Battery performance test data analysis method, system, equipment and medium

Abstract

The invention discloses a battery performance test data analysis method, system and device and a medium, and relates to the technical field of data processing, and the method comprises the steps: obtaining a working voltage range, and obtaining a first voltage value and a second voltage value; acquiring a power supply voltage variable quantity, acquiring a maximum battery voltage and a minimum battery voltage of the tested battery in the ith fluctuation period, acquiring a battery voltage variable quantity in the ith fluctuation period, and acquiring a first performance index; acquiring a first maximum time point and a first minimum time point, acquiring a first response delay, acquiring a second response delay, and acquiring a second performance index of the tested battery in the ith fluctuation period based on a second calculation model, the first response delay and the second response delay; and obtaining a parameter threshold, and obtaining a performance test result of the tested battery according to the to-be-compared parameters and the parameter threshold. The method has the advantages of being good in test effect, accurate, reliable and stable in test.

Description

Technical Field

[0001] The present invention relates to the field of data processing technology, and in particular to a battery performance test data analysis method, system, equipment and medium. Background Art

[0002] With the continuous development of battery technology, batteries play an increasingly important role in various electronic devices, electric vehicles and energy storage systems. However, the performance of batteries is directly related to the operating efficiency, endurance and safety of the equipment. Therefore, accurate testing and evaluation of battery performance is particularly important. In practical applications, batteries often need to work under changing voltage or current conditions, such as acceleration, deceleration, climbing and other working conditions of electric vehicles during driving, which will have a significant impact on the performance of batteries. Traditional battery performance testing methods often focus on the static characteristics of batteries, such as capacity, internal resistance, etc., but ignore the performance of batteries under dynamic working conditions. In order to more comprehensively evaluate battery performance, it is necessary to pass the response characteristics of batteries under dynamic charging working conditions. However, the current battery performance testing methods are often difficult to accurately capture and analyze these dynamic changes, resulting in an incomplete and inaccurate evaluation of battery performance; in addition, in the process of battery performance testing, the existing technology cannot effectively extract and analyze key performance indicators, and thus cannot reflect the performance of batteries under dynamic working conditions.

[0003] In view of the above problems, technical personnel in this field need to propose a new battery performance test data analysis method that can more comprehensively evaluate the performance of the battery under dynamic conditions and provide strong technical support for the research and development, production and application of the battery. Summary of the invention

[0004] In view of the defects in the prior art, the present invention provides a battery performance test data analysis method, system, device and medium.

[0005] A battery performance test data analysis method includes: obtaining an operating voltage range of a tested battery, and obtaining a first voltage value and a second voltage value within the operating voltage range, wherein the first voltage value is less than the second voltage value; setting a charging test circuit of the tested battery and placing the tested battery in a charging state, and setting a power supply voltage of the charging test circuit to periodically fluctuate between the first voltage value and the second voltage value, and obtaining a power supply voltage variation according to the first voltage value and the second voltage value, and obtaining a maximum battery voltage and a minimum battery voltage of the tested battery within an i-th fluctuation period, and obtaining a battery voltage variation within an i-th fluctuation period according to the maximum battery voltage and the minimum battery voltage, and obtaining a battery voltage variation within an i-th fluctuation period based on a first calculation model, a power supply voltage variation, and a battery voltage variation within an i-th fluctuation period. A first performance indicator of the test battery; obtaining a first maximum time point and a first minimum time point corresponding to the maximum battery voltage and the minimum battery voltage in the i-th fluctuation period, and obtaining a second maximum time point and a second minimum time point corresponding to the first voltage value and the second voltage value in the i-th fluctuation period, and obtaining a first response delay according to the first maximum time point and the second maximum time point, and obtaining a second response delay according to the first minimum time point and the second minimum time point, and obtaining a second performance indicator of the tested battery in the i-th fluctuation period based on the second calculation model, the first response delay and the second response delay; obtaining a parameter to be compared according to the first performance indicator and the second performance indicator, and obtaining a parameter threshold according to the operating voltage range, the first voltage value and the second voltage value, and obtaining a performance test result of the tested battery according to the parameter to be compared and the parameter threshold.

[0006] Optionally, obtaining a performance test result of the tested battery based on the parameter to be compared and the parameter threshold includes: if the parameter to be compared exceeds the parameter threshold, the performance of the tested battery meets the use requirements of the working voltage range, and outputs a performance test result including a first performance indicator and a second performance indicator, and obtains a test time corresponding to the performance test result based on the i-th fluctuation cycle; if the parameter to be compared does not exceed the parameter threshold, the performance of the tested battery does not meet the use requirements of the working voltage range, and is retested with the j-th fluctuation cycle, where j is not equal to i.

[0007] Optionally, obtaining the parameter to be compared according to the first performance indicator and the second performance indicator includes: taking a smaller value of the first performance indicator and the second performance indicator as the parameter to be compared.

[0008] Optionally, obtaining the parameter to be compared according to the first performance indicator and the second performance indicator includes: obtaining a voltage weight and a delay weight, and obtaining the parameter to be compared according to the voltage weight, the delay weight, the first performance indicator and the second performance indicator.

[0009] Optionally, the parameter threshold is obtained according to the operating voltage range, the first voltage value, and the second voltage value as follows: Among them, P th is the parameter threshold, V 2 is the second voltage value, V 1 is the first voltage value, V max is the maximum operating voltage, V min is the minimum operating voltage.

[0010] Optionally, the first calculation model in obtaining the first performance indicator of the tested battery in the i-th fluctuation period based on the first calculation model, the power supply voltage change and the battery voltage change in the i-th fluctuation period is expressed as: Among them, P i1 is the first performance index of the tested battery in the ith fluctuation cycle, ΔV ib is the battery voltage change during the ith fluctuation period, ΔV p is the power supply voltage variation.

[0011] Optionally, the second calculation model in obtaining the second performance indicator of the tested battery in the i-th fluctuation period based on the second calculation model, the first response delay and the second response delay is expressed as: Among them, P i2 is the second performance index of the tested battery in the ith fluctuation cycle, ΔT i1 is the first response delay in the ith fluctuation period, ΔT i2 is the second response delay in the i-th fluctuation period, and α is the unit coefficient.

[0012] A battery performance test data analysis system is also provided, the system comprising: an acquisition module, used to acquire the working voltage range of the tested battery, and acquire a first voltage value and a second voltage value within the working voltage range, wherein the first voltage value is less than the second voltage value; a first data analysis module, used to set a charging test circuit of the tested battery and put the tested battery in a charging state, and set the power supply voltage of the charging test circuit to fluctuate periodically between the first voltage value and the second voltage value, and acquire a power supply voltage change according to the first voltage value and the second voltage value, and acquire a maximum battery voltage and a minimum battery voltage of the tested battery within the ith fluctuation period, and acquire a battery voltage change within the ith fluctuation period according to the maximum battery voltage and the minimum battery voltage, and acquire the ith fluctuation period based on the first calculation model, the power supply voltage change, and the battery voltage change within the ith fluctuation period a first performance indicator of the tested battery; a second data analysis module, used to obtain a first maximum time point and a first minimum time point corresponding to the maximum battery voltage and the minimum battery voltage in the i-th fluctuation period, and obtain a second maximum time point and a second minimum time point corresponding to the first voltage value and the second voltage value in the i-th fluctuation period, and obtain a first response delay according to the first maximum time point and the second maximum time point, and obtain a second response delay according to the first minimum time point and the second minimum time point, and obtain a second performance indicator of the tested battery in the i-th fluctuation period based on the second calculation model, the first response delay and the second response delay; an analysis and comparison module, used to obtain a parameter to be compared according to the first performance indicator and the second performance indicator, and obtain a parameter threshold according to the operating voltage range, the first voltage value and the second voltage value, and obtain a performance test result of the tested battery according to the parameter to be compared and the parameter threshold.

[0013] An electronic device is also provided, comprising: a memory on which a computer program is stored; and a processor for executing the computer program in the memory to implement the above-mentioned battery performance test data analysis method.

[0014] A non-temporary computer-readable storage medium is also provided, on which a computer program is stored, and when the program is executed by a processor, the above-mentioned battery performance test data analysis method is implemented.

[0015] The beneficial effects of the present invention are embodied in:

[0016] In the entire battery performance test data analysis method, by obtaining the battery's operating voltage range and specific voltage value, setting a charging test circuit to test the battery under dynamic voltage fluctuations that simulate actual working conditions, not only the first performance indicator reflecting the battery voltage response characteristics is calculated, but also the battery's response speed to power supply voltage changes is deeply analyzed to obtain the second performance indicator. Then, by combining these two performance indicators, the parameters to be compared are obtained and compared with the parameter thresholds set based on the battery design specifications and test conditions. The performance of the battery under dynamic charging working conditions is comprehensively evaluated, thereby improving the accuracy and comprehensiveness of the battery performance test, and providing strong data support for battery design, optimization and practical application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0018] Figure 1 A schematic diagram of the steps of the battery performance test data analysis method of the present invention;

[0019] Figure 2 A schematic diagram of a part of the steps of S4 in the battery performance test data analysis method of the present invention;

[0020] Figure 3 The present invention is a block diagram of an electronic device according to an embodiment of the present invention.

[0021] Reference numerals:

[0022] 700 - electronic device, 701 - processor, 702 - memory, 703 - multimedia component, 704 - input / output (I / O) interface, 705 - communication component. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0026] like Figure 1 As shown, a battery performance test data analysis method is provided, comprising:

[0027] S1. Obtaining an operating voltage range of a tested battery, and obtaining a first voltage value and a second voltage value within the operating voltage range, wherein the first voltage value is less than the second voltage value;

[0028] S2, setting a charging test circuit of the tested battery and putting the tested battery in a charging state, and setting the power supply voltage of the charging test circuit to fluctuate periodically between a first voltage value and a second voltage value, and obtaining a power supply voltage variation according to the first voltage value and the second voltage value, and obtaining a maximum battery voltage and a minimum battery voltage of the tested battery in the ith fluctuation period, and obtaining a battery voltage variation in the ith fluctuation period according to the maximum battery voltage and the minimum battery voltage, and obtaining a first performance indicator of the tested battery in the ith fluctuation period based on the first calculation model, the power supply voltage variation and the battery voltage variation in the ith fluctuation period;

[0029] S3, obtaining a first maximum time point and a first minimum time point corresponding to the maximum battery voltage and the minimum battery voltage in the i-th fluctuation period, and obtaining a second maximum time point and a second minimum time point corresponding to the first voltage value and the second voltage value in the i-th fluctuation period, and obtaining a first response delay according to the first maximum time point and the second maximum time point, and obtaining a second response delay according to the first minimum time point and the second minimum time point, and obtaining a second performance indicator of the tested battery in the i-th fluctuation period based on the second calculation model, the first response delay and the second response delay;

[0030] S4. Obtain a parameter to be compared according to the first performance indicator and the second performance indicator, obtain a parameter threshold according to the operating voltage range, the first voltage value and the second voltage value, and obtain a performance test result of the tested battery according to the parameter to be compared and the parameter threshold.

[0031] In this embodiment, it should be noted that in S1, in the S1 step of the battery performance test data analysis method, it is first necessary to obtain the operating voltage range of the tested battery. This operating voltage range is the voltage variation interval that the battery can withstand during normal operation, and is a basic parameter for battery design and application. In order to more accurately simulate the dynamic changes of the battery in actual work, it is not only satisfied with obtaining the extreme values ​​of this range, but also further selects two specific voltage values ​​within this range: a first voltage value and a second voltage value. Of these two voltage values, the first voltage value is less than the second voltage value, and they represent a lower point and a higher point of the battery in the operating voltage range, respectively. Such a selection enables the voltage changes that the battery may encounter in actual work to be simulated by periodically fluctuating between these two voltage values ​​in subsequent tests, so the voltage changes are based on these two voltage values.

[0032] For example, assume that the operating voltage range of the tested battery is 30V to 40V. Within this range, 32V can be selected as the first voltage value and 38V as the second voltage value. These two voltage values ​​are both within the operating voltage range and representative, and can better reflect the voltage changes of the battery in actual operation. Through such a setting, a clear voltage fluctuation range can be provided for the design of the subsequent charging test circuit, thereby more accurately evaluating the performance of the battery under dynamic charging working conditions.

[0033] In S2, the charging test circuit of the tested battery is first set up, and the battery is ensured to be in a charging state. This is to simulate the charging scenario of the battery in actual application, so as to more accurately evaluate its performance under dynamic charging conditions. Next, the power supply voltage of the charging test circuit is set to fluctuate periodically between the first voltage value and the second voltage value. This setting is key because it can simulate the voltage change fluctuations that the battery may encounter in actual work. By obtaining the first voltage value and the second voltage value, the power supply voltage change can be calculated, which is the basis for the subsequent analysis of the battery response characteristics. During the charging process, the maximum battery voltage and the minimum battery voltage of the tested battery in the i-th fluctuation cycle are monitored and recorded in real time. These two voltage values ​​reflect the voltage variation range of the battery in the voltage fluctuation cycle. By comparing the maximum battery voltage and the minimum battery voltage, the battery voltage change in the i-th fluctuation cycle can be obtained. Finally, based on the first calculation model, combined with the power supply voltage change and the battery voltage change, the first performance index of the tested battery in the i-th fluctuation cycle is calculated. This index can quantify the voltage response characteristics of the battery under dynamic charging conditions, and provide an important basis for the comprehensive evaluation of battery performance.

[0034] For example, it is assumed that the operating voltage range of the tested battery is 30V to 40V in S1, and 32V is selected as the first voltage value and 38V as the second voltage value. In S2, the power supply voltage of the charging test circuit is set to fluctuate periodically between 32V and 38V, and the fluctuation period can be set to 1 second or set according to actual needs. During the charging process, the battery voltage is monitored in real time, and the maximum battery voltage of 37.5V and the minimum battery voltage of 33.2V in a certain fluctuation period are recorded. By calculation, the battery voltage change in the fluctuation period is obtained to be 4.3V. At the same time, the power supply voltage change is also calculated to be 6V (i.e. 38V-32V). Finally, the first performance index of the fluctuation period is calculated by combining the power supply voltage change and the battery voltage change using the first calculation model. This index can intuitively reflect the voltage response performance of the battery under dynamic charging conditions. The larger this index is, the more fully the battery responds to the power supply voltage change, so that it can better adapt to the dynamic change conditions in actual work.

[0035] In S3, the response characteristics of the battery under dynamic charging conditions are further analyzed. First, the first maximum time point and the first minimum time point corresponding to the maximum battery voltage and the minimum battery voltage in the ith fluctuation cycle are obtained. These two time points represent the moments when the battery voltage reaches the highest value and the lowest value in the fluctuation cycle, respectively, and are key parameters for evaluating the battery voltage response speed. Next, the second maximum time point and the second minimum time point corresponding to the first voltage value and the second voltage value in the ith fluctuation cycle are obtained. These two time points reflect the moments when the power supply voltage reaches the set high voltage value and low voltage value in the fluctuation cycle. By comparing the first maximum time point and the second maximum time point, the first response delay can be calculated, that is, the time required for the battery voltage to rise from the power supply voltage to reach the maximum value. Similarly, by comparing the first minimum time point and the second minimum time point, the second response delay can be obtained, that is, the time required for the battery voltage to fall from the power supply voltage to reach the minimum value. These two response delay indicators can quantify the reaction speed of the battery to the change of the power supply voltage, and are important indicators for evaluating the dynamic performance of the battery. Finally, based on the second calculation model, combined with the first response delay and the second response delay, the second performance indicator of the tested battery of the ith fluctuation cycle is calculated. This indicator can comprehensively reflect the response characteristics of the battery under dynamic charging conditions, providing strong support for the comprehensive evaluation of battery performance.

[0036] For example, suppose that in a certain fluctuation cycle, it is monitored that the battery voltage reaches a maximum value of 37.5V at time t1 and a minimum value of 33.2V at time t2. At the same time, it is also recorded that the power supply voltage rises to 38V at time t3 and drops to 32V at time t4. By comparing these time points, it is possible to calculate that the first response delay is the time interval between t1 and t3, that is, the time required for the battery voltage to rise from the start of the power supply voltage to reach the maximum value. Similarly, the second response delay is the time interval between t2 and t4, that is, the time required for the battery voltage to drop from the start of the power supply voltage to reach the minimum value. Assume that the second calculation model is used to combine these two response delay indicators to calculate the second performance indicator of the fluctuation cycle. The larger this indicator is, the faster and more accurate the battery's response to changes in power supply voltage is, so that it can better adapt to the dynamic changing conditions in actual work.

[0037] In S4, the performance of the tested battery under dynamic charging working conditions is comprehensively evaluated according to the calculated first performance index and the second performance index. First, a parameter to be compared needs to be obtained according to the two performance indexes, and this parameter will be used as a basis for evaluating whether the battery performance meets the requirements of the working voltage range. The acquisition method of the parameter to be compared can be flexible and diverse, for example, a specific value of the first performance index and the second performance index can be directly taken, or the two can be combined to obtain a comprehensive value through a certain weight distribution. Next, a parameter threshold is set according to the working voltage range, the first voltage value and the second voltage value. This threshold is comprehensively determined based on the design specifications of the battery and the first voltage value and the second voltage value selected in the actual test, and is used to measure whether the performance of the battery under dynamic conditions meets expectations. Finally, the parameter to be compared is compared with the parameter threshold. If the parameter to be compared exceeds the parameter threshold, it means that the performance of the tested battery under dynamic charging conditions is good and meets the requirements of the working voltage range; on the contrary, if the parameter to be compared does not exceed the parameter threshold, it means that the battery performance needs to be improved and does not meet the current usage requirements.

[0038] For example, suppose that the first performance index of a battery calculated by S2 and S3 within a specific fluctuation period is 0.6, and the second performance index is 0.8. In step S4, a parameter to be compared can be calculated based on these two indicators, such as taking the smaller value of 0.6 as the parameter to be compared. Next, a parameter threshold is set according to the operating voltage range of the battery (such as 30V to 40V), the first voltage value (such as 32V) and the second voltage value (such as 38V), and it is assumed that this threshold is 0.55. Finally, the parameter to be compared 0.6 is compared with the parameter threshold 0.55. Since 0.6 is greater than 0.55, it can be concluded that the performance of the battery under dynamic charging conditions is good and meets the use requirements of the operating voltage range.

[0039] In summary, in the entire battery performance test data analysis method, by obtaining the operating voltage range and specific voltage value of the battery, setting the charging test circuit to test the battery under dynamic voltage fluctuations simulating actual working conditions, not only the first performance index reflecting the battery voltage response characteristics is calculated, but also the battery's response speed to power supply voltage changes is deeply analyzed to obtain the second performance index. Then, the parameters to be compared are obtained by combining these two performance indicators, and compared with the parameter thresholds set based on the battery design specifications and test conditions. The performance of the battery under dynamic charging working conditions is comprehensively evaluated, thereby improving the accuracy and comprehensiveness of the battery performance test, and providing strong data support for battery design, optimization and practical application.

[0040] like Figure 2 As shown, in one embodiment, obtaining the performance test result of the tested battery according to the parameter to be compared and the parameter threshold in S4 includes:

[0041] S41, if the parameter to be compared exceeds the parameter threshold, the performance of the tested battery meets the use requirements of the working voltage range, and a performance test result including the first performance indicator and the second performance indicator is output, and a test time corresponding to the performance test result is obtained according to the i-th fluctuation period;

[0042] S42. If the parameter to be compared does not exceed the parameter threshold, the performance of the tested battery does not meet the use requirements of the working voltage range, and the battery is retested with the jth fluctuation cycle, where j is not equal to i.

[0043] In this embodiment, it should be noted that in S41, when the parameter to be compared exceeds the parameter threshold, this indicates that the performance of the tested battery under dynamic charging conditions has reached the expected standard. Specifically, the parameter to be compared is a comprehensive value for evaluating battery performance obtained by combining the first performance index and the second performance index, and the parameter threshold is a standard value set based on the design specifications, operating voltage range and actual test conditions of the battery. When the parameter to be compared exceeds this threshold, it means that the response characteristics and speed of the battery under dynamic voltage fluctuations are good and can meet the application requirements in actual work. At this time, a complete performance test result including the first performance index and the second performance index will be output. These indicators specifically reflect the voltage response performance and response speed of the battery during the dynamic charging process. At the same time, the test duration corresponding to the performance test result will be recorded and output according to the i-th fluctuation cycle. This duration represents the time required for the battery to complete a complete performance test cycle under specific dynamic conditions, which provides an important reference for evaluating the performance stability and durability of the battery.

[0044] In S42, when the parameter to be compared does not exceed the parameter threshold, this means that the performance of the tested battery under dynamic charging conditions does not meet the expected standards. This may mean that the response characteristics or speed of the battery under dynamic voltage fluctuations are insufficient and cannot meet the application requirements in actual work. At this time, the performance test results will not be output directly, but the jth fluctuation cycle (where j is not equal to i) will be selected for retesting. The j here represents a new test cycle number, which means that the test conditions or parameter settings will be changed in an attempt to obtain more accurate performance test results. By retesting, the performance of the battery can be further verified, and it can be determined whether there are deviations in the results caused by accidental factors or test errors.

[0045] For example, suppose that in a certain test, the first performance index of the battery is calculated to be 0.55 and the second performance index is 0.6 through S2 and S3, and the parameter to be compared is calculated to be 0.55 based on these two indicators (such as taking the smaller value of the two or obtaining it through weight distribution). At the same time, according to the operating voltage range, the first voltage value and the second voltage value of the battery, the parameter threshold is set to 0.6. In this case, since the parameter to be compared 0.55 does not exceed the parameter threshold 0.6, it can be judged that the performance of the battery under dynamic charging conditions is poor and does not meet the use requirements of the operating voltage range. In order to obtain more accurate performance test results, the jth fluctuation period (such as j=i+1 or set according to actual needs) will be selected for retesting, and the fluctuation range, fluctuation period or other test parameters of the power supply voltage may be adjusted to try to obtain performance test results that are more in line with actual applications.

[0046] like Figure 2 As shown, in one embodiment, obtaining the parameter to be compared according to the first performance indicator and the second performance indicator in S4 includes:

[0047] S43: Use the smaller value of the first performance indicator and the second performance indicator as the parameter to be compared.

[0048] In this embodiment, it should be noted that in S43, in order to comprehensively evaluate the performance of the battery under dynamic charging conditions, it is necessary to obtain a parameter to be compared to compare with a preset parameter threshold. S43 proposes a specific method for obtaining the parameter to be compared, that is, selecting the smaller value of the first performance indicator and the second performance indicator as the parameter to be compared. This selection is based on the following considerations: In the dynamic performance evaluation of the battery, the first performance indicator and the second performance indicator respectively reflect the voltage response characteristics and response speed of the battery during the voltage fluctuation cycle, and both are important indicators for measuring battery performance. However, in practical applications, the performance of the battery is often limited by its weakest link, that is, the smaller value of the two indicators. Therefore, selecting a smaller value as the parameter to be compared can evaluate the performance of the battery more conservatively and strictly, and ensure that the battery can meet the minimum performance requirements under dynamic working conditions.

[0049] like Figure 2 As shown, in one embodiment, obtaining the parameter to be compared according to the first performance indicator and the second performance indicator in S4 includes:

[0050] S44, obtaining a voltage weight and a delay weight, and obtaining a parameter to be compared according to the voltage weight, the delay weight, the first performance indicator, and the second performance indicator.

[0051] In this embodiment, it should be noted that, in S44, the parameter to be compared is obtained according to the voltage weight, the delay weight, the first performance index and the second performance index, which can be expressed as: ic =θ·P i1 +ρ·P i2 ,θ+ρ=1,P ic is the parameter to be compared, θ is the voltage weight, ρ is the delay weight, P i1 is the first performance indicator, P i2 is the second performance indicator. Specifically, in order to more comprehensively evaluate the performance of the battery under dynamic charging conditions, S44 proposes a method for obtaining parameters to be compared based on voltage weights and delay weights. This method takes into account the different importance of the first performance indicator (reflecting the voltage response characteristics) and the second performance indicator (reflecting the response speed) in the battery performance evaluation. Specifically, it is first necessary to assign a reasonable weight to the voltage response characteristics and response speed respectively according to the actual application scenarios and requirements, namely, the voltage weight and the delay weight. These two weight values ​​represent the relative importance of each performance indicator in the comprehensive evaluation. Then, using these two weight values, combined with the first performance indicator and the second performance indicator, a comprehensive parameter to be compared is obtained through a certain calculation method (such as weighted average). This parameter to be compared takes into account both the voltage response characteristics and the response speed of the battery, and can more comprehensively reflect the performance of the battery under dynamic charging conditions.

[0052] Example improvement: Assume that in a certain battery performance test, through the calculation of S2 and S3, the first performance index is 0.7 (reflecting the voltage response characteristics), and the second performance index is 0.85 (reflecting the response speed). In step S44, according to the actual application scenario and requirements, a voltage weight of 0.6 is assigned to the voltage response characteristics, and a delay weight of 0.4 is assigned to the response speed. Then, using these two weight values, combined with the first performance index and the second performance index, the parameter to be compared is 0.7*0.6+0.85*0.4=0.76 through the weighted average calculation method. This parameter to be compared comprehensively considers the voltage response characteristics and response speed of the battery, and can more comprehensively reflect the performance of the battery under dynamic charging conditions.

[0053] In one embodiment, obtaining the parameter threshold according to the operating voltage range, the first voltage value and the second voltage value in S4 is expressed as:

[0054] in,

[0055] P th is the parameter threshold, V 2 is the second voltage value, V 1 is the first voltage value, V max is the maximum operating voltage, V min is the minimum operating voltage.

[0056] In this embodiment, it should be noted that the numerator V in the expression 2 -V 1 Indicates the fluctuation range of the power supply voltage during the test; the denominator V max -V min Represents the entire voltage range in which the battery can work normally; by calculating the ratio of these two ranges, a fluctuation ratio relative to the entire working voltage range of the battery can be obtained. This ratio (i.e., parameter threshold) is used to standardize the dynamic performance evaluation of the battery. It reflects the degree of voltage fluctuation that the battery can withstand within a given working voltage range. If the dynamic performance index of the battery (parameter to be compared) exceeds this ratio, it means that the battery performs well under dynamic conditions. The parameter threshold set in this way can ensure that the battery can maintain stable performance in actual applications even in the face of voltage fluctuations; at the same time, this setting takes into account the design specifications and actual working conditions of the battery, making the performance evaluation more in line with actual application needs.

[0057] Assume that the operating voltage range of the tested battery is 30V to 40V (V max =40V, V min =30V), the first voltage value selected during the test is 32V (V 1 =32V), the second voltage value is 38V (V2 =38V). Calculate the parameter threshold according to the expression:

[0058] Therefore, the parameter threshold of 0.6 means that under dynamic charging conditions, the performance index of the battery needs to reach or exceed this ratio before the battery performance can be considered to meet the requirements of use within the operating voltage range.

[0059] In one embodiment, the first calculation model in S2 for obtaining the first performance indicator of the tested battery in the i-th fluctuation period based on the first calculation model, the power supply voltage change, and the battery voltage change in the i-th fluctuation period is expressed as:

[0060] in,

[0061] P i1 is the first performance index of the tested battery in the ith fluctuation cycle, ΔV ib is the battery voltage change during the ith fluctuation period, ΔV p is the power supply voltage variation.

[0062] In this embodiment, it should be noted that log 2 (*) is used here to quantify the proportional relationship between the battery voltage change and the power supply voltage change, and can also fit the actual change state of the battery. When the battery voltage change is in a small range relative to the power supply voltage change, the first performance indicator P i1 The faster it grows, the more sensitive it is to the dynamic response characteristics of the battery. Partially ensures that ΔV ib Less than ΔV p , P i1 The result will not be negative or zero. The addition of 1 is equivalent to giving the ratio a reference value, so that when the battery voltage change is equal to the power supply voltage change, P i1 =log 2 (2) = 1, reflecting the optimal response capability of the battery under dynamic conditions.

[0063] In summary, this calculation process helps solve the problem of traditional battery performance testing methods ignoring performance under dynamic working conditions by quantifying the response of the battery voltage to changes in the power supply voltage. It can intuitively understand the voltage response characteristics of the battery under dynamic charging conditions, providing an important basis for comprehensively evaluating battery performance.

[0064] For example, based on the above implementation, ΔV ib =37.5-33.2=4.3, ΔV p =38-32=6, substitute it into the expression.

[0065]

[0066] In one embodiment, the second calculation model in obtaining the second performance indicator of the tested battery of the i-th fluctuation period based on the second calculation model, the first response delay and the second response delay in S3 is expressed as:

[0067] α>0; where

[0068] P i2 is the second performance index of the tested battery in the ith fluctuation cycle, ΔT i1 is the first response delay in the ith fluctuation period, ΔT i2 is the second response delay in the i-th fluctuation period, and α is the unit coefficient.

[0069] In this embodiment, it should be noted that under dynamic charging conditions, the response speed of the battery is a key performance indicator. Response delay ΔT i1 and ΔT i2 It directly reflects the reaction speed of the battery to the change of power supply voltage; by adding the rising and falling response delays, a comprehensive response delay index is obtained. The larger this index is, the slower the battery responds to the change of power supply voltage. Adding α (α>0) to the denominator is to avoid the situation where the denominator is zero and ensure that the second performance indicator is always defined; at the same time, the operation of adding α is equivalent to giving a reference value to the response delay, so that even if the response delay is very small, the second performance indicator will not be infinite. α is a coefficient used to adjust the scale of the second performance indicator. According to the actual application scenario and requirements, a suitable α value can be selected to make the second performance indicator meet the actual evaluation criteria. For example, if you want the second performance indicator to vary between 0 and 1, you can choose an appropriate α value to achieve this. The second performance indicator P i2 The larger the value, the faster the battery responds to changes in the power supply voltage. By comparing the second performance index of different batteries or under different test conditions, we can intuitively understand the response speed performance of the battery under dynamic charging conditions.

[0070] For example, based on the above implementation, the first response delay ΔT in the i-th fluctuation period is i1 =0.05s; the second response delay ΔT within the i-th fluctuation cycle i2 = 0.03s; if the unit is seconds (s), determine α = 1, if the unit is milliseconds (ms), determine α = 1000. Finally, substitute the expression,

[0071] A battery performance test data analysis system is also provided, the system comprising:

[0072] An acquisition module, used for acquiring an operating voltage range of the tested battery, and acquiring a first voltage value and a second voltage value within the operating voltage range, wherein the first voltage value is less than the second voltage value;

[0073] A first data analysis module, used for setting a charging test circuit of a tested battery and placing the tested battery in a charging state, and setting a power supply voltage of the charging test circuit to fluctuate periodically between a first voltage value and a second voltage value, and obtaining a power supply voltage variation according to the first voltage value and the second voltage value, and obtaining a maximum battery voltage and a minimum battery voltage of the tested battery in an i-th fluctuation period, and obtaining a battery voltage variation in an i-th fluctuation period according to the maximum battery voltage and the minimum battery voltage, and obtaining a first performance indicator of the tested battery in an i-th fluctuation period based on a first calculation model, the power supply voltage variation, and the battery voltage variation in an i-th fluctuation period;

[0074] A second data analysis module is used to obtain a first maximum time point and a first minimum time point corresponding to the maximum battery voltage and the minimum battery voltage in the i-th fluctuation period, and obtain a second maximum time point and a second minimum time point corresponding to the first voltage value and the second voltage value in the i-th fluctuation period, and obtain a first response delay according to the first maximum time point and the second maximum time point, and obtain a second response delay according to the first minimum time point and the second minimum time point, and obtain a second performance indicator of the tested battery in the i-th fluctuation period based on the second calculation model, the first response delay and the second response delay;

[0075] The analysis and comparison module is used to obtain the parameters to be compared according to the first performance indicator and the second performance indicator, and to obtain the parameter threshold according to the working voltage range, the first voltage value and the second voltage value, and to obtain the performance test result of the tested battery according to the parameters to be compared and the parameter threshold.

[0076] The analysis and comparison module is also used for: if the parameter to be compared exceeds the parameter threshold, the performance of the tested battery meets the use requirements of the working voltage range, and outputs the performance test results including the first performance indicator and the second performance indicator, and obtains the test time corresponding to the performance test result according to the i-th fluctuation cycle; if the parameter to be compared does not exceed the parameter threshold, the performance of the tested battery does not meet the use requirements of the working voltage range, and retests are performed with the j-th fluctuation cycle, where j is not equal to i.

[0077] The analysis and comparison module is also used to: use the smaller value of the first performance indicator and the second performance indicator as a parameter to be compared.

[0078] The analysis and comparison module is also used to: obtain voltage weight and delay weight, and obtain parameters to be compared according to the voltage weight, delay weight, first performance indicator and second performance indicator.

[0079] In this embodiment, it should be noted that, regarding the above-mentioned battery performance test data analysis system, the specific manner of performing operations therein has been described in detail in the embodiment of the battery performance test data analysis method, and will not be elaborated here.

[0080] Figure 3 is a block diagram of an electronic device showing a method for analyzing battery performance test data according to an exemplary embodiment. Figure 3 As shown, the electronic device 700 may include: a processor 701 and a memory 702. The electronic device 700 may also include one or more of a multimedia component 703, an input / output (I / O) interface 704, and a communication component 705.

[0081] The processor 701 is used to control the overall operation of the electronic device 700 to complete all or part of the steps in the above-mentioned battery performance test data analysis method. The memory 702 is used to store various types of data to support the operation of the electronic device 700, and these data may include instructions for any application or method used to operate on the electronic device 700, as well as application-related data, such as contact data, sent and received messages, pictures, audio, video, etc. The memory 702 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (Static Random Access Memory, referred to as SRAM), electrically erasable programmable read-only memory (Electrically Erasable Programmable Read-Only Memory, referred to as EEPROM), erasable programmable read-only memory (Erasable Programmable Read-Only Memory, referred to as EPROM), programmable read-only memory (Programmable Read-Only Memory, referred to as PROM), read-only memory (Read-Only Memory, referred to as ROM), magnetic memory, flash memory, magnetic disk or optical disk. The multimedia component 703 may include a screen and an audio component. The screen may be, for example, a touch screen, and the audio component is used to output and / or input audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signal may be further stored in the memory 702 or sent through the communication component 705. The audio component also includes at least one speaker for outputting audio signals. The I / O interface 704 provides an interface between the processor 701 and other interface modules, and the other interface modules may be keyboards, mice, buttons, etc. These buttons may be virtual buttons or physical buttons. The communication component 705 is used for wired or wireless communication between the electronic device 700 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G, 4G, NB-IOT, eMTC or other 5G, etc., or a combination of one or more of them, is not limited here. Therefore, the corresponding communication component 705 may include: Wi-Fi module, Bluetooth module, NFC module, etc.

[0082] In an exemplary embodiment, the electronic device 700 can be implemented by one or more application specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing devices (DSPD), programmable logic devices (PLD), field programmable gate arrays (FPGA), controllers, microcontrollers, microprocessors or other electronic components to execute the above-mentioned battery performance test data analysis method.

[0083] In another exemplary embodiment, a computer-readable storage medium including program instructions is also provided, and when the program instructions are executed by a processor, the steps of the above-mentioned battery performance test data analysis method are implemented. For example, the computer-readable storage medium can be the above-mentioned memory 702 including program instructions, and the above-mentioned program instructions can be executed by the processor 701 of the electronic device 700 to complete the above-mentioned battery performance test data analysis method.

[0084] In another exemplary embodiment, a computer program product is also provided. The computer program product includes a computer program that can be executed by a programmable device. The computer program has a code portion for executing the above-mentioned battery performance test data analysis method when executed by the programmable device.

[0085] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0086] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0087] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A battery performance test data analysis method, characterized in that: include: Acquire an operating voltage range of the tested battery, and acquire a first voltage value and a second voltage value within the operating voltage range, wherein the first voltage value is less than the second voltage value; Setting a charging test circuit for the tested battery and placing the tested battery in a charging state, and setting the power supply voltage of the charging test circuit to fluctuate periodically between a first voltage value and a second voltage value, and obtaining a power supply voltage variation according to the first voltage value and the second voltage value, and obtaining a maximum battery voltage and a minimum battery voltage of the tested battery in an i-th fluctuation period, and obtaining a battery voltage variation in an i-th fluctuation period according to the maximum battery voltage and the minimum battery voltage, and obtaining a first performance indicator of the tested battery in an i-th fluctuation period based on a first calculation model, the power supply voltage variation, and the battery voltage variation in an i-th fluctuation period; Obtain a first maximum time point and a first minimum time point corresponding to the maximum battery voltage and the minimum battery voltage in the i-th fluctuation period, and obtain a second maximum time point and a second minimum time point corresponding to the first voltage value and the second voltage value in the i-th fluctuation period, and obtain a first response delay according to the first maximum time point and the second maximum time point, and obtain a second response delay according to the first minimum time point and the second minimum time point, and obtain a second performance indicator of the tested battery in the i-th fluctuation period based on the second calculation model, the first response delay and the second response delay; The parameters to be compared are obtained according to the first performance indicator and the second performance indicator, and the parameter threshold is obtained according to the working voltage range, the first voltage value and the second voltage value. The performance test result of the tested battery is obtained according to the parameters to be compared and the parameter threshold.

2. The battery performance test data analysis method according to claim 1, characterized in that: The step of obtaining the performance test result of the tested battery according to the parameters to be compared and the parameter threshold comprises: If the parameter to be compared exceeds the parameter threshold, the performance of the tested battery meets the use requirements of the working voltage range, and a performance test result including the first performance indicator and the second performance indicator is output, and the test time corresponding to the performance test result is obtained according to the i-th fluctuation period; If the parameter to be compared does not exceed the parameter threshold, the performance of the tested battery does not meet the use requirements of the working voltage range, and the battery is retested with the jth fluctuation cycle, where j is not equal to i.

3. The battery performance test data analysis method according to claim 1, characterized in that: The obtaining of the parameter to be compared according to the first performance indicator and the second performance indicator comprises: The smaller value between the first performance index and the second performance index is used as the parameter to be compared.

4. The battery performance test data analysis method according to claim 1, characterized in that: The obtaining of the parameter to be compared according to the first performance indicator and the second performance indicator comprises: The voltage weight and the delay weight are obtained, and the parameters to be compared are obtained according to the voltage weight, the delay weight, the first performance indicator, and the second performance indicator.

5. The battery performance test data analysis method according to claim 1, characterized in that: The parameter threshold is obtained according to the working voltage range, the first voltage value and the second voltage value as follows: in, P th is the parameter threshold, V2 is the second voltage value, V1 is the first voltage value, V max is the maximum operating voltage, V min is the minimum operating voltage.

6. The battery performance test data analysis method according to claim 1, characterized in that: The first calculation model in obtaining the first performance indicator of the tested battery in the i-th fluctuation period based on the first calculation model, the power supply voltage change and the battery voltage change in the i-th fluctuation period is expressed as: in, P i1 is the first performance index of the tested battery in the ith fluctuation cycle, ΔV ib is the battery voltage change during the ith fluctuation period, ΔV p is the power supply voltage variation.

7. The battery performance test data analysis method according to claim 1, characterized in that: The second calculation model in obtaining the second performance indicator of the tested battery of the ith fluctuation period based on the second calculation model, the first response delay and the second response delay is expressed as: in, P i2 is the second performance index of the tested battery in the ith fluctuation cycle, ΔT i1 is the first response delay in the ith fluctuation period, ΔT i2 is the second response delay in the i-th fluctuation period, and α is the unit coefficient.

8. A battery performance test data analysis system, characterized in that: The system comprises: An acquisition module, used for acquiring an operating voltage range of the tested battery, and acquiring a first voltage value and a second voltage value within the operating voltage range, wherein the first voltage value is less than the second voltage value; A first data analysis module, used for setting a charging test circuit of a tested battery and placing the tested battery in a charging state, and setting a power supply voltage of the charging test circuit to fluctuate periodically between a first voltage value and a second voltage value, and obtaining a power supply voltage variation according to the first voltage value and the second voltage value, and obtaining a maximum battery voltage and a minimum battery voltage of the tested battery in an i-th fluctuation period, and obtaining a battery voltage variation in an i-th fluctuation period according to the maximum battery voltage and the minimum battery voltage, and obtaining a first performance indicator of the tested battery in an i-th fluctuation period based on a first calculation model, the power supply voltage variation, and the battery voltage variation in an i-th fluctuation period; A second data analysis module is used to obtain a first maximum time point and a first minimum time point corresponding to the maximum battery voltage and the minimum battery voltage in the i-th fluctuation period, and obtain a second maximum time point and a second minimum time point corresponding to the first voltage value and the second voltage value in the i-th fluctuation period, and obtain a first response delay according to the first maximum time point and the second maximum time point, and obtain a second response delay according to the first minimum time point and the second minimum time point, and obtain a second performance indicator of the tested battery in the i-th fluctuation period based on the second calculation model, the first response delay and the second response delay; The analysis and comparison module is used to obtain the parameters to be compared according to the first performance indicator and the second performance indicator, and to obtain the parameter threshold according to the working voltage range, the first voltage value and the second voltage value, and to obtain the performance test result of the tested battery according to the parameters to be compared and the parameter threshold.

9. An electronic device, characterized in that: include: a memory having a computer program stored thereon; A processor, configured to execute the computer program in the memory to implement the battery performance test data analysis method described in any one of claims 1 to 7.

10. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the battery performance test data analysis method described in any one of claims 1 to 7 is implemented.

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