New energy automobile battery stack mounting bracket system optimization method and bracket system

Abstract

The invention relates to the field of new energy automobiles, in particular to a new energy automobile battery stack mounting bracket system optimization method and a bracket system. The new energy automobile battery stack mounting bracket system optimization method comprises the steps of obtaining user working condition first vibration response data and user working condition second vibration response data; performing independent vector analysis on the user working condition first vibration response data to obtain corrected user working condition first vibration response data; according to the corrected user working condition first vibration response data and the corrected user working condition second vibration response data, determining the vibration contribution of each cell stack mounting transverse plate bracket to the cell stack; and optimizing the support system according to the total fatigue damage of the user working condition, the single fatigue damage of the test site working condition and the user-test site association model. The problems that an existing mounting support is poor in buffering and anti-seismic effect and lacks an effective support system optimization method can be solved.

Description

Technical Field

[0001] The present application relates to the field of new energy vehicles, and more specifically, to a method for optimizing a new energy vehicle battery stack mounting bracket system and a bracket system. Background Art

[0002] A hydrogen fuel cell stack is a power generation device that directly converts the chemical energy in a fuel cell and an oxidant into electrical energy. It is widely used in new energy vehicles. In the fuel cell installation structure, the stack is often fixed on a steel mounting bracket, which is connected to the bus through a cross plate. Therefore, when the fuel cell is installed on the passenger compartment or chassis bracket in the vehicle structure, the simple installation structure easily causes the cross plate bracket directly connected to the stack to be subjected to vibration and impact in the driving direction during the vehicle's driving process. In addition, the existing fuel cell stack mounting bracket has poor buffering and anti-seismic effect and cannot adapt to different types of fuel cell stacks. Therefore, it is urgent to design an excellent buffer structure to share the pressure of the cross plate bracket and meet the durability and reliability performance requirements of existing target users.

[0003] Durability and reliability are important indicators for evaluating the performance of the vehicle and its components. It is crucial to design a safe, reliable and long-lasting fuel cell stack mounting bracket and ensure the fatigue durability of the fuel cell stack mounting bracket structure. Good fatigue durability can fully prevent the fuel cell stack cross-plate mounting bracket from structural damage during vehicle driving, which may cause the fuel cell stack to burn and catch fire. Therefore, it is necessary to analyze the load data at the cross-plate mounting bracket and perform structural design and test verification on the bracket. Summary of the invention

[0004] The purpose of the present application is to provide a new energy vehicle battery stack mounting bracket system optimization method and bracket system to solve the problems of poor buffering and seismic resistance of existing mounting brackets and lack of effective bracket system optimization methods.

[0005] In order to achieve the above objectives, this application adopts the following technical solutions:

[0006] In a first aspect, the present application provides a method for optimizing a new energy vehicle battery stack mounting bracket system, comprising:

[0007] Acquire first vibration response data of user conditions and second vibration response data of user conditions, wherein the first vibration response data of user conditions are vibration response data of user conditions at the positions of the battery stack installation cross plate brackets and the battery stacks, and the second vibration response data of user conditions are vibration response data of user conditions at the positions of the battery stacks;

[0008] Performing independent vector analysis on the first vibration response data of the user working condition to obtain corrected first vibration response data of the user working condition;

[0009] Determining the vibration contribution of each battery stack mounting cross plate bracket to the battery stack according to the corrected first vibration response data of the user operating condition and the second vibration response data of the user operating condition;

[0010] Determine the number of cycles of the test field condition according to the total fatigue damage of the user condition, the single fatigue damage of the test field condition, and the user-test field correlation model of the battery stack mounting cross plate bracket at the front target position in descending order according to the vibration contribution;

[0011] The support system is optimized according to the total fatigue damage of the user working condition, the number of cycles of the test field working condition and the single fatigue damage of the test field working condition.

[0012] In some technical solutions, performing independent vector analysis on the first vibration response data of the user working condition to obtain the corrected first vibration response data of the user working condition includes:

[0013] The first vibration response data of the user working condition is subjected to zero mean processing and whitening processing in sequence to obtain a whitening matrix;

[0014] Calculating the KL divergence between signals according to the whitening matrix;

[0015] Determining an objective function according to the KL divergence between the signals;

[0016] The objective function is optimized by using a natural gradient method to obtain a separation matrix;

[0017] According to the whitening matrix and the separation matrix, the corrected first vibration response data of the user working condition is obtained.

[0018] In some technical solutions, the iterative formula of the separation matrix is:

[0019]

[0020] Among them, w i,k+1 (f) is the i-th column of the separation matrix W(f) at the k+1th iteration, where k is the number of iterations; w i,k (f) is the i-th column of the separation matrix W(f) at k iterations; η k is the step size parameter; Z i,k (f) T is the transposed form of the whitening matrix; G′ is the first-order derivative of G, G represents square root calculation; E represents mean calculation.

[0021] In some technical solutions, the corrected user working condition first vibration response data S is calculated using the following formula:

[0022] S=W·Z; wherein W is the separation matrix, and Z is the whitening matrix.

[0023] In some technical solutions, the optimizing the support system according to the total fatigue damage of the user working condition, the number of cycles of the test field working condition and the single fatigue damage of the test field working condition includes:

[0024] The support system is adjusted multiple times, and according to the number of cycles of the test field working condition and the single fatigue damage of the test field working condition, the total test field working condition damage of the support system after the multiple adjustments is determined;

[0025] The total damage of the support system under test field conditions and the total fatigue damage of the user conditions after the multiple adjustments are compared to determine the support system that needs to be optimized.

[0026] In some technical solutions, the total damage d of the test field condition is calculated using the following formula: Among them, d i is the single fatigue damage of the i-th working condition in the test field, A i is the number of cycles of the i-th working condition in the test field, and p is the total number of working conditions in the test field.

[0027] In a second aspect, the present application provides a new energy vehicle battery stack mounting bracket system, which is obtained by using the above-mentioned new energy vehicle battery stack mounting bracket system optimization method.

[0028] Some technical solutions include:

[0029] Two symmetrically arranged battery stack mounting cross plates, a plurality of battery stack mounting cross plate brackets, a battery stack support plate, an upper slide plate, an upper slide plate connecting bracket, a gear, a rack plate and a bearing;

[0030] The battery stack mounting transverse plate bracket is arranged on the battery stack mounting transverse plate and is used to be connected to the battery stack;

[0031] The battery stack support plate is disposed between the two battery stack mounting transverse plates and is used to support the battery stack;

[0032] The upper slide plate, the upper slide plate connecting bracket, the gear, the rack plate and the bearing are all arranged below the battery stack support plate; the rack plate, the gear, the bearing, the upper slide plate, the upper slide plate connecting bracket and the battery stack support plate are connected in sequence.

[0033] In some technical solutions, the upper slide plate, the upper slide plate connecting bracket, the gear, the rack plate and the bearing are all arranged on a rigid pad; the rigid pad is used to be connected to the vehicle body;

[0034] The rigid pad is also provided with an elastic pad and a buckle;

[0035] The buckle is used to connect the elastic pad, the rack plate and the rigid pad.

[0036] In some technical solutions, the rigid pad is also provided with a cylinder fixing plate and a cylinder that are connected to each other; the cylinder fixing plate is also connected to the rigid pad and the upper slide plate respectively.

[0037] Compared with the prior art, the beneficial effects of this application are:

[0038] The new energy vehicle battery stack mounting bracket system optimization method provided in the present application is based on the collected user road loads, combined with the user survey results to obtain the usage load conditions of 90% of users, and uses the actual user working conditions as input to perform transfer path analysis, identify the bracket positions that contribute more to the battery stack vibration, and optimize the fuel cell stack mounting bracket structure accordingly. Finally, combined with the basic damage matrix of various characteristic road conditions in the test field, a "user-test field" damage association model is established, and finally, the actual user working conditions are tested equivalently, and the durability and reliability performance of the bracket after optimization is examined with equivalent loads.

[0039] 1) The optimization process of the present invention takes the actual load of the user as input, which fits the actual driving conditions of the vehicle and can truly reflect the durability performance of the mounting bracket.

[0040] 2) The present invention adopts a transfer path analysis method based on the IVA algorithm. By independently decoupling and analyzing multiple battery stack cross plate brackets, the vibration contribution of each battery stack mounting bracket to the battery itself can be more accurately calculated. The mounting bracket that has a greater impact on the battery stack vibration can be quickly identified, and targeted optimization can be performed to prevent over-design of the overall structure.

[0041] 3) The present invention constructs a user-test field correlation damage model to test the actual user working conditions, and can use equivalent loads to examine the durability and reliability performance of the optimized bracket.

[0042] 4) The new energy vehicle battery stack mounting bracket system of the present invention effectively improves the force distribution of the mounting bracket mounting point, reduces the risk of the mounting bracket cracking, and significantly reduces the vibration impact of the fuel cell stack from road excitation.

[0043] 5) The structure of the present invention is simple and reliable, suitable for the installation structure of the roof-mounted fuel cell stack of most buses, and also suitable for vehicles such as electric buses, and is easy to disassemble, assemble and overhaul. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0045] Figure 1 It is a flow chart of a method for optimizing a new energy vehicle battery stack mounting bracket system provided in this application;

[0046] Figure 2 This is a schematic diagram of the structure of the new energy vehicle battery stack mounting bracket system provided in this application. Figure 1 ;

[0047] Figure 3 This is a schematic diagram of the structure of the new energy vehicle battery stack mounting bracket system provided in this application. Figure 2 ;

[0048] Figure 4 This is a schematic diagram of the structure of the new energy vehicle battery stack mounting bracket system provided in this application. Figure 3 ;

[0049] Figure 5 It is a schematic diagram of the connection structure between the upper slide plate and the cylinder in the new energy vehicle battery stack mounting bracket system provided in this application;

[0050] Figure 6 It is a structural schematic diagram of the electronic device provided by this application.

[0051] Illustration: 1-rigid pad; 2-clip; 3-elastic pad; 4-front cylinder; 5-cylinder fixing plate; 6-rear cylinder; 7-gear; 8-bearing; 9-rack plate; 10-upper slide plate; 11-upper slide plate connecting bracket; 12-battery stack mounting cross plate bracket; 13-battery stack mounting cross plate; 14-battery stack support plate; 15-battery stack. DETAILED DESCRIPTION

[0052] The following is a description of exemplary embodiments of the present application in conjunction with the accompanying drawings, including various details of the embodiments of the present application to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. Similarly, for the sake of clarity and conciseness, the description of well-known functions and structures is omitted in the following description.

[0053] As mentioned in the background technology, the existing technology has the problem that the existing mounting bracket has poor buffering and anti-seismic effect and lacks effective bracket system optimization methods. In response to this, the present application optimizes the bracket system by using user working condition vibration response data, independent vector analysis, and building a user-test field correlation model. The present application is further described in detail below in conjunction with the embodiments.

[0054] Example 1

[0055] Figure 1 It is a flow chart of a method for optimizing a battery stack mounting bracket system for a new energy vehicle provided in this embodiment. The method can be executed by an optimization device for a battery stack mounting bracket system for a new energy vehicle. The device can be composed of software and / or hardware and is generally integrated in an electronic device. The electronic device can be an electronic computer. For ease of understanding, each step in the optimization method of this embodiment is executed by an electronic computer.

[0056] like Figure 1 As shown, this embodiment provides a method for optimizing a new energy vehicle battery stack mounting bracket system, comprising the following steps:

[0057] S110, obtaining first vibration response data of user operating conditions and second vibration response data of user operating conditions, wherein the first vibration response data of user operating conditions are the user operating condition vibration response data of each battery stack installation cross plate bracket and the battery stack position, and the second vibration response data of user operating conditions are the user operating condition vibration response data of the battery stack position.

[0058] There are multiple transverse plate brackets for mounting the battery stack, such as 4, 6, 8, 10, etc. The transverse plate bracket for mounting the battery stack is subject to greater vibration impact in the direction of vehicle travel, so it is necessary to analyze the transmission path and identify the main vibration contribution source, and thus it is necessary to obtain the above user condition first vibration response data and user condition second vibration response data.

[0059] S120 , performing independent vector analysis on the first vibration response data of the user working condition to obtain corrected first vibration response data of the user working condition.

[0060] Since there are multiple horizontal plate brackets for installing the battery stack, the distances between them are relatively close. There are many vibration sources during calculation, and signal coupling is prone to occur. As a result, the collected signal is severely affected by crosstalk and cannot effectively represent the real vibration signal at the collection position. Therefore, this embodiment uses the independent vector analysis (IVA) algorithm to decompose the independent components of the horizontal plate bracket positions for installing the battery stack, decouple the data, and obtain real data without interference.

[0061] In an optional implementation manner, performing independent vector analysis on the first vibration response data of the user working condition to obtain corrected first vibration response data of the user working condition includes:

[0062] The first vibration response data of the user working condition is subjected to zero mean processing and whitening processing in sequence to obtain a whitening matrix;

[0063] Calculating the KL divergence between signals according to the whitening matrix;

[0064] Determining an objective function according to the KL divergence between the signals;

[0065] The objective function is optimized by using a natural gradient method to obtain a separation matrix;

[0066] According to the whitening matrix and the separation matrix, the corrected first vibration response data of the user working condition is obtained.

[0067] Taking the installation of 8 battery stacks as an example, we first need to establish a standard noise-free signal IVA linear analysis model, where the number of vibration source signals is the number of 8 battery stack cross-plate brackets, and its matrix form is: X = A·S;

[0068] Among them, S represents the source signal vector, each signal is an independent component, S = (s1, s2, ..., s n ), X is the actual measured data response signal, X=(x1,x2,…,x n ); A is an n×n mixing matrix. In this embodiment, n=8. In this model, it is assumed that the source signals are independent of each other and the mixing coefficient matrix A is unknown. The task of IVA analysis is to restore 8 independent source signal data samples under the condition of 8 samples of the actual measurement signal battery stack cross plate bracket load X, S=W·X. W is a separation matrix.

[0069] Optionally, the zero mean processing adopts the following formula: Where, X mean is the data after removing the mean of the measured mixed signal X; is the average value of X.

[0070] Optionally, the whitening process includes: (a) finding the covariance matrix of the mixed signal: Where C is the obtained covariance matrix; n is the number of samples of the measured mixed signal X. (b) Eigenvalue decomposition: CV = VΛ, where V is the matrix composed of eigenvectors in columns, and Λ is the diagonal matrix composed of eigenvalues. The whitening matrix Z of the measured mixed signal X is finally obtained as:

[0071]

[0072] Optionally, the KL divergence between signals is calculated using the following formula:

[0073]

[0074] Among them, Z i =[Z i (f1),Z i (f2),…Z i (f N )]; p(Z)=p(Z1,Z2,…,Z N ) is the joint probability density function; is the product of the probability density functions of each signal.

[0075] Optionally, the objective function is: Where W(f) is the separation matrix at each frequency; det represents the determinant calculation value; and E represents the mean calculation.

[0076] In an optional implementation, the iterative formula of the separation matrix is:

[0077]

[0078] Among them, w i,k+1 (f) is the i-th column of the separation matrix W(f) at the k+1th iteration, where k is the number of iterations; w i,k (f) is the i-th column of the separation matrix W(f) at k iterations; η k is the step size parameter; Z i,k (f) T is the transposed form of the whitening matrix; G′ is the first-order derivative of G, G represents square root calculation; E represents mean calculation.

[0079] In an optional implementation manner, the corrected user working condition first vibration response data S is calculated using the following formula:

[0080] S=W·Z; wherein W is the separation matrix, and Z is the whitening matrix.

[0081] S130. Determine the vibration contribution of each battery stack mounting cross plate bracket to the battery stack according to the corrected first vibration response data of the user operating condition and the second vibration response data of the user operating condition.

[0082] Optionally, the vibration contribution is calculated using the following formula:

[0083]

[0084] Where Y b is the second vibration response data of the user condition, X is the corrected first vibration response data of the user condition, T b is the transfer rate matrix from each battery stack to the battery stack, n is the number of input points, there are 8 battery stacks with horizontal brackets, k is the number of actual user conditions, Yb l (ω) represents the target point response under condition l in the frequency domain, X i l (ω) represents the response of the ith input point in the frequency domain under condition l, T b l (ω) is expressed as the transmissibility under condition l in the frequency domain.

[0085] The higher the calculated transmissibility, the greater the vibration contribution.

[0086] S140, determining the number of cycles of the test field condition according to the total fatigue damage of the user condition of the battery stack mounting cross plate bracket at the front target position, the single fatigue damage of the test field condition and the user-test field correlation model according to the vibration contribution sorted from large to small.

[0087] The front target position refers to several brackets that are used to simplify the subsequent fatigue damage calculation and contribute more to the vibration, such as half of the total number of cross-plate brackets for installing the battery stack, such as the first 4. The user-test field association model is KD α =d, that is, the total fatigue damage of the user condition is equal to the total damage of the test field condition. The total fatigue damage of the user condition is KD α The total fatigue damage of the test field condition is d. The single fatigue damage of the test field condition is the fatigue damage of one cycle under the test field condition.

[0088] Optionally, the fatigue damage data of the four battery stack cross plate brackets with greater vibration contribution in actual user conditions and test field conditions are equivalently calculated to obtain the number of road cycles in each test field under the total mileage of the actual user conditions. The equivalent calculation is to convert the total damage of the user under normal roads into the total damage of each reinforced road condition (such as Belgian roads, cobblestone roads, stone roads, etc.) under the test field (single fatigue damage in test field conditions * number of cycles in test field conditions). Since the total fatigue damage in user conditions and the single fatigue damage in test field conditions are both known values, the number of cycles in the test field conditions can be calculated through the association model.

[0089] The calculation process of total fatigue damage of user conditions is as follows:

[0090] According to the linear Miner linear damage calculation principle, for various stress amplitude levels S1, S2, S3, ..., S n The load spectrum of the i-th stress level S i The fatigue life corresponding to the material is N i , the actual number of cycles is n i When the structure suffers fatigue damage, the calculation formula is:

[0091] When the sum of the number of stress cycles at each level and the fatigue life under the stress is 1, the structure is damaged. The specific damage calculation formula is: Where D is the cumulative fatigue damage and c is the load level, such as the acceleration response of the battery stack and bracket position.

[0092] The actual total fatigue damage under the user road at the four brackets affected by the main vibration is calculated by the above formula. The calculation formula is: D 总 =KD α , where D α is the total fatigue damage obtained by running the set distance under the user's working condition, n is the number of road types, D i is the fatigue damage of the i-th user condition, K is the load spectrum extrapolation coefficient, D 总 is the total fatigue damage of the user condition, and D α The damage after load spectrum extrapolation, if the set distance under user conditions is 300km and the actual user conditions are 3000km, then the coefficient K is 10.

[0093] According to the user-testing field association model KD α =d, The number of cycles of the test field working condition can be calculated; where d is the total fatigue damage of the test field, p is the total number of test field working conditions (i.e. the number of road types), A i is the number of cycles of the i-th working condition in the test field, d i The single fatigue damage of the i-th working condition of the test site is obtained by cycling the vehicle once under the i-th working condition of the test site. Among them, the test site working condition is multiple working conditions, that is, corresponding to multiple types of roads.

[0094] S150, optimizing the support system according to the total fatigue damage of the user working condition, the number of cycles of the test field working condition and the single fatigue damage of the test field working condition.

[0095] In an optional implementation, the optimizing the support system according to the total fatigue damage of the user working condition, the number of cycles of the test field working condition and the single fatigue damage of the test field working condition includes:

[0096] The support system is adjusted multiple times, and according to the number of cycles of the test field working condition and the single fatigue damage of the test field working condition, the total test field working condition damage of the support system after the multiple adjustments is determined;

[0097] The total damage of the support system under test field conditions and the total fatigue damage of the user conditions after the multiple adjustments are compared to determine the support system that needs to be optimized.

[0098] The initial bracket system has obtained the total fatigue damage of the user condition (which is equal to the total damage of the test field condition of the initial bracket system). After the bracket system is adjusted again, it is only necessary to calculate the total fatigue damage of the test field condition according to the number of cycles of the test field condition and the single fatigue damage of the test field condition obtained previously. The total damage of the test field working condition of the adjusted bracket system can be obtained, so the vehicle can be tested under the test field working condition to obtain the required total damage without the need for real road testing. Finally, the bracket system to be optimized can be obtained by comparing the total damage of the test field working condition of the bracket system after multiple adjustments and the total fatigue damage of the user working condition. For example, the bracket system with the smallest total damage is used as the bracket system to be optimized.

[0099] The above-mentioned new energy vehicle battery stack mounting bracket system optimization method is based on the collected user road loads, combined with the user survey results to obtain the usage load conditions of 90% of users, and uses the actual user working conditions as input to perform transfer path analysis, identify the bracket positions that contribute more to the battery stack vibration, and optimize the fuel cell stack mounting bracket structure accordingly. Finally, combined with the basic damage matrix of various characteristic road conditions in the test field, a "user-test field" damage association model is established. Finally, the actual user working conditions are tested equivalently, and the equivalent load is used to examine the durability and reliability performance of the bracket after optimization.

[0100] Example 2

[0101] like Figure 2-Figure 5 As shown, this embodiment provides a new energy vehicle battery stack mounting bracket system, which is obtained by using the new energy vehicle battery stack mounting bracket system optimization method in Example 1, and includes:

[0102] Two symmetrically arranged battery stack mounting transverse plates 13, a plurality of battery stack mounting transverse plate brackets 12, a battery stack support plate 14, an upper slide plate 10, an upper slide plate connecting bracket 11, a gear 7, a rack plate 9 and a bearing 8;

[0103] The battery stack mounting transverse plate bracket 12 is disposed on the battery stack mounting transverse plate 13 and is used to be connected to the battery stack 15;

[0104] The battery stack support plate 14 is disposed between the two battery stack mounting transverse plates 13 and is used to support the battery stack 15;

[0105] The upper slide plate 10, the upper slide plate connecting bracket 11, the gear 7, the rack plate 9 and the bearing are all arranged below the battery stack support plate 14; the rack plate 9, the gear 7, the bearing 8, the upper slide plate 10, the upper slide plate connecting bracket 11 and the battery stack support plate 14 are connected in sequence.

[0106] Figure 2 Schematic diagram of the structure of the bracket system for the new energy vehicle battery stack Figure 1As can be seen from the figure, the battery stack is installed in a top-mounted manner, using embedded bolts to tighten the installation. The installation bracket is susceptible to large impacts in the driving direction of the vehicle during driving. Since the battery stack installation cross-plate bracket is restricted by the production process, installation position and manufacturing cost, it is difficult to optimize. In order to directly reduce the vibration impact from the driving direction of the vehicle and facilitate the installation and disassembly of the bracket structure, this embodiment uses an upper slide plate to connect the bracket at the battery stack to optimize the system.

[0107] Optionally, there are two gears 7, one in the front and one in the rear in the direction of vehicle travel (X direction), the gear 7 is engaged with the rack plate 9, the gear 7 is connected to the upper slide plate 10 through a bearing 8, when the battery stack 15 (such as a fuel cell stack) is stimulated to move, the upper slide plate 10 can be driven to move slightly, which in turn drives the gear 7 to roll slightly; the upper slide plate 10 is connected to the battery stack support plate 14 through the upper slide plate connecting bracket 11, and the battery stack support plate 14 is connected to the battery stack 15 through bolts.

[0108] In a preferred embodiment, the upper slide plate 10, the upper slide plate connecting bracket 11, the gear 7, the rack plate 9 and the bearing 8 are all arranged on the rigid pad 1; the rigid pad 1 is used to be connected to the vehicle body;

[0109] The rigid pad 1 is also provided with an elastic pad 3 and a buckle 2;

[0110] The buckle 2 is used to connect the elastic pad 3, the rack plate 8 and the rigid pad 1.

[0111] Optionally, the rigid pad 1 is connected to the pre-buried bolt holes of the automobile roof through 6 bolts.

[0112] Optionally, the buckles 2 are provided in multiple numbers, for example, 4, 6, etc., and the buckles are made of metal. Multiple buckles 2 directly fix the elastic pad 3 and the rack plate 8 to the rigid pad 1 by bolts (similar to the fixing method of train rails), and the elastic pad 3 plays a role of buffering and seismic isolation, slowing down the excitation from the vertical direction (Z direction) and the lateral direction (Y direction) of the vehicle to the battery stack.

[0113] In a preferred embodiment, the rigid pad 1 is further provided with a cylinder fixing plate 5 and a cylinder which are connected to each other; the cylinder fixing plate 5 is also connected to the rigid pad 1 and the upper slide plate 10 respectively.

[0114] Optionally, the cylinders are divided into two groups, each group includes two cylinders, which are respectively arranged front and rear along the vehicle X direction (ie, the vehicle travel direction), including a front cylinder 4 and a rear cylinder 6.

[0115] Optionally, the front cylinder 4 and the rear cylinder 6 are fixed on the cylinder fixing plate 5 at the bottom by welding. The cylinder fixing plate 5 is a steel plate wrapped with a rubber layer and bonded together by vulcanization. The cylinder fixing plate 5 can reduce the impact of the cylinder. The cylinder fixing plate 5 is connected to the rigid pad 1 by bolts, and the upper slide plate 10 is connected to the front cylinder 4 and the rear cylinder 6 by bolts (see Figure 5 Enlarged image: that is, when the upper slide plate 10 moves forward and backward, it will drive the cylinder to move). When the bus is impacted from the X direction during normal driving, emergency braking or acceleration, the rigid pad 1 fixed to the body will not move due to inertia, while the upper battery stack box connected by the gear rack will move. Because the upper slide plate 10 is connected to the battery stack 15 and the front cylinder 4 and the rear cylinder 6 at the same time, when the battery stack moves, it will drive the upper slide plate 10 to move forward and backward, and then drive the gear 7 to roll on the rack plate 9. Because the upper slide plate 10 is connected to the front cylinder 4 and the rear cylinder 6, when it moves in the X direction, it will transmit the front and rear force to the cylinder. At this time, the cylinder absorbs the impact from the X direction. Regardless of whether the bus is accelerating or braking, the four cylinders can form a front and rear "pull and press" effect, which can greatly reduce the vibration caused by emergency braking, normal braking or acceleration. Compared with the direct guide rail slider connection and the side positioning baffle structure, the close meshing and precise guiding function of the gear rack plus the "pull and press" effect of the cylinder can keep the battery stack basically motionless, greatly reducing the impact from the X direction and the impact caused by the autonomous reaction inside the battery stack, and the cylinder fixing plate 5 and the elastic pad 3 can reduce the impact of the upper slide plate 10 on the cylinder. Through this two-stage buffer protection, it is guaranteed that the hydrogen and oxygen in the battery stack will react chemically smoothly, and there will be no risk of vibration of the chemical reaction diaphragm inside the battery.

[0116] The elastic pad 3, the front cylinder 4 and the rear cylinder 6 isolate the vibration from the vehicle body from the three directions of X / Y / Z, especially the impact from the X direction, which greatly reduces the impact of the bus caused by people and different road conditions and ensures the stability of the chemical reaction of the battery stack 15.

[0117] Example 3

[0118] like Figure 6 As shown, this embodiment provides an electronic device, including:

[0119] at least one processor; and

[0120] a memory communicatively connected to at least one of the processors; wherein,

[0121] The memory stores instructions executable by at least one of the processors, and the instructions are executed by at least one of the processors to enable at least one of the processors to perform the above method. At least one processor in the electronic device can perform the above method, and thus has at least the same advantages as the above method.

[0122] Optionally, the electronic device also includes an interface for connecting various components, including a high-speed interface and a low-speed interface. Various components are interconnected using different buses and can be installed on a common mainboard or installed in other ways as needed. The processor can process instructions executed in the electronic device, including instructions stored in or on a memory to display graphical information of a GUI (Graphical User Interface) on an external input / output device (such as a display device coupled to an interface). In other embodiments, if necessary, multiple processors can be used together with multiple memories, and / or multiple buses can be used together with multiple memories. Similarly, multiple electronic devices can be connected (for example, as a server array, a group of blade servers, or a multi-processor system), and each device provides some necessary operations. Figure 6 A processor 301 is taken as an example.

[0123] The memory 302 is a computer-readable storage medium that can be used to store software programs, computer executable programs and modules, such as the program instructions / modules corresponding to the new energy vehicle battery stack mounting bracket system optimization method in the embodiment of the present application. The processor 301 executes various functional applications and data processing of the device by running the software programs, instructions and modules stored in the memory 302, that is, realizing the above-mentioned new energy vehicle battery stack mounting bracket system optimization method.

[0124] The memory 302 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system and at least one application required for a function; the data storage area may store data created according to the use of the terminal, etc. In addition, the memory 302 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some instances, the memory 302 may further include a memory remotely arranged relative to the processor 301, and these remote memories may be connected to the device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0125] The electronic device may further include: an input device 303 and an output device 304. The processor 301, the memory 302, the input device 303 and the output device 304 may be connected via a bus or other means. Figure 6 The example of connecting through bus is taken in the following.

[0126] The input device 303 can receive input digital or character information, and the output device 304 can include a display device, an auxiliary lighting device (e.g., LED), and a tactile feedback device (e.g., a vibration motor), etc. The display device can include, but is not limited to, a liquid crystal display (LCD), a light emitting diode (LED) display, and a plasma display. In some embodiments, the display device can be a touch screen.

[0127] Example 4

[0128] This embodiment provides a computer-readable storage medium, on which computer instructions are stored, and the computer instructions are used to enable a computer to execute the above method. The computer instructions on the computer-readable storage medium are used to enable a computer to execute the above method, and thus have at least the same advantages as the above method.

[0129] The medium in this application may adopt any combination of one or more computer-readable media. The medium may be a computer-readable signal medium or a computer-readable storage medium. The medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination thereof. More specific examples of the medium (a non-exhaustive list) include: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In this document, the medium may be any tangible medium containing or storing a program that may be used by or in combination with an instruction execution system, device, or device.

[0130] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, which carry computer-readable program code. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Computer-readable signal media may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0131] The program code contained on the computer-readable medium can be transmitted using any appropriate medium, including but not limited to wireless, wire, optical cable, RF (Radio Frequency), etc., or any suitable combination of the above.

[0132] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages, such as Java, Smalltalk, C++, and conventional procedural programming languages, such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0133] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps recorded in this application can be executed in parallel, sequentially or in different orders, as long as the expected results of the technical solution disclosed in this application can be achieved, and this document is not limited here.

[0134] The above specific implementations do not constitute a limitation on the protection scope of this application. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of this application should be included in the protection scope of this application.

Claims

1. A method for optimizing a new energy vehicle battery stack mounting bracket system, characterized in that: include: Acquire first vibration response data of user conditions and second vibration response data of user conditions, wherein the first vibration response data of user conditions are vibration response data of user conditions at the positions of the battery stack installation cross plate brackets and the battery stacks, and the second vibration response data of user conditions are vibration response data of user conditions at the positions of the battery stacks; Performing independent vector analysis on the first vibration response data of the user working condition to obtain corrected first vibration response data of the user working condition; Determining the vibration contribution of each battery stack mounting cross plate bracket to the battery stack according to the corrected first vibration response data of the user operating condition and the second vibration response data of the user operating condition; Determine the number of cycles of the test field condition according to the total fatigue damage of the user condition, the single fatigue damage of the test field condition, and the user-test field correlation model of the battery stack mounting cross plate bracket at the front target position in descending order according to the vibration contribution; The support system is optimized according to the total fatigue damage of the user working condition, the number of cycles of the test field working condition and the single fatigue damage of the test field working condition.

2. The new energy vehicle battery stack mounting bracket system optimization method according to claim 1 is characterized in that: The performing independent vector analysis on the first vibration response data of the user working condition to obtain the corrected first vibration response data of the user working condition includes: The first vibration response data of the user working condition is subjected to zero mean processing and whitening processing in sequence to obtain a whitening matrix; Calculating the KL divergence between signals according to the whitening matrix; Determining an objective function according to the KL divergence between the signals; The objective function is optimized by using a natural gradient method to obtain a separation matrix; According to the whitening matrix and the separation matrix, the corrected first vibration response data of the user working condition is obtained.

3. The new energy vehicle battery stack mounting bracket system optimization method according to claim 2 is characterized in that: The iterative formula of the separation matrix is: w i,k+1 (f)=w i,k (f)+η k ·{I-E[G′(∑ f |Z i,k (f)| 2 )Z i,k (f) T ]}w i,k (f); Among them, w i,k+1 (f) is the i-th column of the separation matrix W(f) at the k+1th iteration, where k is the number of iterations; w i,k (f) is the i-th column of the separation matrix W(f) at k iterations; η k is the step size parameter; Z i,k (f) T is the transposed form of the whitening matrix; G′ is the first-order derivative of G, G represents square root calculation; E represents mean calculation.

4. The new energy vehicle battery stack mounting bracket system optimization method according to claim 2, characterized in that: The corrected user operating condition first vibration response data S is calculated using the following formula: S=W·Z; wherein W is the separation matrix, and Z is the whitening matrix.

5. The new energy vehicle battery stack mounting bracket system optimization method according to claim 1, characterized in that: The optimizing the support system according to the total fatigue damage of the user working condition, the number of cycles of the test field working condition and the single fatigue damage of the test field working condition comprises: The support system is adjusted multiple times, and according to the number of cycles of the test field working condition and the single fatigue damage of the test field working condition, the total test field working condition damage of the support system after the multiple adjustments is determined; The total damage of the support system under test field conditions and the total fatigue damage of the user conditions after the multiple adjustments are compared to determine the support system that needs to be optimized.

6. The new energy vehicle battery stack mounting bracket system optimization method according to claim 5, characterized in that: The total damage d of the test field condition is calculated using the following formula: Among them, d i is the single fatigue damage of the i-th working condition in the test field, A i is the number of cycles of the i-th working condition in the test field, and p is the total number of working conditions in the test field.

7. A new energy vehicle battery stack mounting bracket system, characterized in that: It is obtained by using the new energy vehicle battery stack mounting bracket system optimization method described in any one of claims 1-6.

8. The new energy vehicle battery stack mounting bracket system according to claim 7, characterized in that: include: Two symmetrically arranged battery stack mounting cross plates, a plurality of battery stack mounting cross plate brackets, a battery stack support plate, an upper slide plate, an upper slide plate connecting bracket, a gear, a rack plate and a bearing; The battery stack mounting transverse plate bracket is arranged on the battery stack mounting transverse plate and is used to be connected to the battery stack; The battery stack support plate is disposed between the two battery stack mounting transverse plates and is used to support the battery stack; The upper slide plate, the upper slide plate connecting bracket, the gear, the rack plate and the bearing are all arranged below the battery stack support plate; the rack plate, the gear, the bearing, the upper slide plate, the upper slide plate connecting bracket and the battery stack support plate are connected in sequence.

9. The new energy vehicle battery stack mounting bracket system according to claim 8, characterized in that: The upper slide plate, the upper slide plate connecting bracket, the gear, the rack plate and the bearing are all arranged on a rigid pad; the rigid pad is used to be connected to the vehicle body; The rigid pad is also provided with an elastic pad and a buckle; The buckle is used to connect the elastic pad, the rack plate and the rigid pad.

10. The new energy vehicle battery stack mounting bracket system according to claim 9, characterized in that: The rigid pad is also provided with a cylinder fixing plate and a cylinder connected to each other; the cylinder fixing plate is also connected to the rigid pad and the upper slide plate respectively.

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