Battery pack damping determination method and system, electronic device, and storage medium

Abstract

The application provides a battery pack damping determination method, system, electronic equipment and storage medium. The method comprises the following steps: obtaining a vibration curve of a battery pack, taking an upper limit value of a plurality of displacement response values in the vibration curve as an actual displacement response value of the battery pack; determining an interpolation interval of a target damping value of the battery pack in a simulation data table based on the actual displacement response value; determining a fitting damping value of the battery pack in the interpolation interval by using an interpolation method; and correcting the fitting damping value to obtain the target damping value. The application is beneficial to accurately obtaining the target damping value of the battery pack, thereby ensuring the accuracy of the input parameters of the battery pack vibration response test.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of intelligent parking, and in particular to a battery pack damping determination method and system, an electronic device, and a storage medium. BACKGROUND

[0002] A power battery pack is an energy storage component of an electric vehicle, and needs to complete charge and discharge tests under conditions such as temperature change, vibration, and impact before being put into use. According to the test results, the battery pack is optimized to meet the requirements of mechanical bearing, working safety, and reliability in a variable operating environment and driving conditions. Specifically, in the test process of the battery pack, the battery pack is usually simulated under two working conditions of steady-state random vibration and instantaneous impact. The structural damage of the battery pack caused by vibration is analyzed from the stress value, and the response of the internal electrical contact points of the battery pack in the vibration environment is described from the acceleration.

[0003] Obviously, in the battery pack vibration response test, the test results of the battery pack are of great significance to the optimization of its structural performance. The damping of the battery pack is an important parameter of the vibration response test, and its accuracy will inevitably affect the accuracy of the test results of the battery pack. However, the related art does not provide an effective and accurate method for determining the damping value of the battery pack, and thus cannot guarantee the accuracy of the test results of the battery pack. SUMMARY

[0004] The present application aims to at least partially solve one of the technical problems in the related art. To this end, one object of the present application is to provide a battery pack damping determination method and system, an electronic device, and a storage medium, which determines a fitted damping value of a battery pack using an interpolation method, corrects the fitted damping value, and finally obtains a target damping value with high accuracy, thereby ensuring the accuracy of the input parameters of the battery pack vibration response test.

[0005] One aspect of the present application provides a battery pack damping determination method, which can include: obtaining a vibration curve of a battery pack, taking an upper limit value of a plurality of displacement response values in the vibration curve as an actual displacement response value of the battery pack; determining an interpolation interval of a target damping value of the battery pack in a simulation data table based on the actual displacement response value; determining a fitted damping value of the battery pack in the interpolation interval using an interpolation method; and correcting the fitted damping value to obtain the target damping value.

[0006] In some embodiments, the determining, based on the actual displacement response value, an interpolation interval of a target damping value of the battery pack in a simulation data table can include: arranging the actual displacement response value and a plurality of displacement simulation values in the simulation data table in descending order to obtain a descending order list; extracting a first displacement simulation value and a second displacement simulation value adjacent to the actual displacement response value in the descending order list; and taking an interval between a first end point damping value corresponding to the first displacement simulation value and a second end point damping value corresponding to the second displacement simulation value as the interpolation interval of the target damping value of the battery pack.

[0007] In some embodiments, the determining, based on the actual displacement response value, an interpolation interval of a target damping value of the battery pack in a simulation data table can include: arranging the actual displacement response value and a plurality of displacement simulation values in the simulation data table in descending order to obtain a descending order list; extracting a first displacement simulation value and a second displacement simulation value adjacent to the actual displacement response value in the descending order list; and taking an interval between a first end point damping value corresponding to the first displacement simulation value and a second end point damping value corresponding to the second displacement simulation value as the interpolation interval of the target damping value of the battery pack.

[0008] In some embodiments, the determining, based on the actual displacement response value, an interpolation interval of a target damping value of the battery pack in a simulation data table can include: arranging the actual displacement response value and a plurality of displacement simulation values in the simulation data table in descending order to obtain a descending order list; extracting a first displacement simulation value and a second displacement simulation value adjacent to the actual displacement response value in the descending order list; and taking an interval between a first end point damping value corresponding to the first displacement simulation value and a second end point damping value corresponding to the second displacement simulation value as the interpolation interval of the target damping value of the battery pack.

[0009] In some embodiments, before the obtaining a vibration curve of the battery pack and taking an upper limit value of a plurality of displacement response values in the vibration curve as an actual displacement response value of the battery pack, the method can further include: obtaining a simulation vibration frequency of the finite element model; and generating a simulation performance qualified result of the finite element model when an error between the simulation vibration frequency and an actual vibration frequency of the target vehicle is less than a frequency error threshold.

[0010] In some embodiments, before the actual displacement response value of the battery pack is obtained from the upper limit value of the plurality of displacement response values in the vibration curve of the battery pack, the method can further include: obtaining a displacement simulation value corresponding to each of a plurality of damping values of a preset gradient within a preset sampling range by analyzing and processing the plurality of damping values of the preset gradient using the finite element model; and integrating each of the damping values and the displacement simulation value corresponding thereto to obtain a simulation data table, wherein the simulation data table is composed of a plurality of groups of damping values and displacement simulation values having a corresponding relationship.

[0011] In some embodiments, after the target damping value is obtained by correcting the fitted damping value, the method can further include: analyzing the target damping value by using the finite element model to obtain a displacement simulation value corresponding to the target damping value; and calculating an error value between the displacement simulation value corresponding to the target damping value and the actual displacement response value, and generating a qualified result of the target damping value when the error value is less than a displacement error threshold.

[0012] Another aspect of the present application provides a battery pack damping determination system, which can include: an actual displacement response value determination module, an interpolation interval determination module, a fitted damping value extraction module, and a correction module. The actual displacement response value determination module is configured to obtain a vibration curve of a battery pack, and to take an upper limit value of a plurality of displacement response values in the vibration curve as an actual displacement response value of the battery pack. The interpolation interval determination module is configured to determine an interpolation interval of a target damping value of the battery pack in a simulation data table based on the actual displacement response value. The fitted damping value extraction module is configured to determine a fitted damping value of the battery pack in the interpolation interval by using an interpolation method. The correction module is configured to correct the fitted damping value to obtain the target damping value.

[0013] Still another aspect of the present application provides an electronic device including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the steps of the battery pack damping determination method according to any one of the above embodiments.

[0014] Still another aspect of the present application provides a storage medium storing a computer program, wherein the computer program is adapted to be loaded by a processor to execute the steps of the battery pack damping determination method according to any one of the above embodiments.

[0015] According to the technical solutions of the above embodiments, at least one of the following beneficial effects can be achieved.

[0016] According to the battery pack damping determination method, system, electronic device and storage medium provided in the application, the interpolation method is used to determine the fitting damping value of the battery pack, and the fitting damping value is corrected, so that the target damping value with high accuracy is finally obtained. The application is beneficial to accurately obtaining the target damping value of the battery pack, thereby ensuring the accuracy of the input parameters of the battery pack vibration response test. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a flowchart of a battery pack damping determination method according to an aspect of the application;

[0018] Figure 2 is a schematic diagram of an interpolation interval of a target damping value according to an aspect of the application;

[0019] Figure 3 is a block diagram of a battery pack damping determination system according to another aspect of the application;

[0020] Figure 4 is a schematic diagram of an electronic device structure according to still another aspect of the application; and

[0021] Figure 5 is a schematic diagram of a storage medium structure according to still another aspect of the application. DETAILED DESCRIPTION

[0022] For a better understanding of the present application, various aspects of the present application will be described in more detail below with reference to the accompanying drawings. It should be appreciated that these detailed description is only a description of exemplary embodiments of the present application, and does not limit the scope of the present application in any way. Throughout the description and claims of this specification, the same reference numerals in different drawings represent the same elements. The expression "and / or" includes any and all combinations of one or more of the associated listed items.

[0023] It should be noted that in the present specification, the expressions first, second, third, etc. are only used to separate one feature from another feature region, and do not represent any limitation on the features, especially do not represent any order of precedence. Therefore, without departing from the teachings of the present application, the first file type discussed in the present application can also be referred to as the second file type, the first file level can also be referred to as the second file level, and vice versa.

[0024] In the drawings, the thickness, size and shape of the components have been slightly adjusted for ease of illustration. The drawings are merely examples and are not strictly drawn to scale. As used in this document, the expressions "approximately", "about" and similar expressions are used as approximate expressions, not as expressions of degree, and are intended to illustrate the inherent deviations in measured or calculated values that would be recognized by one of ordinary skill in the art.

[0025] It should also be understood that all references to the application herein using expressions such as "including", "containing" and / or "comprising" or "having" refer to the presence of stated features, elements and / or components, but do not preclude the presence or addition of one or more other features, elements, components and / or combinations thereof. Additionally, it should be understood that when term such as "at least one of' appears before a list of two or more items, that the phrase refers to any single one of the items in the list, all of the items in the list, or any combination or permutation of the items in the list.

[0026] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an overly literal or overly formal sense unless expressly so defined herein.

[0027] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict. In addition, unless specifically limited or contradicted by context, the specific steps contained in the methods described in the present application do not have to be limited to the order described and can be performed in any order or in parallel. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0028] Figure 1 is a flow chart of a method for determining battery pack damping according to an aspect of the present application.

[0029] As shown in Figure 1 One aspect of the present application provides a method for determining battery pack damping, which can include: step S110, obtaining a vibration curve of the battery pack, and taking an upper limit value of a plurality of displacement response values in the vibration curve as an actual displacement response value of the battery pack; step S120, determining an interpolation interval of a target damping value of the battery pack in a simulation data table based on the actual displacement response value; step S130, determining a fitting damping value of the battery pack in the interpolation interval by using an interpolation method; and step S140, correcting the fitting damping value to obtain the target damping value.

[0030] In some embodiments, the battery pack includes an upper cover and a lower box body, and in the present application, the battery pack is taken as a whole for damping test, of course, any one of the upper cover or the lower box body of the battery pack can be selected as the damping detection object, which is not limited here.

[0031] In some embodiments, the finite element model is used as a vibration response simulation model of the battery pack to obtain a displacement simulation value corresponding to any input damping value. Since the finite element model is needed to obtain the displacement simulation values corresponding to each damping value in the simulation data table in the subsequent process, and the accuracy of the target damping value of the battery pack needs to be verified using the finite element model, the accuracy of the finite element model output data needs to be ensured. Based on this, the vibration curve of the battery pack in the target vehicle is first determined, and the actual vibration frequency of the target vehicle where the battery pack is located is determined according to the vibration curve. Further, the simulation vibration frequency of the finite element model is obtained, and the simulation vibration frequency is compared with the actual vibration frequency. When the error between the simulation vibration frequency of the finite element model and the actual vibration frequency of the target vehicle in the experimental road condition is less than the frequency error threshold, it is proved that the simulation performance of the finite element model is qualified, and a result of the qualified simulation performance of the finite element model is generated. On the contrary, if the error between the simulation vibration frequency of the finite element model and the actual vibration frequency of the target vehicle in the experimental road condition is greater than or equal to the frequency error threshold, it is proved that the simulation performance of the finite element model is poor, and a result of the unqualified simulation performance of the finite element model is generated. When the simulation performance of the finite element model is poor, the weights in the finite element model need to be corrected and optimized until the error between the simulation vibration frequency and the vibration frequency of the target vehicle in the actual road condition is less than the frequency error threshold, and the finite element model can be enabled. For example, the actual vibration frequency of the target vehicle carrying the battery pack in the experimental road condition is 37.12 Hz, and the simulation vibration frequency of the finite element model is 36.25 Hz. By calculation, the error between the two is 2.3%, which is less than the frequency error threshold of 5%, so the simulation result of the finite element model is reliable, and the finite element model can be enabled for subsequent simulation calculation. Of course, the specific value of the frequency error threshold can be adjusted according to the required accuracy of the user, which is not limited here.

[0032] In some embodiments, according to the vibration curve of the battery pack in the target vehicle, a plurality of displacement response values of the battery pack are obtained in the sweep frequency interval of 1 Hz to 100 Hz and the excitation amplitude range of 1 G, and the upper limit of the displacement response value of the battery pack is taken as the actual displacement response value of the battery pack. For example, the actual displacement response value can be 1.8 mm. Of course, the range of the sweep frequency interval and the range of the excitation amplitude can be set according to the requirements, which are not limited here.

[0033] In some embodiments, after the actual displacement response value of the battery pack is obtained, a plurality of displacement simulation values of the battery pack are still obtained in the sweep frequency range of 1 Hz to 100 Hz and the excitation amplitude range of 1 G. Specifically, in the preset sampling range, a plurality of damping values of the preset gradient are analyzed and processed by using the finite element model to obtain the displacement simulation values corresponding to each damping value. Specifically, the preset sampling range of the damping value is 0.01 to 0.04, and the sampling gradient is 0.01, that is, 0.01, 0.02, 0.03, and 0.04 are respectively taken as the input of the damping value of the finite element model, each damping value is processed and analyzed by the finite element model, and then the displacement simulation values corresponding to each damping value are output. Specifically, when the damping value is 0.01, the displacement simulation value output by the finite element model is 6.632 mm; when the damping value is 0.02, the displacement simulation value output by the finite element model is 4.059 mm; when the damping value is 0.03, the displacement simulation value output by the finite element model is 2.472 mm; and when the damping value is 0.04, the displacement simulation value output by the finite element model is 1.604 mm. Of course, the sampling range and the sampling gradient of the damping value can be adjusted according to the accuracy requirement, which is not limited here.

[0034] In some embodiments, the plurality of damping values sampled in the preset sampling range and the displacement simulation values corresponding to each damping value are integrated to generate a simulation data table including a plurality of groups of damping values and displacement simulation values having a corresponding relationship.

[0035] In some embodiments, based on the selection of the damping values in the preset sampling range with the preset gradient and the determination of the displacement simulation values corresponding to the damping values, it can be seen that the displacement simulation value of the battery pack decreases with the increase of the damping value; in other words, the displacement simulation value presents a monotonically decreasing trend with the increase of the damping value. Further, the actual displacement response value of the battery pack and each displacement response value in the simulation data table are arranged in descending order to obtain a descending order table. Further, according to the position of the actual displacement response value in the descending order table, two displacement simulation values adjacent to the actual displacement response value are extracted and defined as a first displacement simulation value and a second displacement simulation value. Further, the damping value corresponding to the first simulation value in the simulation data table is determined as a first endpoint damping value, and the damping value corresponding to the second simulation value in the simulation data table is determined as a second endpoint damping value, and finally the interval between the first endpoint damping value and the second endpoint damping value is taken as the interpolation interval of the target damping value of the battery pack. For example, when the actual displacement response value is 1.8 mm, the actual displacement response value is located between 2.472 mm and 1.604 mm in the simulation data table, i.e. 2.472 mm is defined as the first displacement simulation value and 1.604 mm is defined as the second displacement simulation value, and then the interpolation interval of the target damping value corresponding to the actual displacement response value is 0.03 to 0.04.

[0036] In some embodiments, based on the interpolation interval of the target damping value of the battery pack, an interpolation method is used to determine the fitting damping value of the battery pack in the interpolation interval. Specifically, since the displacement simulation value presents a monotonically decreasing trend with the increase of the damping value, an inverse proportional function can be initially set as a fitting function between the displacement simulation value and the corresponding damping value. First, the first displacement simulation value corresponding to the first endpoint damping value and the second displacement simulation value corresponding to the second endpoint damping value are extracted in the simulation data table to obtain a first fitting number pair composed of the first endpoint damping value and the first displacement simulation value, and a second fitting number pair composed of the second endpoint damping value and the second displacement simulation value. Further, the fitting slope of the inverse proportional function straight line where the first fitting number pair and the second fitting number pair are located is determined. Further, since the fitting function is an inverse proportional function, after the fitting slope is obtained, the fitting function with the fitting slope can be constructed, and the actual displacement response value of the battery pack is brought into the fitting function to obtain the fitting damping value corresponding to the actual displacement response value in the fitting function.

[0037] Specifically, the inverse proportional function can be: Y = γX + α, (1)

[0038] In formula (1), Y is the displacement simulation value, X is the damping value, γ is the fitting slope, and α is the fitting parameter.

[0039] In some embodiments, the first displacement simulation value is 2.472 mm, the second displacement simulation value is 1.604 mm, the first end-point damping value corresponding to the first displacement simulation value is 0.03, the second end-point damping value corresponding to the second displacement simulation value is 0.04, based on which a fitting slope γ1 = -86.8 and a fitting parameter α1 = 5.076 can be obtained, and then a fitting function Y = -86.8X + 5.076 can be obtained. Further, the actual displacement response value of the battery pack is 1.8 mm, which is substituted into the fitting function to obtain a fitting damping value of about 0.0376.

[0040] In some embodiments, although the displacement simulation value presents a monotonically decreasing trend as the damping value increases, the two are not in a linear inverse relationship, and thus there is an error between the fitting damping value obtained by the fitting function and the target damping value, which needs to be corrected to obtain a target damping value with credibility.

[0041] Specifically, the displacement simulation value corresponding to the fitting damping value is calculated by using the finite element model to obtain a simulation number pair composed of the fitting damping value and the displacement simulation value corresponding thereto. Further, based on the fitting slope and the simulation number pair, a simulation parameter is determined, and then a simulation function including the simulation number pair is constructed. Finally, the target damping value corresponding to the actual displacement response value in the simulation function is calculated by using the simulation function.

[0042] Figure 2 is a block diagram of a battery pack damping determination system according to another aspect of the application.

[0043] In order to intuitively show the correction process of the fitting damping value, as shown in Figure 2 , a spatial coordinate system of the damping value X and the displacement simulation value Y is constructed, wherein L1 is a fitting line segment corresponding to the fitting function, and L2 is a simulation line segment corresponding to the simulation function. Specifically, point E represents a first simulation number pair composed of the first end-point damping value X E and the first displacement simulation value Y E , point F represents a second simulation number pair composed of the first end-point damping value X F and the first displacement simulation value Y F , and point A represents an interpolation number pair composed of the actual displacement response value Y A and the fitting damping value X A . Further, since the actual displacement response value Y A of point A is known, the fitting damping value X A of point A is substituted into the finite element model to obtain the displacement simulation value corresponding to the fitting damping value X A , for example, when the fitting damping value X A is 0.0376, the displacement simulation value corresponding to the fitting damping value can be 1.758 mm, which is substituted into the fitting function Y = -86.8X + 5.076 to obtain the target damping value of the battery pack.A corresponding displacement simulation value and fitting damping value X A The pair of numbers is taken as a simulation pair, and the simulation pair is mapped in the Figure 2 coordinate system as the C point. Further, the value of the fitting slope γ1=-86.8 of the fitting function is taken as the value of the simulation slope of the simulation function, that is, γ2=-86.8; the simulation slope γ2 and the coordinates of the C point are substituted into formula (1), that is, α2=0.056 is obtained, and further the simulation function Y=-86.8X+5.056 is obtained. Still further, the actual displacement response value Y A of the A point is substituted into the simulation function, that is, the value of the target damping value corresponding to the actual displacement response value in the simulation function, that is, the value of the abscissa of the B point is obtained. In other words, the mapping point of the point with the same actual displacement response value as the A point in the simulation straight line L2 is the B point. If the actual displacement response value is 1.8 mm, the damping value corresponding to the actual displacement response value in the simulation function is about 0.0375, and it is taken as the target damping value of the battery pack.

[0044] Of course, the target damping value corresponding to the B point can also be obtained by using the principle of similar triangles. Specifically, since the coordinates of the C point and the coordinates of the A point are known, the length of the straight side AC in the triangle ABC is the difference between the ordinate of the A point and the ordinate of the C point, that is, 1.8-1.758=0.042 mm; the length of the straight side AB of the triangle ABC is the interpolation value between the abscissa of the A point and the abscissa of the B point, but since the abscissa of the B point is unknown, that is, the value of the abscissa of the B point is taken as X B , then the length of AB is 1.8-X B . In Figure 2 the rectangular coordinate system, a right triangle EFG is established with the G point as the intersection of the two right sides of the triangle EFG. Since the slopes of L1 and L2 are equal, based on the principle of similar triangles, the tangent values of angles ABC and EFG are the same, that is, tan ∠ABC=tan ∠EFG=86.8, since the coordinates of the E point, the coordinates of the F point, the coordinates of the G point, and the length of AC are known, the length of the side AB can be obtained, which is about 0.000484 in the present application. Further, since the A point and the B point have the same ordinate value, the abscissa of the B point is the difference between the abscissa of the A point and the length of the side AB, that is, X B =0.0376-0.000484≈0.0375, that is, the target damping value is about 0.0375.

[0045] In some embodiments, since the point B is a point in the simulation function, the corresponding target damping value is not the actual damping value of the battery pack, and therefore the target damping value needs to be verified. Specifically, the target damping value is substituted into the finite element model, the target damping value is processed and analyzed by the finite element model, and then a displacement simulation value corresponding to the target damping value is output. The displacement simulation value corresponding to the target damping value is compared with the actual displacement response value of the battery pack, and an error value between the displacement simulation value corresponding to the target damping value and the actual displacement response value is calculated. When the error value is less than a displacement error threshold, a verification qualified result of the target damping value is generated. The displacement error threshold can be 20%, or can be adjusted according to the test accuracy. Of course, if the error value between the displacement simulation value corresponding to the target damping value and the actual displacement response value exceeds the displacement error threshold, the interpolation interval needs to be reselected until the error between the two is controlled within the displacement error threshold, and then the target damping value of the battery pack can be output.

[0046] According to the method for determining the damping of a battery pack, the interpolation method is used to determine the fitting damping value of the battery pack, and the fitting damping value is corrected to finally obtain a target damping value with high accuracy. The present application is beneficial to accurately obtaining the target damping value of the battery pack, and thus ensures the accuracy of the input parameters of the battery pack vibration response test.

[0047] Figure 3 is a system block diagram for determining the damping of a battery pack according to another aspect of the present application.

[0048] As Figure 3 shown, another aspect of the present application provides a system 200 for determining the damping of a battery pack, which can include: an actual displacement response value determination module 210, an interpolation interval determination module 220, a fitting damping value extraction module 230, and a correction module 240. The actual displacement response value determination module 210 is used to obtain a vibration curve of a battery pack, and the upper limit value of a plurality of displacement response values in the vibration curve is taken as the actual displacement response value of the battery pack. The interpolation interval determination module 220 is used to determine the interpolation interval of the target damping value of the battery pack in the simulation data table based on the actual displacement response value. The fitting damping value extraction module 230 is used to determine the fitting damping value of the battery pack in the interpolation interval by using the interpolation method. The correction module 240 is used to correct the fitting damping value to obtain the target damping value.

[0049] In some embodiments, the execution step of the interpolation interval determination module 220 can include: arranging the actual displacement response value and the plurality of displacement simulation values in the simulation data table in descending order to obtain a descending order list; extracting a first displacement simulation value and a second displacement simulation value adjacent to the actual displacement response value in the descending order list; and taking an interval between a first end point damping value corresponding to the first displacement simulation value and a second end point damping value corresponding to the second displacement simulation value as an interpolation interval of the target damping value of the battery pack.

[0050] In some embodiments, the execution step of the fitting damping value extraction module 230 can include: extracting a first displacement simulation value corresponding to the first end point damping value and a second displacement simulation value corresponding to the second end point damping value in the simulation data table respectively to obtain a first fitting number pair composed of the first end point damping value and the first displacement simulation value and a second fitting number pair composed of the second end point damping value and the second displacement simulation value; determining a fitting slope of a straight line on which the first fitting number pair and the second fitting number pair are located to construct a fitting function including the first fitting number pair and the second fitting number pair; and calculating a fitting damping value corresponding to the actual displacement response value in the fitting function.

[0051] In some embodiments, the execution step of the correction module 240 can include: calculating a displacement simulation value corresponding to the fitting damping value by using the finite element model to obtain a simulation number pair composed of the fitting damping value and the displacement simulation value corresponding thereto; constructing a simulation function including the simulation number pair based on the fitting slope and the simulation number pair; and calculating a target damping value corresponding to the actual displacement response value in the simulation function by using the simulation function.

[0052] In some embodiments, a finite element model verification module (not shown) can be further included and can be configured to obtain a simulation vibration frequency of the finite element model; and generate a simulation performance qualified result of the finite element model when an error between the simulation vibration frequency and an actual vibration frequency of the target vehicle is less than a frequency error threshold value.

[0053] In some embodiments, a simulation data table generation module (not shown) can be further included and can be configured to analyze and process a plurality of damping values of a preset gradient by using the finite element model to obtain displacement simulation values corresponding to the damping values in a preset sampling range; and integrate the damping values and the displacement simulation values corresponding thereto to obtain the simulation data table, wherein the simulation data table is composed of a plurality of groups of damping values and displacement simulation values having a corresponding relationship.

[0054] In some embodiments, a result verification module (not shown) can be further included and can be configured to analyze the target damping value by using the finite element model to obtain a displacement simulation value corresponding to the target damping value; and calculate an error value between the displacement simulation value corresponding to the target damping value and the actual displacement response value, and generate a verification qualified result of the target damping value when the error value is less than a displacement error threshold value.

[0055] Figure 4 is a schematic diagram of an electronic device structure according to yet another aspect of the present application. As shown in Figure 4 , according to yet another aspect of the present application, there is also provided an electronic device 300. The electronic device 300 can include one or more processors and one or more memories. The memories can store computer readable code which, when executed by the one or more processors, can perform the method of determining battery pack damping as described above.

[0056] The method or system according to the embodiments of the present application can also be implemented by means of Figure 4 the architecture of an electronic device as shown in. As shown in Figure 4 , the electronic device 300 can include a bus 301, one or more CPUs 302, a read-only memory (ROM) 303, a random access memory (RAM) 304, a communication port connected to a network 305, input / output components 306, a hard disk 307, etc. The storage devices in the electronic device 300, such as the ROM 303 or the hard disk 307, can store the method of determining battery pack damping provided by the present application. The method of determining battery pack damping can for example include obtaining a vibration curve of a battery pack, taking the upper limit value of a plurality of displacement response values in the vibration curve as the actual displacement response value of the battery pack; determining an interpolation interval of a target damping value of the battery pack in a simulation data table based on the actual displacement response value; determining a fitted damping value of the battery pack in the interpolation interval using an interpolation method; and correcting the fitted damping value to obtain the target damping value. Further, the electronic device 300 can also include a user interface 308. Of course, Figure 4 the architecture as shown is only exemplary, and when implementing different devices, one or more components in the electronic device as shown can be omitted according to actual needs. Figure 4

[0057] Figure 5 is a schematic diagram of a computer readable storage medium structure according to yet another aspect of the present application. As shown in Figure 5 , is a computer readable storage medium 400 according to an embodiment of the present application. The computer readable storage medium 400 stores computer readable instructions. When the computer readable instructions are executed by a processor, the method of determining battery pack damping according to the embodiments of the present application described with reference to the above figures can be performed. The storage medium 400 includes but is not limited to, for example, volatile memory and / or non-volatile memory. The volatile memory can include, for example, random access memory (RAM) and cache memory, etc. The non-volatile memory can include, for example, read-only memory (ROM), hard disk, flash memory, etc.

[0058] ​In addition, according to the embodiments of the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the present application provides a non-transitory machine-readable storage medium storing machine-readable instructions executable by a processor to perform instructions corresponding to the method steps provided by the present application, for example: obtaining a vibration curve of a battery pack, taking an upper limit value of a plurality of displacement response values in the vibration curve as an actual displacement response value of the battery pack; determining an interpolation interval of a target damping value of the battery pack in a simulation data table based on the actual displacement response value; determining a fitted damping value of the battery pack in the interpolation interval by using an interpolation method; and correcting the fitted damping value to obtain the target damping value. When the computer program is executed by a central processing unit (CPU), the above functions defined in the method of the present application are performed.

[0059] The method and device, apparatus of the present application can be implemented in many ways. For example, the method and device, apparatus of the present application can be implemented by software, hardware, firmware, or any combination of software, hardware, firmware. The above order of steps for the method is only for illustration, and the steps of the method of the present application are not limited to the above specifically described order, unless otherwise specifically described. In addition, in some embodiments, the present application can also be implemented as programs recorded in a recording medium, which include machine-readable instructions for implementing the method according to the present application. Thus, the present application also covers the recording medium storing the programs for executing the method according to the present application.

[0060] In addition, the part of the above technical solutions provided in the embodiments of the present application that is consistent with the implementation principle of the corresponding technical solutions in the prior art is not described in detail, so as not to be too verbose.

[0061] The above description is only for the embodiments of the present application and the explanation of the technical principles used. Those skilled in the art should understand that the scope of protection involved in the present application is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the technical concept. For example, the technical solutions formed by replacing the above features with the technical features disclosed in the present application (but not limited to) having similar functions.

Claims

1. A method of determining battery pack damping, the method comprising: The method comprises: obtaining a vibration curve of a battery pack, and taking an upper limit value of a plurality of displacement response values in the vibration curve as an actual displacement response value of the battery pack; determining an interpolation interval of a target damping value of the battery pack in a simulation data table based on the actual displacement response value; determining a fitted damping value of the battery pack in the interpolation interval by using an interpolation method; and correcting the fitted damping value to obtain the target damping value; the determining of the interpolation interval of the target damping value of the battery pack in the simulation data table based on the actual displacement response value comprises: arranging the actual displacement response value and a plurality of displacement simulation values in the simulation data table in descending order to obtain a descending order table; extracting a first displacement simulation value and a second displacement simulation value adjacent to the actual displacement response value in the descending order table; and taking an interval between a first end point damping value corresponding to the first displacement simulation value and a second end point damping value corresponding to the second displacement simulation value as the interpolation interval of the target damping value of the battery pack; the determining of the fitted damping value of the battery pack in the interpolation interval by using the interpolation method comprises: extracting a first displacement simulation value corresponding to the first end point damping value and a second displacement simulation value corresponding to the second end point damping value in the simulation data table respectively to obtain a first fitting number pair composed of the first end point damping value and the first displacement simulation value and a second fitting number pair composed of the second end point damping value and the second displacement simulation value; determining a fitting slope of a straight line where the first fitting number pair and the second fitting number pair are located to construct a fitting function including the first fitting number pair and the second fitting number pair; and calculating a fitted damping value corresponding to the actual displacement response value in the fitting function.

2. The method of claim 1, wherein, the correction of the fitted damping value to obtain the target damping value comprises: calculating a displacement simulation value corresponding to the fitted damping value by using a finite element model to obtain a simulation number pair composed of the fitted damping value and the displacement simulation value corresponding to the fitted damping value; constructing a simulation function including the simulation number pair based on the fitting slope and the simulation number pair; and calculating a target damping value corresponding to the actual displacement response value in the simulation function by using the simulation function.

3. The method of claim 1, wherein, Before the obtaining of the vibration curve of the battery pack and the taking of the upper limit value of the plurality of displacement response values in the vibration curve as the actual displacement response value of the battery pack, the method comprises: obtaining a simulation vibration frequency of a finite element model; and generating a simulation performance qualified result of the finite element model when an error between the simulation vibration frequency and an actual vibration frequency of a target vehicle is less than a frequency error threshold value.

4. The method of claim 3, wherein, Before the obtaining of the vibration curve of the battery pack and the taking of the upper limit value of the plurality of displacement response values in the vibration curve as the actual displacement response value of the battery pack, the method comprises: analyzing and processing a plurality of damping values of a preset gradient in a preset sampling range by using the finite element model to obtain displacement simulation values corresponding to the damping values; and integrating the damping values and the displacement simulation values corresponding to the damping values to obtain a simulation data table, wherein the simulation data table is composed of a plurality of groups of damping values and displacement simulation values having a corresponding relationship.

5. The method of claim 1, wherein, After the fitting damping value is corrected to obtain the target damping value, the method comprises: analyzing the target damping value by the finite element model to obtain a displacement simulation value corresponding to the target damping value; and calculating an error value between the displacement simulation value corresponding to the target damping value and the actual displacement response value, and generating a verification qualified result of the target damping value when the error value is less than a displacement error threshold.

6. A system for determining battery pack damping, comprising: The method comprises: an actual displacement response value determination module configured to obtain a vibration curve of a battery pack, and determine an upper limit value of a plurality of displacement response values in the vibration curve as an actual displacement response value of the battery pack; an interpolation interval determination module configured to determine an interpolation interval of a target damping value of the battery pack in a simulation data table based on the actual displacement response value; a fitting damping value extraction module configured to determine a fitting damping value of the battery pack in the interpolation interval by using an interpolation method; and a correction module configured to correct the fitting damping value to obtain the target damping value. The interpolation interval of the target damping value of the battery pack in the simulation data table based on the actual displacement response value comprises: arranging the actual displacement response value and a plurality of displacement simulation values in the simulation data table in descending order to obtain a descending order list; extracting a first displacement simulation value and a second displacement simulation value adjacent to the actual displacement response value in the descending order list; and determining an interval between a first end point damping value corresponding to the first displacement simulation value and a second end point damping value corresponding to the second displacement simulation value as the interpolation interval of the target damping value of the battery pack. The fitting damping value of the battery pack in the interpolation interval by using the interpolation method comprises: extracting a first displacement simulation value corresponding to the first end point damping value and a second displacement simulation value corresponding to the second end point damping value in the simulation data table respectively to obtain a first fitting number pair composed of the first end point damping value and the first displacement simulation value and a second fitting number pair composed of the second end point damping value and the second displacement simulation value; determining a fitting slope of a straight line where the first fitting number pair and the second fitting number pair are located to construct a fitting function comprising the first fitting number pair and the second fitting number pair; and calculating a fitting damping value corresponding to the actual displacement response value in the fitting function. The storage medium stores a computer program, and the computer program is suitable for being loaded by the processor to execute the steps in the battery pack damping determination method according to any one of claims 1-5.

7. An electronic device, comprising: The storage medium stores a computer program, and the computer program is suitable for being loaded by the processor to execute the steps in the battery pack damping determination method according to any one of claims 1-5.

8. A storage medium, characterized by ​

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