CN111913111B - Discharge power correction method and device, storage medium and electronic equipment - Google Patents
Discharge power correction method and device, storage medium and electronic equipment Download PDFInfo
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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]
- G01R31/374—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] with means for correcting the measurement for temperature or ageing
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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
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- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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Abstract
The present disclosure relates to a discharge power correction method, apparatus, storage medium, and electronic device, the method including: detecting whether the vehicle has under-voltage in the running process according to the discharge power; acquiring undervoltage information corresponding to the current undervoltage moment when the undervoltage of the vehicle is detected; determining updated correction power according to the initial correction power, the lowest voltage of all the single battery voltages in the battery pack and the preset voltage of the single battery in the battery pack; and replacing the correction power matched with the residual capacity of the battery pack, the aging degree of the battery pack and the temperature of the battery pack according to the updated correction power. On the premise of ensuring that the discharge power can be timely regulated, the problem that the discharge power estimation accuracy of the battery of the electric vehicle is reduced along with the increase of the aging degree of the battery is solved.
Description
Technical Field
The disclosure relates to the technical field of power batteries, and in particular relates to a discharge power correction method, a device, a storage medium and electronic equipment.
Background
As the amount of electric vehicles held in the automotive market increases, the user experience of electric vehicles is getting more and more important. On the premise of ensuring the safety and the service life of the power battery system, the discharge power performance of the power battery system is fully exerted, and a guarantee is provided for a user to obtain good power experience, so that the requirement on the estimation accuracy of the discharge power of the power battery system is provided.
In the related art, a table look-up method or a closed-loop control method of cell voltage is generally used to obtain the discharge power. However, the table look-up method for obtaining the discharge power has a problem that the accuracy of estimating the aging state of the electric vehicle cannot be ensured after the electric vehicle is used for a certain period of time, thereby causing the accuracy of estimating the discharge power using the table look-up method to decrease as the aging degree of the battery increases; the method for closed-loop control of the voltage of the single battery has high estimation accuracy of the discharge power, but the problem of untimely adjustment of the discharge power caused by slow response of a battery system may exist.
Disclosure of Invention
The purpose of the present disclosure is to provide an electronic device, which solves the problem that the estimation accuracy of the discharge power of the battery of an electric vehicle decreases with the increase of the aging degree of the battery on the premise of ensuring that the discharge power can be adjusted in time by correcting the correction power in the correction power meter.
To achieve the above object, in a first aspect, the present disclosure provides a discharge power correction method, the method comprising:
detecting whether the vehicle is under-voltage or not in the running process according to the discharge power, wherein the discharge power is the sum of the base power and the initial correction power;
when the vehicle is detected to be under-voltage, under-voltage information corresponding to the current under-voltage moment is acquired, wherein the under-voltage information comprises the lowest voltage of the residual capacity of a battery pack, the aging degree of the battery pack, the temperature of the battery pack and the voltages of all single batteries in the battery pack;
determining updated correction power according to the initial correction power, the lowest voltage of all the single battery voltages in the battery pack and the preset voltage of the single battery in the battery pack;
and replacing the correction power matched with the residual capacity of the battery pack, the aging degree of the battery pack and the temperature of the battery pack according to the updated correction power.
Optionally, the determining the updated correction power includes:
obtaining updated correction power by adopting a preset calculation formula, wherein the calculation formula is as follows:
P 2 ＝P 1 *(1-(V-V 1 )/V)；
wherein P is 2 For the updated correction power, P 1 For the initial correction power, V is the preset voltage of the single battery in the battery pack, V 1 Is the lowest voltage of all the cell voltages in the battery pack.
Optionally, the method further comprises:
acquiring the residual capacity of a battery pack acquired in the running process of the vehicle in real time; and is combined with the other components of the water treatment device,
recording the change time of the collected residual electric quantity of the battery pack;
when the undervoltage of the vehicle is detected, acquiring undervoltage information corresponding to the current undervoltage moment comprises the following steps: acquiring at least one target parameter, wherein the target parameter comprises the accumulated discharge capacity of the battery pack in a time period from the change time to the current under-voltage time and/or a difference value between the current under-voltage time and the change time;
and under-voltage information corresponding to the current under-voltage moment is acquired under the condition that the at least one target parameter meets the corresponding preset condition.
Optionally, the target parameter includes the accumulated discharge capacity, and correspondingly, the method further includes:
and when the accumulated discharge capacity is lower than the product of the rated capacity of the battery pack and the aging degree of the battery pack corresponding to the change moment, determining that the accumulated discharge capacity meets the corresponding preset condition.
Optionally, the target parameter includes a difference between the current under-voltage moment and the change moment, and accordingly the method further includes:
and when the difference value is lower than a preset time threshold value, determining that the difference value meets a corresponding preset condition.
Optionally, the detecting whether the vehicle has an under-voltage during operation according to the discharge power includes:
acquiring basic power and initial correction power of a vehicle at the current moment;
and taking the sum of the basic power and the initial correction power as the discharge power of the vehicle, and determining that the vehicle has undervoltage when the actual single battery voltage of the single battery in the battery pack in the running process of the vehicle according to the discharge power is smaller than the preset voltage.
In a second aspect, the present disclosure also provides a discharge power correction device, the device comprising:
the detection module is used for detecting whether the vehicle is under-voltage or not in the running process according to the discharge power, wherein the discharge power is the sum of the basic power and the initial correction power;
the first acquisition module is used for acquiring undervoltage information corresponding to the current undervoltage moment when the vehicle is detected to be undervoltage, wherein the undervoltage information comprises the residual capacity of a battery pack, the aging degree of the battery pack, the temperature of the battery pack and the lowest voltage of all single battery voltages in the battery pack;
the determining module is used for determining updated correction power according to the initial correction power, the lowest voltage of all the single battery voltages in the battery pack and the preset voltage of the single battery in the battery pack;
and the correction module is used for replacing the correction power matched with the battery pack residual capacity, the battery pack aging degree and the battery pack temperature according to the updated correction power.
Optionally, the apparatus further comprises:
the second acquisition module is used for acquiring the residual capacity of the battery pack acquired in the running process of the vehicle in real time; and is combined with the other components of the water treatment device,
recording the change time of the collected residual electric quantity of the battery pack;
the first acquisition module further includes:
the first acquisition submodule is used for acquiring at least one target parameter, wherein the target parameter comprises the accumulated discharge capacity of the battery pack in a time period from the change moment to the current under-voltage moment and/or a difference value between the current under-voltage moment and the change moment;
the second acquisition sub-module is used for acquiring the undervoltage information corresponding to the current undervoltage moment under the condition that the at least one target parameter meets the corresponding preset condition.
In a third aspect, the present disclosure also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements a discharge power correction method as described above.
In a fourth aspect, the present disclosure also provides an electronic device, including:
a memory having a computer program stored thereon;
a processor for executing the computer program in the memory to implement the discharge power correction method as described above.
Through the technical scheme, whether the vehicle is under-voltage or not in the running process according to the discharge power is detected, wherein the discharge power is the sum of the base power and the initial correction power; when the vehicle is detected to be under-voltage, under-voltage information corresponding to the current under-voltage moment is acquired, wherein the under-voltage information comprises the lowest voltage of the residual capacity of a battery pack, the aging degree of the battery pack, the temperature of the battery pack and the voltages of all single batteries in the battery pack; determining updated correction power according to the initial correction power, the lowest voltage of all the single battery voltages in the battery pack and the preset voltage of the single battery in the battery pack; and replacing the correction power matched with the residual capacity of the battery pack, the aging degree of the battery pack and the temperature of the battery pack according to the updated correction power. The method has the advantages that the discharge power of the electric vehicle battery is corrected under different battery pack residual electric quantity, different battery pack aging degrees and different battery pack temperatures, the problem that the discharge power estimation accuracy of the electric vehicle battery is reduced along with the increase of the battery aging degree is solved on the premise that the discharge power can be timely regulated, the estimation accuracy of the discharge power is improved, and further the electric vehicle is ensured to rapidly determine the discharge power of the electric vehicle according to the basic power and the correction power in the correction power meter in the actual running process.
Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:
fig. 1 is a flow chart of a discharge power correction method provided for the present disclosure.
Fig. 2 is another flow chart of a discharge power correction method provided for the present disclosure.
Fig. 3 is a functional block diagram of a discharge power correction device provided for the present disclosure.
Fig. 4 is a block diagram of an electronic device provided for the present disclosure.
Detailed Description
Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.
In the related art, a table look-up method and a single battery voltage closed-loop control method are mainly adopted to estimate the discharge supply. Specifically, the table lookup method is based on SOC (state of charge), SOH (state of health), and battery temperature, and the table lookup method respectively obtains instantaneous discharge power and continuous discharge power, and performs switching calculation between the two powers according to a policy, as the basic discharge power of the power battery system. However, the estimation accuracy of the table look-up method is poor, and main disadvantages include: after the electric vehicle is used for a period of time, the estimation accuracy of the battery aging state cannot be guaranteed, so that the discharge power accuracy estimated by table lookup is reduced along with the increase of the service life of the electric vehicle, and the table lookup method needs a large amount of bench calibration and whole vehicle verification tests, so that the workload is large, in addition, the discharge power estimation error is strongly dependent on the calibration quality, and the error is unavoidable.
The closed-loop regulation of the single battery voltage is mainly realized in a PID mode, although the estimation accuracy of the closed-loop control method of the single battery voltage is higher, the control parameters of the three items P/I/D have high requirements on calibration engineers, the calibration workload is larger, and the conditions of untimely regulation and the like are easy to occur if the response speed of a power battery system is low.
Therefore, the related art cannot solve the problem that the estimation accuracy of the discharge power of the battery of the electric vehicle is reduced along with the increase of the aging degree of the battery on the premise of ensuring the timely adjustment of the discharge power.
To solve the above-described problems, the present disclosure provides a discharge power correction method applicable to an electronic device, which may be, for example, a BMS (Battery Management System ). Referring to fig. 1, the discharge correction power method includes steps S110 to S140. Specific:
step S110: and detecting whether the vehicle is under-voltage in the operation process according to the discharge power.
It should be noted that, in the present embodiment, the vehicle is an electric vehicle. The vehicles described below may be electric vehicles.
In the present embodiment, the discharge power is the sum of the base power and the initial correction power. The basic power is characterized in that basic power data is obtained in advance through a bench test, and the robustness is good; the initial correction power is characterized in that the initial correction power is corrected according to different conditions, the accuracy of the initial correction power under different conditions depends on the number of iterative data, and when the number of iterative data is larger, the accuracy of the initial correction power under different conditions is higher, the accuracy of the discharge power is higher.
In this embodiment, according to different characteristics of the base power and the initial correction power, in consideration of implementation convenience, only the initial correction power may be corrected, and the base power is not updated, so that the dependence of the power estimation accuracy on the base power accuracy is reduced, and the workload of obtaining the base power and the requirements on data quality are reduced to a certain extent, so as to reduce the data obtaining cost.
In some embodiments, the electronic device may obtain the base power and the initial correction power via a look-up table. For example, the electronic device may obtain the base power according to a base power meter including a plurality of battery pack remaining amounts and a base power corresponding to each battery pack remaining amount. And the electronic equipment acquires the residual electric quantity of the battery pack of the vehicle in the running process, and matches the basic power corresponding to the residual electric quantity in a basic power meter according to the residual electric quantity. And obtaining initial basic power according to a correction power meter, wherein the correction power meter comprises a plurality of battery pack residual electric quantity, a plurality of battery pack aging degrees, and a plurality of battery pack temperature and a plurality of correction power association relations. The electronic equipment acquires the battery pack residual capacity, the battery pack aging degree and the battery pack temperature of the vehicle in the running process, matches correction power corresponding to the battery pack residual capacity, the battery pack aging degree and the battery pack temperature in a correction power meter according to the battery pack residual capacity, the battery pack aging degree and the battery pack temperature, and takes the correction power as initial correction power.
In this embodiment, if the electronic device does not detect that the vehicle is under-voltage during the running process according to the discharge power (the sum of the obtained base power and the initial correction power), it indicates that the initial correction power does not need to be corrected, and for the current conditions of the remaining battery power of the battery pack, the aging degree of the battery pack, and the temperature of the battery pack, the vehicle can obtain continuous power to the maximum extent without damaging the single battery in the battery pack when running according to the discharge power.
If the electronic equipment detects that the vehicle is under-voltage in the running process according to the discharge power, the vehicle cannot obtain better continuous power on the premise of ensuring that the service life and safety of the single battery are not influenced under the conditions of the current battery pack residual capacity, the battery pack aging degree and the battery pack temperature, so that the initial correction power is required to be corrected.
In some embodiments, whether the vehicle is under-voltage may be determined according to a mathematical relationship between an actual cell voltage of the vehicle in the battery pack after discharging according to the discharge power and a preset voltage of the cell in the battery pack. Illustratively, the step S110 specifically includes: firstly, acquiring basic power and initial correction power of a vehicle at the current moment; and then, taking the sum of the basic power and the initial correction power as the discharge power of the vehicle, and determining that the vehicle has undervoltage when the actual single cell voltage of the single cells in the battery pack in the running process of the vehicle according to the discharge power is smaller than the preset voltage. The preset voltage may be set according to actual requirements, which is not limited in this embodiment.
Step S120: and acquiring undervoltage information corresponding to the current undervoltage moment when the undervoltage of the vehicle is detected.
In this embodiment, the under-voltage information includes a remaining battery power of the battery pack, an aging degree of the battery pack, a temperature of the battery pack, and a minimum voltage of the unit cells in the battery pack.
It should be noted that, the lowest voltage of the unit cells in the battery pack is the lowest voltage of all the current unit cell voltages after discharging with the discharging power.
It can be understood that when the vehicle is under-voltage, it indicates that correction is required for the correction power corresponding to the remaining battery power, the aging degree of the battery pack and the temperature of the battery pack reflected at the current under-voltage moment in the correction power meter.
Step S130: and determining updated correction power according to the initial correction power, the lowest voltage of the single batteries in the battery pack and the preset voltage of the single batteries in the battery pack.
In some embodiments, the updated correction power may be obtained using a predetermined calculation formula:
P 2 ＝P 1 *(1-(V-V 1 )/V)；
wherein P is 2 For the updated correction power, P 1 For the initial correction power, V is the preset voltage of the single battery in the battery pack, V 1 Is the lowest voltage of the single battery in the battery pack.
It should be noted that, in the present embodiment, occurrence of the under-voltage indicates that the estimated discharge power is larger than the actual discharge power of the unit cell, and the purpose of the correction is to correct the estimated discharge power to the actual discharge power.
It can be understood that when the initial correction power is corrected, only the discharge power of the cell with the largest current discharge power is corrected, so that the estimated discharge power of all the cells can be corrected to the actual discharge power. Therefore, when the updated correction power is specifically calculated, the lowest voltage of the unit cells in the battery pack is selected as the lowest unit voltage of all the unit cells discharged with the discharge power. For example, taking the battery pack including the battery cell 1, the battery cell 2 and the battery cell 3 as an example, taking the battery cell 1, the battery cell 2 and the battery cell 3 after discharging with the discharge power as examples, respectively, 3.4 volts, 3.5 volts and 3.6 volts, the lowest voltage of the battery cell in the battery pack is 3.4 volts.
It should be noted that the preset voltage of the unit cells in the battery pack may be set according to actual requirements.
Step S140: and replacing the correction power matched with the residual capacity of the battery pack, the aging degree of the battery pack and the temperature of the battery pack according to the updated correction power.
In this embodiment, the updated correction power is replaced with the correction power matched with the remaining battery power of the battery pack, the aging degree of the battery pack and the temperature of the battery pack, so as to achieve the purpose of updating the correction power table, solve the problem that the estimation precision of the discharge power of the vehicle decreases with the increase of the aging degree of the battery, enable the vehicle to quickly obtain the correction power with higher precision according to the updated correction power table, obtain the correction power and the base power through a table lookup method, ensure that the discharge power can be timely adjusted in the running process of the vehicle, and further achieve the purpose that the user can obtain continuous power to the maximum extent without damaging the battery when the vehicle is used as the discharge power according to the sum of the correction power and the base power.
In the embodiment, the self-contained battery management system of the electric vehicle is adopted to accurately correct the basic discharge power of the power battery, and no additional hardware cost is required to be increased.
It will be appreciated that by repeating steps S110 to S140, infinite loop iterations of the correction power table may be achieved, and the accuracy of the correction power depends on the number of iterations. The same correction operation is carried out under different battery pack residual capacity, battery pack aging degree and battery temperature of the vehicle, and the discharge power correction of the vehicle in the full working condition range is realized.
In one possible implementation manner of the embodiment of the present disclosure, the electronic device may obtain, in real time, a remaining battery power of a battery pack collected during a running process of the vehicle; and recording the change time of the collected residual capacity of the battery pack. Thus, the step S120 may include: acquiring at least one target parameter, wherein the target parameter comprises the accumulated discharge capacity of the battery pack in a time period from the change time to the current under-voltage time and/or a difference value between the current under-voltage time and the change time; and under-voltage information corresponding to the current under-voltage moment is acquired under the condition that the at least one target parameter meets the corresponding preset condition. That is, as shown in fig. 2, another discharge power correction method provided by an embodiment of the present disclosure may include:
step S210: and detecting whether the vehicle is under-voltage in the operation process according to the discharge power.
Step S210 is similar to step S110 in fig. 1, and will not be described here.
Step S220: and acquiring the residual capacity of the battery pack acquired in the running process of the vehicle in real time, and recording the change moment of the acquired residual capacity of the battery pack.
The execution order of step S210 and step S220 is not limited, and is shown in parallel in fig. 2. Specifically, the electronic device may store the battery pack remaining capacity collected each time and the collection time into the database, and determine the change time of the battery pack remaining capacity by determining the difference between the battery pack remaining capacities stored before and after.
Step S230: acquiring at least one target parameter, and acquiring undervoltage information corresponding to the current undervoltage moment under the condition that the at least one target parameter meets the corresponding preset condition.
In some embodiments, the target parameter includes an accumulated discharge capacity of the battery pack over a period of time from the change time to the current under-voltage time. When the target parameter includes the accumulated discharge capacity, the corresponding preset condition includes whether the accumulated discharge capacity is lower than a product of the rated capacity of the battery pack and the aging degree of the battery pack corresponding to the change time, and when the accumulated discharge capacity is lower than a product of the rated capacity of the battery pack and the aging degree of the battery pack corresponding to the change time, the accumulated discharge capacity is determined to meet the corresponding preset condition.
In some embodiments, the target parameter comprises a difference between the current under-voltage time and the change time. When the target parameter includes the difference value, correspondingly, the corresponding preset condition includes whether the difference value is lower than a preset time threshold value, and when the difference value is lower than the preset time threshold value, it is determined that the difference value meets the corresponding preset condition.
The rated capacity of the battery pack is the sum of the rated capacities of all the single batteries.
It should be noted that, the preset time threshold is set manually, which is not limited in this embodiment. Preferably, the preset time threshold is 15 days.
Step S240: and determining updated correction power according to the initial correction power, the lowest voltage of the single batteries in the battery pack and the preset voltage of the single batteries in the battery pack.
Step S240 is similar to step S130 in fig. 1, and will not be described again here.
Step S250: and replacing the correction power matched with the residual capacity of the battery pack, the aging degree of the battery pack and the temperature of the battery pack according to the updated correction power.
Step S250 is similar to step S140 in fig. 1, and will not be described again here.
In this embodiment, by setting a certain preset condition, when the target parameter meets the preset condition corresponding to the setting, and after the under-voltage occurs, correction is performed on the correction power meter, so as to avoid excessive power consumption caused by frequent correction of the correction power meter.
Referring to fig. 3, an embodiment of the disclosure further provides a discharge power correction device, where the discharge power correction device includes:
the detection module is used for detecting whether the vehicle is under-voltage or not in the running process according to the discharge power, wherein the discharge power is the sum of the base power and the initial correction power.
The first acquisition module is used for acquiring undervoltage information corresponding to the current undervoltage moment when the vehicle is detected to be undervoltage, wherein the undervoltage information comprises the residual capacity of a battery pack, the aging degree of the battery pack, the temperature of the battery pack and the lowest voltage of all single battery voltages in the battery pack.
And the determining module is used for determining updated correction power according to the initial correction power, the lowest voltage of all the single battery voltages in the battery pack and the preset voltage of the single battery in the battery pack.
And the correction module is used for replacing the correction power matched with the battery pack residual capacity, the battery pack aging degree and the battery pack temperature according to the updated correction power.
Optionally, the detection module further includes:
the power acquisition sub-module is used for acquiring the basic power and the initial correction power of the vehicle at the current moment.
And the undervoltage detection sub-module takes the sum of the basic power and the initial correction power as the discharge power of the vehicle, and determines that the vehicle is undervoltage when the actual single battery voltage of the single battery in the battery pack in the running process of the vehicle according to the discharge power is smaller than the preset voltage.
Optionally, the determining module is specifically configured to obtain the updated correction power by using a preset calculation formula according to the initial correction power, a lowest voltage among all the voltages of the unit batteries in the battery pack, and a preset voltage of the unit batteries in the battery pack.
Optionally, the discharge power correction device further includes:
the second acquisition module is used for acquiring the residual capacity of the battery pack acquired in the running process of the vehicle in real time; recording the change time of the collected residual electric quantity of the battery pack;
the first acquisition module further includes:
the first acquisition submodule is used for acquiring at least one target parameter, wherein the target parameter comprises the accumulated discharge capacity of the battery pack in a time period from the change moment to the current under-voltage moment and/or a difference value between the current under-voltage moment and the change moment;
the second acquisition sub-module is used for acquiring the undervoltage information corresponding to the current undervoltage moment under the condition that the at least one target parameter meets the corresponding preset condition.
Optionally, in the case that the first obtaining module includes a first obtaining sub-module and a second obtaining sub-module, the first obtaining module further includes a first judging sub-module and a second judging sub-module. And the first judging submodule is used for judging whether the accumulated discharge capacity is lower than the product of the rated capacity of the battery pack and the aging degree of the battery pack corresponding to the change moment or not and determining that the accumulated discharge capacity meets the corresponding preset condition when the accumulated discharge capacity is lower than the product of the rated capacity of the battery pack and the aging degree of the battery pack corresponding to the change moment. And the second judging submodule is used for judging whether the difference value is lower than a preset time threshold value or not and determining that the accumulated discharge capacity meets the corresponding preset condition or not under the condition that the difference value is lower than the preset time threshold value or not.
The specific manner in which the various modules perform the operations in the apparatus of the above embodiments have been described in detail in connection with the embodiments of the method, and will not be described in detail herein.
The embodiment of the disclosure also provides an electronic device, including:
a memory having a computer program stored thereon;
and a processor, configured to execute the computer program in the memory, so as to implement the steps of the method described in the method embodiment.
Fig. 4 is a block diagram illustrating a structure of the above-described electronic device according to an exemplary embodiment. As shown in fig. 4, the electronic device 400 may include: a processor 401, a memory 402.
Wherein the processor 401 is configured to control the overall operation of the electronic device 400 to perform all or part of the steps of the discharge power correction method described above. The memory 402 is used to store various types of data to support operation at the electronic device 400, which may include, for example, instructions for any application or method operating on the electronic device 400, as well as application-related data, such as a base power meter, a modified power meter, and the like. The Memory 402 may be implemented by any type or combination of volatile or non-volatile Memory devices, such as static random access Memory (Static Random Access Memory, SRAM for short), electrically erasable programmable Read-Only Memory (Electrically Erasable Programmable Read-Only Memory, EEPROM for short), erasable programmable Read-Only Memory (Erasable Programmable Read-Only Memory, EPROM for short), programmable Read-Only Memory (Programmable Read-Only Memory, PROM for short), read-Only Memory (ROM for short), magnetic Memory, flash Memory, magnetic disk, or optical disk.
In an exemplary embodiment, the electronic device 400 may be implemented by one or more application specific integrated circuits (Application Specific Integrated Circuit, abbreviated as ASIC), digital signal processors (Digital Signal Processor, abbreviated as DSP), digital signal processing devices (Digital Signal Processing Device, abbreviated as DSPD), programmable logic devices (Programmable Logic Device, abbreviated as PLD), field programmable gate arrays (Field Programmable Gate Array, abbreviated as FPGA), controllers, microcontrollers, microprocessors, or other electronic components for performing the discharge power correction method described above.
The disclosed embodiments also provide a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method described in the method embodiments above. For example, the computer readable storage medium may be the memory 302 described above including a computer program executable by the processor 401 of the electronic device 400 to perform the discharge power correction method described above.
In another exemplary embodiment, a computer program product is also provided, which comprises a computer program executable by a programmable apparatus, the computer program having code portions for performing the above-described discharge power correction method when executed by the programmable apparatus.
The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure. For example, the BMS controller may be changed to an in-vehicle controller.
In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, the present disclosure does not further describe various possible combinations.
Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.
Claims (10)
1. A method of correcting discharge power, the method comprising:
detecting whether the vehicle is under-voltage or not in the running process according to the discharging power, wherein the discharging power is the sum of basic power and initial correction power, the basic power is determined according to the residual capacity of a battery pack obtained by the vehicle in the running process and a basic power meter, the basic power meter comprises multiple battery pack residual capacities and basic power corresponding to each battery pack residual capacity, the initial correction power is determined according to the battery pack residual capacity, the battery pack aging degree, the battery pack temperature and a correction basic power meter obtained by the vehicle in the running process, and the correction basic power meter comprises the correlation relation among multiple battery pack residual capacities, multiple battery pack aging degrees, multiple battery pack temperatures and multiple correction powers;
when the vehicle is detected to be under-voltage, under-voltage information corresponding to the current under-voltage moment is acquired, wherein the under-voltage information comprises the residual capacity of a battery pack, the aging degree of the battery pack, the temperature of the battery pack and the lowest voltage of all single battery voltages in the battery pack;
determining updated correction power according to the initial correction power, the lowest voltage of all the single battery voltages in the battery pack and the preset voltage of the single battery in the battery pack;
and replacing the correction power matched with the residual capacity of the battery pack, the aging degree of the battery pack and the temperature of the battery pack according to the updated correction power.
2. The method of claim 1, wherein the determining updated correction power comprises:
obtaining updated correction power by adopting a preset calculation formula, wherein the calculation formula is as follows:
P 2 ＝P 1 *(1-(V-V 1 )/V)；
wherein P is 2 For the updated correction power, P 1 For the initial correction power, V is the preset voltage of the single battery in the battery pack, V 1 Is the lowest voltage of all the cell voltages in the battery pack.
3. The method according to claim 1, wherein the method further comprises:
acquiring the residual capacity of a battery pack acquired in the running process of the vehicle in real time; and is combined with the other components of the water treatment device,
recording the change time of the collected residual electric quantity of the battery pack;
when the undervoltage of the vehicle is detected, acquiring undervoltage information corresponding to the current undervoltage moment comprises the following steps: acquiring at least one target parameter, wherein the target parameter comprises the accumulated discharge capacity of the battery pack in a time period from the change time to the current under-voltage time and/or a difference value between the current under-voltage time and the change time;
and under-voltage information corresponding to the current under-voltage moment is acquired under the condition that the at least one target parameter meets the corresponding preset condition.
4. A method according to claim 3, wherein the target parameter comprises the accumulated discharge capacity, and the method further comprises, correspondingly:
and when the accumulated discharge capacity is lower than the product of the rated capacity of the battery pack and the aging degree of the battery pack corresponding to the change moment, determining that the accumulated discharge capacity meets the corresponding preset condition.
5. A method according to claim 3, characterized in that the target parameter comprises the difference between the current under-voltage moment and the change moment, and in that the method further comprises, correspondingly:
and when the difference value is lower than a preset time threshold value, determining that the difference value meets a corresponding preset condition.
6. The method of claim 1, wherein detecting whether an under-voltage has occurred during operation according to discharge power comprises:
acquiring basic power and initial correction power of a vehicle at the current moment;
and taking the sum of the basic power and the initial correction power as the discharge power of the vehicle, and determining that the vehicle has undervoltage when the actual single battery voltage of the single battery in the battery pack in the running process of the vehicle according to the discharge power is smaller than the preset voltage.
7. A discharge power correction device, the device comprising:
the detection module is used for detecting whether the vehicle is under-voltage or not in the running process according to the discharging power, wherein the discharging power is the sum of basic power and initial correction power, the basic power is determined according to the residual capacity of a battery pack obtained by the vehicle in the running process and a basic power meter, the basic power meter comprises multiple battery pack residual capacities and basic power corresponding to each battery pack residual capacity, the initial correction power is determined according to the battery pack residual capacity, the battery pack aging degree, the battery pack temperature and the correction basic power meter obtained by the vehicle in the running process, and the correction basic power meter comprises the correlation relation among multiple battery pack residual capacities, multiple battery pack aging degrees, multiple battery pack temperatures and multiple correction powers;
the first acquisition module is used for acquiring undervoltage information corresponding to the current undervoltage moment when the vehicle is detected to be undervoltage, wherein the undervoltage information comprises the residual capacity of a battery pack, the aging degree of the battery pack, the temperature of the battery pack and the lowest voltage of all single battery voltages in the battery pack;
the determining module is used for determining updated correction power according to the initial correction power, the lowest voltage of all the single battery voltages in the battery pack and the preset voltage of the single battery in the battery pack;
and the correction module is used for replacing the correction power matched with the battery pack residual capacity, the battery pack aging degree and the battery pack temperature according to the updated correction power.
8. The apparatus of claim 7, wherein the apparatus further comprises:
the second acquisition module is used for acquiring the residual capacity of the battery pack acquired in the running process of the vehicle in real time; and is combined with the other components of the water treatment device,
recording the change time of the collected residual electric quantity of the battery pack;
the first acquisition module further includes:
the first acquisition submodule is used for acquiring at least one target parameter, wherein the target parameter comprises the accumulated discharge capacity of the battery pack in a time period from the change moment to the current under-voltage moment and/or a difference value between the current under-voltage moment and the change moment;
the second acquisition sub-module is used for acquiring the undervoltage information corresponding to the current undervoltage moment under the condition that the at least one target parameter meets the corresponding preset condition.
9. A computer readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements the steps of the method according to any one of claims 1-6.
10. An electronic device, comprising:
a memory having a computer program stored thereon;
a processor for executing the computer program in the memory to implement the steps of the method of any one of claims 1-6.
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| CN114252770B (en) * | 2021-11-19 | 2023-12-22 | 东软睿驰汽车技术（沈阳）有限公司 | Method, device and system for detecting power of battery pack and electronic equipment |
| CN115166542A (en) * | 2022-06-21 | 2022-10-11 | 深圳市正浩创新科技股份有限公司 | SOC calculation method, control circuit, electronic device, and storage medium |
| CN115230533A (en) * | 2022-07-25 | 2022-10-25 | 重庆长安汽车股份有限公司 | Pre-undervoltage power control strategy and pre-undervoltage power control system for power battery system |
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