CN113572243B - Battery power control method, control device and battery system - Google Patents

Battery power control method, control device and battery system Download PDF

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Publication number
CN113572243B
CN113572243B CN202111125887.3A CN202111125887A CN113572243B CN 113572243 B CN113572243 B CN 113572243B CN 202111125887 A CN202111125887 A CN 202111125887A CN 113572243 B CN113572243 B CN 113572243B
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discharge
current
maximum
power
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CN113572243A (en
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侯航
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Svolt Energy Technology Co Ltd
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Svolt Energy Technology Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H01M10/443—Methods for charging or discharging in response to temperature
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00306—Overdischarge protection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/007188—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters
    • H02J7/007192—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature
    • H02J7/007194—Regulation of charging or discharging current or voltage the charge cycle being controlled or terminated in response to non-electric parameters in response to temperature of the battery
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Secondary Cells (AREA)

Abstract

The application provides a control method, a control device and a battery system of battery power, which relate to the technical field of batteries, and the method comprises the following steps: under the condition that the target battery is discharged, acquiring a plurality of historical discharge currents, the current target battery temperature and the current state of charge of the target battery in real time, wherein the plurality of historical discharge currents are a plurality of discharge currents of the target battery in a historical time period; determining the maximum discharge current according to the current target battery temperature and the current state of charge; adjusting the maximum discharge current according to the plurality of historical discharge currents, so that the duration of pulse discharge current of the target battery in the discharge process is less than a preset value; calculating the product of the adjusted maximum discharge current and the current discharge voltage to obtain the maximum discharge power; the discharge power of the control target battery is smaller than the maximum discharge power. The method solves the problem that the power control method of the battery in the prior art has the risk of damaging the battery due to the fact that the power capacity of the battery exceeds.

Description

Battery power control method, control device and battery system
Technical Field
The present disclosure relates to the field of battery technologies, and in particular, to a battery power control method, a control device, a computer-readable storage medium, a processor, and a battery system.
Background
The power battery pack is used as a key component of a power assembly of the electric automobile and the hybrid electric automobile, is a main energy storage unit of the electric automobile and provides energy for the running of the whole automobile. When the vehicle is accelerated, the battery pack is generally required to perform short-time high-rate short-time discharge, and when the vehicle runs in a constant vehicle speed range, the battery pack is required to perform long-time discharge with a lower rate. In the two running states of the automobile, the short-time high-rate discharge of the battery pack during acceleration can be called pulse discharge, and the time is usually less than or equal to 60 s. The battery pack used when the vehicle runs at a constant speed discharges at a low rate and can become a continuous discharge, and the time can be generally understood to be more than or equal to 30 s.
Due to the characteristics of the battery cell in the vehicle power battery pack, the power performance of the battery cell is greatly influenced by the temperature and the state of charge (SOC), and the power performance of the power battery pack is reduced along with the reduction of the temperature and the state of charge (SOC). The power discharge time of the battery pack is usually fixed, a two-dimensional table of pulse discharge and a two-dimensional table of continuous discharge can be formed according to the temperature and the SOC state, and the two-dimensional tables are written into a software program of the battery management system. The temperature inside the battery pack can be measured by a temperature sensor arranged inside the battery pack, and the SOC of the battery pack can be estimated by battery management system software. According to the measured temperature and the estimated SOC, the pulse power and the peak power can be inquired from the two-dimensional tables in real time.
When each manufacturer carries out working condition control at present, the lowest voltage of the battery core in the battery pack is used for controlling. When the method is used for controlling the power, only a two-dimensional table of the pulse power is usually arranged in the battery management system software, the pulse power in the two-dimensional table is inquired in real time, and the pulse power is reduced in a certain proportion when the set cell voltage is triggered by combining the cell working voltage of the cell. This control mode has certain drawback, for example, when power battery package is in higher SOC state, reach the pulse duration after, the voltage of electric core probably still is higher, can have the high rate of short time to discharge the possibility this moment, surpasss the ability use of electric core in the power battery package promptly, causes the damage to the battery, and can't obtain effectual control and avoid.
The above information disclosed in this background section is only for enhancement of understanding of the background of the technology described herein and, therefore, certain information may be included in the background that does not form the prior art that is already known in this country to a person of ordinary skill in the art.
Disclosure of Invention
The present application mainly aims to provide a battery power control method, a control device, a computer-readable storage medium, a processor, and a battery system, so as to solve the problem that the battery power control method in the prior art has a risk of damaging a battery beyond the power capability of the battery itself.
According to an aspect of an embodiment of the present invention, there is provided a method for controlling battery power, including: under the condition that a target battery is discharged, acquiring a plurality of historical discharge currents, the current temperature of the target battery and the current state of charge of the target battery in real time, wherein the plurality of historical discharge currents are a plurality of discharge currents of the target battery in a historical time period, the historical time period is a preset time period which is in the current discharging process of the target battery and is before the current time, and the time interval between the starting time of the preset time period and the current time is a preset interval; determining a maximum discharge current according to the current target battery temperature and the current state of charge, wherein the maximum discharge current at least comprises a maximum pulse discharge current; adjusting the maximum discharge current according to a plurality of historical discharge currents, so that the duration of pulse discharge current of the target battery in the discharge process is smaller than a preset value; calculating the product of the adjusted maximum discharge current and the current discharge voltage to obtain the maximum discharge power; and controlling the discharge power of the target battery to be smaller than the maximum discharge power.
Optionally, the maximum discharge current includes a maximum pulse discharge current and a maximum sustained discharge current, and the maximum discharge current is adjusted according to the plurality of historical discharge currents so that the duration of the pulse discharge current of the target battery is less than a predetermined value, including: calculating a first effective value and a second effective value of the target battery according to the plurality of historical discharge currents, wherein the first effective value is an effective value of the pulse discharge current, and the second effective value is an effective value of the continuous discharge current; reducing the maximum pulsed discharge current and the maximum sustained discharge current if the first effective value is greater than the maximum pulsed discharge current and/or the second effective value is greater than the maximum sustained discharge current.
Optionally, calculating the first effective value and the second effective value according to a plurality of historical discharge currents includes: calculating a root mean square of a plurality of first historical discharge currents to obtain a first effective value, wherein the first historical discharge currents are the historical discharge currents in a first historical time period, and the duration of the first historical time period is less than or equal to a first preset value; calculating the root mean square of a plurality of second historical discharge currents to obtain the second effective value, wherein the second historical discharge currents are the historical discharge currents in a second historical time period, and the duration of the second historical time period is greater than or equal to a second preset value.
Optionally, the maximum discharge power includes a maximum pulse power and a maximum sustained power, and calculating a product of the adjusted maximum discharge current and a current discharge voltage to obtain the maximum discharge power, including: calculating the product of the reduced maximum pulse discharge current and the current discharge voltage to obtain the maximum pulse power; and calculating the product of the reduced maximum continuous discharge current and the current discharge voltage to obtain the maximum continuous power.
Optionally, controlling the discharge power of the target battery according to the maximum discharge power includes: controlling the discharge power of the target battery to be less than or equal to the maximum pulse power under the condition that the discharge multiplying power of the target battery is greater than a preset multiplying power; and controlling the discharge power of the target battery to be less than or equal to the maximum continuous power when the discharge multiplying power is less than or equal to the preset multiplying power.
Optionally, the reduced maximum pulsed discharge current is greater than the maximum sustained discharge current.
Optionally, the duration of the first historical time period is between 10s and 60s, and the duration of the second historical time period is between 30s and 600 s.
According to another aspect of the embodiments of the present invention, there is also provided a control apparatus of battery power, including: the device comprises an acquisition unit, a storage unit and a control unit, wherein the acquisition unit is used for acquiring a plurality of historical discharge currents, a current target battery temperature and a current state of charge of a target battery in real time under the condition that the target battery is discharged, the plurality of historical discharge currents are a plurality of discharge currents of the target battery in a historical time period, the historical time period is a preset time period which is in the current discharging process of the target battery and is before the current time, and the time interval between the starting time of the preset time period and the current time is a preset interval; a determining unit, configured to determine a maximum discharge current according to the current target battery temperature and the current state of charge, where the maximum discharge current at least includes a maximum pulse discharge current; the adjusting unit is used for adjusting the maximum discharging current according to a plurality of historical discharging currents, so that the duration of pulse discharging current of the target battery in the discharging process is smaller than a preset value; the calculation unit is used for calculating the product of the adjusted maximum discharge current and the current discharge voltage to obtain the maximum discharge power; and the control unit is used for controlling the discharge power of the target battery to be smaller than the maximum discharge power.
According to still another aspect of embodiments of the present invention, there is also provided a computer-readable storage medium including a stored program, wherein the program executes any one of the methods.
According to still another aspect of the embodiments of the present invention, there is further provided a processor, configured to execute a program, where the program executes any one of the methods.
According to another aspect of the embodiments of the present invention, there is also provided a battery system, including a battery and a control device of battery power, the control device of battery power is used for executing any one of the methods.
In an embodiment of the present invention, in the method for controlling battery power, first, when the target battery is discharged, a plurality of historical discharge currents, a current target battery temperature, and a current state of charge of the target battery are obtained in real time, where the plurality of historical discharge currents are a plurality of discharge currents of the target battery within a historical time period, the historical time period is a predetermined time period in a current discharge process of the target battery and before a current time, and a time interval between a start time of the predetermined time period and the current time is a predetermined interval; then, determining a maximum discharge current according to the current target battery temperature and the current state of charge, wherein the maximum discharge current at least comprises a maximum pulse discharge current; then, adjusting the maximum discharge current according to a plurality of historical discharge currents, so that the duration of pulse discharge current of the target battery in the discharge process is smaller than a preset value; then, calculating the product of the adjusted maximum discharge current and the current discharge voltage to obtain the maximum discharge power; and finally, controlling the discharge power of the target battery to be smaller than the maximum discharge power. The control method obtains a plurality of historical discharge currents in a preset interval before the current moment in real time, and adjusts the current maximum discharge current in real time through the plurality of historical discharge currents, so that the maximum discharge power of a target battery is adjusted in real time, the discharge power of the target battery is controlled to be smaller than the maximum discharge power of the target battery, the duration time of pulse discharge current of the target battery is made to be smaller than a preset value, and the target battery is prevented from being pulsed and discharged for a long time, so that the target battery is prevented from being damaged due to exceeding the discharge capacity of the target battery, the service life of the target battery is prolonged, and the problem that the power control method of the battery in the prior art has the risk of damaging the battery is solved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:
FIG. 1 shows a flow diagram of a method of controlling battery power according to an embodiment of the present application;
fig. 2 shows a schematic diagram of a control arrangement of battery power according to an embodiment of the present application.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. Also, in the specification and claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element or "connected" to the other element through a third element.
As mentioned in the background of the invention, in order to solve the above problem, a power control method of a battery in the prior art has a risk of damaging the battery beyond the power capability of the battery itself, and in an exemplary embodiment of the present application, a control method of the battery power, a control device, a computer readable storage medium, a processor and a battery system are provided.
According to an embodiment of the present application, a method of controlling battery power is provided.
Fig. 1 is a flowchart of a control method of battery power according to an embodiment of the present application. As shown in fig. 1, the method comprises the steps of:
step S101, under the condition that a target battery is discharged, acquiring a plurality of historical discharge currents, a current target battery temperature and a current state of charge of the target battery in real time, wherein the plurality of historical discharge currents are a plurality of discharge currents of the target battery in a historical time period, the historical time period is a preset time period which is in the current discharging process of the target battery and is before the current time, and the time interval between the starting time of the preset time period and the current time is a preset interval;
step S102, determining a maximum discharge current according to the current target battery temperature and the current state of charge, wherein the maximum discharge current at least comprises a maximum pulse discharge current;
step S103, adjusting the maximum discharge current according to a plurality of historical discharge currents, so that the duration of pulse discharge current of the target battery in the discharge process is less than a preset value;
step S104, calculating the product of the adjusted maximum discharge current and the current discharge voltage to obtain the maximum discharge power;
step S105, controlling the discharge power of the target battery to be smaller than the maximum discharge power.
In the method for controlling battery power, first, when the target battery is discharged, a plurality of historical discharge currents, a current target battery temperature and a current state of charge of the target battery are obtained in real time, the plurality of historical discharge currents are a plurality of discharge currents of the target battery within a historical time period, the historical time period is a preset time period in a current discharging process of the target battery and before a current time, and a time interval between a starting time of the preset time period and the current time is a preset interval; then, determining a maximum discharge current according to the current target battery temperature and the current state of charge, wherein the maximum discharge current at least comprises a maximum pulse discharge current; then, adjusting the maximum discharge current according to a plurality of historical discharge currents, so that the duration of pulse discharge current of the target battery in the discharge process is smaller than a preset value; then, calculating the product of the adjusted maximum discharge current and the current discharge voltage to obtain the maximum discharge power; and finally, controlling the discharge power of the target battery to be smaller than the maximum discharge power. The control method obtains a plurality of historical discharge currents in a preset interval before the current moment in real time, and adjusts the current maximum discharge current in real time through the plurality of historical discharge currents, so that the maximum discharge power of a target battery is adjusted in real time, the discharge power of the target battery is controlled to be smaller than the maximum discharge power of the target battery, the duration time of pulse discharge current of the target battery is made to be smaller than a preset value, and the target battery is prevented from being pulsed and discharged for a long time, so that the target battery is prevented from being damaged due to the fact that the discharge capacity of the target battery is exceeded, the service life of the target battery is prolonged, and the problem that the power control method of the battery in the prior art has the risk of damaging the battery due to the fact that the power capacity of the battery is exceeded is solved.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.
In an embodiment of the present application, the maximum discharge current includes a maximum pulse discharge current IpeakAnd maximum sustained discharge current IcontinueAdjusting the maximum discharge current according to a plurality of the historical discharge currents so that the duration of the pulse discharge current of the target battery is less than a predetermined value includes: calculating a first effective value and a second effective value of the target battery according to a plurality of historical discharge currents, wherein the first effective value is an effective value of the pulse discharge current, and the second effective value is an effective value of the continuous discharge current; and reducing the maximum pulse discharge current and the maximum sustain discharge current when the first effective value is greater than the maximum pulse discharge current and/or the second effective value is greater than the maximum sustain discharge current. Specifically, an effective value I of a pulse discharge current is calculated from a plurality of historical discharge currentsrms_peakAnd effective value of the sustain discharge current Irms_continueAnd comparing with the corresponding maximum discharge current if the effective value I of the pulse discharge currentrms_peakGreater than the maximum pulse discharge current IpeakAnd/or a continuous discharge current Irms_continueIs greater than the maximum sustain discharge current IcontinueI.e. in Irms_peak＞Ipeak、Irms_continue＞IcontinueAnd Irms_peak＞IpeakAnd Irms_continue＞IcontinueIndicates the current situationIn the pulse discharge state in a predetermined interval before the moment, the maximum pulse discharge current and the maximum continuous discharge current need to be reduced to limit the current discharge power and avoid long-time pulse discharge of the target battery.
It should be noted that the maximum discharge current includes a maximum pulse discharge current and a maximum sustained discharge current, and the maximum pulse discharge current I corresponding to the current target battery temperature and the current state of charge can be obtained by querying according to a two-dimensional table of pulse discharge currents provided by a manufacturerpeakAccording to a two-dimensional table of continuous discharge current provided by a manufacturer, the current target battery temperature and the maximum continuous discharge current I corresponding to the current charge state can be inquired and obtainedcontinue。
In one embodiment of the present application, calculating a first effective value and a second effective value from a plurality of historical discharge currents includes: calculating a root mean square of a plurality of first historical discharge currents to obtain the first effective value, wherein the first historical discharge currents are the historical discharge currents in a first historical time period, and the duration of the first historical time period is less than or equal to a first preset value; calculating the root mean square of a plurality of second historical discharge currents to obtain the second effective value, wherein the second historical discharge currents are the historical discharge currents in a second historical time period, and the duration of the second historical time period is greater than or equal to a second preset value. Specifically, the first predetermined value and the second predetermined value may be set according to actual conditions, for example, the first predetermined value is 60s, the second predetermined value is 30s, and the duration t of the first history time period is1Less than or equal to 60s, the duration t of the second historical time period2≧ 30s, e.g., the duration t of the aforementioned first historical period of time110s, the duration t of the second history time period2When the time is 60s, the preset interval is more than or equal to 60s, when the target battery is discharged, the discharge current is recorded, the common sampling time interval is less than or equal to 100ms, the historical discharge current is collected in the preset interval before the current moment, namely, a plurality of first historical discharge currents and a plurality of second historical discharge currents are obtained, and the root mean square of the plurality of first historical discharge currents is calculatedCalculating a root mean square of a plurality of second historical discharge currents to the first effective value to obtain the second effective value.
In an embodiment of the present application, the maximum discharging power includes a maximum pulse power and a maximum sustained power, and the calculating a product of the adjusted maximum discharging current and a current discharging voltage to obtain the maximum discharging power includes: calculating the product of the reduced maximum pulse discharge current and the current discharge voltage to obtain the maximum pulse power; and calculating the product of the reduced maximum continuous discharge current and the current discharge voltage to obtain the maximum continuous power. Specifically, the maximum pulse power and the maximum sustain power may be reduced by reducing the maximum pulse discharge current and the maximum sustain discharge current, where the maximum pulse power is the maximum discharge power of the current pulse discharge, and the maximum sustain power is the maximum discharge power of the current sustain discharge, so as to limit the target battery to be in the pulse discharge state or the sustain discharge state to be less than the corresponding maximum discharge power.
In an embodiment of the present application, the controlling the discharge power of the target battery according to the maximum discharge power includes: controlling the discharge power of the target battery to be less than or equal to the maximum pulse power when the discharge rate of the target battery is greater than a predetermined rate; and controlling the discharge power of the target battery to be less than or equal to the maximum continuous power when the discharge rate is less than or equal to the predetermined rate. Specifically, when the discharge rate of the target battery is greater than a predetermined rate, that is, the target battery is in a pulse discharge state, the discharge power of the target battery is controlled to be less than or equal to the maximum pulse power, and when the discharge rate is less than or equal to the predetermined rate, that is, the target battery is in a sustained discharge state, the discharge power of the target battery is controlled to be less than or equal to the maximum sustained power.
It should be noted that the discharging of the target battery is controlled by sending the signals of the maximum continuous power and the maximum pulse power to the vehicle controllerThe power is less than or equal to the maximum pulse power or the discharge power of the target battery is controlled to be less than or equal to the maximum continuous power, the maximum continuous power and the maximum pulse power can be updated in real time or updated once at preset time intervals, and after a period of time, the maximum continuous power and the maximum pulse power are updated at Irms_peak≤IpeakAnd Irms_continue≤IcontinueIn the case of (1), the maximum pulse discharge current I can no longer be reducedpeakAnd maximum sustained discharge current IcontinueThe signal values of the maximum continuous power and the maximum pulse power may also be restored.
In an embodiment of the present application, the reduced maximum pulse discharge current is greater than the maximum sustain discharge current. Specifically, the reduced maximum pulse discharge current is larger than the maximum continuous discharge current, so as to avoid that the reduced maximum pulse discharge current is too small, so that the current is too small to meet the requirement when the target battery needs pulse discharge, and ensure the use experience.
In an embodiment of the application, the duration of the first historical period is between 10s and 60s, and the duration of the second historical period is between 30s and 600 s. Specifically, the duration of the first historical time period and the duration of the second historical time period are set within the above ranges, so that the pulse discharge time can be ensured to meet the requirement without damaging the battery, and certainly, the duration of the first historical time period and the duration of the second historical time period are not limited thereto, and can be adjusted by a person skilled in the art according to actual conditions.
The embodiment of the present application further provides a control device of battery power, and it should be noted that the control device of battery power of the embodiment of the present application may be used to execute the control method for battery power provided in the embodiment of the present application. The following describes a control device for battery power according to an embodiment of the present application.
Fig. 2 is a schematic diagram of a control apparatus of battery power according to an embodiment of the present application. As shown in fig. 2, the apparatus includes:
an obtaining unit 10, configured to obtain, in real time, a plurality of historical discharge currents, a current target battery temperature, and a current state of charge of a target battery when the target battery is discharged, where the plurality of historical discharge currents are a plurality of discharge currents of the target battery within a historical time period, the historical time period is a predetermined time period in a current discharging process of the target battery and before a current time, and a time interval between a start time of the predetermined time period and the current time is a predetermined interval;
a determining unit 20, configured to determine a maximum discharge current according to the current target battery temperature and the current state of charge, where the maximum discharge current at least includes a maximum pulse discharge current;
an adjusting unit 30, configured to adjust the maximum discharging current according to a plurality of historical discharging currents, so that a duration of a pulse discharging current of the target battery in a discharging process is smaller than a predetermined value;
a calculating unit 40, configured to calculate a product of the adjusted maximum discharging current and the current discharging voltage to obtain a maximum discharging power;
and a control unit 50 for controlling the discharge power of the target battery to be smaller than the maximum discharge power.
In the battery power control device, the obtaining unit obtains a plurality of historical discharge currents, a current target battery temperature and a current state of charge of the target battery in real time when the target battery is discharged, the plurality of historical discharge currents are a plurality of discharge currents of the target battery in a historical time period, the historical time period is a preset time period in the current discharging process of the target battery and before the current time, and the time interval between the starting time of the preset time period and the current time is a preset interval; a determining unit determines a maximum discharge current according to the current target battery temperature and the current state of charge, wherein the maximum discharge current at least comprises a maximum pulse discharge current; the adjusting unit adjusts the maximum discharge current according to a plurality of historical discharge currents, so that the duration of pulse discharge current of the target battery in the discharge process is smaller than a preset value; the calculation unit calculates the product of the adjusted maximum discharge current and the current discharge voltage to obtain the maximum discharge power; the control unit controls the discharge power of the target battery to be smaller than the maximum discharge power. The control device acquires a plurality of historical discharge currents in a preset interval before the current moment in real time, and adjusts the current maximum discharge current in real time through the plurality of historical discharge currents, so that the maximum discharge power of the target battery is adjusted in real time, the discharge power of the target battery is controlled to be smaller than the maximum discharge power of the target battery, the duration time of pulse discharge current of the target battery is made to be smaller than a preset value, pulse discharge of the target battery for a long time is avoided, damage to the target battery due to the fact that the discharge capacity of the target battery is exceeded is prevented, the service life of the target battery is prolonged, and the problem that the power control method of the battery in the prior art has the risk that the battery is damaged due to the fact that the power capacity of the battery is exceeded is solved.
In an embodiment of the present application, the maximum discharge current includes a maximum pulse discharge current IpeakAnd maximum sustained discharge current IcontinueThe adjustment unit includes a first calculation module and a processing module, wherein the first calculation module is configured to calculate a first effective value and a second effective value of the target battery based on a plurality of historical discharge currents, the first effective value is an effective value of the pulse discharge current, and the second effective value is an effective value of the continuous discharge current; the processing module is configured to reduce the maximum pulse discharge current and the maximum sustain discharge current when the first effective value is greater than the maximum pulse discharge current and/or the second effective value is greater than the maximum sustain discharge current. Specifically, an effective value I of a pulse discharge current is calculated from a plurality of historical discharge currentsrms_peakAnd effective value of the sustain discharge current Irms_continueAnd comparing with the corresponding maximum discharge current if the pulse discharge current is effectiveValue Irms_peakGreater than the maximum pulse discharge current IpeakAnd/or a continuous discharge current Irms_continueIs greater than the maximum sustain discharge current IcontinueI.e. in Irms_peak＞Ipeak、Irms_continue＞IcontinueAnd Irms_peak＞IpeakAnd Irms_continue＞IcontinueIndicating that the target battery is in a pulse discharge state within a predetermined interval before the current time, the maximum pulse discharge current and the maximum continuous discharge current need to be reduced to limit the current discharge power and avoid long-time pulse discharge of the target battery.
It should be noted that the maximum discharge current includes a maximum pulse discharge current and a maximum sustained discharge current, and the maximum pulse discharge current I corresponding to the current target battery temperature and the current state of charge can be obtained by querying according to a two-dimensional table of pulse discharge currents provided by a manufacturerpeakAccording to a two-dimensional table of continuous discharge current provided by a manufacturer, the current target battery temperature and the maximum continuous discharge current I corresponding to the current charge state can be inquired and obtainedcontinue。
In an embodiment of the present application, the first calculating module includes a first calculating submodule and a second calculating submodule, where the first calculating submodule is configured to calculate a root mean square of a plurality of first historical discharge currents to obtain the first effective value, the first historical discharge current is the historical discharge current in a first historical time period, and a duration of the first historical time period is less than or equal to a first predetermined value; the second calculation submodule is configured to calculate a root mean square of a plurality of second historical discharge currents to obtain the second effective value, where the second historical discharge current is the historical discharge current in a second historical time period, and a duration of the second historical time period is greater than or equal to a second predetermined value. Specifically, the first predetermined value and the second predetermined value may be set according to actual conditions, for example, the first predetermined value is 60s, the second predetermined value is 30s, and the duration t of the first history time period is1Less than or equal to 60s, the second mentionedDuration t of historical time period2≧ 30s, e.g., the duration t of the aforementioned first historical period of time110s, the duration t of the second history time period2And if the time is 60s, the preset interval is more than or equal to 60s, when the target battery is discharged, the discharge current is recorded, the sampling time interval is usually less than or equal to 100ms, historical discharge currents are collected in the preset interval before the current moment, namely a plurality of first historical discharge currents and a plurality of second historical discharge currents, the root mean square of the plurality of first historical discharge currents is calculated to obtain the first effective value, and the root mean square of the plurality of second historical discharge currents is calculated to obtain the second effective value.
In an embodiment of the present application, the maximum discharging power includes a maximum pulse power and a maximum sustained power, and the calculating unit includes a second calculating module and a third calculating module, where the second calculating module is configured to calculate a product of the reduced maximum pulse discharging current and the current discharging voltage to obtain the maximum pulse power; the third calculating module is configured to calculate a product of the reduced maximum sustained discharge current and the current discharge voltage to obtain the maximum sustained power. Specifically, the maximum pulse power and the maximum sustain power may be reduced by reducing the maximum pulse discharge current and the maximum sustain discharge current, where the maximum pulse power is the maximum discharge power of the current pulse discharge, and the maximum sustain power is the maximum discharge power of the current sustain discharge, so as to limit the target battery to be in the pulse discharge state or the sustain discharge state to be less than the corresponding maximum discharge power.
In an embodiment of the present application, the control unit includes a first control module and a second control module, where the first control module is configured to control the discharge power of the target battery to be less than or equal to the maximum pulse power when the discharge rate of the target battery is greater than a predetermined rate; the second control module is configured to control the discharge power of the target battery to be less than or equal to the maximum continuous power when the discharge rate is less than or equal to the predetermined rate. Specifically, when the discharge rate of the target battery is greater than a predetermined rate, that is, the target battery is in a pulse discharge state, the discharge power of the target battery is controlled to be less than or equal to the maximum pulse power, and when the discharge rate is less than or equal to the predetermined rate, that is, the target battery is in a sustained discharge state, the discharge power of the target battery is controlled to be less than or equal to the maximum sustained power.
It should be noted that, by sending the signals of the maximum continuous power and the maximum pulse power to the vehicle control unit, the discharge power of the target battery is controlled to be less than or equal to the maximum pulse power or the discharge power of the target battery is controlled to be less than or equal to the maximum continuous power, the maximum continuous power and the maximum pulse power may be updated in real time or may be updated at predetermined time intervals, and after a period of time, after I is reachedrms_peak≤IpeakAnd Irms_continue≤IcontinueIn the case of (1), the maximum pulse discharge current I can no longer be reducedpeakAnd maximum sustained discharge current IcontinueThe signal values of the maximum continuous power and the maximum pulse power may also be restored.
In an embodiment of the present application, the reduced maximum pulse discharge current is greater than the maximum sustain discharge current. Specifically, the reduced maximum pulse discharge current is larger than the maximum continuous discharge current, so as to avoid that the reduced maximum pulse discharge current is too small, so that the current is too small to meet the requirement when the target battery needs pulse discharge, and ensure the use experience.
In an embodiment of the application, the duration of the first historical period is between 10s and 60s, and the duration of the second historical period is between 30s and 600 s. Specifically, the duration of the first historical time period and the duration of the second historical time period are set within the above ranges, so that the pulse discharge time can be ensured to meet the requirement without damaging the battery, and certainly, the duration of the first historical time period and the duration of the second historical time period are not limited thereto, and can be adjusted by a person skilled in the art according to actual conditions.
The embodiment of the present application further provides a battery system, which includes a battery and a battery power control device, where the battery power control device is configured to execute any one of the above methods.
The battery system comprises a target battery and a battery power control device, wherein an acquisition unit acquires a plurality of historical discharge currents, a current target battery temperature and a current state of charge of the target battery in real time when the target battery is discharged, the plurality of historical discharge currents are a plurality of discharge currents of the target battery in a historical time period, the historical time period is a preset time period in the current discharge process of the target battery and before the current time, and the time interval between the starting time of the preset time period and the current time is a preset interval; a determining unit determines a maximum discharge current according to the current target battery temperature and the current state of charge, wherein the maximum discharge current at least comprises a maximum pulse discharge current; the adjusting unit adjusts the maximum discharge current according to a plurality of historical discharge currents, so that the duration of pulse discharge current of the target battery in the discharge process is smaller than a preset value; the calculation unit calculates the product of the adjusted maximum discharge current and the current discharge voltage to obtain the maximum discharge power; the control unit controls the discharge power of the target battery to be smaller than the maximum discharge power. The battery system acquires a plurality of historical discharge currents in a preset interval before the current moment in real time, and adjusts the current maximum discharge current in real time through the plurality of historical discharge currents, so that the maximum discharge power of a target battery is adjusted in real time, the discharge power of the target battery is controlled to be smaller than the maximum discharge power of the target battery, the duration time of pulse discharge current of the target battery is made to be smaller than a preset value, and the target battery is prevented from being pulsed and discharged for a long time, so that the target battery is prevented from being damaged due to exceeding of the discharge capacity of the target battery, the service life of the target battery is prolonged, and the problem that the power control method of the battery in the prior art has the risk of damaging the battery due to exceeding of the power capacity of the battery is solved.
The control device of the battery power comprises a processor and a memory, wherein the acquisition unit, the determination unit, the adjustment unit, the calculation unit, the control unit and the like are stored in the memory as program units, and the processor executes the program units stored in the memory to realize corresponding functions.
The processor comprises a kernel, and the kernel calls the corresponding program unit from the memory. The kernel can be set to be one or more than one, and the problem that the power control method of the target battery in the prior art has the risk of damaging the target battery is solved by adjusting kernel parameters.
The memory may include volatile memory in a computer readable medium, Random Access Memory (RAM) and/or nonvolatile memory such as Read Only Memory (ROM) or flash memory (flash RAM), and the memory includes at least one memory chip.
An embodiment of the present invention provides a computer-readable storage medium on which a program is stored, which when executed by a processor implements the above-described method.
The embodiment of the invention provides a processor, which is used for running a program, wherein the method is executed when the program runs.
The embodiment of the invention provides equipment, which comprises a processor, a memory and a program which is stored on the memory and can run on the processor, wherein when the processor executes the program, at least the following steps are realized:
step S101, under the condition that a target battery is discharged, acquiring a plurality of historical discharge currents, a current target battery temperature and a current state of charge of the target battery in real time, wherein the plurality of historical discharge currents are a plurality of discharge currents of the target battery in a historical time period, the historical time period is a preset time period which is in the current discharging process of the target battery and is before the current time, and the time interval between the starting time of the preset time period and the current time is a preset interval;
step S102, determining a maximum discharge current according to the current target battery temperature and the current state of charge, wherein the maximum discharge current at least comprises a maximum pulse discharge current;
step S103, adjusting the maximum discharge current according to a plurality of historical discharge currents, so that the duration of pulse discharge current of the target battery in the discharge process is less than a preset value;
step S104, calculating the product of the adjusted maximum discharge current and the current discharge voltage to obtain the maximum discharge power;
step S105, controlling the discharge power of the target battery to be smaller than the maximum discharge power.
The device herein may be a server, a PC, a PAD, a mobile phone, etc.
The present application further provides a computer program product adapted to perform a program of initializing at least the following method steps when executed on a data processing device:
step S101, under the condition that a target battery is discharged, acquiring a plurality of historical discharge currents, a current target battery temperature and a current state of charge of the target battery in real time, wherein the plurality of historical discharge currents are a plurality of discharge currents of the target battery in a historical time period, the historical time period is a preset time period which is in the current discharging process of the target battery and is before the current time, and the time interval between the starting time of the preset time period and the current time is a preset interval;
step S102, determining a maximum discharge current according to the current target battery temperature and the current state of charge, wherein the maximum discharge current at least comprises a maximum pulse discharge current;
step S103, adjusting the maximum discharge current according to a plurality of historical discharge currents, so that the duration of pulse discharge current of the target battery in the discharge process is less than a preset value;
step S104, calculating the product of the adjusted maximum discharge current and the current discharge voltage to obtain the maximum discharge power;
step S105, controlling the discharge power of the target battery to be smaller than the maximum discharge power.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the above-described division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit may be stored in a computer-readable storage medium if it is implemented in the form of a software functional unit and sold or used as a separate product. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a computer-readable storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned computer-readable storage media comprise: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
From the above description, it can be seen that the above-described embodiments of the present application achieve the following technical effects:
1) the method for controlling the battery power comprises the steps of firstly, under the condition that a target battery is discharged, obtaining a plurality of historical discharge currents, the current target battery temperature and the current state of charge of the target battery in real time, wherein the plurality of historical discharge currents are the plurality of discharge currents of the target battery in one historical time period, the historical time period is one preset time period which is in the current discharging process of the target battery and is before the current time, and the time interval between the starting time of the preset time period and the current time is a preset interval; then, determining a maximum discharge current according to the current target battery temperature and the current state of charge, wherein the maximum discharge current at least comprises a maximum pulse discharge current; then, adjusting the maximum discharge current according to a plurality of historical discharge currents, so that the duration of pulse discharge current of the target battery in the discharge process is smaller than a preset value; then, calculating the product of the adjusted maximum discharge current and the current discharge voltage to obtain the maximum discharge power; and finally, controlling the discharge power of the target battery to be smaller than the maximum discharge power. The control method obtains a plurality of historical discharge currents in a preset interval before the current moment in real time, and adjusts the current maximum discharge current in real time through the plurality of historical discharge currents, so that the maximum discharge power of a target battery is adjusted in real time, the discharge power of the target battery is controlled to be smaller than the maximum discharge power of the target battery, the duration time of pulse discharge current of the target battery is made to be smaller than a preset value, and the target battery is prevented from being pulsed and discharged for a long time, so that the target battery is prevented from being damaged due to the fact that the discharge capacity of the target battery is exceeded, the service life of the target battery is prolonged, and the problem that the power control method of the battery in the prior art has the risk of damaging the battery due to the fact that the power capacity of the battery is exceeded is solved.
2) In the battery power control device of the present application, the obtaining unit obtains, in real time, a plurality of historical discharge currents of the target battery, a current target battery temperature, and a current state of charge of the target battery when the target battery is discharged, the plurality of historical discharge currents being a plurality of discharge currents of the target battery within one historical time period, the historical time period being a predetermined time period in a current discharge process of the target battery and before a current time, and a time interval between a start time of the predetermined time period and the current time being a predetermined interval; a determining unit determines a maximum discharge current according to the current target battery temperature and the current state of charge, wherein the maximum discharge current at least comprises a maximum pulse discharge current; the adjusting unit adjusts the maximum discharge current according to a plurality of historical discharge currents, so that the duration of pulse discharge current of the target battery in the discharge process is smaller than a preset value; the calculation unit calculates the product of the adjusted maximum discharge current and the current discharge voltage to obtain the maximum discharge power; the control unit controls the discharge power of the target battery to be smaller than the maximum discharge power. The control device acquires a plurality of historical discharge currents in a preset interval before the current moment in real time, and adjusts the current maximum discharge current in real time through the plurality of historical discharge currents, so that the maximum discharge power of the target battery is adjusted in real time, the discharge power of the target battery is controlled to be smaller than the maximum discharge power of the target battery, the duration time of pulse discharge current of the target battery is made to be smaller than a preset value, pulse discharge of the target battery for a long time is avoided, damage to the target battery due to the fact that the discharge capacity of the target battery is exceeded is prevented, the service life of the target battery is prolonged, and the problem that the power control method of the battery in the prior art has the risk that the battery is damaged due to the fact that the power capacity of the battery is exceeded is solved.
3) The battery system comprises a target battery and a battery power control device, wherein an acquisition unit acquires a plurality of historical discharge currents, a current target battery temperature and a current state of charge of the target battery in real time under the condition that the target battery is discharged, the plurality of historical discharge currents are a plurality of discharge currents of the target battery in a historical time period, the historical time period is a preset time period which is in the current discharge process of the target battery and is before the current time, and the time interval between the starting time of the preset time period and the current time is a preset interval; a determining unit determines a maximum discharge current according to the current target battery temperature and the current state of charge, wherein the maximum discharge current at least comprises a maximum pulse discharge current; the adjusting unit adjusts the maximum discharge current according to a plurality of historical discharge currents, so that the duration of pulse discharge current of the target battery in the discharge process is smaller than a preset value; the calculation unit calculates the product of the adjusted maximum discharge current and the current discharge voltage to obtain the maximum discharge power; the control unit controls the discharge power of the target battery to be smaller than the maximum discharge power. The battery system acquires a plurality of historical discharge currents in a preset interval before the current moment in real time, and adjusts the current maximum discharge current in real time through the plurality of historical discharge currents, so that the maximum discharge power of a target battery is adjusted in real time, the discharge power of the target battery is controlled to be smaller than the maximum discharge power of the target battery, the duration time of pulse discharge current of the target battery is made to be smaller than a preset value, and the target battery is prevented from being pulsed and discharged for a long time, so that the target battery is prevented from being damaged due to exceeding of the discharge capacity of the target battery, the service life of the target battery is prolonged, and the problem that the power control method of the battery in the prior art has the risk of damaging the battery due to exceeding of the power capacity of the battery is solved.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (11)

1. A method for controlling battery power, comprising:
under the condition that a target battery is discharged, acquiring a plurality of historical discharge currents, the current temperature of the target battery and the current state of charge of the target battery in real time, wherein the plurality of historical discharge currents are a plurality of discharge currents of the target battery in a historical time period, the historical time period is a preset time period which is in the current discharging process of the target battery and is before the current time, and the time interval between the starting time of the preset time period and the current time is a preset interval;
determining a maximum discharge current according to the current target battery temperature and the current state of charge, wherein the maximum discharge current at least comprises a maximum pulse discharge current;
adjusting the maximum discharge current according to a plurality of historical discharge currents, so that the duration of pulse discharge current of the target battery in the discharge process is smaller than a preset value;
calculating the product of the adjusted maximum discharge current and the current discharge voltage to obtain the maximum discharge power;
and controlling the discharge power of the target battery to be smaller than the maximum discharge power.
2. The method of claim 1, wherein the maximum discharge current further comprises a maximum sustained discharge current, and wherein adjusting the maximum discharge current based on a plurality of the historical discharge currents such that a duration of a pulsed discharge current of the target battery is less than a predetermined value comprises:
calculating a first effective value and a second effective value of the target battery according to the plurality of historical discharge currents, wherein the first effective value is an effective value of the pulse discharge current, and the second effective value is an effective value of the continuous discharge current;
reducing the maximum pulsed discharge current and the maximum sustained discharge current if the first effective value is greater than the maximum pulsed discharge current and/or the second effective value is greater than the maximum sustained discharge current.
3. The method of claim 2, wherein calculating the first and second effective values from the plurality of historical discharge currents comprises:
calculating a root mean square of a plurality of first historical discharge currents to obtain a first effective value, wherein the first historical discharge currents are the historical discharge currents in a first historical time period, and the duration of the first historical time period is less than or equal to a first preset value;
calculating the root mean square of a plurality of second historical discharge currents to obtain the second effective value, wherein the second historical discharge currents are the historical discharge currents in a second historical time period, and the duration of the second historical time period is greater than or equal to a second preset value.
4. The method of claim 2, wherein the maximum discharge power comprises a maximum pulse power and a maximum sustain power, and wherein calculating the product of the adjusted maximum discharge current and the present discharge voltage to obtain the maximum discharge power comprises:
calculating the product of the reduced maximum pulse discharge current and the current discharge voltage to obtain the maximum pulse power;
and calculating the product of the reduced maximum continuous discharge current and the current discharge voltage to obtain the maximum continuous power.
5. The method of claim 4, wherein controlling the discharge power of the target battery according to the maximum discharge power comprises:
controlling the discharge power of the target battery to be less than or equal to the maximum pulse power under the condition that the discharge multiplying power of the target battery is greater than a preset multiplying power;
and controlling the discharge power of the target battery to be less than or equal to the maximum continuous power when the discharge multiplying power is less than or equal to the preset multiplying power.
6. The method of claim 2, wherein the maximum pulsed discharge current after the reduction is greater than the maximum sustained discharge current.
7. The method of claim 3, wherein the first historical period of time is between 10s and 60s long and the second historical period of time is between 30s and 600s long.
8. A battery power control apparatus, comprising:
the device comprises an acquisition unit, a storage unit and a control unit, wherein the acquisition unit is used for acquiring a plurality of historical discharge currents, a current target battery temperature and a current state of charge of a target battery in real time under the condition that the target battery is discharged, the plurality of historical discharge currents are a plurality of discharge currents of the target battery in a historical time period, the historical time period is a preset time period which is in the current discharging process of the target battery and is before the current time, and the time interval between the starting time of the preset time period and the current time is a preset interval;
a determining unit, configured to determine a maximum discharge current according to the current target battery temperature and the current state of charge, where the maximum discharge current at least includes a maximum pulse discharge current;
the adjusting unit is used for adjusting the maximum discharging current according to a plurality of historical discharging currents, so that the duration of pulse discharging current of the target battery in the discharging process is smaller than a preset value;
the calculation unit is used for calculating the product of the adjusted maximum discharge current and the current discharge voltage to obtain the maximum discharge power;
and the control unit is used for controlling the discharge power of the target battery to be smaller than the maximum discharge power.
9. A computer-readable storage medium, characterized in that the computer-readable storage medium comprises a stored program, wherein the program performs the method of any one of claims 1 to 7.
10. A processor, characterized in that the processor is configured to run a program, wherein the program when running performs the method of any of claims 1 to 7.
11. A battery system comprising a battery and means for controlling battery power for performing the method of any one of claims 1 to 7.
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