CN116626526B - Method, device, terminal and storage medium for detecting battery health state - Google Patents
Method, device, terminal and storage medium for detecting battery health state Download PDFInfo
- Publication number
- CN116626526B CN116626526B CN202310911224.7A CN202310911224A CN116626526B CN 116626526 B CN116626526 B CN 116626526B CN 202310911224 A CN202310911224 A CN 202310911224A CN 116626526 B CN116626526 B CN 116626526B
- Authority
- CN
- China
- Prior art keywords
- battery
- current
- voltage
- detected
- state
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000036541 health Effects 0.000 title claims abstract description 104
- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000001514 detection method Methods 0.000 claims abstract description 116
- 230000004044 response Effects 0.000 claims description 20
- 230000006870 function Effects 0.000 claims description 17
- 230000005611 electricity Effects 0.000 claims description 6
- 238000004590 computer program Methods 0.000 claims description 5
- 238000004364 calculation method Methods 0.000 abstract description 10
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 47
- 229910001416 lithium ion Inorganic materials 0.000 description 47
- 230000008859 change Effects 0.000 description 15
- 238000010586 diagram Methods 0.000 description 8
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 8
- 238000012549 training Methods 0.000 description 8
- 238000012544 monitoring process Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000003862 health status Effects 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000005309 stochastic process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/392—Determining battery ageing or deterioration, e.g. state of health
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/367—Software therefor, e.g. for battery testing using modelling or look-up tables
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a method, a device, a terminal and a storage medium for detecting the state of health of a battery, wherein the method for detecting the state of health of the battery comprises the following steps: responding to the battery to be detected in a charging stage, and acquiring detection information of the battery to be detected in an initial state; detecting to obtain detection information of the battery to be detected in the current state; responding to the detection information of the initial state and the detection information of the current state corresponding to the battery to be detected, and determining the initial residual capacity of the battery to be detected based on the detection information of the initial state and the current residual capacity of the battery to be detected based on the detection information of the current state; and determining the health state of the battery to be detected based on the initial residual capacity and the current residual capacity corresponding to the battery to be detected. According to the method and the device, the capacity attenuation rule of the battery to be detected is combined, the accuracy of the residual electric quantity corresponding to the charging state and the current state is improved, and the calculation error of the health state of the battery to be detected is reduced.
Description
Technical Field
The present invention relates to the field of batteries, and in particular, to a method, an apparatus, a terminal, and a storage medium for detecting a battery state of health.
Background
With the increasing attention of consumers to the safety and life of new energy automobiles, the estimation of the life of a rechargeable battery as a power source of the new energy automobile becomes an important point of the estimation of the state of the rechargeable battery.
In the use process of the battery pack of the rechargeable battery, the capacity of the battery pack is gradually attenuated due to the fact that all battery monomers cannot be completely consistent, the charging and discharging temperatures of the battery pack are different, the self-discharging rate is also different and the like, so that the driving mileage of an electric automobile is affected. Currently, when estimating the SOH of a rechargeable battery, the state of health of the battery pack is estimated based on a linear relationship between the change value of the battery voltage and the change value of the charge amount of the battery cell during the charging process.
Disclosure of Invention
The invention mainly solves the technical problem of providing a method, a device, a terminal and a storage medium for detecting the state of health of a battery, and can improve the detection accuracy of the state of health of the battery.
In a first aspect, the present application provides a method for detecting a state of health of a battery, where the method for detecting a state of health of a battery includes: responding to the battery to be detected in a charging stage, and acquiring detection information of the battery to be detected in an initial state; detecting to obtain detection information of the battery to be detected in the current state; responding to the detection information of the initial state and the detection information of the current state corresponding to the battery to be detected, and determining the initial residual capacity of the battery to be detected based on the detection information of the initial state and the current residual capacity of the battery to be detected based on the detection information of the current state; and determining the health state of the battery to be detected based on the initial residual capacity and the current residual capacity corresponding to the battery to be detected.
In the technical scheme of the embodiment of the application, the capacity attenuation rule of the battery to be detected is combined, and when the battery to be detected is in a charging stage, whether the charging state and the current state of the battery to be detected are suitable for calculating the health state is judged, so that the accuracy of the residual electric quantity respectively corresponding to the charging state and the current state is improved, and further the calculation error of the health state of the battery to be detected is reduced, so that accurate monitoring of the battery to be detected is realized.
In some embodiments, the detection information of the start state includes a charging voltage, and the detection information of the current state includes a current voltage; the step of determining the initial residual capacity of the battery to be detected based on the detection information of the initial state and the step of determining the current residual capacity of the battery to be detected based on the detection information of the current state comprises the following steps of: and in response to the starting charging voltage being smaller than the reference voltage and the current voltage being larger than the reference voltage, determining the initial residual capacity of the battery to be detected based on the starting charging voltage and determining the current residual capacity of the battery to be detected based on the current voltage.
In the technical scheme of the embodiment of the application, the charging voltage and the current voltage are respectively compared with the reference voltage, so that the unique residual electric quantity corresponding to the charging voltage and the current voltage is determined, and the accuracy of the residual electric quantity corresponding to the charging state and the current state is improved.
In some embodiments, the detection information of the initial state includes a charging current, the detection information of the current state includes a current, and the step of determining the health state of the battery to be detected based on the initial remaining power and the current remaining power corresponding to the battery to be detected includes: determining the accumulated charge quantity of the battery to be detected based on the corresponding charging current and the current of the battery to be detected; and determining the health state of the battery to be detected based on the initial residual capacity, the current residual capacity and the accumulated charge capacity corresponding to the battery to be detected.
In the technical scheme of the embodiment of the application, through starting charging current and current, the accumulated charging quantity of the battery to be detected from the initial state to the current state is determined, and then the health state of the battery to be detected is determined based on the initial remaining quantity, the current remaining quantity and the accumulated charging quantity corresponding to the battery to be detected, so that the detection accuracy of the health state of the battery to be detected is further improved.
In some embodiments, the detection information of the start state further includes a start-up temperature, and the detection information of the current state further includes a current temperature; the step of determining the initial remaining capacity of the battery to be detected based on the initial charging voltage and the current remaining capacity of the battery to be detected based on the current voltage includes: determining an initial residual electric quantity by adopting a function model based on a charging voltage, a charging temperature and a charging current corresponding to the initial state; and determining the current residual capacity by adopting a function model based on the current voltage, the current temperature and the current corresponding to the current state.
According to the technical scheme, through the one-to-one relation between the voltage and the residual electric quantity corresponding to the initial state and the current state respectively, the accurate residual electric quantity corresponding to the initial state and the current state respectively can be obtained, and then the health state of the battery to be detected with higher accuracy can be calculated.
In some embodiments, the step of determining the state of health of the battery to be detected based on the initial remaining power, the current remaining power, and the accumulated charge corresponding to the battery to be detected includes: determining a first numerical value based on a ratio between the accumulated charge quantity and the total quantity of electricity corresponding to the battery to be detected, wherein the total quantity of electricity is the total capacity of the battery to be detected when leaving a factory; determining a second value based on a difference value between the initial residual capacity and the current residual capacity corresponding to the battery to be detected; based on the difference between the first and second values, a state of health of the battery to be detected is determined.
In the technical scheme of the embodiment of the application, the determined health state of the battery to be detected is compared with the health state calculated without considering the attenuation rule of the battery to be detected by the ratio between the accumulated charge quantity and the total charge quantity of the battery to be detected and the difference between the initial residual charge quantity and the current residual charge quantity corresponding to the battery to be detected, and the error of the health state of the battery to be detected in the embodiment is reduced to be within 5%.
In some embodiments, the reference voltages include a first reference voltage and a second reference voltage, the first reference voltage being less than the second reference voltage. In response to the starting charge voltage being less than the reference voltage and the current voltage being greater than the reference voltage, determining the starting remaining capacity of the battery to be detected based on the starting charge voltage and determining the current remaining capacity of the battery to be detected based on the current voltage includes: and in response to the starting charging voltage being smaller than the first reference voltage and the current voltage being larger than the second reference voltage, determining the initial residual capacity of the battery to be detected based on the starting charging voltage and determining the current residual capacity of the battery to be detected based on the current voltage.
In the technical scheme of the embodiment of the application, because two platform voltages exist in the change curve between the voltage corresponding to the battery to be detected and the residual electric quantity, in order to further improve the detection accuracy of the residual electric quantity of the battery to be detected in different states, the charging voltage is compared with the first reference voltage, the current voltage is compared with the second reference voltage, and then whether the charging state and the current state of the battery to be detected are suitable for calculating the health state or not is judged more accurately, the detection accuracy of the residual electric quantity of the battery to be detected in different states is improved, and the calculation accuracy of the health state is improved.
In some embodiments, in response to the starting charge voltage being less than the reference voltage and the current voltage being greater than the reference voltage, determining the starting remaining charge of the battery to be detected based on the starting charge voltage and determining the current remaining charge of the battery to be detected based on the current voltage comprises: in response to the starting charging voltage being less than the reference voltage and the current voltage being equal to the maximum voltage of the battery to be detected, determining an initial remaining capacity of the battery to be detected based on the starting charging voltage and determining a current remaining capacity of the battery to be detected based on the current voltage; the maximum voltage of the battery to be detected is greater than the reference voltage.
In the technical scheme of the embodiment of the application, for convenient detection, the state of health of the battery to be detected is accurately calculated after the battery is full, whether the initial state belongs to the platform voltage is detected, the voltage of the initial state is compared with the first reference voltage, and the voltage of the current state is compared with the maximum voltage.
In a second aspect, the present application provides a device for detecting a state of health of a battery, the device for detecting a state of health of a battery comprising: the detection module is used for responding to the state of charge of the battery to be detected and obtaining the detection information of the battery to be detected in the initial state; the method is also used for detecting and obtaining the detection information of the battery to be detected in the current state; the analysis module is used for responding to the detection information of the initial state and the detection information of the current state corresponding to the battery to be detected and conforming to the corresponding preset requirements, determining the initial residual capacity of the battery to be detected based on the detection information of the initial state and determining the current residual capacity of the battery to be detected based on the detection information of the current state; and the determining module is used for determining the health state of the battery to be detected based on the initial residual capacity and the current residual capacity corresponding to the battery to be detected.
In a third aspect, the present application provides a terminal, the terminal including a memory, a processor, and a computer program stored in the memory and running on the processor, the processor being configured to execute program data to implement a method for detecting a state of health of a battery as in the above embodiments.
In a fourth aspect, the present application provides a computer readable storage medium having a computer program stored thereon, which when executed by a processor implements a method for detecting a state of health of a battery as in the above embodiments.
It will be appreciated that the advantages of the second to fourth aspects may be found in the relevant description of the first aspect and are not repeated here.
The foregoing description is only an overview of the technical solutions of the present application, and may be implemented according to the content of the specification in order to make the technical means of the present application more clearly understood, and in order to make the above-mentioned and other objects, features and advantages of the present application more clearly understood, the following detailed description of the present application will be given.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of a change curve of charging time and voltage corresponding to lithium ion batteries with different attenuation capacities;
fig. 2 is a schematic flow chart of a method for detecting a battery state of health according to the present invention;
FIG. 3 is a schematic diagram of a battery state of health detection device according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a frame of an embodiment of a terminal provided by the present invention;
fig. 5 is a schematic diagram of a frame of an embodiment of a computer readable storage medium according to the present invention.
Detailed Description
Embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical solutions of the present application, and thus are only examples, and are not intended to limit the scope of protection of the present application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions.
In the description of the embodiments of the present application, the technical terms "first," "second," etc. are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, which means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural sheets" refers to two or more (including two).
In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of describing the embodiments of the present application and for simplifying the description, rather than indicating or implying that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.
In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to the specific circumstances.
The state of health of the battery may be represented by SOH (State Of Health), which is also referred to as capacity, health, and performance status of the battery, and specifically refers to the state of the battery from the beginning of life to the end of life of the battery in terms of a percentage, which is used to quantitatively describe the life of the battery, that is, the percentage of the full charge capacity of the battery relative to the rated capacity, and the capacity of the battery to store electrical energy is 100%.
The storage battery can be a lithium ion battery. For example, lithium ion batteries include lithium iron phosphate (LFP) system batteries.
At present, the application field of lithium ion batteries is extremely wide, and particularly in the field of automobiles. In the use process of the lithium ion battery, the capacity of the lithium ion battery is attenuated to different degrees due to different use time, so that the capacity of the lithium ion battery for storing electric energy is affected. In order to ensure that the new energy automobile can safely, stably and efficiently run, necessary management and control are required for the lithium ion battery. The health state of the lithium ion battery represents the aging degree of the lithium ion battery, determines the working state of the lithium ion battery, and influences the safety and normal use of the lithium ion battery. Wherein, the smaller the health state, the more serious the aging of the lithium ion battery. The state of health estimation can optimize the use strategy of the battery and prolong the battery performance decay period, so that accurate estimation of the state of health of the lithium ion battery is necessary.
In order to detect the health state of the lithium ion battery on the new energy automobile, a professional is required to determine the health state of the lithium ion battery by carrying out repeated charge and discharge experiments on the battery. However, the labor cost, time cost and equipment cost required by the method are high, and the loss of the lithium ion battery is caused, so that the method is difficult to realize in application. Accordingly, there is a need to provide a method for monitoring the health status of a lithium ion battery in real time.
At present, in the charging process of the lowest-voltage single battery, the state of health of the lithium ion battery is estimated linearly based on the change value of the residual electric quantity of the battery and the value of the accumulated charging electric quantity. Linear estimation (linear estimation) is an important practical problem of stochastic process theory. The value of the unknown random variable Y is estimated from the observations of the known random variable family { X (t), et } under some optimization criterion. Wherein X (t) is the change value of the residual electric quantity, tET is the value of the accumulated charge electric quantity, and Y is the health state of the lithium ion battery. I.e., the current calculation of the state of health of the lithium-ion battery is based on the capacity fade of the lithium-ion battery occurring at each voltage interval.
As shown in fig. 1, fig. 1 is a schematic diagram of a change curve of charging time and voltage corresponding to lithium ion batteries with different attenuation capacities.
Fig. 1 shows the change curves of charge time and voltage for lithium ion batteries with capacities after decay of 63%, 67%, 74%, 84%, and 95%, respectively. The charging time and voltage change curves corresponding to the lithium ion batteries with different attenuation capacities are obviously different. The smaller the decay capacity of a lithium ion battery, the more charge is required to reach maximum voltage. When the charging capacity of the lithium ion battery is in the first stage, for example, the charging capacity is smaller than 50AH, and the voltage of the lithium ion battery increases along with the increase of the charging quantity; when the lithium ion battery is charged in the second stage, for example, the charging capacity is greater than 50AH and less than 100AH, the voltage of the lithium ion battery is substantially unchanged with the increase of the charging amount, and then the lithium ion voltage enters the first plateau voltage. The lithium ion batteries with different attenuation capacities have smaller corresponding first platform voltage differences. When the lithium ion battery is charged in the third stage, for example, the charging capacity is greater than 100AH, the voltage of the lithium ion battery increases with the increase of the charging capacity, the voltage of the lithium ion battery continues to increase to the maximum voltage after increasing to the second plateau voltage, and the lithium ion battery with the larger attenuation capacity reaches the maximum voltage first. I.e. the corresponding curve differences of the lithium ion batteries with different decay capacities are larger in the third stage.
Since the decay of the lithium ion battery mainly occurs in the third stage, i.e., the decay of the lithium ion battery is not linearly dispersed in each stage. The current calculation of the SOH of the lithium ion battery does not consider the attenuation rule of the lithium ion battery, which results in inaccurate health status of the lithium ion battery.
If the detected voltage of the starting charge state is at the first platform voltage or the detected voltage of the ending charge state is at the second platform voltage when the state of health of the lithium ion battery is calculated, the residual electric quantity corresponding to the starting charge state calculated based on the detected voltage is inaccurate, and the residual electric quantity corresponding to the ending charge state calculated based on the detected voltage is inaccurate. The method comprises the steps of determining that the health state of the lithium ion battery is inaccurate based on the inaccurate residual capacity corresponding to the initial charging state or the inaccurate residual capacity corresponding to the ending charging state.
In the charging time and voltage change curve of the lithium ion battery, the characteristic that the charging time and the voltage are more than one is combined when the voltage of the lithium ion battery is constant, namely, the residual capacity of the battery cannot be determined based on the voltage of the battery. In order to obtain the accurate residual capacity corresponding to the initial charging state, when the voltage corresponding to the initial charging state is smaller than the constant voltage, a one-to-one correspondence exists between the voltage corresponding to the initial charging state and the residual capacity, and the accurate residual capacity corresponding to the initial charging state can be obtained. In order to obtain the accurate residual capacity corresponding to the ending charge state, when the voltage corresponding to the ending charge state is larger than the constant voltage, a one-to-one correspondence exists between the voltage corresponding to the ending charge state and the residual capacity, and the accurate residual capacity corresponding to the ending charge state can be obtained. Based on the accurate residual electric quantity corresponding to the starting charging state and the ending charging state respectively, the accurate health state of the lithium ion battery can be calculated.
Referring to fig. 2, fig. 2 is a flow chart of a method for detecting a battery state of health according to the present invention.
The embodiment provides a method for detecting a battery state of health, which comprises the following steps.
S1: and responding to the state of the battery to be detected in the charging stage, and acquiring detection information of the battery to be detected in the initial state.
S2: and detecting to obtain the detection information of the battery to be detected in the current state.
S3: and responding to the detection information of the initial state and the detection information of the current state corresponding to the battery to be detected, and determining the initial residual capacity of the battery to be detected based on the detection information of the initial state and the current residual capacity of the battery to be detected based on the detection information of the current state.
S4: and determining the health state of the battery to be detected based on the initial residual capacity and the current residual capacity corresponding to the battery to be detected.
In the technical scheme of the embodiment, in combination with the capacity attenuation rule of the battery to be detected, when the battery to be detected is in a charging stage, whether the charging state and the current state of the battery to be detected are suitable for calculating the health state is judged, so that the accuracy of the residual electric quantity corresponding to the charging state and the current state respectively is improved, and further, the calculation error of the health state of the battery to be detected is reduced, so that accurate monitoring of the battery to be detected is realized.
In some embodiments, since the battery to be detected is a lithium iron phosphate battery, it is necessary to determine the charge time versus voltage curve of the lithium iron phosphate battery. The charging time and voltage change curve of the lithium iron phosphate battery comprises two platform voltages. The two platform voltages comprise a first platform voltage and a second platform voltage, wherein the first platform voltage is larger than zero and smaller than the second platform voltage, and the second platform voltage is smaller than the maximum voltage. The first platform voltage may be used as a first reference voltage, and the second platform voltage may be used as a second reference voltage. In another embodiment, the voltage at the intersection of the curve of the voltage of the battery to be detected from zero to the first plateau voltage and the curve corresponding to the first plateau voltage is taken as the first reference voltage. The voltage at the intersection of the curve corresponding to the second plateau voltage and the curve from the second plateau voltage to the maximum voltage is taken as the second reference voltage.
In some embodiments, in response to the battery to be detected being in the charging stage in S1, the step of obtaining the detection information of the battery to be detected in the initial state specifically includes the following implementation manner.
Whether the battery to be detected is in a charging stage or not can be determined by detecting a charging current corresponding to the initial state. Specifically, it is determined whether the charging current is a negative value. And if the charging current is a negative value, determining that the battery to be detected is in a charging stage. The state of the battery to be detected can also be detected through the third party equipment, and when the third party equipment detects that the battery to be detected is in the parking charging stage, the battery to be detected is determined to be in the charging stage. Wherein the third party device may be a vehicle powered by a battery to be detected.
In some embodiments, to improve the detection accuracy, when the charging current of the battery to be detected is detected to be a negative value, the current of the battery to be detected may be continuously detected. And when the current in the preset time period is detected to be negative, determining that the battery to be detected is in a charging stage.
And when the battery to be detected is in the charging state, determining that the battery to be detected is in the charging stage. And when the battery to be detected starts to charge, detecting the battery to be detected which starts to charge to obtain the detection information of the battery to be detected in the initial state.
In some embodiments, the detection information of the start state includes a charging voltage.
In some embodiments, the detection information of the start state includes a charging voltage and a charging current.
In some embodiments, the detection information of the start state includes a charging voltage, a charging current, and a charging temperature.
In some embodiments, the step of detecting the detection information of the current state of the battery to be detected in S2 specifically includes the following implementation manner.
And in the charging stage of the battery to be detected, detecting the battery to be detected in real time to obtain the detection information of the battery to be detected in the current state. For example, the battery to be detected may be detected at intervals of a preset time. In this embodiment, the current state of the battery to be detected is a charged state or a fully charged state of the battery.
In some embodiments, the detection information of the current state includes a current voltage.
In some embodiments, the detection information of the present state includes a present voltage and a present current.
In some embodiments, the current state detection information includes a current voltage, a current, and a current temperature.
In some embodiments, in S3, in response to the detection information of the initial state and the detection information of the current state of the battery to be detected both conform to the corresponding preset requirements, the steps of determining the initial remaining capacity of the battery to be detected based on the detection information of the initial state and determining the current remaining capacity of the battery to be detected based on the detection information of the current state specifically include the following embodiments.
When the detection information of the initial state and the detection information of the current state both accord with the corresponding preset requirements, the initial state and the current state have unique and accurate residual electric quantity.
In one embodiment, the charging voltage and the current voltage are compared with the reference voltage of the battery to be detected, respectively. When the charging voltage is smaller than the reference voltage of the battery to be detected, determining that the detection information of the initial state of the battery to be detected meets the corresponding preset requirement. When the current voltage is larger than the reference voltage of the battery to be detected, determining that the detection information of the current state of the battery to be detected meets the corresponding preset requirement.
When the charging voltage is smaller than the first reference voltage, determining that the detection information of the initial state of the battery to be detected meets the corresponding preset requirement. And when the current voltage is larger than the second reference voltage, determining that the detection information of the current state of the battery to be detected meets the corresponding preset requirement.
In one embodiment, in response to the starting charge voltage being less than the reference voltage and the current voltage being greater than the reference voltage, a starting remaining charge of the battery to be detected is determined based on the starting charge voltage and a current remaining charge of the battery to be detected is determined based on the current voltage.
In an embodiment, in a change curve between a battery voltage corresponding to a battery to be detected and a charge amount, along with a change of the charge amount, a voltage corresponding to a stage in which the change amount of the battery voltage is smaller than a preset value is used as a reference voltage. Specifically, in a variation curve between the battery voltage and the charge amount, a voltage at a constant stage of the battery voltage as the charge amount increases is used as a reference voltage.
Referring to fig. 1, when the battery to be detected is a lithium iron phosphate battery, the variation of the battery voltage is smaller than a preset value when the charge amount is in the 20 ah-160 ah stage, and the range of the reference voltage is [3.2v,3.6v ]. Specifically, when the charge amount is in 50 AH-160 AH stage, the variation of the battery voltage is smaller than the preset value, and the range of the reference voltage is [3.2V,3.6V ]. When the charge quantity is in 50 AH-160 AH stage, the variation of the battery voltage is smaller than the preset value, and the value of the reference voltage can be 3.2V, 3.27V, 3.3V, 3.4V, 3.5V or 3.6V. Specific values of the reference voltage and the charge amount are not limited herein, and related embodiments of the present application may be implemented.
And comparing the charging voltage and the current voltage with the reference voltage respectively to determine that the charging voltage and the current voltage respectively correspond to the unique residual electric quantity, thereby improving the accuracy of the residual electric quantity respectively corresponding to the charging state and the current state.
In some embodiments, the reference voltages include a first reference voltage and a second reference voltage, the first reference voltage being less than the second reference voltage. Comparing the charging voltage with a first reference voltage of the battery to be detected, and comparing the current voltage with a second reference voltage of the battery to be detected. When the charging voltage is smaller than the first reference voltage, determining that the detection information of the initial state of the battery to be detected meets the corresponding preset requirement. And when the current voltage is larger than the second reference voltage, determining that the detection information of the current state of the battery to be detected meets the corresponding preset requirement.
And in response to the charging voltage being smaller than the first reference voltage of the battery to be detected and the current voltage being larger than the second reference voltage of the battery to be detected, determining the initial residual capacity of the battery to be detected based on the charging voltage and determining the current residual capacity of the battery to be detected based on the current voltage.
Referring to fig. 1, when the battery to be detected is a lithium iron phosphate battery, the variation of the battery voltage is smaller than a first preset value when the charge level is in a 20 ah-100 ah stage. The battery voltage with the charge capacity in the 20 AH-100 AH stage is used as a first reference voltage. The first reference voltage may have a value in the range of 3.2v,3.3 v. The first reference voltage may be 3.2V, 3.27V, 3.3V, or the like. When the charge quantity is in the 130 AH-160 AH stage, the variation of the battery voltage is smaller than a second preset value. And taking the battery voltage with the charge quantity in the 130 AH-160 AH stage as a second reference voltage. The range of the second reference voltage may be (3.3V, 3.6V ]. The second reference voltage may be 3.4V, 3.5V, or 3.6V.
Because two reference voltages exist in the change curve between the corresponding voltage and the residual electric quantity of the battery to be detected, in order to further improve the detection accuracy of the residual electric quantity of the battery to be detected in different states, the charging voltage is compared with the first reference voltage, the current voltage is compared with the second reference voltage, and whether the charging state and the current state of the battery to be detected are suitable for calculating the health state or not is judged more accurately, so that the detection accuracy of the residual electric quantity of the battery to be detected in different states is improved, and the calculation accuracy of the health state is improved.
In some embodiments, in response to the starting charge voltage being less than the reference voltage and the current voltage being equal to the maximum voltage of the battery to be detected, determining a starting remaining capacity of the battery to be detected based on the starting charge voltage, determining a current remaining capacity of the battery to be detected based on the current voltage; the maximum voltage of the battery to be detected is greater than the reference voltage. In this embodiment, when the battery to be detected is a lithium iron phosphate battery, the maximum voltage of the battery to be detected is 3.7V.
In order to facilitate detection, the state of health of the battery to be detected is accurately calculated after the battery is full, whether the initial state belongs to the platform voltage is detected, the voltage of the initial state is compared with the reference voltage, and the voltage of the current state is compared with the maximum voltage. In order to accurately calculate the state of health of the battery to be detected after the charging is finished, whether the initial state corresponds to the unique battery residual capacity is detected, the charging voltage of the initial state is compared with the first reference voltage, the current voltage of the current state is compared with the maximum voltage, and the calculation accuracy of the state of health of the battery to be detected is improved.
Specifically, through the voltage information, the current information and the temperature information obtained by detecting the battery to be detected in different states, the residual electric quantity of the battery to be detected in the corresponding state can be calculated, and the accurate residual electric quantity corresponding to different states can be calculated based on the one-to-one correspondence between the voltage and the residual electric quantity.
In some embodiments, a corresponding data table between the battery voltage and the remaining battery power of the battery to be detected may be constructed in advance. When the detection information of the initial state only comprises the charging voltage and the detection information of the current state only comprises the current voltage, the battery residual capacity corresponding to the charging voltage can be searched in a corresponding data table between the battery voltage and the battery residual capacity to serve as initial residual capacity; and searching the residual battery capacity corresponding to the current voltage in a corresponding data table between the battery voltage and the residual battery capacity as the current residual battery capacity.
In some embodiments, when the detection information of the initial state includes a charging voltage, a charging current and a charging temperature, and the detection information of the current state includes a current voltage, a current and a current temperature, in order to obtain accurate residual amounts of the battery to be detected corresponding to different states, a function model may be trained in advance.
The method for training the function model comprises the following steps.
And acquiring a plurality of training data sets, wherein the training data sets comprise temperature data, current data, voltage data and corresponding labeling electric quantity data. For example, a database of one-to-one correspondence of temperature, current, voltage and power data is established in advance.
And inputting the temperature data, the current data and the voltage data into an initial model to obtain predicted electric quantity data.
And training the initial model based on the error value between the predicted electric quantity data and the marked electric quantity data corresponding to the training data set to obtain a function model.
Specifically, the error value between the predicted electric quantity data and the marked electric quantity data corresponding to the training data set is reversely transmitted to the initial model, so that the parameters are adjusted by the initial model. Thereby enabling the initial model to be fitted faster to obtain the function relation between the residual electric quantity data SOC and the temperature T, the current I and the voltage V, namely. And if the error value between the predicted electric quantity data and the marked electric quantity data corresponding to the data set to be trained is smaller than the preset value, stopping training the initial model to obtain the function model.
In order to obtain accurate corresponding relations among temperature data, current data, voltage data and residual electric quantity, a plurality of groups of temperature data, current data, voltage data and corresponding marked electric quantity data which are acquired in advance are learned by a machine, and a functional relation among the residual electric quantity data, the temperature, the current and the voltage is obtained through fitting.
In an embodiment, an initial remaining power corresponding to the initial state is obtained based on the charging voltage, the charging current and the charging temperature.
Specifically, obtaining initial residual electric quantity corresponding to an initial state based on a charging voltage, a charging current and a charging temperature; and obtaining the current residual capacity corresponding to the current state based on the current voltage, the current and the current temperature.
Specifically, a function model is adopted to obtain initial residual electric quantity based on charging voltage, charging current and charging temperature; and obtaining the current residual electric quantity based on the current voltage, the current and the current temperature by adopting a function model. Wherein the current remaining power is greater than the initial remaining power.
In order to further improve the residual electric quantity of the battery to be detected in different states, detection information is directly input into a function model to calculate so as to obtain more accurate residual electric quantity through one-to-one correspondence between voltages corresponding to the initial state and the current state and the residual electric quantity, and the follow-up calculation is facilitated to obtain more accurate health states.
In some embodiments, calculating the state of health of the battery to be detected in S4 specifically includes the following implementation.
In an embodiment, when the detection information of the initial state includes only the charging voltage and the detection information of the current state includes only the current voltage, obtaining the initial remaining power based on the charging voltage, and obtaining the current remaining power based on the current voltage; and determining the health state of the battery to be detected according to the initial residual capacity and the current residual capacity corresponding to the battery to be detected.
In an embodiment, when the detection information of the initial state includes a charging voltage and a charging current, and the detection information of the current state includes a current voltage and a current, the accumulated charging quantity of the battery to be detected may be determined based on the charging current and the current corresponding to the battery to be detected; obtaining initial residual capacity based on the initial charging voltage, and obtaining current residual capacity based on the current voltage; based on the initial residual capacity, the current residual capacity and the accumulated charging capacity corresponding to the battery to be detected, the health state of the battery to be detected is determined, and the detection accuracy of the health state is further improved.
In an embodiment, when the detection information of the initial state includes a charging voltage, a charging current, a charging temperature, and the detection information of the current state includes a current voltage, a current, and a current temperature, the accumulated charging capacity of the battery to be detected may be determined based on the charging current and the current corresponding to the battery to be detected; obtaining more accurate initial residual capacity based on the charging voltage, charging current and charging temperature, and obtaining more accurate current residual capacity based on the current voltage, current and current temperature; and determining the health state of the battery to be detected based on the initial residual capacity, the current residual capacity and the accumulated charge capacity corresponding to the battery to be detected. Based on the residual electric quantity of different states with higher accuracy, the detection accuracy of the health state can be further improved.
In some embodiments, the accumulated charge of the battery to be detected from the initial state to the current state is calculated by the following formula 1。
(equation 1)
Wherein:representing the accumulated charge amount from the start state to the current state; i represents the current of the battery to be detected, and t represents time.
In the embodiment, the accumulated charge quantity can be calculated by an ampere-hour integration method, and the method is simple and the result is reliable.
And determining the accumulated charge quantity of the battery to be detected from the initial state to the current state through the initial charge quantity and the current, and further determining the health state of the battery to be detected based on the initial residual quantity, the current residual quantity and the accumulated charge quantity corresponding to the battery to be detected, so as to further improve the detection accuracy of the health state of the battery to be detected.
In an embodiment, a first value is determined based on a ratio between an accumulated charge amount and a total charge amount corresponding to a battery to be detected, wherein the total charge amount is a total capacity of the battery to be detected when leaving a factory; determining a second value based on a difference value between the initial residual capacity and the current residual capacity corresponding to the battery to be detected; based on the difference between the first and second values, a state of health of the battery to be detected is determined.
The determined health state of the battery to be detected is compared with the health state calculated without considering the attenuation rule of the battery to be detected by the ratio between the accumulated charge quantity and the total charge quantity of the battery to be detected and the difference between the initial residual charge quantity and the current residual charge quantity corresponding to the battery to be detected, and the error of the health state of the battery to be detected in the embodiment is reduced to be within 5%.
In some embodiments, the state of health of the battery to be detected is determined according to the following formula 2 based on the remaining amounts of power of the battery to be detected in the initial state and the current state, respectively, and the accumulated charge amounts from the initial state to the current state.
(equation 2)
Wherein: SOH represents the state of health of the battery to be detected;representing the accumulated charge amount from the start state to the current state; />Indicating the total capacity of the battery to be detected when leaving the factory; SOC (State of Charge) 2 Representing the residual electric quantity of the current state; SOC (State of Charge) 1 A remaining power representing a start state; a is a fitting parameter, and the value is 1.
Through the one-to-one correspondence between the voltage and the residual electric quantity respectively corresponding to the initial state and the current state, the accurate residual electric quantity respectively corresponding to the initial state and the current state can be obtained, and the health state of the battery to be detected with higher accuracy is calculated.
In some embodiments, the data table is constructed by constructing a correspondence between temperature data, current data, voltage data, and a residual charge. And inputting temperature data, current data and voltage data in a corresponding data table into an initial model to obtain predicted residual capacity, training the initial model based on error values between the marked residual capacity and the predicted residual capacity corresponding to the same group of temperature data, current data and voltage data to obtain a function model, and learning the function model to obtain a function relation between the residual capacity and the temperature, current and voltage. A first reference voltage and a maximum voltage of the battery to be detected are obtained. And acquiring the temperature, current and voltage of the battery to be detected in the initial state, and obtaining the charging temperature, charging current and charging voltage. And in response to the charging voltage being smaller than the first reference voltage, judging whether the battery to be detected is in a charging stage. And in response to the charging current being a negative value, determining that the battery to be detected is in a charging stage. And inputting the charging temperature, the charging current and the charging voltage into a function model to obtain the initial residual electric quantity of the battery to be detected in the initial state. And acquiring the temperature, the current and the voltage of the battery to be detected in real time. And judging whether the current voltage in the current state is the maximum voltage of the battery to be detected. And in response to the current voltage of the current state being the maximum voltage of the battery to be detected, calculating the health state of the battery to be detected through a formula 2.
When the maximum error value of the health state calculated without considering the attenuation rule of the battery to be detected reaches 20%, the error value of the health state calculated by the battery health state detection method in the embodiment is reduced to be within 5%, so that the accuracy of the health state of the battery to be detected is improved.
Referring to fig. 3, fig. 3 is a schematic frame diagram of an embodiment of a battery state of health detection device according to the present invention.
The application provides a detection device 40 for a battery state of health, wherein the detection device 40 for the battery state of health comprises a detection module 41, an analysis module 42 and a determination module 43.
The detection module 41 is configured to obtain detection information of the battery to be detected in an initial state in response to the battery to be detected being in a charging stage; and the detection information is also used for detecting and obtaining the detection information of the battery to be detected in the current state.
The analysis module 42 is configured to determine an initial remaining capacity of the battery to be detected based on the detection information of the initial state and determine a current remaining capacity of the battery to be detected based on the detection information of the current state, in response to the detection information of the initial state and the detection information of the current state corresponding to the battery to be detected both meeting corresponding preset requirements.
The determining module 43 is configured to determine a health status of the battery to be detected based on the initial remaining power and the current remaining power corresponding to the battery to be detected.
In the technical scheme of the embodiment of the application, the capacity attenuation rule of the battery to be detected is combined, and when the battery to be detected is in a charging stage, whether the charging state and the current state of the battery to be detected are suitable for calculating the health state is judged, so that the accuracy of the residual electric quantity respectively corresponding to the charging state and the current state is improved, and further the calculation error of the health state of the battery to be detected is reduced, so that accurate monitoring of the battery to be detected is realized.
Referring to fig. 4, fig. 4 is a schematic diagram of a frame of an embodiment of a terminal according to the present invention. The terminal 80 comprises a memory 81 and a processor 82 coupled to each other, the processor 82 being configured to execute program instructions stored in the memory 81 to implement the steps of any of the above-described embodiments of the method for detecting a battery state of health. In one particular implementation scenario, terminal 80 may include, but is not limited to: a microcomputer, a server, and in addition, the terminal 80 may also include, but is not limited to, a mobile device such as a notebook computer, a tablet computer, etc.
Specifically, the processor 82 is configured to control itself and the memory 81 to implement the steps of any of the above-described embodiments of the method for detecting a battery state of health. The processor 82 may also be referred to as a CPU (Central Processing Unit ). The processor 82 may be an integrated circuit chip having signal processing capabilities. The processor 82 may also be a general purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a Field programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. In addition, the processor 82 may be commonly implemented by an integrated circuit chip.
The above scheme provides a method for detecting the state of health of a battery, which comprises the following steps: responding to the battery to be detected in a charging stage, and acquiring detection information of the battery to be detected in an initial state; detecting to obtain detection information of the battery to be detected in the current state; responding to the detection information of the initial state and the detection information of the current state corresponding to the battery to be detected, and determining the initial residual capacity of the battery to be detected based on the detection information of the initial state and the current residual capacity of the battery to be detected based on the detection information of the current state; and determining the health state of the battery to be detected based on the initial residual capacity and the current residual capacity corresponding to the battery to be detected.
Referring to fig. 5, fig. 5 is a schematic diagram of a frame of an embodiment of a computer readable storage medium according to the present invention. The computer readable storage medium 90 stores program instructions 901 executable by the processor, the program instructions 901 for implementing the steps of any of the above-described embodiments of a method for detecting a battery state of health.
The above scheme provides a method for detecting the state of health of a battery, which comprises the following steps: responding to the battery to be detected in a charging stage, and acquiring detection information of the battery to be detected in an initial state; detecting to obtain detection information of the battery to be detected in the current state; responding to the detection information of the initial state and the detection information of the current state corresponding to the battery to be detected, and determining the initial residual capacity of the battery to be detected based on the detection information of the initial state and the current residual capacity of the battery to be detected based on the detection information of the current state; and determining the health state of the battery to be detected based on the initial residual capacity and the current residual capacity corresponding to the battery to be detected.
In some embodiments, functions or modules included in an apparatus provided by the embodiments of the present disclosure may be used to perform a method described in the foregoing method embodiments, and specific implementations thereof may refer to descriptions of the foregoing method embodiments, which are not repeated herein for brevity.
The foregoing description of various embodiments is intended to highlight differences between the various embodiments, which may be the same or similar to each other by reference, and is not repeated herein for the sake of brevity.
In the several embodiments provided in the present application, it should be understood that the disclosed methods and apparatus may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of modules or units is merely a logical functional division, and there may be additional divisions of actual implementation, e.g., units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical, or other forms.
In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in part or all or part of the technical solution contributing to the prior art or in the form of a software product stored in a storage medium, including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to perform all or part of the steps of the methods of the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the embodiments, and are intended to be included within the scope of the claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as 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 (7)
1. The method for detecting the state of health of the battery is characterized by comprising the following steps of:
responding to the battery to be detected in a charging stage, and acquiring detection information of the battery to be detected in an initial state; the detection information of the initial state comprises charging voltage and charging current;
Detecting to obtain the detection information of the battery to be detected in the current state; the detection information of the current state comprises a current voltage and a current;
determining an initial remaining capacity of the battery to be detected based on the charging starting voltage and determining a current remaining capacity of the battery to be detected based on the current voltage in response to the charging starting voltage being less than a reference voltage and the current voltage being greater than the reference voltage; the reference voltage is a voltage at a constant stage of the battery voltage along with the increase of the charge quantity;
determining the health state of the battery to be detected based on the initial residual capacity and the current residual capacity corresponding to the battery to be detected;
the step of determining the health state of the battery to be detected based on the initial residual capacity and the current residual capacity corresponding to the battery to be detected includes:
determining the accumulated charge quantity of the battery to be detected based on the charging current and the current corresponding to the battery to be detected;
determining a first numerical value based on a ratio between the accumulated charge quantity and a total quantity of electricity corresponding to the battery to be detected, wherein the total quantity of electricity is the total capacity of the battery to be detected when leaving a factory;
Determining a second value based on a difference value between the initial residual capacity and the current residual capacity corresponding to the battery to be detected;
and determining the health state of the battery to be detected based on the difference value between the first value and the second value.
2. The method according to claim 1, wherein the detection information of the initial state further includes a charging temperature, and the detection information of the current state further includes a current temperature;
the step of determining the initial remaining capacity of the battery to be detected based on the initial charging voltage and the current remaining capacity of the battery to be detected based on the current voltage comprises the following steps:
determining the initial residual electric quantity based on the charging voltage, the charging temperature and the charging current corresponding to the initial state by adopting a function model;
and determining the current residual electric quantity based on the current voltage, the current temperature and the current corresponding to the current state by adopting the function model.
3. The method for detecting a state of health of a battery according to any one of claims 1 to 2, wherein the reference voltages include a first reference voltage and a second reference voltage, the first reference voltage being smaller than the second reference voltage,
The step of determining the initial remaining capacity of the battery to be detected based on the initial charging voltage and the current remaining capacity of the battery to be detected based on the current voltage in response to the initial charging voltage being less than a reference voltage and the current voltage being greater than the reference voltage includes:
and in response to the starting charging voltage being smaller than the first reference voltage and the current voltage being larger than the second reference voltage, determining the initial residual capacity of the battery to be detected based on the starting charging voltage and determining the current residual capacity of the battery to be detected based on the current voltage.
4. The method for detecting a state of health of a battery according to any one of claims 1 to 2, characterized in that,
the step of determining the initial remaining capacity of the battery to be detected based on the initial charging voltage and the current remaining capacity of the battery to be detected based on the current voltage in response to the initial charging voltage being less than a reference voltage and the current voltage being greater than the reference voltage includes:
in response to the starting charge voltage being less than the reference voltage and the current voltage being equal to the maximum voltage of the battery to be detected, determining an initial remaining capacity of the battery to be detected based on the starting charge voltage and determining a current remaining capacity of the battery to be detected based on the current voltage; the maximum voltage of the battery to be detected is larger than the reference voltage.
5. A device for detecting a state of health of a battery, the device comprising:
the detection module is used for responding to the state of charge of the battery to be detected and obtaining the detection information of the battery to be detected in the initial state; the detection information is also used for detecting and obtaining the detection information of the battery to be detected in the current state; the detection information of the initial state comprises charging voltage and charging current; the detection information of the current state comprises a current voltage and a current;
the analysis module is used for responding to the condition that the starting charging voltage is smaller than a reference voltage and the current voltage is larger than the reference voltage, determining the initial residual capacity of the battery to be detected based on the starting charging voltage and determining the current residual capacity of the battery to be detected based on the current voltage; the reference voltage is a voltage at a constant stage of the battery voltage along with the increase of the charge quantity;
the determining module is used for determining the health state of the battery to be detected based on the initial residual capacity and the current residual capacity corresponding to the battery to be detected; the method is also used for determining the accumulated charge quantity of the battery to be detected based on the charging current and the current corresponding to the battery to be detected; determining a first numerical value based on a ratio between the accumulated charge quantity and a total quantity of electricity corresponding to the battery to be detected, wherein the total quantity of electricity is the total capacity of the battery to be detected when leaving a factory; determining a second value based on a difference value between the initial residual capacity and the current residual capacity corresponding to the battery to be detected; and determining the health state of the battery to be detected based on the difference value between the first value and the second value.
6. A terminal comprising a memory, a processor and a computer program stored in the memory and running on the processor, the processor being configured to execute program data to implement the method for detecting a state of health of a battery according to any one of claims 1 to 4.
7. A computer-readable storage medium, wherein a computer program is stored on the computer-readable storage medium, and the computer program when executed by a processor implements the method for detecting a battery state of health according to any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310911224.7A CN116626526B (en) | 2023-07-24 | 2023-07-24 | Method, device, terminal and storage medium for detecting battery health state |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310911224.7A CN116626526B (en) | 2023-07-24 | 2023-07-24 | Method, device, terminal and storage medium for detecting battery health state |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116626526A CN116626526A (en) | 2023-08-22 |
| CN116626526B true CN116626526B (en) | 2023-12-22 |
Family
ID=87592498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310911224.7A Active CN116626526B (en) | 2023-07-24 | 2023-07-24 | Method, device, terminal and storage medium for detecting battery health state |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116626526B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117970158B (en) * | 2024-03-29 | 2024-08-06 | 长城汽车股份有限公司 | Method for determining battery state of health, vehicle and storage medium |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102445663A (en) * | 2011-09-28 | 2012-05-09 | 哈尔滨工业大学 | Method for estimating battery health of electric automobile |
| CN102866361A (en) * | 2012-08-31 | 2013-01-09 | 惠州市亿能电子有限公司 | SOH (state-of-health) online estimation method of battery pack |
| CN103048626A (en) * | 2012-12-17 | 2013-04-17 | 惠州市亿能电子有限公司 | Method for accurately estimating SOC (State of Charge) |
| CN106249158A (en) * | 2016-08-02 | 2016-12-21 | 北京普莱德新能源电池科技有限公司 | Ferric phosphate lithium cell actual active volume detection method, system and electric automobile |
| CN113484762A (en) * | 2021-07-16 | 2021-10-08 | 东风柳州汽车有限公司 | Battery state of health estimation method, device, equipment and storage medium |
| WO2022161002A1 (en) * | 2021-01-27 | 2022-08-04 | 北京嘀嘀无限科技发展有限公司 | Battery state of health prediction method and apparatus, and electronic device and readable storage medium |
| CN114935725A (en) * | 2022-05-31 | 2022-08-23 | 上海瑞浦青创新能源有限公司 | Battery SOH prediction method, storage medium and system |
| WO2022221891A1 (en) * | 2021-04-20 | 2022-10-27 | Aviloo Gmbh | Ascertaining the state of health of a vehicle battery |
| CN115754733A (en) * | 2022-10-24 | 2023-03-07 | 上海电力大学 | Lithium ion health characteristic state estimation method, system, equipment and medium |
-
2023
- 2023-07-24 CN CN202310911224.7A patent/CN116626526B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102445663A (en) * | 2011-09-28 | 2012-05-09 | 哈尔滨工业大学 | Method for estimating battery health of electric automobile |
| CN102866361A (en) * | 2012-08-31 | 2013-01-09 | 惠州市亿能电子有限公司 | SOH (state-of-health) online estimation method of battery pack |
| CN103048626A (en) * | 2012-12-17 | 2013-04-17 | 惠州市亿能电子有限公司 | Method for accurately estimating SOC (State of Charge) |
| CN106249158A (en) * | 2016-08-02 | 2016-12-21 | 北京普莱德新能源电池科技有限公司 | Ferric phosphate lithium cell actual active volume detection method, system and electric automobile |
| WO2022161002A1 (en) * | 2021-01-27 | 2022-08-04 | 北京嘀嘀无限科技发展有限公司 | Battery state of health prediction method and apparatus, and electronic device and readable storage medium |
| WO2022221891A1 (en) * | 2021-04-20 | 2022-10-27 | Aviloo Gmbh | Ascertaining the state of health of a vehicle battery |
| CN113484762A (en) * | 2021-07-16 | 2021-10-08 | 东风柳州汽车有限公司 | Battery state of health estimation method, device, equipment and storage medium |
| CN114935725A (en) * | 2022-05-31 | 2022-08-23 | 上海瑞浦青创新能源有限公司 | Battery SOH prediction method, storage medium and system |
| CN115754733A (en) * | 2022-10-24 | 2023-03-07 | 上海电力大学 | Lithium ion health characteristic state estimation method, system, equipment and medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116626526A (en) | 2023-08-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3550317B1 (en) | Method and device for detecting battery micro-short circuit | |
| EP2963433B1 (en) | Method and apparatus for estimating state of battery | |
| CN105021994B (en) | The method and apparatus of cell uniformity in a kind of detection battery pack | |
| US20190219640A1 (en) | Method and apparatus for detecting micro short circuit of battery | |
| US9411019B2 (en) | Method and system for estimating state of health of battery set | |
| EP4019321B1 (en) | Battery managing method and device, and vehicle | |
| US11346887B2 (en) | Method and apparatus for calculating SOH of battery power pack, and electric vehicle | |
| CN110780210B (en) | Battery pack internal short circuit detection method and device and electric automobile | |
| US9506988B2 (en) | Condition estimation device and method of estimating condition | |
| US20200309857A1 (en) | Methods, systems, and devices for estimating and predicting battery properties | |
| CN110579716B (en) | Battery detection method and device | |
| CN116626526B (en) | Method, device, terminal and storage medium for detecting battery health state | |
| EP4152022B1 (en) | Method for determining full-charge capacity of battery pack, method for determining state of health of battery pack, system, and apparatus | |
| CN113093027B (en) | Battery SOC calibration method, device, system, medium and program product | |
| EP3842816A1 (en) | Soh estimation method of battery pack | |
| CN115097338A (en) | SOC calibration method, SOH estimation method, device and storage medium | |
| CN114487852A (en) | Power battery complementary energy detection method and device, computer equipment and storage medium | |
| CN113419185A (en) | Monomer capacity detection method and system for lithium ion power storage battery | |
| CN108232342B (en) | Storage battery management method and system and storage battery management equipment | |
| CN112421721B (en) | Electric vehicle power management method, device, equipment and storage medium | |
| CN114103729B (en) | Method and device for balancing battery pack and electric automobile | |
| CN115825782A (en) | Capacity calculation method and device for power battery | |
| CN114846346A (en) | Method and system for calculating the available energy of a battery at any moment in its life, its autonomy, capacity and remaining life without discharging it | |
| US20210247453A1 (en) | Methods, systems, and devices for charging advanced sealed lead acid batteries | |
| CN112083343B (en) | Method for acquiring battery remaining energy |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |