CN116885320A

CN116885320A - Battery power output method, device, equipment, medium and product

Info

Publication number: CN116885320A
Application number: CN202311156423.8A
Authority: CN
Inventors: 吴凯; 古力
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2023-09-08
Filing date: 2023-09-08
Publication date: 2023-10-13
Anticipated expiration: 2043-09-08
Also published as: CN116885320B

Abstract

The application discloses a power output method, a device, equipment, a medium and a product of a battery, wherein the method comprises the following steps: acquiring a first state parameter, first power and a target corresponding relation of a target battery, wherein the target corresponding relation is a corresponding relation among a preset state parameter, a preset continuous discharge duration and maximum discharge power of the target battery; under the condition that the first state parameter is a target state parameter, determining a target maximum discharge power corresponding to a target continuous discharge time length of the target battery under the first state parameter based on a target corresponding relation, wherein the target state parameter is higher than a calibration state parameter corresponding to the target battery when a discharge power sudden drop phenomenon occurs, and the preset continuous discharge time length comprises the target continuous discharge time length; determining target discharge power according to the target maximum discharge power and the first power; the target battery is controlled to discharge at the target discharge power. In this way, the target battery can be made to output power more smoothly.

Description

Battery power output method, device, equipment, medium and product

Technical Field

The present application relates to the field of battery technologies, and in particular, to a method, an apparatus, a device, a medium, and a product for outputting power of a battery.

Background

As consumer demands for energy density and cycle performance of batteries continue to increase, single cathode materials have failed to meet current demands. Thus, mixing of two or more positive electrode materials is started.

However, the use of two or more positive electrode materials may cause a sudden drop in the instantaneous output power of the battery, resulting in a decrease in the reliability of the battery.

Therefore, a method capable of smoothly outputting power from the battery is required.

Disclosure of Invention

The application provides a power output method, device, equipment, medium and product of a battery, which can enable a target battery to output power more stably.

In a first aspect, the present application provides a power output method of a battery, including: acquiring a first state parameter, first power and a target corresponding relation of a target battery, wherein the target corresponding relation is a corresponding relation among a preset state parameter, a preset continuous discharge duration and maximum discharge power of the target battery; under the condition that the first state parameter is a target state parameter, determining a target maximum discharge power corresponding to a target continuous discharge time length of the target battery under the first state parameter based on a target corresponding relation, wherein the target state parameter is higher than a calibration state parameter corresponding to the target battery when a discharge power sudden drop phenomenon occurs, the discharge power sudden drop phenomenon is a phenomenon that the discharge power drops in a preset time length to exceed a preset value, and the preset continuous discharge time length comprises the target continuous discharge time length; determining target discharge power according to the target maximum discharge power and the first power; the target battery is controlled to discharge at the target discharge power.

Therefore, the target state parameter is higher than the corresponding calibration state parameter when the discharge power of the target battery suddenly drops, and the target maximum discharge power of the target battery is determined based on the corresponding relation among the preset state parameter, the preset continuous discharge duration and the maximum discharge power of the target battery before the discharge power of the target battery suddenly drops, and the target discharge power is determined according to the target maximum discharge power and the first power of the target battery, so that the target battery is controlled to discharge with the target discharge power, and the target battery outputs power more stably.

In some embodiments, obtaining the target correspondence of the target battery includes: for each preset duration of the multiple preset durations, respectively executing the following steps to obtain target corresponding relations respectively corresponding to the multiple preset durations: acquiring electrical parameters of a target battery in a target process, wherein the target process is a process of discharging from a plurality of preset state parameters to the preset state parameters respectively in a preset continuous discharge time length; determining maximum discharge power corresponding to the preset state parameters according to the electric parameters corresponding to the preset state parameters; fitting a plurality of preset state parameters and the maximum discharge power corresponding to the preset state parameters respectively to obtain a target corresponding relation corresponding to the preset continuous discharge duration.

Therefore, by acquiring the electrical parameters of the target battery in the process of discharging from a plurality of preset state parameters to the state parameter threshold value respectively in the preset continuous discharge time length and calculating the maximum discharge power, the more accurate maximum discharge power can be obtained, and the fitting obtained target corresponding relation is smoother and more accurate.

In some embodiments, the fitting the plurality of preset state parameters and the maximum discharge powers corresponding to the preset state parameters respectively to obtain the target corresponding relationship corresponding to the preset duration of discharge includes: fitting a plurality of preset state parameters and maximum discharge power corresponding to the preset state parameters respectively through a plurality of fitting modes to obtain a plurality of corresponding relations corresponding to preset continuous discharge duration; searching for a corresponding relation meeting a preset condition from the corresponding relations to obtain a target corresponding relation corresponding to the preset duration, wherein the preset condition is determined based on energy and maximum discharge power in the corresponding relations corresponding to the preset duration.

In this way, a plurality of corresponding relations corresponding to the preset continuous discharge duration are obtained by fitting the plurality of maximum discharge powers under each preset continuous discharge duration respectively through a plurality of fitting modes, and then the corresponding relation meeting the preset condition is determined from the corresponding relations to serve as the target corresponding relation corresponding to the preset continuous discharge duration, so that the target corresponding relation with better smoothness can be obtained.

In some embodiments, the preset conditions include: the total energy after fitting corresponding to the preset continuous discharge time length in the target corresponding relation is not more than the total energy before fitting, the difference value between the total energy before fitting and the total energy after fitting is smaller than a first threshold value, the total energy after fitting comprises the sum of a plurality of first energies corresponding to the preset continuous discharge time length after fitting, the total energy before fitting comprises the sum of a plurality of second energies corresponding to the preset continuous discharge time length before fitting, the plurality of first energies are products of a plurality of maximum discharge powers corresponding to the preset continuous discharge time length after fitting and the preset continuous discharge time length respectively, and the plurality of second energies are products of a plurality of maximum discharge powers corresponding to the preset continuous discharge time length before fitting and the preset continuous discharge time length respectively; the average value of the maximum discharge power respectively corresponding to the preset continuous discharge time length under a plurality of preset state parameters in the target corresponding relation is larger than a second threshold value; and the range of the maximum discharge power respectively corresponding to the preset continuous discharge time length under a plurality of preset state parameters in the target corresponding relation is smaller than a third threshold value.

Therefore, the optimal corresponding relation meeting the user requirement in the corresponding relations can be obtained by setting the preset conditions to screen the corresponding relations, and the smoothness of the maximum discharge power in the target corresponding relation can be further improved.

In some embodiments, the target maximum discharge power corresponding to the target duration includes a first maximum discharge power corresponding to a first duration, the first duration including a duration greater than a fourth threshold among a plurality of preset durations; the determining the target discharge power according to the target maximum discharge power and the first power includes: in the case that the first power is not greater than the first maximum discharge power, the first power is determined as the target discharge power.

Therefore, through the process, when the power output by the target battery is not larger than the maximum discharge power corresponding to the longer preset continuous discharge duration in the current state of the target battery, the output power of the target battery can meet the requirement and cannot generate the power sudden drop phenomenon, the power output of the target battery is optimized, and therefore the use experience of a user can be improved.

In some embodiments, the target maximum discharge power corresponding to the target duration includes a second maximum discharge power corresponding to a second duration, where the second duration includes a duration less than a fifth threshold among a plurality of preset durations; after determining whether the first power is greater than the first maximum discharge power, the method further includes: judging whether the first power is larger than the second maximum discharge power or not under the condition that the first power is larger than the first maximum discharge power; in the case that the first power is not greater than the second maximum discharge power, the first power is determined as the target discharge power.

Therefore, through the process, when the power output by the target battery is not larger than the maximum discharge power corresponding to the short preset continuous discharge duration in the current state of the target battery, the target battery can meet the power requirement of a load on the premise that the power sudden drop phenomenon does not occur, so that the target battery can meet the power requirement of the load in a longer time, and the use experience of a user is improved.

In some embodiments, after determining whether the first power is greater than the second maximum discharge power, the method further includes: and determining the second maximum discharge power as a target discharge power in the case that the first power is greater than the second maximum discharge power.

In this way, by determining that the target discharge power is the second maximum discharge power when the first power is greater than the second maximum discharge power, the output power of the target battery can be actively reduced to the second maximum discharge power when the target battery cannot support continuous output as required, and the power dip phenomenon of the target battery which occurs when the target battery outputs as required can be improved because the second maximum discharge power is determined based on the fitted target correspondence.

In some embodiments, after the controlling the target battery to discharge at the target discharge power, the method further includes: acquiring a first duration of continuous discharge of a target battery at a second maximum discharge power; judging whether the second continuous discharge duration is greater than a sixth threshold value under the condition that the first duration is greater than the second continuous discharge duration; and under the condition that the second continuous discharge duration is not greater than the sixth threshold, controlling the target battery to discharge at a third maximum discharge power, wherein the third maximum discharge power comprises the maximum discharge power corresponding to the third continuous discharge duration, and the third continuous discharge duration comprises a continuous discharge duration which is longer than the second continuous discharge duration and has a difference value smaller than the seventh threshold from among a plurality of preset continuous discharge durations.

In this way, when the duration of the target battery continuously discharging with the second maximum discharge power exceeds the second continuous discharge duration and the second continuous discharge duration is not longer than the longer continuous discharge duration of the plurality of preset continuous discharge durations, the target battery is controlled to discharge with the third maximum discharge power corresponding to the longer third preset continuous discharge duration, and when the power output is stopped, the output power can be actively reduced again, and the power dump phenomenon can be continuously improved, so that the power dump phenomenon can be continuously improved in the discharging process of the target battery.

In some embodiments, after the control-target battery discharges at the third maximum discharge power, the method further includes: updating the second maximum discharge power to the third maximum discharge power, and returning to the first duration for which the acquisition target battery continues to discharge at the second maximum discharge power.

Thus, through the process, whether the duration of continuous discharge of the target battery with a certain maximum discharge power exceeds the preset continuous discharge duration corresponding to the maximum discharge power in the target corresponding relation can be circularly detected, and when the duration exceeds, the output power is reduced again, so that the power sudden drop phenomenon is continuously improved, and the improvement effect on the power sudden drop phenomenon is maintained.

In a second aspect, the present application provides a power output apparatus of a battery, comprising: the acquisition module is used for acquiring a first state parameter, first power and target corresponding relation of the target battery, wherein the target corresponding relation is a corresponding relation among a preset state parameter, a preset continuous discharge duration and a calibrated maximum discharge power of the target battery; the first determining module is used for determining target maximum discharge power corresponding to target continuous discharge duration of the target battery under the first state parameter based on the target corresponding relation under the condition that the first state parameter is the target state parameter, wherein the target state parameter is higher than a calibration state parameter corresponding to the target battery when a discharge power sudden drop phenomenon occurs, the discharge power sudden drop phenomenon is a phenomenon that the discharge power drops in a preset duration and exceeds a preset value, and the preset continuous discharge duration comprises the target continuous discharge duration; the second determining module is used for determining target discharge power according to the target maximum discharge power and the first power; and the control module is used for controlling the target battery to discharge at the target discharge power.

Therefore, the target state parameter is higher than the corresponding calibration state parameter when the discharge power of the target battery suddenly drops, and the target maximum discharge power of the target battery is determined based on the corresponding relation among the preset state parameter, the preset continuous discharge duration and the calibration maximum discharge power of the target battery before the discharge power of the target battery suddenly drops, and the target discharge power is determined according to the target maximum discharge power and the first power of the target battery, so that the target battery is controlled to discharge with the target discharge power, and the target battery outputs power more stably.

In a third aspect, the present application provides an electronic device, the device comprising: a processor and a memory storing computer program instructions;

the processor, when executing the computer program instructions, implements a method of power output of a battery as shown in any of the embodiments of the first aspect.

In a fourth aspect, the present application provides a computer storage medium having stored thereon computer program instructions which, when executed by a processor, implement a method of power output of a battery as shown in any one of the embodiments of the first aspect.

In a fifth aspect, embodiments of the present application provide a computer program product, instructions in which, when executed by a processor of an electronic device, cause the electronic device to perform the method of power output of a battery as shown in any of the embodiments of the first aspect.

The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application more readily apparent.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the accompanying drawings. In the drawings:

fig. 1 is a schematic flow chart of a method for outputting power of a battery according to some embodiments of the present application;

FIG. 2 is a second flowchart of a method for outputting power of a battery according to some embodiments of the present application;

Fig. 3 is a schematic structural diagram of a power output apparatus of a battery according to some embodiments of the present application;

fig. 4 is a schematic structural diagram of an electronic device according to some embodiments of the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

At present, common battery anode materials include lithium cobaltate, ternary materials, lithium iron phosphate or lithium manganate and the like. The lithium cobaltate has the advantages of high voltage platform, high volume energy density, good power and the like, but has higher price and lower reliability; the ternary material has the advantages of high energy density, stable structure and the like, but has poor reliability; the lithium iron phosphate has the advantages of low cost, long cycle life, high reliability and the like, but has poor conductivity, low energy density and poor low-temperature performance; the lithium manganate has the advantages of low cost, high reliability, high voltage platform and the like, but has lower energy density and serious manganese dissolution at high temperature.

However, as the energy density and cycle performance of the battery are continuously improved by users, a single positive electrode material has failed to meet the current demands. Therefore, two or more positive electrode materials are mixed or a phosphate positive electrode material LiMPO is used ₄ (at least two of m= Fe, mn, co, ni) as a positive electrode material of the battery. One of the characteristics of the two positive electrode materials is that two or more voltage platforms exist in the charge-discharge voltage curve. There is a voltage step phenomenon at the interface between two adjacent platforms, which can cause the instantaneous output power of the battery to drop, resulting in reduced reliability of the battery. When the battery is used as a power battery of a vehicle, the acceleration capability of the vehicle can be suddenly reduced, and certain potential safety hazards can be caused under certain working conditions (such as acceleration overtaking).

In view of the above technical problems, in the embodiment of the present application, since the target state parameter is higher than the calibration state parameter corresponding to the occurrence of the discharge power dip phenomenon of the target battery, before the occurrence of the discharge power dip phenomenon of the target battery, the target maximum discharge power of the target battery is determined based on the corresponding relationship between the preset state parameter, the preset duration of discharge and the maximum discharge power of the target battery, and the target discharge power is determined according to the target maximum discharge power and the first power of the target battery, so that the target battery is controlled to discharge with the target discharge power, and the target battery outputs power more stably.

First, a power output method of a battery according to an embodiment of the present application will be described in detail with reference to fig. 1.

Fig. 1 is a schematic flow chart of a power output method of a battery according to an embodiment of the present application, and it should be noted that the power output method of a battery may be applied to a power output device of a battery.

As shown in fig. 1, the power output method of the battery may include the steps of:

s110, acquiring a first state parameter, a first power and a target corresponding relation of a target battery;

s120, under the condition that the first state parameter is the target state parameter, determining the target maximum discharge power corresponding to the target continuous discharge duration of the target battery under the first state parameter based on the target corresponding relation;

s130, determining target discharge power according to the target maximum discharge power and the first power;

and S140, controlling the target battery to discharge at the target discharge power.

Referring to S110, the target battery may be a lithium ion battery. The positive electrode material of the target battery may comprise a mixture of two or more positive electrode materials or a phosphate-based positive electrode material LiMPO ₄ (at least two of m= Fe, mn, co, ni). The charge and discharge voltage curves of the target battery can have two or more voltage platforms, and a voltage step phenomenon can exist in the junction area of two adjacent platforms, and the voltage step in the junction area can cause the phenomenon of sudden drop of output power of the target battery.

The first state parameter may be a current state parameter of the target battery. The first state parameter may include a first state of charge and may also include a first temperature. The first state of charge may be a current state of charge of the target battery. The first temperature may be a current temperature of the target battery. The first power may be a discharge power that currently requires the target battery output.

The target correspondence may be a correspondence between a preset state parameter, a preset duration of discharge, and a maximum discharge power of the target battery. The preset state parameter may include a preset state of charge and may also include a preset temperature. Illustratively, the target correspondence may be in the form of an object (Map) table or Map that maps keys to values.

The preset state of charge may include a full state of charge of the target battery, such as: 0% -100%, and may also include the common state of charge of the target battery, such as: 30% -90%.

The current state of charge of the battery cells in the target battery may be obtained by a battery management system (Battery Management System, BMS), which may estimate the current state of charge of the target battery, i.e., the first state of charge, by an open-circuit voltage method or an ampere-hour integration method, for example.

For example, at least one temperature sensor may be disposed on each surface of the battery cell, and the current temperature of the surface of the battery cell may be collected by the temperature sensor, and then an average value of the current temperatures of the plurality of battery cells in the target battery may be calculated as the current temperature, i.e., the first temperature, of the target battery. Therefore, the problem of inaccurate temperature acquisition caused by local temperature difference of the battery cells in the discharging process can be solved, and the accuracy of the first temperature can be improved.

In some embodiments, to obtain a more accurate target correspondence, obtaining the target correspondence of the target battery may include:

for each preset duration of the multiple preset durations, respectively executing the following steps to obtain target corresponding relations respectively corresponding to the multiple preset durations:

Acquiring an electrical parameter of a target battery in a target process;

determining maximum discharge power corresponding to the preset state parameters according to the electric parameters corresponding to the preset state parameters;

fitting a plurality of preset state parameters and the maximum discharge power corresponding to the preset state parameters respectively to obtain a target corresponding relation corresponding to the preset continuous discharge duration.

Here, the target process may be a process of discharging from a plurality of preset state parameters to a state parameter threshold value, respectively, in a preset duration of discharge.

The state parameter threshold may be a state of charge threshold, which may be set manually based on actual demand, and may be, for example, 0%.

The electrical parameters may include a discharge current of the target battery, a discharge start voltage before discharge, a discharge end voltage after discharge, and an average voltage during discharge.

Specifically, when the target battery is in a preset state of charge and is kept standing for a preset period of time, the target battery is controlled to be at a preset temperature, then the target battery is controlled to discharge to a state of charge threshold value in a preset continuous discharge period of time at the preset temperature, in the process that the target battery is discharged from the preset state of charge to the state of charge threshold value, the discharge current of the target battery, the discharge starting voltage before discharge, the discharge ending voltage after discharge and the average voltage in the discharge process are obtained, and then the corresponding maximum discharge power of the target battery under the preset temperature, the preset state of charge and the preset continuous discharge period of time is calculated according to the discharge current, the discharge starting voltage, the discharge ending voltage, the average voltage and the lower limit of the calibrated discharge voltage of the target battery.

The preset time period may be at least longer than a time period required for the target battery to reach a stable voltage from stopping discharging. The preset duration may be, for example, 1 hour.

The preset state of charge may be set manually based on actual requirements, and may be any state of charge in the full state of charge of the target battery, or may be any state of charge in the common state of charge of the target battery. Illustratively, the preset state of charge may be any of 1%, 2%, …, 100%.

The preset temperature may be set manually based on actual requirements. Illustratively, the preset temperature may be any one of-20 ℃, 10 ℃, 0 ℃, 25 ℃, 45 ℃.

The preset duration of the discharge may be set manually based on actual requirements. The preset duration may be, for example, any one of 5s, 10s, 15s, 20s, 30s, 60s, 90 s.

The discharge current may be a discharge current during which the target battery is discharged from the preset state of charge to the state of charge threshold, based on which the target battery may be discharged from the preset state of charge to the state of charge threshold for a preset duration of discharge. For example, the target battery may be controlled to discharge at a constant current of 4C or a calibrated maximum dischargeable current of the target battery, and if the target battery cannot be discharged from the preset state of charge to the state of charge threshold for the preset duration of discharge, the discharge current may be adjusted until the target battery can be discharged from the preset state of charge to the state of charge threshold for the preset duration of discharge, and the discharge current is determined.

In the case where the target battery is in a low state of charge, the target battery may be discharged to a nominal discharge voltage lower limit of the target battery.

The average voltage can be obtained by collecting a plurality of voltages in the process that the target battery is discharged from a preset state of charge to a state of charge threshold value and integrating the plurality of voltages, and the average value of the discharge starting voltage and the discharge ending voltage can also be used as the average voltage.

The maximum discharge power may be calculated by a preset formula, which may be, for example, as follows:

wherein,,at the temperature of the preset temperature, the temperature of the alloy is equal to the preset temperature,SOC is a preset state of charge, +.>In order to preset the duration of the continuous discharge,for the maximum discharge power of the target battery corresponding to the preset temperature, the preset charge state and the preset continuous discharge duration, +.>For the discharge start voltage, ">For the end of discharge voltage, +.>In order to calibrate the lower discharge voltage limit,for average voltage +.>Is the discharge current.

In one example, the target battery may be placed in an incubator at 25 ℃, the state of charge of the target battery is adjusted to 30%, i.e., a preset state of charge, and the target battery is left standing for 1 hour. And then the temperature of the incubator is regulated to 10 ℃, namely the preset temperature, and the target battery is controlled to discharge at 4C constant current, so that the target battery is discharged to 0% of the state of charge, namely the state of charge threshold value, when the target battery is discharged for 10s, namely the preset continuous discharge duration. Collecting the discharge starting voltage of the target battery when the target battery starts to discharge, collecting the discharge ending voltage of the target battery when the target battery ends to discharge, calculating the average voltage of the target battery in the discharging process, and then calculating the corresponding maximum discharge power of the target battery at the temperature of 10 ℃ under the state of charge of 30% and the continuous discharging time of 10s based on the 4C constant current, the discharge starting voltage, the discharge ending voltage, the average voltage and the lower limit of the calibrated discharge voltage of the target battery through the preset formula.

For example, the maximum discharge power at a plurality of preset states of charge (30%, 40%, 45%, 50%, 55%, 60%, 70%, 80%, 90%) and a plurality of preset sustained discharge durations (10 s, 20s, 60 s) when the target battery is at 25 ℃ may be as shown in table 1.

TABLE 1 maximum discharge Power Meter

Since the discharge voltage curve of the target battery may have two or more voltage platforms, a voltage step phenomenon may occur at the junction region of two adjacent platforms, and thus the power of the target battery may be suddenly reduced during the discharge process.

Here, fitting can be performed for a plurality of preset state parameters under each preset duration and the corresponding maximum discharge power respectively, and smoothing of the maximum discharge power can be realized by improving power mutation through fitting.

In the fitted target corresponding relation, the corresponding maximum discharge power of the target battery is smoother under the conditions of a plurality of preset temperatures, a plurality of preset charge states and a plurality of preset continuous discharge durations.

Illustratively, the target correspondence obtained by fitting the data in table 1 may be as shown in table 2.

TABLE 2 target correspondence table

In some embodiments, in order to obtain a target corresponding relationship with better smoothness, fitting the plurality of preset state parameters and the maximum discharge powers corresponding to the preset state parameters respectively to obtain a target corresponding relationship corresponding to the preset duration of discharge may include:

fitting a plurality of preset state parameters and maximum discharge power corresponding to the preset state parameters respectively through a plurality of fitting modes to obtain a plurality of corresponding relations corresponding to preset continuous discharge duration;

searching for a corresponding relation meeting a preset condition from the corresponding relations to obtain a target corresponding relation corresponding to the preset duration of discharge.

Here, the plurality of fitting means may include, but is not limited to, at least two of linear fitting, polynomial fitting, logarithmic fitting, exponential fitting.

The preset condition may be determined based on the energy and the maximum discharge power in a plurality of correspondence relationships corresponding to the preset duration of discharge.

Each corresponding relation corresponding to a certain preset duration includes the maximum discharge power corresponding to a plurality of preset state parameters under the preset duration.

In some embodiments, in order to further improve the smoothness of the maximum discharge power in the target correspondence, the preset condition may include:

the total energy after fitting corresponding to the preset continuous discharge time length in the target corresponding relation is not more than the total energy before fitting, the difference value between the total energy before fitting and the total energy after fitting is less than a first threshold value, the total energy after fitting comprises the sum of a plurality of first energies corresponding to the preset continuous discharge time length after fitting, the total energy before fitting comprises the sum of a plurality of second energies corresponding to the preset continuous discharge time length before fitting, the plurality of first energies can be products of a plurality of maximum discharge powers corresponding to the preset continuous discharge time length after fitting and the preset continuous discharge time length respectively, and the plurality of second energies can be products of a plurality of maximum discharge powers corresponding to the preset continuous discharge time length before fitting and the preset continuous discharge time length respectively;

the average value of the maximum discharge power respectively corresponding to the preset continuous discharge time length under a plurality of preset state parameters in the target corresponding relation is larger than a second threshold value;

and the range of the maximum discharge power respectively corresponding to the preset continuous discharge time length under a plurality of preset state parameters in the target corresponding relation is smaller than a third threshold value.

The first threshold, the second threshold and the third threshold can be set according to actual requirements.

Specifically, the total energy after fitting corresponding to the preset duration of discharge in the target corresponding relationship is not greater than the total energy before fitting, and the difference between the total energy before fitting and the total energy after fitting is the smallest in a plurality of corresponding relationships corresponding to the preset duration of discharge;

the average value of the maximum discharge power corresponding to the preset continuous discharge time length under a plurality of preset state parameters is preset in the target corresponding relation, and the average value is the maximum in a plurality of corresponding relations corresponding to the preset continuous discharge time length;

the maximum power of the maximum discharge corresponding to the preset duration in the target corresponding relation under the preset state parameters is the minimum in the corresponding relations corresponding to the preset duration.

The step S120 is related to the fact that the target state parameter may be higher than the calibration state parameter corresponding to the target battery when the discharge power suddenly drops, and the discharge power suddenly drops may be a phenomenon that the discharge power drops beyond a preset value within a preset duration.

The target state of charge parameter may include a target state of charge that may be higher than a corresponding nominal state of charge when a sudden drop in output power of the target battery occurs. In this way, when the first state of charge is the target state of charge, that is, the target battery is in the target state of charge, the process of determining the output power of the battery is executed, and the output power of the battery can be adjusted in advance, so that the possibility of the output power sudden drop of the target battery is reduced.

The preset duration of the discharge sustaining may include a target duration of the discharge sustaining.

For example, the target maximum discharge power corresponding to the target duration may be found from the target correspondence relationship under the first state parameter.

Therefore, based on the target corresponding relation, the target maximum discharge power corresponding to the target continuous discharge duration of the target battery under the first state parameter can be simply and rapidly determined, and accordingly the output power of the target battery can be rapidly determined.

Referring to S130, the target discharge power may be the output power of the target battery.

Specifically, the target maximum discharge power may be compared with the first power, and the target discharge power may be determined to be one of the target maximum discharge power and the first power according to the comparison result.

In S140, the target battery is controlled to discharge at the target discharge power, so that the target battery can perform power output more smoothly.

In some embodiments, in order to optimize the power output of the target battery, the target maximum discharge power corresponding to the target duration may include a first maximum discharge power corresponding to a first duration, where the first duration may include a duration greater than a fourth threshold value of a plurality of preset durations;

s140 may include:

in the case that the first power is not greater than the first maximum discharge power, the first power is determined as the target discharge power.

Here, the longer the preset duration of discharge, the smaller the maximum discharge power corresponding to the preset duration of discharge. The first sustain discharge period may include a sustain discharge period greater than a fourth threshold value among a plurality of preset sustain discharge periods. The fourth threshold may be set according to actual requirements.

The first duration may include a longest duration of a plurality of preset durations, and thus, the first maximum discharge power may be a minimum of maximum discharge powers respectively corresponding to the plurality of preset durations.

If the first power is not greater than the first maximum discharge power, the power output by the target battery is not greater than the minimum first maximum discharge power, so that the target battery can support the power output by the target battery, and the continuous discharge reaches the first continuous discharge duration. Thus, the target discharge power can be determined to be the first power, that is, the power currently required to be output by the target battery.

Then, the target battery may be controlled to discharge at the first power and re-execute from S110, proceeding to the next round.

Illustratively, the target battery has a first temperature of 25 ℃, a first state of charge of 30%, and a first power of 2600W. If the target correspondence is shown in table 2, the first duration may be 60s, and the first maximum discharge power may be 2627.7W. Since the first power 2600W is not greater than the first maximum discharge power 2627.7W, it is considered that the target battery can support continuous discharge at the first power 2600W for 90s or more in the current state until the voltage of the target battery drops to the lower limit of the nominal discharge voltage or the first power changes, and thus the target discharge power can be determined to be the first power 2600W.

In some embodiments, in order to make the output power of the target battery meet the power requirement of the load for a longer time, the target maximum discharge power corresponding to the target continuous discharge duration may include a second maximum discharge power corresponding to a second continuous discharge duration, where the second continuous discharge duration may include a continuous discharge duration that is less than a fifth threshold value in a plurality of preset continuous discharge durations;

the method may further comprise:

judging whether the first power is larger than the second maximum discharge power or not under the condition that the first power is larger than the first maximum discharge power;

in the case that the first power is not greater than the second maximum discharge power, the first power is determined as the target discharge power.

Here, the shorter the preset duration of discharge, the greater the maximum discharge power corresponding to the preset duration of discharge. The second sustain discharge period may include a sustain discharge period less than a fifth threshold value among a plurality of preset sustain discharge periods.

The second duration may be, for example, the shortest duration of the plurality of preset durations, and thus, the second maximum discharge power may be the maximum of the maximum discharge powers respectively corresponding to the plurality of preset durations.

And under the condition that the first power is larger than the first maximum discharge power, further judging whether the first power is larger than the second maximum discharge power, if the first power is not larger than the second maximum discharge power, indicating that the power output by the target battery is not larger than the second maximum discharge power, so that the target battery can support the power output by the target battery, which is needed currently, and the continuous discharge reaches the second continuous discharge duration. Thus, it is also possible to determine the target discharge power as the first power, that is, the power that is currently required to be output from the target battery.

Illustratively, the target battery has a first temperature of 25 ℃, a first state of charge of 30%, and a first power of 2800W. If the target correspondence is shown in table 2, the second duration may be 10s, and the second maximum discharge power may be 3002.6W. Since the first power 2800W is not greater than the second maximum discharge power 3002.6W, the target discharge power may be determined to be the first power 2800W.

In some embodiments, in order to improve the sudden drop phenomenon of the output power of the target battery, after determining whether the first power is greater than the second maximum discharge power, the method may further include:

and determining the second maximum discharge power as a target discharge power in the case that the first power is greater than the second maximum discharge power.

Here, if the first power is greater than the second maximum discharge power, it indicates that the power output by the target battery is greater than the greater second maximum discharge power, and the target battery is insufficient to support the power output by the target battery, and the continuous discharge reaches the second continuous discharge duration, but can support the continuous discharge reaches the second continuous discharge duration with the second maximum discharge power. Therefore, the output power of the target battery can be actively reduced to the second maximum discharge power. Accordingly, the target discharge power may be determined to be the second maximum discharge power.

Then, the target battery may be controlled to discharge at the second maximum discharge power.

Illustratively, the target battery has a first temperature of 25 ℃, a first state of charge of 30%, and a first power of 3100W. If the target correspondence is shown in table 2, the second duration may be 10s, and the second maximum discharge power may be 3002.6W. Since the first power 3100W is greater than the second maximum discharge power 3002.6W, the target discharge power may be determined to be the second maximum discharge power 3002.6W.

Based on this, in some embodiments, in order to continuously improve the power dump phenomenon during the target battery discharge, the method may further include, after S150:

acquiring a first duration of continuous discharge of a target battery at a second maximum discharge power;

judging whether the second continuous discharge duration is greater than a sixth threshold value under the condition that the first duration is greater than the second continuous discharge duration;

and controlling the target battery to discharge at the third maximum discharge power in the case that the second continuous discharge duration is not the longest of the plurality of preset continuous discharge durations.

The first duration may be an actual duration during which the target battery continues to discharge at the second maximum discharge power.

Here, it may be determined whether the first period is longer than the second duration, if the first period is longer than the second duration, the state of charge and the temperature change due to the continuous discharge of the target battery with high power, but the first power does not change, so if the continuous discharge with the second maximum discharge power is continued, there is a risk that the target battery reaches the cut-off voltage in advance, triggering the battery protection mechanism, resulting in power output suspension, so that the output power can be actively reduced again, and the power dump phenomenon can be continuously improved. If the first duration is not longer than the second duration, the state of charge and temperature change to some extent because the target battery has been continuously discharged for a period of time, and thus the process can be performed again from S110 to the next round.

The sixth threshold may be set according to actual requirements.

The determining whether the second duration is greater than the sixth threshold may specifically be determining whether the second duration is the longest of a plurality of preset durations.

Before actively reducing the output power again, judging whether the current second maximum discharge power is the maximum discharge power corresponding to the longest continuous discharge duration in a plurality of preset continuous discharge durations, if not, indicating that the maximum discharge power lower than the second maximum discharge power exists in the target corresponding relation, so that the output power can be actively reduced again; if so, execution may resume from S110, proceeding to the next round.

When determining the reduced output power, a maximum discharge power smaller than and closest to the second maximum discharge power among the plurality of maximum discharge powers corresponding to the first temperature and the first state of charge in the target correspondence relationship may be selected as the reduced output power, that is, the third maximum discharge power.

Specifically, the third maximum discharge power may include a maximum discharge power corresponding to the third duration of discharge. The third sustain discharge period may include a sustain discharge period longer than the second sustain discharge period among the plurality of preset sustain discharge periods and a difference from the second sustain discharge period is less than a seventh threshold value.

The seventh threshold may be set according to actual requirements.

The third duration may be, for example, a duration longer than the second duration and having the smallest difference from the second duration among the plurality of preset durations.

For example, a plurality of preset duration discharge durations may be ordered from short to long in advance. For example, the plurality of preset sustain discharge durations in table 2 may be ordered as 10s, 20s, 60s, 10s may be designated as 1 st order, 20s as 2 nd order, and 60s as 3 rd order. Based on this, if the first duration of the target battery continuously discharging at the second maximum discharge power 3002.6W is 11s, since the first duration 11s is greater than the second duration 10s, it may be determined whether the second duration 10s is the highest order, if not, the order "1" of the second duration 10s may be designated as i, and then the target battery is controlled to discharge at the i+1st order, that is, the 2 nd order, and the corresponding third maximum discharge power 2764.4W when the third preset duration is 20 s.

In some embodiments, in order to maintain the effect of improving the power dump phenomenon, after the control target battery is discharged at the third maximum discharge power, the method may further include:

and updating the second maximum discharge power to the third maximum discharge power, and returning to execute the first time period for continuously discharging the target battery with the second maximum discharge power.

Here, after the control target battery is discharged at the third maximum discharge power, the second maximum discharge power may be updated to the third maximum discharge power, and the execution may be restarted by returning to the step of acquiring the first period of time during which the target battery is continuously discharged at the second maximum discharge power.

For example, the second maximum discharge power 3002.6W may be updated to the third maximum discharge power 2764.4W, i=i+1=1+1=2, and then the first duration of the target battery continuously discharging with the updated second maximum discharge power 2764.4W is re-acquired, if the first duration is 21s, since the first duration 21s is greater than the preset duration 20s of the 2 nd order, it may be determined whether the 2 nd order is the highest order, if not, the 2 nd order may be denoted as i, i.e., i=2, and then the target battery is controlled to discharge with the corresponding maximum discharge power 2627.7W at the i+1th order, i.e., 3 rd order, and the preset duration is 60 s.

To better describe the whole scheme, based on the above embodiments, as a specific example, as shown in fig. 2, the power output method of the battery may include S201-S213, which will be explained in detail below.

S201, acquiring a first state parameter, a first power and a target corresponding relation of a target battery.

S202, judging whether the first state parameter is a target state parameter.

If yes, executing S203; if not, the process returns to S201.

S203, determining a first maximum discharge power corresponding to the first continuous discharge duration of the target battery under the first state parameter based on the target corresponding relation.

S204, judging whether the first power is larger than the first maximum discharge power.

If yes, executing S205; if not, S213 is performed.

S205, determining a second maximum discharge power corresponding to a second continuous discharge duration of the target battery under the first state parameter based on the target corresponding relation.

S206, judging whether the first power is larger than the second maximum discharge power.

If yes, then execute S207; if not, S213 is performed.

S207, the target battery is controlled to discharge at the second maximum discharge power.

S208, a first duration of continuous discharging of the target battery at the second maximum discharging power is acquired.

S209, judging whether the first time period is longer than the second continuous discharge time period.

If yes, executing S210; if not, the process returns to S201.

S210, judging whether the second continuous discharge time period is the longest of a plurality of preset continuous discharge time periods.

If yes, returning to execute S201; if not, S211 is executed.

S211, controlling the target battery to discharge at the third maximum discharge power.

S212, the second maximum discharge power is updated to the third maximum discharge power, and the process returns to S208.

S213, the control target battery is discharged at the first power, and S201 is executed back.

The specific process and meaning of each step may be referred to the above embodiments, and are not described herein.

According to the embodiment of the application, the battery can output power more stably by adjusting the actual output power of the target battery, the use experience of a user is improved, the target battery can be protected, and the service life of the target battery is prolonged.

Based on the same inventive concept, the embodiment of the application also provides a power output device of the battery. The power output apparatus of the battery according to the embodiment of the present application will be described in detail with reference to fig. 3.

Fig. 3 is a schematic structural diagram of a power output apparatus of a battery according to an embodiment of the present application.

As shown in fig. 3, the power output apparatus of the battery may include:

the obtaining module 301 is configured to obtain a first state parameter of the target battery, a first power, and a target corresponding relationship, where the target corresponding relationship is a corresponding relationship between a preset state parameter, a preset duration of discharge, and a maximum discharge power of the target battery;

the first determining module 302 is configured to determine, based on the target correspondence, a target maximum discharge power corresponding to a target continuous discharge duration of the target battery under the first state parameter when the first state parameter is the target state parameter, where the target state parameter is higher than a calibration state parameter corresponding to a target battery when a discharge power dip phenomenon occurs, where the discharge power dip phenomenon is a phenomenon that the discharge power drops by more than a preset value within a preset duration, and the preset continuous discharge duration includes the target continuous discharge duration;

A second determining module 303, configured to determine a target discharge power according to the target maximum discharge power and the first power;

and a control module 304 for controlling the target battery to discharge at the target discharge power.

In some embodiments, to obtain a more accurate target correspondence, the obtaining module 301 may include:

the first acquisition submodule is used for acquiring the electric parameters of the target battery in a target process, wherein the target process is a process of discharging from a plurality of preset state parameters to a state parameter threshold value respectively in a preset continuous discharging time length;

The first determining submodule is used for determining maximum discharge power corresponding to the preset state parameters according to the electric parameters corresponding to the preset state parameters;

and the fitting sub-module is used for fitting a plurality of preset state parameters and the maximum discharge power corresponding to the preset state parameters respectively to obtain a target corresponding relation corresponding to the preset duration discharge time.

In some embodiments, in order to obtain a target correspondence with better smoothness, the fitting sub-module may include:

the fitting unit is used for fitting a plurality of preset state parameters and the maximum discharge power corresponding to the preset state parameters respectively through a plurality of fitting modes to obtain a plurality of corresponding relations corresponding to the preset continuous discharge duration;

the searching unit is used for searching the corresponding relation meeting the preset condition from the corresponding relations to obtain the target corresponding relation corresponding to the preset continuous discharge time length, and the preset condition is determined based on the energy and the maximum discharge power in the corresponding relations corresponding to the preset continuous discharge time length.

In some embodiments, in order to further improve the smoothness of the maximum discharge power in the target correspondence, the preset conditions include:

the total energy after fitting corresponding to the preset continuous discharge time length in the target corresponding relation is not more than the total energy before fitting, the difference value between the total energy before fitting and the total energy after fitting is smaller than a first threshold value, the total energy after fitting comprises the sum of a plurality of first energies corresponding to the preset continuous discharge time length after fitting, the total energy before fitting comprises the sum of a plurality of second energies corresponding to the preset continuous discharge time length before fitting, the plurality of first energies are products of a plurality of maximum discharge powers corresponding to the preset continuous discharge time length after fitting and the preset continuous discharge time length respectively, and the plurality of second energies are products of a plurality of maximum discharge powers corresponding to the preset continuous discharge time length before fitting and the preset continuous discharge time length respectively;

In some embodiments, in order to optimize the power output of the target battery, the target maximum discharge power corresponding to the target duration includes a first maximum discharge power corresponding to a first duration, the first duration including a duration greater than a fourth threshold of a plurality of preset durations;

the second determining module 303 includes:

and a second determining sub-module for determining the first power as the target discharge power in case the first power is not greater than the first maximum discharge power.

In some embodiments, in order to make the output power of the target battery meet the power requirement of the load for a longer time, the target maximum discharge power corresponding to the target continuous discharge duration includes a second maximum discharge power corresponding to a second continuous discharge duration, where the second continuous discharge duration includes a continuous discharge duration that is less than a fifth threshold value in a plurality of preset continuous discharge durations;

The apparatus may further include:

the first judging submodule is used for judging whether the first power is larger than the second maximum discharge power or not under the condition that the first power is larger than the first maximum discharge power;

and a third determining sub-module for determining the first power as the target discharge power in case that the first power is not greater than the second maximum discharge power.

In some embodiments, to improve the sudden drop in the target battery output power, the apparatus may further include:

and a fourth determination sub-module for determining the second maximum discharge power as the target discharge power in the case that the first power is greater than the second maximum discharge power after determining whether the first power is greater than the second maximum discharge power.

In some embodiments, to continuously improve the power dip phenomenon during the target battery discharging, the apparatus may further include:

the second obtaining submodule is used for obtaining a first duration of continuous discharge of the target battery at a second maximum discharge power after the target battery is controlled to discharge at the target discharge power;

the second judging submodule is used for judging whether the second continuous discharge duration is greater than a sixth threshold value or not under the condition that the first duration is greater than the second continuous discharge duration;

And the control submodule is used for controlling the target battery to discharge at a third maximum discharge power under the condition that the second continuous discharge duration is not greater than a sixth threshold value, wherein the third maximum discharge power comprises the maximum discharge power corresponding to the third continuous discharge duration, and the third continuous discharge duration comprises a continuous discharge duration which is longer than the second continuous discharge duration and has a difference value smaller than the seventh threshold value from among a plurality of preset continuous discharge durations.

In some embodiments, to maintain the improved effect on the power dip phenomenon, the apparatus may further include:

and the updating sub-module is used for updating the second maximum discharge power to the third maximum discharge power after the control target battery is discharged at the third maximum discharge power, and returning to execute the first duration of continuously discharging the target battery at the second maximum discharge power.

Fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

As shown in fig. 4, the electronic device 4 is capable of implementing a structural diagram of an exemplary hardware architecture of the electronic device according to the power output method of the battery and the power output apparatus of the battery in the embodiment of the present application. The electronic device may refer to an electronic device in an embodiment of the present application.

The electronic device 4 may comprise a processor 401 and a memory 402 in which computer program instructions are stored.

In particular, the processor 401 described above may include a Central Processing Unit (CPU), or an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), or may be configured as one or more integrated circuits implementing embodiments of the present application.

Memory 402 may include mass storage for data or instructions. By way of example, and not limitation, memory 402 may comprise a Hard Disk Drive (HDD), floppy Disk Drive, flash memory, optical Disk, magneto-optical Disk, magnetic tape, or universal serial bus (Universal Serial Bus, USB) Drive, or a combination of two or more of the foregoing. Memory 402 may include removable or non-removable (or fixed) media, where appropriate. Memory 402 may be internal or external to the integrated gateway disaster recovery device, where appropriate. In a particular embodiment, the memory 402 is a non-volatile solid state memory. In particular embodiments, memory 402 may include Read Only Memory (ROM), random Access Memory (RAM), magnetic disk storage media devices, optical storage media devices, flash memory devices, electrical, optical, or other physical/tangible memory storage devices. Thus, in general, memory 402 includes one or more tangible (non-transitory) computer-readable storage media (e.g., memory devices) encoded with software comprising computer-executable instructions and when the software is executed (e.g., by one or more processors) it is operable to perform the operations described with reference to a method in accordance with an aspect of the application.

The processor 401 reads and executes the computer program instructions stored in the memory 402 to implement the power output method of any one of the batteries in the above-described embodiments.

In one example, the electronic device may also include a communication interface 403 and a bus 404. As shown in fig. 4, the processor 401, the memory 402, and the communication interface 403 are connected to each other by a bus 404 and perform communication with each other.

The communication interface 403 is mainly used to implement communication between each module, device, unit and/or apparatus in the embodiment of the present application.

Bus 404 includes hardware, software, or both, that couple components of the electronic device to one another. By way of example, and not limitation, the buses may include an Accelerated Graphics Port (AGP) or other graphics bus, an Enhanced Industry Standard Architecture (EISA) bus, a Front Side Bus (FSB), a HyperTransport (HT) interconnect, an Industry Standard Architecture (ISA) bus, an infiniband interconnect, a Low Pin Count (LPC) bus, a memory bus, a micro channel architecture (MCa) bus, a Peripheral Component Interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a Serial Advanced Technology Attachment (SATA) bus, a video electronics standards association local (VLB) bus, or other suitable bus, or a combination of two or more of the above. Bus 404 may include one or more buses, where appropriate. Although embodiments of the application have been described and illustrated with respect to a particular bus, the application contemplates any suitable bus or interconnect.

The electronic device may perform the power output method of the battery in the embodiment of the present application, thereby implementing the power output method and apparatus of the battery described in connection with fig. 1 to 3.

In addition, in combination with the power output method of the battery in the above embodiment, the embodiment of the application may be implemented by providing a computer storage medium. The computer storage medium has stored thereon computer program instructions; the computer program instructions, when executed by a processor, implement a method of power output of any of the batteries of the above embodiments.

It should be understood that the application is not limited to the particular arrangements and instrumentality described above and shown in the drawings. For the sake of brevity, a detailed description of known methods is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method processes of the present application are not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between steps, after appreciating the spirit of the present application.

The functional blocks shown in the above-described structural block diagrams may be implemented in hardware, software, firmware, or a combination thereof. When implemented in hardware, it may be, for example, an electronic circuit, an Application Specific Integrated Circuit (ASIC), suitable firmware, a plug-in, a function card, or the like. When implemented in software, the elements of the application are the programs or code segments used to perform the required tasks. The program or code segments may be stored in a machine readable medium or transmitted over transmission media or communication links by a data signal carried in a carrier wave. A "machine-readable medium" may include any medium that can store or transfer information. Examples of machine-readable media include electronic circuitry, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio Frequency (RF) links, and the like. The code segments may be downloaded via computer networks such as the internet, intranets, etc.

It should also be noted that the exemplary embodiments mentioned in this disclosure describe some methods or systems based on a series of steps or devices. However, the present application is not limited to the order of the above-described steps, that is, the steps may be performed in the order mentioned in the embodiments, or may be performed in a different order from the order in the embodiments, or several steps may be performed simultaneously.

Aspects of the present application are described above with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each block of the flowchart illustrations and/or block diagrams, and combinations of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, enable the implementation of the functions/acts specified in the flowchart and/or block diagram block or blocks. Such a processor may be, but is not limited to being, a general purpose processor, a special purpose processor, an application specific processor, or a field programmable logic circuit. It will also be understood that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware which performs the specified functions or acts, or combinations of special purpose hardware and computer instructions.

While the application has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the application, and in particular, the technical features set forth in the various embodiments may be combined in any manner so long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. A power output method of a battery, comprising:

acquiring a first state parameter, first power and a target corresponding relation of a target battery, wherein the target corresponding relation is a corresponding relation among a preset state parameter, a preset continuous discharge duration and maximum discharge power of the target battery;

under the condition that the first state parameter is a target state parameter, determining a target maximum discharge power corresponding to a target continuous discharge time length of the target battery under the first state parameter based on the target corresponding relation, wherein the target state parameter is higher than a calibration state parameter corresponding to the target battery when a discharge power sudden drop phenomenon occurs, the discharge power sudden drop phenomenon is a phenomenon that the discharge power drops to exceed a preset value within a preset time length, and the preset continuous discharge time length comprises the target continuous discharge time length;

Determining a target discharge power according to the target maximum discharge power and the first power;

and controlling the target battery to discharge at the target discharge power.

2. The method of claim 1, wherein obtaining the target correspondence of the target battery comprises:

for each of a plurality of preset duration, the following steps are respectively executed to obtain target corresponding relations respectively corresponding to the plurality of preset duration:

acquiring electrical parameters of the target battery in a target process, wherein the target process is a process of discharging from a plurality of preset state parameters to a state parameter threshold value respectively in the preset continuous discharge time length;

fitting the plurality of preset state parameters and the maximum discharge power corresponding to the preset state parameters respectively to obtain a target corresponding relation corresponding to the preset duration.

3. The method according to claim 2, wherein the fitting the plurality of preset state parameters and the maximum discharge powers corresponding to the preset continuous discharge time periods to obtain the target corresponding relation corresponding to the preset continuous discharge time periods includes:

Fitting the preset state parameters and the maximum discharge power corresponding to the preset state parameters respectively through a plurality of fitting modes to obtain a plurality of corresponding relations corresponding to the preset continuous discharge duration;

searching for a corresponding relation meeting a preset condition from the corresponding relations to obtain a target corresponding relation corresponding to the preset continuous discharge time, wherein the preset condition is determined based on energy and maximum discharge power in the corresponding relations corresponding to the preset continuous discharge time.

4. A method according to claim 3, wherein the preset conditions include:

the total energy after fitting corresponding to the preset duration of discharge in the target corresponding relation is not more than the total energy before fitting, the difference between the total energy before fitting and the total energy after fitting is smaller than a first threshold, the total energy after fitting comprises the sum of a plurality of first energies corresponding to the preset duration of discharge after fitting, the total energy before fitting comprises the sum of a plurality of second energies corresponding to the preset duration of discharge before fitting, the plurality of first energies are products of a plurality of maximum discharge powers corresponding to the preset duration of discharge after fitting and the preset duration of discharge respectively, and the plurality of second energies are products of a plurality of maximum discharge powers corresponding to the preset duration of discharge before fitting and the preset duration of discharge respectively;

The average value of the maximum discharge power respectively corresponding to the preset continuous discharge duration under a plurality of preset state parameters in the target corresponding relation is larger than a second threshold value;

and the range of the maximum discharge power respectively corresponding to the preset continuous discharge duration under a plurality of preset state parameters in the target corresponding relation is smaller than a third threshold.

5. The method of claim 1, wherein the target maximum discharge power corresponding to the target duration comprises a first maximum discharge power corresponding to a first duration, the first duration comprising a duration greater than a fourth threshold among the plurality of preset durations;

the determining the target discharge power according to the target maximum discharge power and the first power includes:

and determining the first power as the target discharge power in the case that the first power is not greater than the first maximum discharge power.

6. The method of claim 5, wherein the target maximum discharge power corresponding to the target duration comprises a second maximum discharge power corresponding to a second duration, the second duration comprising a duration less than a fifth threshold among the plurality of preset durations;

The method further comprises the steps of:

and determining the first power as the target discharge power in the case that the first power is not greater than the second maximum discharge power.

7. The method of claim 6, wherein after said determining whether the first power is greater than a second maximum discharge power, the method further comprises:

and determining the second maximum discharge power as the target discharge power in the case that the first power is greater than the second maximum discharge power.

8. The method of claim 7, wherein after said controlling the target battery to discharge at the target discharge power, the method further comprises:

acquiring a first duration of continuous discharge of the target battery at the second maximum discharge power;

judging whether the second continuous discharge duration is greater than a sixth threshold value or not under the condition that the first duration is greater than the second continuous discharge duration;

and under the condition that the second continuous discharge duration is not greater than the sixth threshold, controlling the target battery to discharge at a third maximum discharge power, wherein the third maximum discharge power comprises a maximum discharge power corresponding to a third continuous discharge duration, and the third continuous discharge duration comprises a continuous discharge duration which is longer than the second continuous discharge duration and is smaller than a seventh threshold in a plurality of preset continuous discharge durations.

9. The method of claim 8, wherein after said controlling the target battery to discharge at a third maximum discharge power, the method further comprises:

updating the second maximum discharge power to the third maximum discharge power, and returning to execute the first duration of obtaining the target battery to continue discharging at the second maximum discharge power.

10. A power output apparatus of a battery, the apparatus comprising:

the device comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring a first state parameter, first power and target corresponding relation of a target battery, wherein the target corresponding relation is a corresponding relation among a preset state parameter, a preset continuous discharge duration and maximum discharge power of the target battery;

the first determining module is configured to determine, based on the target correspondence, a target maximum discharge power corresponding to a target continuous discharge duration of the target battery in the first state parameter when the first state parameter is the target state parameter, where the target state parameter is higher than a calibration state parameter corresponding to a target battery when a discharge power dip phenomenon occurs, where the discharge power dip phenomenon is a phenomenon that the discharge power drops by more than a preset value in a preset duration, and the preset continuous discharge duration includes the target continuous discharge duration;

The second determining module is used for determining target discharge power according to the target maximum discharge power and the first power;

and the control module is used for controlling the target battery to discharge at the target discharge power.

11. An electronic device, the device comprising: a processor and a memory storing computer program instructions;

the processor, when executing the computer program instructions, implements a method of power output of a battery as claimed in any one of claims 1-9.

12. A computer storage medium having stored thereon computer program instructions which, when executed by a processor, implement a method of power output of a battery as claimed in any one of claims 1 to 9.

13. A computer program product, characterized in that instructions in the computer program product, when executed by a processor of an electronic device, cause the electronic device to perform the power output method of a battery as claimed in any of claims 1-9.