CN108594121B - Battery performance parameter obtaining method and device - Google Patents
Battery performance parameter obtaining method and device Download PDFInfo
- Publication number
- CN108594121B CN108594121B CN201810031023.7A CN201810031023A CN108594121B CN 108594121 B CN108594121 B CN 108594121B CN 201810031023 A CN201810031023 A CN 201810031023A CN 108594121 B CN108594121 B CN 108594121B
- Authority
- CN
- China
- Prior art keywords
- soc
- standard
- display
- battery
- acquiring
- 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
- 238000000034 method Methods 0.000 title claims abstract description 54
- 238000013507 mapping Methods 0.000 claims abstract description 85
- 238000012360 testing method Methods 0.000 claims abstract description 45
- 238000004590 computer program Methods 0.000 claims description 15
- 238000004364 calculation method Methods 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 6
- 230000006870 function Effects 0.000 description 5
- 238000013102 re-test Methods 0.000 description 5
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 229910001416 lithium ion Inorganic materials 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
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]
- G01R31/3644—Constructional arrangements
- G01R31/3648—Constructional arrangements comprising digital calculation means, e.g. for performing an algorithm
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 battery performance parameter acquisition method and a device, wherein the method comprises the following steps: acquiring a first mapping relation between a standard state of charge (SOC) and a display SOC; acquiring a first display SOC currently displayed on a screen; acquiring a first standard SOC corresponding to the first display SOC according to the first display SOC and the first mapping relation; and inquiring a second mapping relation between the standard SOC and the battery performance parameters according to the first standard SOC, and acquiring and displaying the battery performance parameters corresponding to the first standard SOC. By the method, tested data can be fully utilized under the condition that the performance parameter test is carried out only once according to standard test conditions, flexible calculation of SOC related performance parameters is achieved, retesting aiming at different use intervals is avoided, consumption of test resources is reduced, and the technical problem that the performance parameters are greatly consumed when retested every time the available capacity window changes in the prior art is solved.
Description
Technical Field
The invention relates to the technical field of batteries, in particular to a battery performance parameter obtaining method and device.
Background
Many electric vehicles are powered by lithium ion batteries, and many parameters of the lithium ion batteries relate to states of Charge (SOC), such as Open Circuit Voltage (OCV), Direct Current Internal Resistance (DCIR), peak Charge/discharge power, and the like.
Generally, when testing performance parameters related to SOC, such as peak charge/discharge power, open-circuit voltage, etc., of a battery, SOC is defined based on a cell rated capacity, and when actually used, SOC is defined based on an available capacity. Since the Depth of Discharge (DOC) may be different when the same battery is used for different products, if parameters such as peak charge/Discharge power, open-circuit voltage and the like are retested every time the available capacity window changes, extremely large testing resources are consumed.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, a first objective of the present invention is to provide a battery performance parameter obtaining method, so as to implement mapping of battery performance parameters of a standard test to performance parameters of different usage intervals by establishing a corresponding relationship between a standard SOC and a display SOC, and enable to fully utilize tested data under the condition of performing a performance parameter test only according to a standard test condition, implement flexible calculation of SOC-related performance parameters, avoid retesting for different usage intervals, reduce consumption of test resources, and solve the technical problem in the prior art that very large test resources are consumed by retesting performance parameters every time a available capacity window changes.
The second objective of the present invention is to provide a battery performance parameter obtaining device.
A third object of the invention is to propose a computer device.
A fourth object of the invention is to propose a non-transitory computer-readable storage medium.
A fifth object of the invention is to propose a computer program product.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides a method for obtaining battery performance parameters, including:
acquiring a first mapping relation between a standard state of charge (SOC) and a display SOC; wherein the standard SOC is an SOC defined based on a rated capacity of a battery and used for representing the current actual remaining SOC of the battery, and the display SOC is an SOC displayed on a display screen and used for representing the current remaining SOC of the battery;
acquiring a first display SOC currently displayed on a screen;
acquiring a first standard SOC corresponding to the first display SOC according to the first display SOC and the first mapping relation;
and inquiring a second mapping relation between the standard SOC and the battery performance parameters according to the first standard SOC, and acquiring and displaying the battery performance parameters corresponding to the first standard SOC.
According to the battery performance parameter obtaining method provided by the embodiment of the invention, the first mapping relation between the standard SOC and the display SOC is obtained, the first display SOC currently displayed on a screen is obtained, the first standard SOC corresponding to the first display SOC is obtained according to the first display SOC and the first mapping relation, and then the second mapping relation between the standard SOC and the battery performance parameter is inquired according to the first standard SOC, so that the battery performance parameter corresponding to the first standard SOC is obtained and displayed. The method realizes the mapping of the battery performance parameters of the standard test to the performance parameters of different use intervals by establishing the corresponding relation between the standard SOC and the display SOC, can fully utilize the tested data under the condition of carrying out the performance parameter test once according to the standard test condition, realizes the flexible calculation of the SOC related performance parameters, avoids the retest aiming at different use intervals, reduces the consumption of test resources, and solves the technical problem that the performance parameters are greatly consumed by retesting each time the change of the available capacity window in the prior art.
In order to achieve the above object, a second embodiment of the present invention provides a battery performance parameter obtaining apparatus, including:
the first acquisition module is used for acquiring a first mapping relation between the standard SOC and the display SOC; wherein the standard SOC is an SOC defined based on a rated capacity of a battery and used for representing the current actual remaining SOC of the battery, and the display SOC is an SOC displayed on a display screen and used for representing the current remaining SOC of the battery;
the second acquisition module is used for acquiring a first display SOC currently displayed on a screen;
a third obtaining module, configured to obtain a first standard SOC corresponding to the first display SOC according to the first display SOC and the first mapping relationship;
and the query acquisition module is used for querying a second mapping relation between the standard SOC and the battery performance parameters according to the first standard SOC, acquiring and displaying the battery performance parameters corresponding to the first standard SOC.
According to the battery performance parameter acquiring device provided by the embodiment of the invention, the first mapping relation between the standard SOC and the display SOC is acquired, the first display SOC currently displayed on the screen is acquired, the first standard SOC corresponding to the first display SOC is acquired according to the first display SOC and the first mapping relation, and then the second mapping relation between the standard SOC and the battery performance parameters is inquired according to the first standard SOC, so that the battery performance parameters corresponding to the first standard SOC are acquired and displayed. The method realizes the mapping of the battery performance parameters of the standard test to the performance parameters of different use intervals by establishing the corresponding relation between the standard SOC and the display SOC, can fully utilize the tested data under the condition of carrying out the performance parameter test once according to the standard test condition, realizes the flexible calculation of the SOC related performance parameters, avoids the retest aiming at different use intervals, reduces the consumption of test resources, and solves the technical problem that the performance parameters are greatly consumed by retesting each time the change of the available capacity window in the prior art.
To achieve the above object, a third embodiment of the present invention provides a computer device, including: the battery performance parameter acquisition method includes a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor executes the computer program to implement the battery performance parameter acquisition method according to the embodiment of the first aspect.
In order to achieve the above object, a fourth aspect of the present invention provides a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the battery performance parameter obtaining method according to the first aspect.
In order to achieve the above object, a fifth embodiment of the present invention provides a computer program product, where instructions of the computer program product, when executed by a processor, implement the battery performance parameter obtaining method according to the first embodiment.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic flow chart of a battery performance parameter obtaining method according to an embodiment of the present invention;
fig. 2 is a schematic flowchart of a method for obtaining a first mapping relationship according to an embodiment of the present invention;
FIG. 3 is a schematic flow chart of a method for establishing a mapping relationship;
fig. 4 is a schematic flowchart of another method for obtaining a first mapping relationship according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a battery performance parameter acquiring apparatus according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a battery performance parameter acquiring apparatus according to another embodiment of the present invention;
fig. 7 is a schematic structural diagram of a battery performance parameter acquiring apparatus according to another embodiment of the present invention;
fig. 8 is a schematic structural diagram of a computer device according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The battery performance parameter acquisition method and apparatus according to the embodiment of the present invention are described below with reference to the drawings.
When the lithium ion battery is applied to an electric automobile, in order to ensure braking energy feedback in a high SOC interval and discharge power in a low SOC interval, improve the use safety of the battery and prolong the service life, a 100% discharge depth is generally not used. Typically, pure electric products typically use 95% -5% SOC (90% DOD); plug-in hybrid products typically use 90% -20% SOC (70% DOD); hybrid products typically use 70% -30% SOC (40% DOD).
Many performance parameters of lithium ion batteries are related to SOC, such as OCV, DCIR, peak charge/discharge power, etc. In general, when testing performance parameters related to SOC, such as peak charge/discharge power, OCV, etc., of a battery, SOC is defined based on a cell rated capacity, i.e., 100% to 0% SOC corresponds to the rated capacity. In actual use, SOC is defined based on available capacity, i.e., 100% -0% SOC corresponds to available capacity (rated capacity × DOD). The DOD may be different when the same battery is used for different products, consuming significant testing resources if the performance parameters associated with the SOC are retested each time the available capacity window changes.
In order to solve the problems, the invention provides a battery performance parameter acquisition method, which fully utilizes tested data to realize flexible calculation of SOC (system on chip) related performance parameters and avoid retesting in different use intervals under the condition of performing performance parameter test only once according to standard test conditions.
Fig. 1 is a schematic flow chart of a battery performance parameter obtaining method according to an embodiment of the present invention.
As shown in fig. 1, the battery performance parameter obtaining method includes the following steps:
Wherein the standard SOC is defined based on the rated capacity of the battery for representing the SOC actually remaining in the battery, and the display SOC is displayed on the display screen for representing the SOC remaining in the battery, that is, the display SOC is defined based on the available capacity of the battery.
In this embodiment, when obtaining the performance parameter related to the SOC of the battery, a first mapping relationship between the standard SOC and the display SOC may be obtained first.
The first mapping relationship may be pre-established and stored, and embodiments of the present invention provide two possible implementation manners of obtaining the first mapping relationship, and a detailed description of each obtaining manner will be given in the following contents, which will not be described herein too much to avoid redundancy.
In this embodiment, the first display SOC currently displayed on the screen may be acquired by reading a display parameter of an instrument panel that displays a remaining condition of the battery.
After the first mapping relation between the standard SOC and the display SOC is obtained and the first display SOC which is currently displayed is obtained, the first standard SOC corresponding to the first display SOC in the first mapping relation can be obtained by inquiring the first mapping relation according to the first display SOC.
For example, assuming that the standard SOC corresponding to 60% of the display SOC is 59% in the first mapping relationship, when the acquired first display SOC is 60%, it may be determined that the first standard SOC corresponding to the current first display SOC is 59% according to the first mapping relationship.
And 104, inquiring a second mapping relation between the standard SOC and the battery performance parameters according to the first standard SOC, and acquiring and displaying the battery performance parameters corresponding to the first standard SOC.
For the same product, the corresponding relation between the standard SOC and the battery performance parameters is determined, so that the corresponding battery performance parameters under different standard SOCs can be tested in advance according to standard test conditions, and a second mapping relation between the standard SOC and the battery performance parameters is established and stored.
Therefore, in this embodiment, after the first standard SOC corresponding to the first display SOC is determined, the battery performance parameter corresponding to the first standard SOC may be acquired according to the first standard SOC by querying the second mapping relationship between the standard SOC and the battery performance parameter and displayed. Because a mapping relation exists between the first standard SOC and the first display SOC, the battery performance parameter obtained according to the first standard SOC is the battery performance parameter corresponding to the first display SOC.
For example, if the first display SOC is 40%, the corresponding first standard SOC is 41%, and the pulse discharge power of the battery cell at the standard SOC of 41% is 1000 watts, the pulse discharge power at the first display SOC of 40% is 1000 watts.
According to the battery performance parameter obtaining method, a first mapping relation between a standard SOC and a display SOC is obtained, a first display SOC currently displayed on a screen is obtained, a first standard SOC corresponding to the first display SOC is obtained according to the first display SOC and the first mapping relation, a second mapping relation between the standard SOC and battery performance parameters is inquired according to the first standard SOC, and the battery performance parameters corresponding to the first standard SOC are obtained and displayed. The method realizes the mapping of the battery performance parameters of the standard test to the performance parameters of different use intervals by establishing the corresponding relation between the standard SOC and the display SOC, can fully utilize the tested data under the condition of carrying out the performance parameter test once according to the standard test condition, realizes the flexible calculation of the SOC related performance parameters, avoids the retest aiming at different use intervals, reduces the consumption of test resources, and solves the technical problem that the performance parameters are greatly consumed by retesting each time the change of the available capacity window in the prior art.
The embodiment of the invention provides two possible implementation modes for obtaining the first mapping relation between the standard SOC and the display SOC, wherein one mode is to obtain the first mapping relation according to the difference value between the available capacity and the rated capacity, and the other mode is to obtain the first mapping relation by inquiring the corresponding relation between the standard SOC and the open-circuit voltage OCV. The following will describe each acquisition mode in detail.
Fig. 2 is a flowchart illustrating a method for obtaining a first mapping relationship according to an embodiment of the present invention.
As shown in fig. 2, on the basis of the embodiment shown in fig. 1, step 101 may include the following steps:
Since the first rated capacity corresponds to the highest rated voltage and the second rated capacity corresponds to the lowest rated voltage, in this embodiment, the first rated capacity and the second rated capacity of the battery can be directly obtained according to the battery-rated parameters.
In this embodiment, when testing the available capacity of the battery, the battery may be operated at the highest operating voltage first, the battery capacity at this time is tested as the first available capacity, and then the battery may be operated at the lowest operating voltage, and the battery capacity at this time is tested as the second available capacity.
After the first rated capacity, the second rated capacity, the first available capacity and the second available capacity of the battery are obtained, the first mapping relationship can be established according to the first rated capacity and the first available capacity, and the second rated capacity and the second available capacity.
Specifically, fig. 3 is a schematic flowchart of a method for establishing a mapping relationship, as shown in fig. 3, step 203 may include the following steps:
and 301, acquiring a second standard SOC when the display SOC displays the full charge of the battery according to the first rated capacity and the first available capacity.
The SOC represents a ratio between the available capacity of the battery and the rated capacity of the battery, and thus, in the present embodiment, the second standard SOC when the display SOC displays the full charge of the battery, that is, the second standard SOC is the standard SOC when the available capacity of the battery is the upper limit value, may be acquired from the acquired first rated capacity and first available capacity.
Specifically, acquiring the second standard SOC when the display SOC displays that the battery is fully charged, based on the first rated capacity and the first available capacity, may include: and obtaining a difference value between the first rated capacity and the first available capacity, then obtaining a first ratio between the difference value and the first rated capacity, and subtracting the maximum display value of the display SOC when the display battery is fully charged from the first ratio to obtain a second standard SOC.
Wherein the first ratio is in the same form as a display value displaying the SOC display. When the display value is a percentage value, the first ratio value is also a percentage value; when the displayed value is a fractional value, the first ratio is also the fractional value.
Taking the display value as a percentage value as an example, assuming that the maximum display value of the SOC display when the battery is fully charged is 100%, the second standard SOC may be obtained by calculation using equation (1).
And 302, acquiring a third standard SOC when the display SOC shows that the battery is completely discharged according to the second rated capacity, the second available capacity and the second standard SOC.
Wherein the third standard SOC is a standard SOC at which the available capacity of the battery is a lower limit value.
Specifically, obtaining the third standard SOC when the display SOC shows that the battery is completely discharged according to the second rated capacity, the second available capacity, and the second standard SOC may include: obtaining a second ratio of a second rated capacity to a second available capacity; and subtracting the second ratio from the second standard SOC to obtain a third standard SOC.
Wherein the second ratio is in the same form as the second standard SOC. When the second standard SOC is a percentage value, the second ratio value is also a percentage value; when the second standard SOC is a fraction value, the second ratio is also a fraction value.
Taking the second standard SOC as a percentage value for example, the third standard SOC can be obtained by calculating according to formula (2).
In this embodiment, after the second standard SOC and the third standard SOC are obtained, the first mapping relationship may be established according to the second standard SOC and the third standard SOC.
Specifically, establishing a first mapping relationship according to the second standard SOC and the third standard SOC includes: for each display value of the display SOC, making a difference value between the second standard SOC and the third standard SOC to obtain a first numerical value; multiplying the first value by the display value to obtain a second value; adding the second numerical value and the third standard SOC to obtain an actual value corresponding to the display value; wherein the actual value is indicative of an actual remaining SOC of the battery; and establishing a first mapping relation by using the acquired display value and the actual value corresponding to the display value. The above-described process of calculating the actual value can be described by the following formula (3).
Actual value (second standard SOC-third standard SOC) × display value + third standard SOC (3)
In this embodiment, after the corresponding actual value is calculated for each display value of the display SOC, a first mapping relationship between the standard SOC and the display SOC may be established using the display value and the corresponding actual value, where the calculated actual value is used as the value of the standard SOC.
According to the method for acquiring the battery performance parameters, the first rated capacity corresponding to the highest calibration voltage and the second rated capacity corresponding to the lowest calibration voltage of the battery are acquired through acquiring, testing and acquiring the first available capacity corresponding to the highest working voltage and the second available capacity corresponding to the lowest working voltage of the battery during working, and then a first mapping relation is established according to the first rated capacity and the first available capacity, the second rated capacity and the second available capacity, so that conditions are provided for mapping the battery performance parameters of standard tests to the performance parameters of different use intervals.
Fig. 4 is a flowchart illustrating another method for obtaining a first mapping relationship according to an embodiment of the present invention.
As shown in fig. 4, on the basis of the embodiment shown in fig. 1, step 101 may include the following steps:
In this embodiment, the battery may be controlled to operate at the highest operating voltage, and the open-circuit voltage at this time is obtained as the first open-circuit voltage, that is, the open-circuit voltage when the battery operates at the upper limit of the available capacity is obtained as the first open-circuit voltage.
For example, assuming that the standard SOC corresponding to the first open-circuit voltage determined by referring to the correspondence table between the open-circuit voltage and the standard SOC is a, the second standard SOC is a when the display value of the display SOC display is 100%.
And 403, acquiring a second open-circuit voltage corresponding to the lowest working voltage of the battery during working.
And controlling the battery to work under the highest working voltage, and acquiring the open-circuit voltage at the moment as a second open-circuit voltage, namely acquiring the open-circuit voltage when the battery works under the lower limit of the available capacity as the second open-circuit voltage.
For example, assuming that the standard SOC corresponding to the second open-circuit voltage determined by referring to the correspondence table between the open-circuit voltage and the standard SOC is b, the third standard SOC is b when the display value of the display SOC display is 0%.
In this embodiment, for the description of step 405, reference may be made to the description of step 303 in the foregoing embodiment, and the implementation principle thereof is similar and is not described herein again.
In the method for obtaining battery performance parameters of the embodiment, a first open-circuit voltage corresponding to the highest working voltage of the battery during working and a second open-circuit voltage corresponding to the lowest working voltage of the battery during working are obtained, a corresponding relation between the open-circuit voltage and a standard SOC is inquired, a corresponding second standard SOC is obtained according to the first open-circuit voltage, a corresponding third standard SOC is obtained according to the second open-circuit voltage, a first mapping relation is established according to the second standard SOC and the third standard SOC, and conditions are provided for mapping the battery performance parameters of a standard test to the performance parameters of different use intervals.
The following illustrates a method for obtaining battery performance parameters according to an embodiment of the present invention.
A voltage window corresponding to the rated capacity of a certain battery is 4.2-2.75V, the rated capacity is 30Ah, a voltage window corresponding to the available capacity is 4.15-3.0V, and the available capacity is 27 Ah. When testing performance parameters such as OCV, DCIR, peak charging/discharging power and the like of the battery, the battery cell constant volume voltage condition is a full voltage window (4.2-2.75V), the constant volume capacity (rated capacity) obtained by testing is 30Ah, and the capacity corresponding to 100% -0% of the absolute SOC of the battery is 30 Ah. The available capacity of the battery is 27Ah within the voltage range of 4.15-3.0V of the working voltage window, and the capacity corresponding to 100% -0% of the SOC displayed by the battery is 27 Ah.
First, the absolute SOC corresponding to 100% of the display SOC is determined and recorded as SOC0. When the capacity difference between the upper limit of the available capacity voltage window of the battery and the upper limit of the rated capacity voltage window is 3Ah, the corresponding absolute SOC (state of charge), namely the SOC at the time of displaying 100 percent of the SOC can be obtained according to the formula (1)0＝100％-(3Ah/30Ah)*100％＝90％。
Then, the absolute SOC corresponding to the display SOC 0% is determined and recorded as SOC1Then, according to the above formula (2), the corresponding absolute SOC at 0% of SOC, i.e. SOC, can be obtained1＝90％-(27Ah/30Ah)*100％＝0％。
According to the above equation (4), a mapping relationship between the display SOC and the standard SOC can be established. For example, if SOC0Is 90% SOC10%, when the displayed SOC is 40%, according to equation (4), the corresponding standard SOC of (90% -0%) by 40% + 5% + 41% when the displayed SOC is 40% can be calculated.
For each display value of the display SOC, the corresponding standard SOC is calculated sequentially from 100% to 0%, and the mapping relationship shown in table 1 is obtained.
TABLE 1
Finally, after the display value of the display SOC is obtained, the corresponding standard SOC is obtained through the query table 1, and then the battery performance parameter is obtained according to the corresponding relation between the standard SOC and the battery performance parameter, so that the battery performance parameter corresponding to the display value of the display SOC can be obtained.
For example, when the display SOC is 40%, the corresponding standard SOC is 41% as determined by referring to table 1, and assuming that the pulse discharge power of the cell at the standard SOC of 41% is 1000W, the pulse discharge power at the display SOC of 40% is also 1000W.
By the battery performance parameter acquisition method, the battery performance parameters of the standard test are mapped to the performance parameters of different use intervals by establishing the corresponding relation between the standard SOC and the display SOC, the tested data can be fully utilized under the condition of performing the performance parameter test only once according to the standard test condition, the flexible calculation of the SOC related performance parameters is realized, the retest aiming at different use intervals is avoided, and the consumption of test resources is reduced.
In order to implement the above embodiments, the present invention further provides a device for acquiring battery performance parameters.
Fig. 5 is a schematic structural diagram of a battery performance parameter acquiring apparatus according to an embodiment of the present invention.
As shown in fig. 5, the battery performance parameter acquiring device 50 includes: a first obtaining module 510, a second obtaining module 520, a third obtaining module 530, and a query obtaining module 540. Wherein the content of the first and second substances,
a first obtaining module 510, configured to obtain a first mapping relationship between a standard state of charge SOC and a display SOC; wherein the standard SOC is an SOC defined based on a rated capacity of the battery for indicating a current actual remaining state of the battery, and the display SOC is an SOC displayed on the display screen for indicating a current remaining state of the battery.
The second obtaining module 520 is configured to obtain a first display SOC currently displayed on the screen.
A third obtaining module 530, configured to obtain the first standard SOC corresponding to the first display SOC according to the first display SOC and the first mapping relationship.
And the query obtaining module 540 is configured to query a second mapping relationship between the standard SOC and the battery performance parameter according to the first standard SOC, and obtain and display the battery performance parameter corresponding to the first standard SOC.
Further, in a possible implementation manner of the embodiment of the present invention, as shown in fig. 6, on the basis of the embodiment shown in fig. 5, the first obtaining module 510 includes:
the obtaining submodule 511 is configured to obtain a first rated capacity corresponding to a highest rated voltage of the battery and a second rated capacity corresponding to a lowest rated voltage of the battery.
And the test submodule 512 is used for testing and acquiring a first available capacity corresponding to the highest working voltage of the battery during working and a second available capacity corresponding to the lowest working voltage of the battery.
The establishing submodule 513 is configured to establish a first mapping relationship based on the first rated capacity and the first available capacity, and the second rated capacity and the second available capacity.
Specifically, the establishing sub-module 513 includes:
a first acquiring unit 5131 for acquiring the second standard SOC when the display SOC display battery is fully charged, based on the first rated capacity and the first available capacity.
Specifically, the first obtaining unit 5131 is configured to obtain a difference between the first rated capacity and the first available capacity, and a first ratio of the difference to the first rated capacity; and the maximum display value of the SOC display battery when the battery is fully charged is differentiated from the first ratio to obtain a second standard SOC.
A second obtaining unit 5132, configured to obtain a third standard SOC when the display SOC display battery is completely discharged, according to the second rated capacity, the second available capacity, and the second standard SOC.
Specifically, the second obtaining unit 5132 is configured to obtain a second ratio of the second rated capacity to the second available capacity; and subtracting the second ratio from the second standard SOC to obtain a third standard SOC.
The establishing unit 5133 is configured to establish a first mapping relationship according to the second standard SOC and the third standard SOC.
Specifically, the establishing unit 5133 is configured to, for each display value of the display SOCs, make a difference between the second standard SOC and the third standard SOC to obtain a first numerical value; multiplying the first value by the display value to obtain a second value; adding the second numerical value and the third standard SOC to obtain an actual value corresponding to the display value; wherein the actual value is indicative of an actual remaining SOC of the battery; and establishing a first mapping relation by using the acquired display value and the actual value corresponding to the display value.
In a possible implementation manner of the embodiment of the present invention, as shown in fig. 7, on the basis of the embodiment shown in fig. 5, the first obtaining module 510 includes:
the first acquiring unit 521 is configured to acquire a first open-circuit voltage corresponding to a highest working voltage of the battery during operation; and acquiring a second open-circuit voltage corresponding to the lowest working voltage of the battery during working.
A second obtaining unit 522, configured to query a correspondence between the open-circuit voltage and the standard SOC according to the first open-circuit voltage, and obtain a second standard SOC corresponding to the first open-circuit voltage; and inquiring the corresponding relation between the open-circuit voltage and the standard SOC according to the second open-circuit voltage, and acquiring a third standard SOC corresponding to the second open-circuit voltage.
The establishing unit 523 is configured to establish a first mapping relationship according to the second standard SOC and the third standard SOC.
Specifically, the establishing unit 523 is configured to perform a difference between the second standard SOC and the third standard SOC for each display value of the display SOC to obtain a first numerical value; multiplying the first value by the display value to obtain a second value; adding the second numerical value and the third standard SOC to obtain an actual value corresponding to the display value; wherein the actual value is indicative of an actual remaining SOC of the battery; and establishing a first mapping relation by using the acquired display value and the actual value corresponding to the display value.
It should be noted that the foregoing explanation of the embodiment of the battery performance parameter obtaining method is also applicable to the battery performance parameter obtaining apparatus of the embodiment, and the implementation principle is similar, and is not repeated here.
The battery performance parameter acquiring device of the embodiment acquires a first mapping relation between a standard state of charge (SOC) and a display SOC, acquires a first display SOC currently displayed on a screen, acquires a first standard SOC corresponding to the first display SOC according to the first display SOC and the first mapping relation, further inquires a second mapping relation between the standard SOC and a battery performance parameter according to the first standard SOC, and acquires and displays the battery performance parameter corresponding to the first standard SOC. The method realizes the mapping of the battery performance parameters of the standard test to the performance parameters of different use intervals by establishing the corresponding relation between the standard SOC and the display SOC, can fully utilize the tested data under the condition of carrying out the performance parameter test once according to the standard test condition, realizes the flexible calculation of the SOC related performance parameters, avoids the retest aiming at different use intervals, reduces the consumption of test resources, and solves the technical problem that the performance parameters are greatly consumed by retesting each time the change of the available capacity window in the prior art.
In order to implement the above embodiments, the present invention further provides a computer device.
Fig. 8 is a schematic structural diagram of a computer device according to an embodiment of the present invention. As shown in fig. 8, the computer device 80 includes: a memory 801, a processor 802 and a computer program 803 stored on the memory 801 and operable on the processor 802, when executing the computer program 803, implementing the battery performance parameter obtaining method as described in the previous embodiments.
In order to implement the above embodiments, the present invention also proposes a non-transitory computer-readable storage medium on which a computer program is stored, which when executed by a processor implements the battery performance parameter acquisition method as described in the foregoing embodiments.
In order to implement the foregoing embodiments, the present invention further provides a computer program product, wherein when the instructions in the computer program product are executed by a processor, the method for obtaining battery performance parameters as described in the foregoing embodiments is implemented.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A battery performance parameter acquisition method is characterized by comprising the following steps:
acquiring a first mapping relation between a standard SOC and a display SOC; wherein the standard SOC is an SOC defined based on a rated capacity of a battery and used for representing the current actual remaining SOC of the battery, and the display SOC is an SOC displayed on a display screen and used for representing the current remaining SOC of the battery;
acquiring a first display SOC currently displayed on a screen;
acquiring a first standard SOC corresponding to the first display SOC according to the first display SOC and the first mapping relation;
and inquiring a second mapping relation between the standard SOC and the battery performance parameters according to the first standard SOC, and acquiring and displaying the battery performance parameters corresponding to the first standard SOC.
2. The method of claim 1, wherein obtaining the first mapping between the standard SOC and the display SOC comprises:
acquiring a first rated capacity corresponding to the highest rated voltage of the battery and a second rated capacity corresponding to the lowest rated voltage of the battery;
testing and acquiring a first available capacity corresponding to the highest working voltage of the battery during working and a second available capacity corresponding to the lowest working voltage;
and establishing the first mapping relation according to the first rated capacity and the first available capacity, and the second rated capacity and the second available capacity.
3. The method of claim 2, wherein establishing the first mapping relationship based on the first rated capacity and the first available capacity, and the second rated capacity and the second available capacity comprises:
acquiring a second standard SOC when the display SOC displays the full charge of the battery according to the first rated capacity and the first available capacity;
acquiring a third standard SOC when the display SOC displays the battery to be completely discharged according to the second rated capacity, the second available capacity and the second standard SOC;
and establishing the first mapping relation according to the second standard SOC and the third standard SOC.
4. The method of claim 3, wherein said obtaining a second standard SOC at which said display SOC displays said battery full charge based on said first rated capacity and said first available capacity comprises:
obtaining a difference between the first rated capacity and the first available capacity, and a first ratio of the difference to the first rated capacity;
and displaying the maximum display value of the battery when the battery is fully charged on the display SOC and the first ratio to obtain the second standard SOC.
5. The method according to claim 4, wherein said obtaining a third standard SOC at which the display SOC displays the battery in a fully discharged state, based on the second rated capacity, the second available capacity, and the second standard SOC, comprises:
obtaining a second ratio of the second rated capacity to the second available capacity;
and subtracting the second ratio from the second standard SOC to obtain the third standard SOC.
6. The method of claim 1, wherein obtaining the first mapping between the standard SOC and the display SOC comprises:
acquiring a first open-circuit voltage corresponding to the highest working voltage of the battery during working;
inquiring the corresponding relation between the open-circuit voltage and a standard SOC according to the first open-circuit voltage, and acquiring a second standard SOC corresponding to the first open-circuit voltage;
acquiring a second open-circuit voltage corresponding to the lowest working voltage of the battery during working;
inquiring the corresponding relation between the open-circuit voltage and the standard SOC according to the second open-circuit voltage, and acquiring a third standard SOC corresponding to the second open-circuit voltage;
and establishing the first mapping relation according to the second standard SOC and the third standard SOC.
7. The method according to any of claims 3-6, wherein said establishing said first mapping relationship according to said second standard SOC and said third standard SOC comprises:
for each display value of the display SOC, making a difference value between the second standard SOC and the third standard SOC to obtain a first numerical value;
multiplying the first value by the display value to obtain a second value;
adding the second numerical value and the third standard SOC to obtain an actual value corresponding to the display value; wherein the actual value is indicative of an actual remaining SOC of the battery;
and establishing the first mapping relation by using the acquired display value and the actual value corresponding to the display value.
8. A battery performance parameter acquisition apparatus, comprising:
the first obtaining module is used for obtaining a first mapping relation between the standard SOC and the display SOC; wherein the standard SOC is an SOC defined based on a rated capacity of a battery and used for representing the current actual remaining SOC of the battery, and the display SOC is an SOC displayed on a display screen and used for representing the current remaining SOC of the battery;
the second acquisition module is used for acquiring a first display SOC currently displayed on a screen;
a third obtaining module, configured to obtain a first standard SOC corresponding to the first display SOC according to the first display SOC and the first mapping relationship;
and the query acquisition module is used for querying a second mapping relation between the standard SOC and the battery performance parameters according to the first standard SOC, acquiring and displaying the battery performance parameters corresponding to the first standard SOC.
9. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the battery performance parameter acquisition method according to any one of claims 1 to 7 when executing the computer program.
10. A non-transitory computer-readable storage medium having stored thereon a computer program, wherein the program is executed by a processor to implement the battery performance parameter acquisition method according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810031023.7A CN108594121B (en) | 2018-01-12 | 2018-01-12 | Battery performance parameter obtaining method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810031023.7A CN108594121B (en) | 2018-01-12 | 2018-01-12 | Battery performance parameter obtaining method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108594121A CN108594121A (en) | 2018-09-28 |
| CN108594121B true CN108594121B (en) | 2021-09-07 |
Family
ID=63608166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810031023.7A Active CN108594121B (en) | 2018-01-12 | 2018-01-12 | Battery performance parameter obtaining method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108594121B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111038487B (en) * | 2019-12-19 | 2021-03-26 | 浙江吉利新能源商用车集团有限公司 | Battery electric quantity control method and control system of hybrid power vehicle |
| CN112213652B (en) * | 2020-01-20 | 2023-06-13 | 蜂巢能源科技有限公司 | Method and system for estimating residual electric quantity |
| CN112114258B (en) * | 2020-09-03 | 2023-11-03 | 北京现代汽车有限公司 | Method and device for estimating available capacity of power battery, medium and equipment |
| CN114062950B (en) * | 2021-11-16 | 2023-07-07 | 蜂巢能源科技有限公司 | Method and device for determining SOC of series-parallel battery, electronic equipment and storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914745A (en) * | 2012-07-02 | 2013-02-06 | 北京工业大学 | Method for evaluating performance states of automotive power batteries |
| CN104931882A (en) * | 2014-03-21 | 2015-09-23 | 比亚迪股份有限公司 | Power battery capacity correction method and apparatus |
| CN106501730A (en) * | 2016-12-06 | 2017-03-15 | 歌尔科技有限公司 | A kind of battery electric quantity processing method and equipment |
| CN106603874A (en) * | 2017-02-27 | 2017-04-26 | 维沃移动通信有限公司 | Mobile terminal electric quantity display method and mobile terminal |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140350877A1 (en) * | 2013-05-25 | 2014-11-27 | North Carolina State University | Battery parameters, state of charge (soc), and state of health (soh) co-estimation |
-
2018
- 2018-01-12 CN CN201810031023.7A patent/CN108594121B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914745A (en) * | 2012-07-02 | 2013-02-06 | 北京工业大学 | Method for evaluating performance states of automotive power batteries |
| CN104931882A (en) * | 2014-03-21 | 2015-09-23 | 比亚迪股份有限公司 | Power battery capacity correction method and apparatus |
| CN106501730A (en) * | 2016-12-06 | 2017-03-15 | 歌尔科技有限公司 | A kind of battery electric quantity processing method and equipment |
| CN106603874A (en) * | 2017-02-27 | 2017-04-26 | 维沃移动通信有限公司 | Mobile terminal electric quantity display method and mobile terminal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108594121A (en) | 2018-09-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108594121B (en) | Battery performance parameter obtaining method and device | |
| CN106329021B (en) | Method and device for estimating remaining available energy of power battery | |
| US10753977B2 (en) | Method and device for estimating discharge power of secondary battery | |
| US10670664B2 (en) | Method for determining resistance factor of secondary battery, and apparatus and method for estimating charge power using determined resistance factor | |
| US11214168B2 (en) | Deterioration state computation method and deterioration state computation device | |
| EP3011351B1 (en) | Method for estimating state of health of a battery in a hybrid vehicle | |
| US9205750B2 (en) | Method to estimate battery open-circuit voltage based on transient resistive effects | |
| KR101750739B1 (en) | Device for measuring state of charge of secondary battery and method for measuring state of charge of secondary battery | |
| EP2711727B1 (en) | Battery condition estimation device and method of generating open circuit voltage characteristic | |
| Kim et al. | Analytical study on low-frequency ripple effect of battery charging | |
| DE102015110902A1 (en) | A method of determining battery cell voltage relaxation time based on cell usage history and temperature | |
| CN104569828B (en) | Method and device for determining the battery state of a vehicle battery in a vehicle | |
| KR102024298B1 (en) | Method for estimating the state of health of an electrochemical cell for storing electrical energy | |
| Steinstraeter et al. | Influence of pulse width modulated auxiliary consumers on battery aging in electric vehicles | |
| CN113484783B (en) | Battery SOH detection method, device, system, medium and program product | |
| WO2021150551A1 (en) | System and method for estimating battery state of health | |
| US20220385095A1 (en) | Fast Charging Method | |
| Rogge et al. | Fast charging of battery buses and its impact on the aging of various lithium-ion cell types | |
| JP2000340268A (en) | Electronic device and management method for battery | |
| Aneiros et al. | A proposed mathematical model for discharge curves of Li-Ion batteries | |
| Bacci et al. | Aging models for high capacity LiFePO 4 cells | |
| US11604227B2 (en) | Method and control device for impedance-based determination of a state of charge of at least one battery cell and motor vehicle | |
| CN113945849B (en) | SOC value calculation method in charging process of lead-acid storage battery, storage battery and electric appliance | |
| WO2022176317A1 (en) | Secondary battery control device | |
| KR100285490B1 (en) | Method for measuring residual capacity of battery in electric vehicle |
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 |