CN111913111A - Discharge power correction method, discharge power correction device, storage medium and electronic equipment - Google Patents
Discharge power correction method, discharge power correction 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The present disclosure relates to a discharge power correction method, apparatus, storage medium, and electronic device, the method comprising: detecting whether the vehicle is under-voltage in the running process according to the discharge power; when the vehicle is detected to be under-voltage, acquiring under-voltage information corresponding to the current under-voltage moment; determining updated correction power according to the initial correction power, the lowest voltage of all the single batteries in the battery pack and the preset voltage of the single batteries in the battery pack; and replacing the correction power matched with the residual electric quantity of the battery pack, the aging degree of the battery pack and the temperature of the battery pack by the correction power meter according to the updated correction power. On the premise of ensuring that the discharge power can be adjusted in time, the problem that the discharge power estimation accuracy of the electric vehicle battery is reduced along with the increase of the aging degree of the battery is solved.
Description
Technical Field
The present disclosure relates to the field of power battery technologies, and in particular, to a discharge power correction method and apparatus, a storage medium, and an electronic device.
Background
Along with the gradual increase of the electric vehicle keeping quantity in the automobile market, the user experience of the electric vehicle is more and more emphasized. The method has the advantages that 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 good power experience of a user is guaranteed, so that the requirement on the discharge power estimation accuracy of the power battery system is provided.
In the related art, the discharge power is usually obtained by a table lookup method or a cell voltage closed-loop control method. However, the table lookup method for obtaining the discharge power has a problem that the estimation accuracy of the aging state of the electric vehicle cannot be guaranteed after the electric vehicle is used for a period of time, thereby causing the accuracy of estimating the discharge power using the table lookup method to decrease as the aging degree of the battery increases; the discharge power estimation accuracy of the single battery voltage closed-loop control method is high, but the problem that the discharge power is not adjusted timely due to slow response of a battery system may exist.
Disclosure of Invention
The purpose of the present disclosure is to provide an electronic device that solves the problem that the estimation accuracy of the discharge power of an electric vehicle battery decreases as the aging degree of the battery increases, while ensuring that the discharge power can be adjusted in time, by correcting the correction power in a correction power meter.
In order to achieve the above object, in a first aspect, the present disclosure provides a discharge power correction method, the method including:
detecting whether the vehicle is under-voltage 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;
when the vehicle is detected to be under-voltage, acquiring under-voltage information corresponding to the current under-voltage moment, wherein the under-voltage information comprises the residual electric quantity of a battery pack, the aging degree of the battery pack, the temperature of the battery pack and the lowest voltage of 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 batteries in the battery pack and the preset voltage of the single batteries in the battery pack;
and replacing the correction power matched with the residual electric quantity of the battery pack, the aging degree of the battery pack and the temperature of the battery pack by the correction power meter according to the updated correction power.
Optionally, the determining the updated correction power includes:
obtaining the updated correction power by adopting a preset calculation formula, wherein the calculation formula is as follows:
P2＝P1*(1-(V-V1)/V)；
wherein, P2For said updated correction power, P1For the initial correction power, V is the preset voltage of the single battery in the battery pack, V1The lowest voltage in all the single batteries in the battery pack.
Optionally, the method further comprises:
acquiring the residual electric quantity of a battery pack acquired by the vehicle in the running process in real time; and the number of the first and second electrodes,
recording the change moment of the collected residual electric quantity of the battery pack;
when detecting that the vehicle is under-voltage, acquiring the under-voltage information corresponding to the current under-voltage moment comprises: 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 the difference value between the current under-voltage moment and the change moment;
and under the condition that the at least one target parameter meets the corresponding preset condition, acquiring the undervoltage information corresponding to the current undervoltage moment.
Optionally, the target parameter includes the accumulated discharge capacity, and accordingly, 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 time and the change time, and accordingly, the method further includes:
and when the difference is lower than a preset time threshold, determining that the difference meets a corresponding preset condition.
Optionally, the detecting whether the vehicle is under-voltage during the operation according to the discharge power includes:
acquiring the basic power and the 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 is under-voltage 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 less than the preset voltage.
In a second aspect, the present disclosure also provides a discharge power correction apparatus, the apparatus including:
the detection module is used for detecting whether the vehicle is under-voltage 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 vehicle undervoltage control device comprises a first acquisition module, a second acquisition module and a control module, wherein the first acquisition module is used for acquiring undervoltage information corresponding to the current undervoltage moment when detecting that the vehicle is undervoltage, and the undervoltage information comprises the residual electric quantity of a battery pack, the aging degree of the battery pack, the temperature of the battery pack and the lowest voltage of the voltages of all single batteries 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 batteries in the battery pack and the preset voltage of the single batteries in the battery pack;
and the correction module is used for replacing the correction power matched with the residual electric quantity 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 apparatus further comprises:
the second acquisition module is used for acquiring the residual electric quantity of the battery pack acquired by the vehicle in the running process in real time; and the number of the first and second electrodes,
recording the change moment of the collected residual electric quantity of the battery pack;
the first obtaining module further comprises:
the first obtaining submodule is used for obtaining 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 the difference value between the current under-voltage moment and the change moment;
and the second obtaining submodule is used for obtaining 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 the 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.
By 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 basic power and the initial correction power; when the vehicle is detected to be under-voltage, acquiring under-voltage information corresponding to the current under-voltage moment, wherein the under-voltage information comprises the residual electric quantity of a battery pack, the aging degree of the battery pack, the temperature of the battery pack and the lowest voltage of 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 batteries in the battery pack and the preset voltage of the single batteries in the battery pack; and replacing the correction power matched with the residual electric quantity of the battery pack, the aging degree of the battery pack and the temperature of the battery pack by the correction power meter according to the updated correction power. The method has the advantages that residual electric quantity of different battery packs, aging degrees of different battery packs and discharge power under different battery pack temperatures are corrected, on the premise that discharge power can be adjusted timely, the problem that discharge power estimation accuracy of the electric vehicle battery is reduced along with increase of the aging degree of the battery is solved, the estimation accuracy of the discharge power is improved, and the electric vehicle can be rapidly determined according to basic power and correction power in a correction power meter in the actual operation process.
Additional features and advantages of the disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
fig. 1 is a schematic flow chart of a discharge power correction method provided by the present disclosure.
Fig. 2 is another schematic flow chart of a discharge power calibration method provided by the present disclosure.
Fig. 3 is a functional block diagram of a discharge power correction apparatus provided for the present disclosure.
Fig. 4 is a block diagram of an electronic device provided for the present disclosure.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
In the related art, the discharge power is estimated mainly by using a table lookup method and a single battery voltage closed-loop control method. Specifically, the table look-up method is based on SOC (state of charge), SOH (state of health), and battery temperature, and respectively looks up a table to obtain instantaneous discharge power and continuous discharge power, and performs switching calculation between the two powers according to a strategy, and the instantaneous discharge power and the continuous discharge power are used as the basic discharge power of the power battery system. However, the estimation accuracy of the table lookup method is poor, and the main disadvantages include: after the electric vehicle is used for a period of time, the estimation precision of the battery aging state of the electric vehicle cannot be guaranteed, so that the discharge power precision of table lookup estimation is reduced along with the increase of the service life of the electric vehicle, the table lookup method needs a large number of bench calibration and whole vehicle verification tests, the workload is large, in addition, the discharge power estimation error strongly depends on the calibration quality, and the error is unavoidable.
The closed-loop control method for the voltage of the single battery mainly realizes closed-loop regulation in a PID mode, although the estimation precision of the closed-loop control method for the voltage of the single battery is high, the requirements of P/I/D three control parameters on a calibration engineer are high, the calibration workload is large, and the conditions of untimely regulation and the like are easy to occur if the response speed of the 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 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 power calibration method includes steps S110 to S140. Specifically, the method comprises the following steps:
step S110: and detecting whether the vehicle is under-voltage in the running process according to the discharge power.
In this embodiment, the vehicle is an electric vehicle. The vehicle described below may be an electric vehicle.
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 are obtained through a bench test in advance, 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 in different conditions depends on the number of the iteration data, and the accuracy of the discharge power is higher when the number of the iteration data is larger and the accuracy of the initial correction power in different conditions is higher.
In the embodiment, according to different characteristics of the basic power and the initial correction power and considering implementation convenience, only the initial correction power can be corrected, and the basic power is not updated, so that the dependence of the power estimation accuracy on the basic power accuracy is reduced, the workload for obtaining the basic power and the requirement for data quality are reduced to a certain extent, and the data obtaining cost is reduced.
In some embodiments, the electronic device may obtain the base power and the initial modified power by a table lookup. For example, the electronic device may obtain the base power according to a base power table including a plurality of types of remaining battery pack amounts and a base power corresponding to each type of remaining battery pack amount. The electronic equipment acquires the residual electric quantity of the battery pack of the vehicle in the running process, and basic power corresponding to the residual electric quantity is matched in a basic power meter according to the residual electric quantity. And obtaining initial base power according to a correction power meter, wherein the correction base power meter comprises the correlation among the residual electric quantity of various battery packs, the aging degree of various battery packs, the temperature of various battery packs and various correction powers. The electronic equipment acquires the residual electric quantity of the battery pack, the aging degree of the battery pack and the temperature of the battery pack in the running process of the vehicle, matches correction power corresponding to the residual electric quantity of the battery pack, the aging degree of the battery pack and the temperature of the battery pack in a correction power meter according to the residual electric quantity of the battery pack, the aging degree of the battery pack and the temperature of the battery pack, 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 operation 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 capacity 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 batteries in the battery pack when operating according to the discharge power.
If the electronic equipment detects that the vehicle runs under-voltage according to the discharge power, for the current conditions of the residual electric quantity of the battery pack, the aging degree of the battery pack and the temperature of the battery pack, the vehicle cannot obtain better continuous power on the premise of ensuring that the service life and the safety of the single battery are not influenced, and the fact that the initial correction power needs to be corrected is indicated.
In some embodiments, whether the vehicle is under-voltage may be determined according to a mathematical relationship between an actual cell voltage of the cells in the battery pack after the vehicle is discharged according to the discharge power and a preset voltage of the cells in the battery pack. Exemplarily, the step S110 specifically includes: firstly, acquiring the basic power and the 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 is under-voltage 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 less than the preset voltage. The preset voltage may be set according to actual requirements, and this embodiment does not limit this.
Step S120: and when the vehicle is detected to be under-voltage, acquiring the under-voltage information corresponding to the current under-voltage moment.
In this embodiment, the under-voltage information includes the remaining power of the battery pack, the aging degree of the battery pack, the temperature of the battery pack, and the minimum voltage of the battery cells in the battery pack.
It should be noted that the lowest voltage of the single batteries in the battery pack is the lowest voltage of all the current single batteries discharged by the discharge power.
It can be understood that, when the vehicle is under-voltage, it indicates that the correction power corresponding to the remaining capacity of the battery pack, the aging degree of the battery pack, and the temperature of the battery pack, which are reflected at the current under-voltage time in the correction power meter, needs to be corrected.
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 by using a preset calculation formula, where the calculation formula is:
P2＝P1*(1-(V-V1)/V)；
wherein, P2For said updated correction power, P1For the initial correction power, V is the preset voltage of the single battery in the battery pack, V1The lowest voltage of the single batteries in the battery pack is obtained.
It should be noted that, in this embodiment, the occurrence of the undervoltage indicates that the estimated discharge power is larger than the actual discharge power of the single battery, 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 single battery with the largest current discharge power needs to be corrected, and the estimated discharge power of all the single batteries can be corrected to the actual discharge power. Therefore, when the updated correction power is specifically calculated, the lowest voltage of the single batteries in the battery pack is selected as the lowest single voltage of all the single batteries discharged by the discharge power. For example, taking the case that the battery pack includes a single battery 1, a single battery 2, and a single battery 3, and taking the case that the single battery 1, the single battery 2, and the single battery 3 discharged by the discharging power are 3.4 volts, 3.5 volts, and 3.6 volts, respectively, then the minimum voltage of the single battery in the battery pack is 3.4 volts.
It should be noted that the preset voltage of the single battery in the battery pack can be set according to actual requirements.
Step S140: and replacing the correction power matched with the residual electric quantity of the battery pack, the aging degree of the battery pack and the temperature of the battery pack by the correction power meter according to the updated correction power.
In this embodiment, the updated correction power is used to replace the correction power matching the correction power meter with the remaining capacity 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 meter, and solve the problem that the estimation accuracy of the discharge power of the vehicle decreases as the aging degree of the battery increases, so that the vehicle can quickly obtain the correction power with higher accuracy according to the updated correction power meter, obtain the correction power and the basic power by a table look-up method, and ensure that the discharge power can be timely adjusted in the running process of the vehicle, and further, when the vehicle uses the sum of the correction power and the basic power as the discharge power, the vehicle can achieve the purpose that a user can obtain continuous power to the maximum extent without damaging the battery.
In the embodiment, the battery management system of the electric vehicle is adopted to accurately correct the basic discharge power of the power battery, and extra hardware cost is not required to be increased.
It is understood that by repeating the above steps S110 to S140, infinite loop iteration of the corrected power table can be realized, and the accuracy of the corrected power depends on the number of iterations. The same correction operation is carried out under different battery pack residual electric quantities, battery pack aging degrees and battery temperatures of the vehicle, and the discharge power correction of the vehicle in the full working condition range is realized.
In a possible implementation manner of the embodiment of the disclosure, the electronic device may acquire the remaining electric quantity of the battery pack collected by the vehicle in the running process in real time; and recording the change moment of the collected residual electric quantity 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 moment to the current under-voltage moment, and/or the difference value between the current under-voltage moment and the change moment; and under the condition that the at least one target parameter meets the corresponding preset condition, acquiring the undervoltage information corresponding to the current undervoltage moment. That is to say, as shown in fig. 2, another discharge power correction method provided by the embodiment of the present disclosure may include:
step S210: and detecting whether the vehicle is under-voltage in the running process according to the discharge power.
Step S210 is similar to step S110 in fig. 1, and is not described here again.
Step S220: and acquiring the residual electric quantity of the battery pack collected in the running process of the vehicle in real time, and recording the change moment of the collected residual electric quantity of the battery pack.
The execution order of steps S210 and S220 is not limited, and fig. 2 shows parallel execution. Specifically, the electronic device can store the acquired remaining power of the battery pack and the acquisition time each time in the database, and can determine the change time of the remaining power of the battery pack by judging the difference value of the remaining power of the battery pack stored twice before and after.
Step S230: and acquiring at least one target parameter, and 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 some embodiments, the target parameter includes a cumulative discharge capacity of the battery pack in a time period from the change time to the current under-voltage time. When the target parameter comprises the accumulated discharge capacity, correspondingly, the corresponding preset condition comprises 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, 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, the accumulated discharge capacity is determined to meet the corresponding preset condition.
In some embodiments, the target parameter comprises a difference between the current brownout time and the change time. When the target parameter comprises the difference value, correspondingly, the corresponding preset condition comprises 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, the difference value is determined to meet 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, but this embodiment is not limited in any way. 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 is not described herein again.
Step S250: and replacing the correction power matched with the residual electric quantity of the battery pack, the aging degree of the battery pack and the temperature of the battery pack by the correction power meter according to the updated correction power.
Step S250 is similar to step S140 in fig. 1, and is not described herein again.
In this embodiment, by setting a certain preset condition, when the target parameter meets the preset condition corresponding to the setting, and after the undervoltage occurs, the correction is performed on the correction power meter, so as to avoid that the power consumption is too large due to frequent correction of the correction power meter.
Referring to fig. 3, an embodiment of the present disclosure further provides a discharge power calibration apparatus, including:
the detection module is used for detecting whether the vehicle is under-voltage 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 electric quantity of the battery pack, the aging degree of the battery pack, the temperature of the battery pack and the lowest voltage of the voltages of all the single batteries in the battery pack.
And the determining module is used for determining the updated correction power according to the initial correction power, the lowest voltage of all the single batteries in the battery pack and the preset voltage of the single batteries in the battery pack.
And the correction module is used for replacing the correction power matched with the residual electric quantity 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 detection module further includes:
and the power acquisition submodule is used for acquiring the basic power and the initial correction power of the vehicle at the current moment.
And the undervoltage detection submodule is used for determining 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 by taking the sum of the basic power and the initial correction power as the discharge power of the vehicle.
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 voltages of all the single batteries in the battery pack, and a preset voltage of the single battery in the battery pack.
Optionally, the discharge power correction apparatus further includes:
the second acquisition module is used for acquiring the residual electric quantity of the battery pack acquired by the vehicle in the running process in real time; recording the change moment of the collected residual electric quantity of the battery pack;
the first obtaining module further comprises:
the first obtaining submodule is used for obtaining 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 the difference value between the current under-voltage moment and the change moment;
and the second obtaining submodule is used for obtaining 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, under the condition 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 under the condition that the target parameter comprises the accumulated discharge capacity, 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, and under the condition that 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. And under the condition that the target parameter comprises the difference value, the second judgment 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 a corresponding preset condition under the condition that whether the difference value is lower than the preset time threshold value or not.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
An embodiment of the present disclosure further 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 steps of the method described in the above method embodiments.
Fig. 4 is a block diagram illustrating a structure of the electronic device according to an exemplary embodiment. As shown in fig. 4, the electronic device 400 may include: a processor 401 and a memory 402.
The processor 401 is configured to control the overall operation of the electronic device 400, so as to complete all or part of the steps in the discharge power correction method. The memory 402 is used to store various types of data to support operations at the electronic device 400, such as instructions for any application or method operating on the electronic device 400, as well as application-related data, such as base power meters, modified power meters, and the like. The Memory 402 may be implemented by any type of volatile or non-volatile Memory device or combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), 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 (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components for performing the above-described discharge power correction method.
The embodiments of the present disclosure also provide a computer-readable storage medium, on which a computer program is stored, which when executed by a processor implements the steps of the method described in the above method embodiments. 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-mentioned discharge power correction method when executed by the programmable apparatus.
The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure. For example, the BMS controller may be changed to an on-board controller.
It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.
Claims (10)
1. A discharge power correction method, characterized in that the method comprises:
detecting whether the vehicle is under-voltage 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;
when the vehicle is detected to be under-voltage, acquiring under-voltage information corresponding to the current under-voltage moment, wherein the under-voltage information comprises the residual electric quantity of a battery pack, the aging degree of the battery pack, the temperature of the battery pack and the lowest voltage of 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 batteries in the battery pack and the preset voltage of the single batteries in the battery pack;
and replacing the correction power matched with the residual electric quantity of the battery pack, the aging degree of the battery pack and the temperature of the battery pack by the correction power meter according to the updated correction power.
2. The method of claim 1, wherein determining the updated modified power comprises:
obtaining the updated correction power by adopting a preset calculation formula, wherein the calculation formula is as follows:
P2＝P1*(1-(V-V1)/V)；
wherein, P2For said updated correction power, P1For the initial correction power, V is the preset voltage of the single battery in the battery pack, V1The lowest voltage in all the single batteries in the battery pack.
3. The method of claim 1, further comprising:
acquiring the residual electric quantity of a battery pack acquired by the vehicle in the running process in real time; and the number of the first and second electrodes,
recording the change moment of the collected residual electric quantity of the battery pack;
when detecting that the vehicle is under-voltage, acquiring the under-voltage information corresponding to the current under-voltage moment comprises: 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 the difference value between the current under-voltage moment and the change moment;
and under the condition that the at least one target parameter meets the corresponding preset condition, acquiring the undervoltage information corresponding to the current undervoltage moment.
4. The method of claim 3, wherein the target parameter comprises the cumulative discharge capacity, and wherein the method further comprises:
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. The method of claim 3, wherein the target parameter comprises a difference between the current brown-out time and the change time, and wherein the method further comprises:
and when the difference is lower than a preset time threshold, determining that the difference meets a corresponding preset condition.
6. The method of claim 1, wherein said detecting whether the vehicle is under-voltage during operation from the discharge power comprises:
acquiring the basic power and the 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 is under-voltage 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 less than the preset voltage.
7. A discharge power correction apparatus, characterized in that the apparatus comprises:
the detection module is used for detecting whether the vehicle is under-voltage 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 vehicle undervoltage control device comprises a first acquisition module, a second acquisition module and a control module, wherein the first acquisition module is used for acquiring undervoltage information corresponding to the current undervoltage moment when detecting that the vehicle is undervoltage, and the undervoltage information comprises the residual electric quantity of a battery pack, the aging degree of the battery pack, the temperature of the battery pack and the lowest voltage of the voltages of all single batteries 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 batteries in the battery pack and the preset voltage of the single batteries in the battery pack;
and the correction module is used for replacing the correction power matched with the residual electric quantity of the battery pack, the aging degree of the battery pack and the temperature of the battery pack according to the updated correction power.
8. The apparatus of claim 7, further comprising:
the second acquisition module is used for acquiring the residual electric quantity of the battery pack acquired by the vehicle in the running process in real time; and the number of the first and second electrodes,
recording the change moment of the collected residual electric quantity of the battery pack;
the first obtaining module further comprises:
the first obtaining submodule is used for obtaining 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 the difference value between the current under-voltage moment and the change moment;
and the second obtaining submodule is used for obtaining 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 which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 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 carry out the steps of the method of any one of claims 1 to 6.
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