SOC of the state of chargenIf < 100%, the initial display value SOC of the state of chargenThe first error electric quantity from full charge to 100% is Q1，
Q1＝(1-SOCn)*C
Where C is the battery capacity and I is the charge rate.
Under the discharge working condition, the discharge of the series battery pack does not reach the cut-off lowest voltage, namely the initial display value SOC of the state of chargenIf greater than 0%, the initial display value SOC of the state of chargenThe second error electric quantity from emptying to 0% is Q2，
Q2＝SOCn*C
Wherein C is the battery capacity and I is the discharge rate.
Step S30, according to initial display value SOC of state of chargenDetermining the residual compensation time according to the working mode of the series battery pack;
the working mode of the series battery pack comprises a charging working condition and a discharging working condition.
Under the charging working condition, the charging of the series battery pack does not reach the highest voltage, namely the initial display value SOC of the state of chargenIf < 100%, the initial display value SOC of the state of chargenA first residual compensation time T from full to 100%1，
Where C is the battery capacity and I is the charge rate.
Under the discharge working condition, the discharge of the series battery pack does not reach the cut-off lowest voltage, namely the initial display value SOC of the state of chargenIf greater than 0%, the initial display value SOC of the state of chargenSecond residual compensation time T from emptying to 0%2，
Wherein C is the battery capacity and I is the discharge rate.
It should be noted that, during the remaining compensation time, the compensation electric quantity is used to compensate the initial value SOC of the state of chargenBefore correction, the initial state of charge display value SOC is needednGreater than or equal to a first threshold value, or state of charge initial display value SOCnLess than or equal to the second threshold.
Initial display value SOC in state of chargenWhen the value is larger than or equal to the first threshold value, the initial display value SOC of the state of charge is displayed according to the compensation electric quantitynCorrection is performed, the first threshold value is a threshold value for correction set in the charging mode of the series battery pack, and the first threshold value is 80%. When the initial state of charge display value SOCnMore than or equal to 80%, initial display value SOC to charge statenAnd (7) correcting.
Initial display value SOC in state of chargenWhen the value is less than or equal to the second threshold value, the initial display value SOC of the state of charge is measured according to the compensation electric quantitynCorrection is performed, and the second threshold value is a threshold value for correction set in the discharge mode of the series battery pack. The second threshold is 20%. When the initial state of charge display value SOCnWhen the initial display value SOC of the state of charge is less than or equal to 20 percentnAnd (6) correcting.
Referring to fig. 3, step S40, the series-connected battery packs are uniformly charged according to the operation mode and the error capacity of the battery packs during the remaining compensation timeInitial display value SOC of electric statenCorrecting to obtain the corrected SOC modification display value SOC at the current momentk。
According to the working mode and error electric quantity of the series battery pack, the initial display value SOC of the state of chargenThe correction is carried out, and the method comprises the following steps:
s41, determining a compensation ratio relation according to the battery power display interval time and the residual compensation time;
Δ t is the time interval from the next time point of charge state display value to the current time point of charge state display value.
S42, determining a compensation electric quantity Q according to the relation between the error electric quantity and the compensation ratio;
under the working condition of charging, the battery is charged,
under the working condition of discharging, the discharge tube is connected with the discharge tube,
in summary, under the charging or discharging condition, the compensation electric quantity Q
Wherein T is T1Or T2And C is the battery capacity.
S43, according to the working mode and the compensation electric quantity of the series battery pack, the initial display value SOC of the state of chargenAnd (6) correcting.
S431, calculating the percentage of the compensation electric quantity Q to the battery capacity C;
s432, the percentage and the initial display value SOC of the state of chargenAs a sum of the state of charge modification display value SOCk；
As shown in FIG. 4, under the charging condition, the actual SOC valuem< initial state of charge display value SOCn(ii) a If Δ SOC is negative and the compensation electric quantity Q is negative, the initial display value SOC in the state of chargenThe compensation electric quantity is subtracted to slow down the initial display value SOC of the state of chargenRaised to form a state of charge modified display value SOCk。
As shown in FIG. 5, under the charging condition, the actual SOC valuemInitial display value SOC of state of chargen(ii) a If delta SOC is positive and the compensation electric quantity Q is positive, the compensation electric quantity Q is added to the initial display value of the state of charge to accelerate the initial display value SOC of the state of chargenRaised to form a state of charge modified display value SOCk。
As shown in FIG. 6, the actual SOC value is shown in the discharging conditionm< initial display value of State of Charge SOCn(ii) a If Δ SOC is negative and the compensation electric quantity Q is negative, the compensation electric quantity Q is subtracted from the initial display value of the state of charge to accelerate the initial display value SOC of the state of chargenDecrease to form a state of charge modified display value SOCk。
As shown in FIG. 7, the actual SOC value is shown in the discharging conditionmInitial display value SOC of state of chargen(ii) a If delta SOC is positive and the compensation electric quantity Q is positive, the compensation electric quantity Q is added to the initial display value of the state of charge to slow down the initial display value SOC of the state of chargenDecrease to form a state of charge modified display value SOCkAnd (4) descending.
Compared with the related art, the method for correcting the state of charge of the battery has the following advantages:
1. the voltage-battery capacity mapping curve established by the scheme simultaneously considers two factors of temperature, charging and discharging multiplying power to establish a binary mapping relation, and the degree of fitting with the actual state of charge is higher.
2. The scheme can realize the charge state under the charging working condition and the discharging working conditionInitial display value SOCnNot more than 20%, initial display value SOC of state of chargenNot less than 80%, initial value SOC of charge statenThe correction range of (2) is wide.
3. Initial display value SOC of charge state appearing under charging and discharging working conditionsnGreater than the true value of the state of charge SOCmOr initial state of charge display value SOCnLess than true state of charge SOCmThe smoothing can be carried out by compensating the electric quantity before the cut-off voltage is reached, the stepped jump of the SOC is avoided, and the smoothing effect of the SOC is good.
The invention also provides a device for correcting the state of charge of the battery, which comprises:
the acquiring unit is used for acquiring the initial display value of the state of charge of the series battery pack at the current moment and the true value of the state of charge of the series battery pack at the current moment;
the computing unit is used for computing the error electric quantity according to the actual value of the state of charge and the initial display value of the state of charge;
the determining unit is used for determining the residual compensation time according to the actual value of the state of charge and the working mode of the series battery pack;
and the correction unit is used for correcting the initial charge state display value by utilizing the error electric quantity in the residual compensation time to obtain a corrected charge state modification display value at the current moment.
An apparatus provided by an embodiment of the present application includes a memory, a processor, and a computer program stored on the memory and executable on the processor, and the processor implements the method for determining the estimated arrival time as described above when executing the program. Referring to fig. 8, fig. 8 is a schematic structural diagram of a computer system of a terminal device or a server according to an embodiment of the present application.
As shown in fig. 8, the computer system 1300 includes a Central Processing Unit (CPU)1301 that can perform various appropriate actions and processes according to a program stored in a Read Only Memory (ROM)1302 or a program loaded from a storage section 1303 into a Random Access Memory (RAM) 1303. In the RAM 1303, various programs and data necessary for the operation of the system 1300 are also stored. The CPU 1301, the ROM1302, and the RAM 1303 are connected to each other via a bus 1304. An input/output (I/O) interface 1305 is also connected to bus 1304.
The following components are connected to the I/O interface 1305: an input portion 1306 including a keyboard, a mouse, and the like; an output section 1307 including a display such as a Cathode Ray Tube (CRT), a Liquid Crystal Display (LCD), and the like, and a speaker; a storage portion 1308 including a hard disk and the like; and a communication section 1309 including a network interface card such as a LAN card, a modem, or the like. The communication section 1309 performs communication processing via a network such as the internet. A drive 1310 is also connected to the I/O interface 1305 as needed. A removable medium 1311 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, or the like is mounted on the drive 1310 as needed, so that a computer program read out therefrom is mounted in the storage section 1308 as needed.
In particular, according to embodiments of the application, the processes described above with reference to the flow diagrams may be implemented as computer software programs. For example, embodiments of the present application include a computer program product comprising a computer program embodied on a machine-readable medium, the computer program comprising program code for performing the method illustrated in the flow chart. In such an embodiment, the computer program may be downloaded and installed from a network through the communication section 1303 and/or installed from the removable medium 1311. The computer program executes the above-described functions defined in the system of the present application when executed by a Central Processing Unit (CPU) 1301.
It should be noted that the computer readable medium shown in the present application may be a computer readable signal medium or a computer readable storage medium or any combination of the two. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples of the computer readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the present application, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. In this application, however, a computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wire, fiber optic cable, RF, etc., or any suitable combination of the foregoing.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
The units or modules described in the embodiments of the present application may be implemented by software or hardware. The described units or modules may also be provided in a processor, and may be described as: a processor, comprising: the device comprises an acquisition unit, a calculation unit, a determination unit and a correction unit. The names of these units or modules do not in some cases constitute a limitation to the units or modules themselves, and for example, the acquiring unit may also be described as a unit for acquiring the initial display value of the state of charge of the series battery pack at the present time and the true value of the state of charge of the series battery pack at the present time.
As another aspect, the present application also provides a computer-readable storage medium, which may be included in the electronic device described in the above embodiments; or may be separate and not incorporated into the electronic device. The computer readable storage medium stores one or more programs which, when executed by one or more processors, perform the methods for determining an estimated time of arrival described herein: acquiring the road section characteristics of each road section in the route to be estimated; carrying out attention weight distribution on the road section characteristics of each road section to obtain the route characteristics of the route to be estimated; and predicting the expected arrival time corresponding to the route to be estimated by using the route characteristics.
In summary, according to the method, the apparatus, the device, and the medium for correcting the state of charge of the battery provided in this embodiment, the initial display value of the state of charge of the series battery at the current time and the true value of the state of charge of the series battery at the current time are obtained; calculating error electric quantity according to the actual value of the state of charge and the initial display value of the state of charge; determining the residual compensation time according to the actual value of the state of charge and the working mode of the series battery pack; and in the residual compensation time, correcting the initial charge state display value according to the working mode of the series battery pack and the error electric quantity to obtain a corrected charge state modification display value at the current moment. The charge state of the scheme under the working conditions of charging and dischargingInitial display value SOCnGreater than the true value of the state of charge SOCmOr initial state of charge display value SOCnLess than true state of charge SOCmThe smoothing can be carried out by compensating the electric quantity before the cut-off voltage is reached, the stepped jump of the SOC is avoided, and the smoothing effect of the SOC is good.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (10)
1. A method of modifying a state of charge of a battery, comprising:
acquiring an initial display value of the state of charge of the series battery pack at the current moment and a true value of the state of charge of the series battery pack at the current moment;
calculating error electric quantity according to the actual value of the state of charge and the initial display value of the state of charge;
determining the residual compensation time according to the actual value of the state of charge and the working mode of the series battery pack;
and in the residual compensation time, correcting the initial charge state display value according to the working mode of the series battery pack and the error electric quantity to obtain a corrected charge state modification display value at the current moment.
2. The method of modifying battery state of charge of claim 1, wherein uniformly modifying said initial state of charge display based on said operating mode of said series connected battery pack and said error charge comprises:
determining a compensation ratio relation according to the battery power display interval time and the residual compensation time;
determining compensation electric quantity according to the relation between the error electric quantity and the compensation ratio;
and correcting the initial display value of the state of charge according to the working mode of the series battery pack and the compensation electric quantity.
3. The method of modifying battery state of charge of claim 2, wherein modifying said initial state of charge display based on said mode of operation of said series connected battery pack and said compensation charge comprises:
when the working mode of the series battery pack is a charging mode and the error electric quantity is a positive number, the compensation electric quantity is added to the initial display value of the state of charge;
when the working mode of the series battery pack is a charging mode and the error electric quantity is a negative number, subtracting the compensation electric quantity from the initial display value of the state of charge;
when the working mode of the series battery pack is a discharging mode and the error electric quantity is a positive number, adding the compensation electric quantity to the initial display value of the state of charge;
and when the working mode of the series battery pack is a discharging mode and the error electric quantity is a negative number, subtracting the compensation electric quantity from the initial charge state display value.
4. The method of claim 1, wherein before the step of modifying the initial state of charge display according to the compensation charge during the remaining compensation time, the method further comprises:
when the initial display value of the state of charge is larger than or equal to a first threshold value, correcting the initial display value of the state of charge according to the compensation electric quantity, wherein the first threshold value is a threshold value which is set by the series battery pack in a charging mode and used for triggering correction; alternatively, the first and second electrodes may be,
and when the initial display value of the state of charge is smaller than or equal to a second threshold value, correcting the initial display value of the state of charge according to the compensation electric quantity, wherein the second threshold value is a threshold value which is set by the series battery pack in a discharge mode and used for triggering correction.
5. The method of modifying battery state of charge of claim 1, wherein determining a remaining compensation time based on said initial state of charge display value and an operating mode of said series connected battery pack comprises:
when the working mode of the series battery pack is a charging mode, determining the time required by the series battery pack to charge from the initial charge state display value to the full charge state of the series battery pack as the residual compensation time;
and when the working mode of the series battery pack is a discharging mode, determining the time required by the series battery pack to discharge from the initial charge state display value to the emptying state of the series battery pack as the residual compensation time.
6. The method for modifying the state of charge of a battery according to claim 1, wherein said obtaining the true state of charge value of the battery comprises:
acquiring a voltage-battery capacity mapping curve established by temperature;
selecting a voltage-battery capacity mapping curve corresponding to the current temperature according to the current temperature of the series battery pack;
acquiring the open-circuit voltage of the series battery pack at the current temperature according to the working mode of the series battery pack;
and obtaining the true value of the state of charge of the series battery pack at the current temperature based on a voltage-battery capacity mapping curve corresponding to the open-circuit voltage at the current temperature and the current temperature.
7. The method of modifying battery state of charge of claim 1, wherein said obtaining a true state of charge value of the battery further comprises:
acquiring a voltage-battery capacity mapping curve established by temperature and charge-discharge multiplying power;
selecting a voltage-battery capacity mapping curve corresponding to the current temperature and the current charge and discharge multiplying power according to the current temperature and the current charge and discharge multiplying power of the series battery pack;
acquiring the open-circuit voltage of the series battery pack at the current temperature according to the working mode of the series battery pack;
and obtaining the true value of the state of charge of the series battery pack at the current temperature based on the voltage-battery capacity mapping curve corresponding to the open-circuit voltage at the current temperature, the current temperature and the current charge and discharge multiplying power.
8. An apparatus for correcting a state of charge of a battery, comprising:
the acquiring unit is used for acquiring the initial display value of the state of charge of the series battery pack at the current moment and the true value of the state of charge of the series battery pack at the current moment;
the calculation unit is used for calculating error electric quantity according to the actual value of the state of charge and the initial display value of the state of charge;
the determining unit is used for determining the residual compensation time according to the actual value of the state of charge and the working mode of the series battery pack;
and the correction unit is used for uniformly correcting the initial charge state display value by using the error electric quantity within the residual compensation time to obtain a corrected charge state modification display value at the current moment.
9. A terminal device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor being configured to implement the method of modifying battery state of charge according to any one of claims 1 to 7 when the program is executed.
10. A computer-readable storage medium having stored thereon a computer program for implementing the method of modifying battery state of charge of any of claims 1-7.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011430004.5A CN114609530A (en) | 2020-12-09 | 2020-12-09 | Method, device, equipment and medium for correcting battery state of charge |
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| CN202011430004.5A CN114609530A (en) | 2020-12-09 | 2020-12-09 | Method, device, equipment and medium for correcting battery state of charge |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115015787A (en) * | 2022-08-09 | 2022-09-06 | 深圳国瑞协创储能技术有限公司 | Battery SOC compensation method, device and equipment and computer readable storage medium |
| CN115308645A (en) * | 2022-07-14 | 2022-11-08 | 国电宁波风电开发有限公司 | Parameter configuration standardization method for variable pitch control system |
| CN116754966A (en) * | 2023-08-16 | 2023-09-15 | 浙江艾罗网络能源技术股份有限公司 | Calibration method and device for battery state of charge, electronic equipment and storage medium |
-
2020
- 2020-12-09 CN CN202011430004.5A patent/CN114609530A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115308645A (en) * | 2022-07-14 | 2022-11-08 | 国电宁波风电开发有限公司 | Parameter configuration standardization method for variable pitch control system |
| CN115015787A (en) * | 2022-08-09 | 2022-09-06 | 深圳国瑞协创储能技术有限公司 | Battery SOC compensation method, device and equipment and computer readable storage medium |
| CN115015787B (en) * | 2022-08-09 | 2022-11-18 | 深圳国瑞协创储能技术有限公司 | Battery SOC compensation method, device and equipment and computer readable storage medium |
| CN116754966A (en) * | 2023-08-16 | 2023-09-15 | 浙江艾罗网络能源技术股份有限公司 | Calibration method and device for battery state of charge, electronic equipment and storage medium |
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