Method and apparatus for generating voltage signal for battery testing

Abstract

A method (100) for generating a voltage signal used in a battery testing process includes: receiving an original voltage signal of a target object, which a battery will use to power the target object to perform its operation (110); classifying the original voltage signal into a substantially stable portion and a fluctuating portion (120); extracting features of the fluctuating portion (130); generating a preliminary voltage signal based on the extracted features of the fluctuating portion (140); and determining a voltage signal based on the preliminary voltage signal (150). The voltage signal thus generated can be freely and selectively generated according to test requirements and conforms to actual usage scenarios, and is suitable for battery testing.

Description

Technical Field

[0001] The present invention relates to battery testing, and in particular to a voltage signal used in battery testing. Background Art

[0002] Batteries are undoubtedly the core components of electric vehicles. During their design, production, use, and / or inspection, various tests are required to verify their reliability, robustness, and / or lifespan. The reliability, robustness, and / or lifespan of a battery are closely related to its intended use.

[0003] The target subject's driving conditions vary at different times, in different weather conditions, under different road conditions, and / or with different driving habits, resulting in different battery usage. To accurately test battery performance, especially battery life, it is necessary to obtain a simulated voltage signal that simulates the voltage signal of the battery during actual use for battery testing.

[0004] On the one hand, the simulated voltage signal needs to cover as many different driving conditions as possible. This can be achieved by monitoring the target object over a long period of time to obtain voltage signals covering various driving conditions, which can then be used for testing. However, the resulting voltage signals typically last for tens of hours, days, or even months, making them unsuitable for use in battery testing.

[0005] On the other hand, it's sometimes necessary to specifically study battery performance under certain driving conditions. However, obtaining a voltage signal of sufficient length for testing under these specific conditions can be difficult. While it's possible to obtain a voltage signal of sufficient length for testing through long-term monitoring, in practice, this long-term monitoring will inevitably also include voltage signals under other driving conditions, and extracting the voltage signal corresponding to that specific condition from the monitored voltage signal is time-consuming. Summary of the Invention

[0006] It is desirable to automatically generate an improved voltage signal suitable for battery testing. This voltage signal not only conforms to the voltage characteristics of the target object for which the battery is intended under actual usage scenarios, but can also be freely and selectively generated based on testing requirements. For example, for electric vehicles, based on battery testing requirements, on the one hand, voltage signals covering various driving conditions of the target object can be generated for battery testing; on the other hand, voltage signals under a specific driving condition can also be generated for battery testing.

[0007] According to one aspect, a method for generating a voltage signal used in a battery testing process is provided, the method comprising: receiving a raw voltage signal of a target object, the battery being used to power the target object to perform its operation; classifying the raw voltage signal into a substantially stable portion and a fluctuating portion; extracting one or more features of the fluctuating portion; generating a preliminary voltage signal based on the one or more features of the fluctuating portion; and determining the voltage signal based on the preliminary voltage signal.

[0008] According to another aspect, a device for generating a voltage signal used in a battery testing process is provided, the device comprising: a receiving unit that receives an original voltage signal of a target object, the battery being used to power the target object to perform its operation; and a processing unit that classifies the original voltage signal into a substantially stable portion and a fluctuating portion, extracts one or more features of the fluctuating portion, generates a preliminary voltage signal based on the one or more features of the fluctuating portion, and determines the voltage signal based on the preliminary voltage signal.

[0009] According to another aspect, a computer program product is provided, comprising computer program instructions, which, when executed, cause a processor to perform the method according to various embodiments of the present disclosure.

[0010] According to various embodiments of various aspects of the present disclosure, by extracting the characteristics of the original voltage signal, a test voltage signal for the battery is generated based on the extracted characteristics, so that the voltage signal for the test can be freely generated according to demand. At the same time, the generated voltage signal can retain the characteristics of the original voltage signal, thereby simulating the actual usage scenario of the battery to the greatest extent possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Embodiments are illustrated by way of example only and not by way of limitation in the figures of the accompanying drawings in which like references refer to similar elements.

[0012] Figure 1 shows an original voltage signal obtained from a target object to which a battery to be tested is applied during actual use according to one embodiment;

[0013] Figure 2 shows an original voltage signal obtained from a target object to which a battery to be tested is applied during actual use according to another embodiment;

[0014] Figure 3 A method for generating a voltage signal used in a battery testing process according to an embodiment of the present disclosure is shown;

[0015] Figure 4FIG. 4 shows a signal after filtering the original voltage signal according to another embodiment of the present disclosure;

[0016] Figure 5 An embodiment of the present disclosure is shown. Figure 2 Schematic diagram of segmenting the original voltage signal shown;

[0017] Figure 6 FIG. 1 shows a distribution diagram of a substantially stable portion in an original voltage signal according to an embodiment of the present disclosure;

[0018] Figure 7 A method for generating a voltage signal used in a battery testing process according to another embodiment of the present disclosure is shown;

[0019] Figure 8 A method for generating a voltage signal used in a battery testing process according to another embodiment of the present disclosure is shown;

[0020] Figure 9 A method for verifying a generated voltage signal according to one embodiment of the present disclosure is shown;

[0021] Figure 10 shows a first distribution of a generated voltage signal according to one embodiment of the present disclosure;

[0022] Figure 11 shows signals obtained by performing one of the conversion operations on two sub-distributions of the first distribution respectively according to one embodiment of the present disclosure;

[0023] Figure 12 A device for generating a voltage signal used in a battery testing process according to an embodiment of the present disclosure is shown;

[0024] Figure 13 A block diagram of an electronic device illustrating a method for generating a voltage signal used in a battery testing process according to an embodiment of the present disclosure is shown.

[0025] Various aspects and features of various embodiments of the present invention are described with reference to the accompanying drawings. The accompanying drawings are illustrative only and are not intended to be limiting. The size, shape, numbering, or appearance of the various elements in the accompanying drawings may vary without departing from the spirit of the present invention. Furthermore, not all parts of the apparatus of the embodiments of the present invention are labeled with reference numerals in the accompanying drawings. In some drawings, only relevant parts are labeled, and this does not limit the parts to those shown in the accompanying drawings. DETAILED DESCRIPTION

[0026] Although the following description is made with reference to an embodiment of an electric vehicle, it is understood that the battery is not limited to electric vehicles and can also refer to batteries used in other fields. Therefore, the "target object" to which the battery is applicable is not limited to electric vehicles.

[0027] In addition, in the description of the embodiment with reference to electric vehicles, driving conditions are used to describe various situations that may be involved in the use of the battery, such as different times, different weather, different road conditions and / or different driving habits. This is not restrictive. When the battery is applied to other fields, the performance of the battery will also change due to the different usage scenarios, and it may also be necessary to use a voltage signal to test the performance of the battery. Considering that fuel cells are more sensitive to voltage changes, even a small range of voltage changes has a greater impact on the life of the fuel cell. Therefore, it is more meaningful to use a voltage signal to test the fuel cell.

[0028] In order to accurately test the battery to be tested, it is necessary to simulate the actual usage scenario of the battery to be tested to operate the battery, so as to study its performance and / or life. By monitoring the target object to which the battery to be tested is applicable and obtaining its voltage signal under the actual usage scenario, a voltage signal for battery testing can be obtained. However, it is inappropriate to directly use the voltage signal obtained by such monitoring for battery testing. In order to accurately evaluate the performance of the battery, it is necessary to simulate as many usage scenarios of the target object as possible, thereby studying the performance of the battery. However, in actual use, obtaining the voltage signals under various usage scenarios requires long-term monitoring, and the monitored voltage signals are often very long and are not suitable for battery testing.

[0029] Furthermore, in some cases, it is necessary to study the battery's performance under specific usage scenarios. Extracting the voltage signal corresponding to a specific usage scenario from the voltage signals corresponding to multiple usage scenarios monitored during actual use is time-consuming. Furthermore, it is difficult to monitor the voltage signals during actual use for different specific usage scenarios before each test for battery testing.

[0030] Therefore, it is expected to automatically generate a voltage signal of a target object, which not only conforms to the characteristics of the voltage signal of the target object in a real usage scenario, but also meets the requirements of battery testing.

[0031] Figure 1 FIG. 1 shows a raw voltage signal obtained from a target object to which a battery to be tested is applied during actual use according to one embodiment. Figure 1 In particular, the figure shows the original voltage signal obtained from the electric vehicle. The horizontal axis represents time and the vertical axis represents voltage value. Figure 1It can be seen that during the actual use of electric vehicles, the battery voltage will change according to its driving conditions, among which there are stable voltage value parts (as shown by the arrows) and fluctuating parts. Figure 1 As shown in the figure, the voltage value in the stable voltage section is constant, which is an ideal situation. In the actual use of electric vehicles, the voltage value in this section may fluctuate slightly. In some application scenarios other than electric vehicles, such a fluctuation may not even occur. Figure 1 The voltage value shown is the stable part.

[0032] Figure 2 FIG. 1 shows an original voltage signal obtained from a target object to which the battery to be tested is applied during actual use according to another embodiment. Figure 2 The horizontal axis represents time, and the vertical axis represents voltage value. Figure 2 The voltage signal shown in FIG. 1 shows the portion of the original voltage signal that contains slight fluctuations (as indicated by the arrow). Figure 1 and Figure 2 In the two cases shown, the portion of the original voltage signal where the voltage value remains unchanged and where there are slight fluctuations is collectively referred to as a basically stable portion, and the portion of the original voltage signal other than the basically stable portion is referred to as a fluctuating portion.

[0033] According to various embodiments of the present disclosure, it is contemplated that a voltage signal for battery testing can be automatically generated based on a raw voltage signal from a target object. The generated voltage signal has similar or identical characteristics to the raw voltage signal and can meet the specific requirements of the battery test. Although the raw voltage signal is described with reference to the actual use of the target object for the battery to be tested, it is understood that this is not restrictive and that the raw voltage signal can also be obtained through simulation or a predetermined voltage signal whose characteristics have been proven to be suitable for the current test.

[0034] Figure 3 A method 100 for generating a voltage signal used in testing a battery is shown according to one embodiment of the present disclosure.

[0035] In step 110, the original voltage signal of the target object is received, and the battery to be tested will be used to power the target object to perform various operations of the target object. Figure 1 Or as shown in 2.

[0036] In step 120, the received original voltage signal is divided into a substantially stable portion and a fluctuating portion. By dividing the original voltage signal into the substantially stable portion and the fluctuating portion, the characteristics of the two portions can be studied separately.

[0037] In this step, it is possible to Figure 1 and 2 The portion indicated by the arrow is separated from the other portions, which can be achieved by known signal processing means.

[0038] To extract Figure 2 For the portion containing slight fluctuations shown, a low-pass filter can be applied to the original voltage signal to identify data points where the voltage difference between two adjacent points is less than a predetermined value, such as 0.00015 volts, as being substantially stable, i.e., extracting the portion where only slight fluctuations exist. It is also conceivable to apply a high-pass filter to the original voltage signal. Figure 4 FIG. 3 shows a signal after the original voltage signal is low-pass filtered, wherein the abscissa represents time and the ordinate represents voltage value.

[0039] It is expected that the substantially stable portion and the fluctuating portion each include a plurality of consecutive data points. Therefore, it is also conceivable to impose a constraint on the number of data points when extracting the substantially stable portion and the fluctuating portion from the original voltage signal. If the number of consecutive data points that meet a predetermined value is less than a predetermined number, the data points in that portion are removed from the extracted portion. For example, if only the voltage difference between the current data point and the previous data point is less than a predetermined value, and none of the adjacent data points before and after it meet the requirement that the voltage difference between the current data point and the previous data point is less than the predetermined value, the current data point is not recorded as a substantially stable portion.

[0040] Figure 5 An embodiment of the present disclosure is shown. Figure 2 The schematic diagram of segmenting the original voltage signal is shown in FIG. Figure 5 As shown, Figure 2 The raw voltage signal shown is first low-pass filtered to obtain a filtered voltage signal. This filtered voltage signal is then segmented into a substantially stable portion (lower right) and a fluctuating portion (lower left). For the substantially stable portion, its center amplitude and oscillation amplitude are recorded. Alternatively, the amplitude of each data point can be directly recorded.

[0041] After the original voltage signal is divided into a substantially stable portion and a fluctuating portion, the two portions can be processed separately.

[0042] According to method 100, the focus is on processing the fluctuating portion. In step 130, one or more features of the fluctuating portion are extracted. Before extracting features from the fluctuating portion in step 130, the fluctuating portion can be preprocessed to remove data points that are clearly artifact signals. For example, data points whose amplitudes clearly fall outside the voltage range likely involved in the target object's operation can be removed.

[0043] It is conceivable that the extracted features may involve the amplitude, rate of change, maximum value, and / or minimum value of the voltage. Those skilled in the art may select the features to be extracted based on actual conditions. In some embodiments, one or more features may include the value of a data point.

[0044] In one embodiment, the fluctuating portion is divided into a plurality of segments; a feature vector of each of the plurality of segments is extracted; the segments are clustered into one or more regions based on the feature vectors of the plurality of segments; and one or more features of each of the one or more regions are obtained. Thus, one or more segments having the same or similar feature vectors can be grouped together to form a region. The one or more features determined for each of the one or more regions of the fluctuating portion can also include the amplitude, rate of change, maximum value, minimum value, etc. of the voltage of the corresponding region. It can be envisioned that the one or more sets of feature vectors and one or more features mentioned in the present disclosure are described for different objects, and they can contain the same features or different features from each other.

[0045] In a further embodiment, the fluctuating portion is first preliminarily divided into multiple segments corresponding to each driving condition based on the driving condition. The driving condition can be pre-known or determined based on characteristics such as voltage values. Feature vector extraction and clustering processing as described above are then performed, thereby improving the accuracy of segmenting the fluctuating portion.

[0046] Next, in step 140, a preliminary voltage signal is generated based on the obtained features. The generated preliminary voltage signal should have characteristics identical or similar to the obtained features. The preliminary voltage signal is generated randomly. The features described herein may include, for example, the values ​​of the data points. In one embodiment, the preliminary voltage signal may be generated using a Markov chain. The length of the generated preliminary voltage signal may be designed based on the test requirements.

[0047] In one embodiment, if the fluctuation portion is not segmented or if the fluctuation portion is ultimately clustered into only one region, a preliminary voltage signal can be generated based on a single set of features for the entire fluctuation portion. If the entire fluctuation portion is classified into one region through clustering of the aforementioned multiple segments, the features of the entire fluctuation portion can be a set of feature vectors that are identical or similar across the various segments. In another embodiment, if multiple sets of features are obtained for multiple regions, a preliminary voltage signal can be generated for each set of features.

[0048] Finally, at step 150 , a voltage signal that can be used in a test process of the battery to be tested is determined based on the generated preliminary voltage signal.

[0049] When the preliminary voltage signal is generated based on only one set of features in step 140 , the preliminary voltage signal can be directly determined as the voltage signal for testing.

[0050] When corresponding preliminary voltage signals have been determined based on multiple sets of features in step 140, the preliminary voltage signals generated for each set of features can be combined to form a preliminary voltage signal for the entire fluctuation portion. The preliminary voltage signal thus generated covers all features involved in the original fluctuation portion. The preliminary voltage signal thus generated can be determined as the voltage signal for testing.

[0051] It is understood that the determination of the test voltage signal may vary depending on the battery testing requirements. Those skilled in the art can select preliminary voltage signals corresponding to one or more sets of features from the multiple feature groups (i.e., preliminary voltage signals corresponding to one or more specific regions within the fluctuating portion) as the test voltage signal. In one embodiment, each set of features may correspond to a driving condition, thereby allowing voltage signals tailored to one or more driving conditions to be selected for testing.

[0052] Although, in some cases, the preliminary voltage signal generated corresponding to the fluctuating portion can be selected as the voltage signal for battery testing, the preliminary voltage signal does not completely capture all the features of the original voltage signal, especially since the substantially stable portion of the original voltage signal is not added to the preliminary voltage signal.

[0053] It is desirable that the test voltage signal used when testing the battery be able to simulate all scenarios of the target object during actual use. Therefore, the previously segmented basically stable part can be added back to the preliminary voltage signal generated for the entire fluctuating part to obtain the final test voltage signal.

[0054] In one embodiment, first, the distribution of the segmented substantially stable portion in the original voltage signal is determined. Figure 6 FIG. 4 shows a diagram illustrating the distribution of a substantially stable portion in an original voltage signal according to an embodiment of the present disclosure.

[0055] like Figure 6 As shown in FIG, the horizontal axis represents the duration of each substantially stable portion (or the number of data points it lasts for), and the vertical axis represents the number of occurrences of the corresponding substantially stable portion. Figure 6 The graph shown can be obtained by histogram processing. For example, if the duration of a certain basically stable part is 5 seconds, it should fall into the following range: Figure 6 The range [1-28] is shown.

[0056] After determining the distribution of the substantially stable portion in the original voltage signal, the substantially stable portion can be combined with the preliminary voltage signal based on the distribution to determine the final voltage signal for testing. It is expected that the amplitude of the substantially stable portion does not change when combined with the preliminary voltage signal.

[0057] In one embodiment, the duration and / or location of the substantially stable portion added to the preliminary voltage signal can be determined based on its duration ratio and / or location in the original voltage signal, as well as the proportional relationship between the desired test voltage signal and the original voltage signal. Of course, it is also contemplated that the substantially stable portion can be added to any location in the preliminary voltage signal. This is sufficient as long as the distribution of the substantially stable portion in the generated voltage signal corresponds to the distribution of the substantially stable portion in the original voltage signal. Corresponding can mean that the two are identical or that they are in a certain ratio.

[0058] Although the above reference Figure 3-6 Some embodiments of the method disclosed herein have been described, but it is understood that this is not restrictive, and some of the steps may be deleted, modified, changed, and / or combined to achieve corresponding effects.

[0059] In a further embodiment, a verification step may be incorporated into the embodiment of the method according to the present disclosure to determine whether the generated voltage signal conforms to the characteristic distribution of the original voltage signal.

[0060] Figure 7 A method 200 for generating a voltage signal for use in testing a battery according to another embodiment of the present disclosure is shown. Steps 205 and 210 in method 200 are the same as steps 110 and 120 in method 100. In step 210, after the raw voltage signal is segmented into a substantially stable portion and a fluctuating portion, the fluctuating portion and the substantially stable portion are further processed in steps 215 and 245, respectively.

[0061] Specifically, in step 215, the fluctuating portion is divided into multiple segments. In one embodiment, the segmentation can be based on the driving conditions of the target object, but this is not limiting. The segmentation can also be based on a chronological order and a predetermined time length. In step 220, a set of feature vectors is extracted for each segment. Based on the feature vectors of each segment, the multiple segments are clustered into one or more regions each having the same or similar feature vectors. Then, in step 225, the characteristics of each region are obtained. Next, in step 230, a corresponding preliminary voltage signal is generated for each region based on its characteristics. If multiple sets of preliminary voltage signals corresponding to different regions are obtained, these sets of preliminary voltage signals are combined to generate a preliminary voltage signal corresponding to the entire fluctuating portion. In step 235, a first distribution of the preliminary voltage signal is determined. This first distribution can be obtained through histogram processing. In step 240, it is determined whether this first distribution conforms to a predetermined distribution for the fluctuating portion of the original voltage signal. The predetermined distribution for the fluctuating portion of the original voltage signal can be predetermined through histogram processing. Whether the first distribution conforms to the predetermined distribution can be determined by comparing the various features of the curve of the first distribution with the curve of the predetermined distribution.

[0062] If it is determined in step 240 that the first distribution conforms to the predetermined distribution, the method 200 proceeds to step 250. If it is determined in step 240 that the first distribution does not conform to the predetermined distribution, the method 200 proceeds to step 255, where the current preliminary voltage signal is discarded and not used for battery testing. Alternatively, a new preliminary voltage signal is generated.

[0063] Now returning to step 210, after the original voltage signal is divided into a substantially stable portion and a fluctuating portion in step 210, the substantially stable portion is further processed in step 245. In step 245, the distribution of the substantially stable portion in the original voltage signal is determined. Figure 6 The distribution diagram shown.

[0064] In step 250 , based on the distribution of the substantially stable portion in the original voltage signal, the substantially stable portion is combined with the preliminary voltage signal from step 240 , thereby generating a voltage signal that can be used for battery testing.

[0065] Figure 8 A method 300 for generating a voltage signal used in a battery test process according to another embodiment of the present disclosure is shown. The method 300 differs from the method 200 in that the substantially stable portion is combined with the preliminary voltage signal before performing verification.

[0066] Steps 305-330 and 345 are the same as steps 205-230 and 245 of method 200. In step 350, based on the distribution of the substantially stable portion in the original voltage signal, the preliminary voltage signal for the entire fluctuating portion is combined with the substantially stable portion to obtain a combined voltage signal.

[0067] At step 355, a first distribution of the combined voltage signal is determined. At step 360, a determination is made as to whether the first distribution conforms to a predetermined distribution of the original voltage signal. If so, at step 370, the voltage signal is determined to be suitable for battery testing. Otherwise, at step 365, the voltage signal is discarded.

[0068] The above describes how to verify the generated voltage signal with reference to comparing the distribution of the generated voltage signal with the distribution of the original voltage signal. This is not restrictive, and the generated voltage signal can also be verified by determining whether the generated voltage signal and the original voltage signal conform to the same distribution.

[0069] Figure 9 A method 400 for verifying a generated voltage signal according to an embodiment of the present disclosure is shown. The method 400 may replace Figure 8 Steps 355-370 in .

[0070] According to the method 400, in step 410, the conversion operation required to convert the distribution of the original voltage signal into a specific known distribution is obtained. If the distribution of the original voltage signal itself can conform to the specific known distribution, such as a normal distribution, through some conversion, then the distribution of the original voltage signal does not need to be divided. If the distribution of the original voltage signal needs to be divided to obtain one or more sub-distributions before each sub-distribution can be converted to conform to the specific known distribution, it is also necessary to obtain a predetermined rule for dividing the distribution of the original voltage signal into one or more sub-distributions, and to obtain a conversion operation for converting each sub-distribution to conform to the specific known distribution. The obtained predetermined rule can be one or more, and the obtained conversion operation can also be one or more.

[0071] At step 420 , a first distribution of the generated voltage signal is determined, which may be determined by histogram processing. Figure 10 A first distribution of a generated voltage signal according to one embodiment of the present disclosure is shown.

[0072] If a predetermined rule for dividing the distribution of the original voltage signal is obtained, in step 430, the first distribution is divided into at least one sub-distribution according to the predetermined rule. Figure 10 The illustrated first distribution may be divided into sub-distributions a and b according to a predetermined rule.

[0073] Then, in step 440, the first distribution is transformed according to the obtained transformation operation, which includes transforming at least one sub-distribution of the first distribution. Figure 11 The signal obtained by performing one of the conversion operations on the two sub-distributions of the first distribution according to an embodiment of the present disclosure is shown. Specifically, the mirror operation is performed on the left and right parts of the sub-distributions a and b respectively with the center as the reference. The distribution signal thus obtained is as follows Figure 11 As shown. Further, the conversion operation can also include a shaping operation, such as Figure 11 The distributions shown are respectively subjected to shaping operations to obtain converted first distributions. When the first distribution is divided into a plurality of sub-distributions, the converted first distribution may include a plurality of converted sub-distributions.

[0074] In one embodiment, the Sigmoid function or the tangent function can be used to Figure 11 The distributed signal shown is shaped.

[0075] At step 450, a determination is made as to whether the transformed first distribution conforms to a specific known distribution. This can be performed using statistical testing methods such as ANOVA, f-test, and t-test. If so, at step 470, the voltage signal is determined to be suitable for battery testing. Otherwise, at step 460, the voltage signal is discarded.

[0076] Figure 12 A device 10 for generating a voltage signal used in a battery test process according to an embodiment of the present disclosure is shown, wherein the device comprises a receiving unit 11 , a processing unit 12 and a verification unit 13 .

[0077] The receiving unit 11 receives the raw voltage signal of the target object, which the battery will use to power the target object to perform its operation. The receiving unit 11 can also receive a signal for verification, such as a predetermined rule and operation and / or whether the raw voltage signal conforms to a specific known distribution, and provides the received signal to a verification unit.

[0078] The processing unit 12 classifies the original voltage signal into a substantially stable portion and a fluctuating portion, extracts features of the fluctuating portion, generates a preliminary voltage signal based on the features of the fluctuating portion, and determines the voltage signal according to the preliminary voltage signal.

[0079] In one embodiment, the processing unit 12 further divides the fluctuating part into multiple segments, extracts the feature vector of each segment in the multiple segments, and clusters the segments of the fluctuating part into one or more regions based on the feature vectors of the segments, obtains one or more features of each of the one or more regions, and generates a preliminary voltage signal based on the one or more features of the one or more regions.

[0080] In one embodiment, the processing unit 12 further determines a distribution of substantially stable portions in the original voltage signal, and combines the substantially stable portions with the preliminary voltage signal based on the distribution to generate the voltage signal. The distribution includes the duration and frequency of each substantially stable portion in the original voltage signal.

[0081] The verification unit 13 can verify the generated preliminary voltage signal or voltage signal. In one embodiment, the verification unit 13 determines a first distribution of the preliminary voltage signal and determines whether the first distribution of the preliminary voltage signal conforms to a predetermined distribution of fluctuating portions in the original voltage signal. If the verification unit 13 determines that the first distribution of the preliminary voltage signal conforms to the predetermined distribution, the processing unit 12 combines the substantially stable portion with the preliminary voltage signal to generate the voltage signal.

[0082] Alternatively, in another embodiment, the verification unit 13 determines the first distribution of the voltage signal and determines whether the first distribution of the voltage signal conforms to a predetermined distribution of the original voltage signal, wherein if the verification unit determines that the first distribution of the voltage signal conforms to the predetermined distribution of the original voltage signal, the processing unit 12 determines the voltage signal as being used to test the battery.

[0083] The verification unit 13 may also perform verification in other ways, such as obtaining a conversion operation required to convert the distribution of the original voltage signal into a specific known distribution; determining a first distribution of the voltage signal; performing a conversion on the first distribution of the voltage signal according to the conversion operation to obtain a converted first distribution; and determining whether the converted first distribution conforms to the specific known distribution. If the verification unit 13 determines that the converted first distribution conforms to the specific known distribution, the processing unit 12 determines that the voltage signal is used to test the battery.

[0084] Figure 13A block diagram of an electronic device 800 is shown, illustrating a method for generating a voltage signal used in a battery testing process according to an embodiment of the present disclosure. The electronic device 800 may include at least one processor 810, a memory (e.g., a non-volatile memory) 820, a storage 830, and a communication interface 840, and the at least one processor 810, the storage 820, the storage 830, and the communication interface 840 are connected together via a bus 850. The at least one processor 810 executes at least one computer-readable instruction stored or encoded in the memory (i.e., the above-mentioned elements implemented in the form of software).

[0085] In one embodiment, computer executable instructions are stored in the memory, which when executed cause at least one processor 810 to perform methods according to various embodiments of the present disclosure.

[0086] It should be understood that the computer executable instructions stored in the memory, when executed, cause at least one processor 810 to perform the above combined operations in various embodiments of this specification. Figure 1-11 Describes the various operations and functions.

[0087] The above reference Figure 1-13 Various embodiments of the method and apparatus of the present invention have been described. These embodiments can be combined with each other to achieve different effects, without being limited by the subject matter. Furthermore, the various units / steps / processes mentioned above are not restrictive, and the functions of the various units / steps / processes mentioned above can be combined / changed / modified to achieve corresponding effects.

[0088] The functions of each unit of the device of the present invention can be implemented by software or corresponding hardware, or by means of a processor. For example, the processor can read computer programs in a memory and execute these computer programs to implement the functions of the above-mentioned units. In one embodiment, the above-mentioned device of the present invention can also be implemented by a memory and a processor.

[0089] In one embodiment, the functionality of the above devices can be implemented in the processor of the mobile device, or can be implemented at a remote location relative to the mobile device.

[0090] It is understood that the methods and devices of various embodiments of the present disclosure can be implemented by computer programs / software. Such software can be loaded into the working memory of a microprocessor and used to execute the methods according to various embodiments of the present disclosure when run.

[0091] Exemplary embodiments of the present disclosure cover both creating / using the computer program / software of the present disclosure from the outset and converting an existing program / software to use the computer program / software of the present disclosure by means of an update.

[0092] According to another embodiment of the present disclosure, a computer program product is provided, such as a machine (e.g., computer) readable medium, such as a CD-ROM, which includes computer program code that, when executed, causes a computer or processor to perform the methods according to various embodiments of the present disclosure. The machine-readable medium is, for example, an optical storage medium or solid-state medium supplied with or as part of other hardware.

[0093] The computer program for executing the methods according to various embodiments of the present disclosure may also be distributed in other forms, for example, via the Internet or other wired or wireless telecommunication systems.

[0094] The computer program may also be provided over a network such as the World Wide Web and can be downloaded from such a network into a working computer of the microprocessor.

[0095] It must be noted that the embodiments of the present disclosure are described with reference to different subject matters. In particular, some embodiments are described with reference to method claims, while other embodiments are described with reference to apparatus claims. However, those skilled in the art will understand from the above and following descriptions that, unless otherwise indicated, in addition to any combination of features belonging to one type of subject matter, any combination of features relating to different subject matters is also considered to be disclosed by this application. Furthermore, all features can be combined to provide a synergistic effect that is greater than the simple sum of the features.

[0096] The foregoing description describes specific embodiments of the present disclosure. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims can be performed in an order different from that described in the embodiments and still achieve the desired results. Furthermore, the processes depicted in the accompanying drawings do not necessarily require the specific order shown or the sequential order to achieve the desired results. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0097] While the present disclosure has been described above with reference to specific embodiments, those skilled in the art will appreciate that the technical solutions of the present disclosure can be implemented in various ways without departing from the spirit and essential features of the present disclosure. The specific embodiments are merely illustrative and non-restrictive. Furthermore, these embodiments can be combined in any manner to achieve the objectives of the present disclosure. The scope of protection of the present disclosure is defined by the appended claims.

[0098] The word "comprising" in the specification and claims does not exclude the presence of other elements or steps. The description of individual "steps" and the order of the steps shown in the figures do not limit their order or quantity. The functions of the various elements described in the specification or recited in the claims may be separated or combined and performed by multiple corresponding elements or a single element.

Claims

1. A method for generating a voltage signal used in a battery testing process, the method comprising: receiving a raw voltage signal from a target object, wherein the battery is used to power the target object to perform its operation; classifying the original voltage signal into a substantially stable portion and a fluctuating portion; extracting one or more features of the fluctuating portion; generating a preliminary voltage signal based on the one or more characteristics of the fluctuating portion; and The voltage signal is determined based on the preliminary voltage signal.

2. The method according to claim 1, further comprising: dividing the fluctuating portion into a plurality of segments; extracting a feature vector for each of the plurality of segments; clustering the plurality of segments into one or more regions based on the feature vectors of the plurality of segments; obtaining one or more characteristics of each of the one or more regions; and The preliminary voltage signal is generated based on the one or more characteristics of the one or more regions.

3. The method according to claim 1 or 2, further comprising: determining a distribution of the substantially stable portion in the original voltage signal; and The substantially stable portion is combined with the preliminary voltage signal based on the distribution to generate the voltage signal.

4. The method according to claim 3, wherein: The distribution includes the duration and frequency of each of the substantially stable portions occurring in the original voltage signal.

5. The method according to claim 3, further comprising: determining a first distribution of the preliminary voltage signal, determining whether the first distribution conforms to a predetermined distribution of the fluctuating portion of the raw voltage signal, and, if the first distribution is determined to conform to the predetermined distribution, combining the substantially stable portion with the preliminary voltage signal to generate the voltage signal; or A first distribution of the voltage signal is determined, and whether the first distribution conforms to a predetermined distribution of the original voltage signal is determined, and if the first distribution is determined to conform to the predetermined distribution, the voltage signal is determined to be used for testing the battery.

6. The method according to claim 3, further comprising: Obtaining a conversion operation required to convert the distribution of the original voltage signal into a specific known distribution; determining a first distribution of the voltage signal; performing a transformation on the first distribution according to the transformation operation to obtain a transformed first distribution; determining whether the transformed first distribution conforms to the specific known distribution; and If so, it is determined that the voltage signal is used to test the battery.

7. The method according to claim 1 or 2, wherein: The preliminary voltage signal is generated by a Markov chain.

8. A device for generating a voltage signal used in a battery testing process, the device comprising: a receiving unit for receiving an original voltage signal of a target object, wherein the battery is used to power the target object to perform its operation; as well as A processing unit that classifies the original voltage signal into a substantially stable portion and a fluctuating portion, extracts one or more features of the fluctuating portion, generates a preliminary voltage signal based on the one or more features of the fluctuating portion, and determines the voltage signal based on the preliminary voltage signal.

9. The apparatus according to claim 8, wherein The processing unit also divides the fluctuating part into multiple segments, extracts a feature vector of each of the multiple segments, clusters the multiple segments into one or more regions based on the feature vectors of the multiple segments, obtains one or more features of each of the one or more regions, and generates the preliminary voltage signal based on the one or more features of the one or more regions.

10. The apparatus according to claim 8 or 9, wherein The processing unit further determines a distribution of the substantially stable portion in the original voltage signal, and combines the substantially stable portion with the preliminary voltage signal based on the distribution, thereby generating the voltage signal.

11. The apparatus according to claim 10, wherein The distribution includes the duration and frequency of each of the substantially stable portions occurring in the original voltage signal.

12. The device according to claim 10, further comprising a verification unit, determining a first distribution of the preliminary voltage signal, and determining whether the first distribution conforms to a predetermined distribution of the fluctuating portion in the original voltage signal, wherein: If the verification unit determines that the first distribution conforms to the predetermined distribution, the processing unit combines the substantially stable portion with the preliminary voltage signal to generate the voltage signal; or A first distribution of the voltage signal is determined, and whether the first distribution conforms to a predetermined distribution of the original voltage signal is judged, wherein if the verification unit judges that the first distribution conforms to the predetermined distribution, the processing unit determines the voltage signal as being used to test the battery.

13. The device according to claim 10, further comprising a verification unit, Obtaining a conversion operation required to convert the distribution of the original voltage signal into a specific known distribution; determining a first distribution of the voltage signal; performing a transformation on the first distribution according to the transformation operation to obtain a transformed first distribution; and determining whether the transformed first distribution conforms to the specific known distribution; in, If the verification unit determines that the converted first distribution matches the specific known distribution, the processing unit determines the voltage signal as being used to test the battery.

14. The apparatus according to claim 8 or 9, wherein The preliminary voltage signal is generated by a Markov chain.

15. A computer program product comprising computer program instructions which, when executed, cause a processor to perform the method according to any one of claims 1 to 7.

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