Battery parameter design method and system based on arithmetic progression automatic interpolation

Abstract

The invention provides a battery parameter design method and system based on arithmetic progression automatic interpolation, and relates to the technical field of battery parameter design, and the method comprises the steps: obtaining known parameters and unknown parameters of battery design; constructing a parameter relation equation according to the parameter relation between the known parameters and the unknown parameters of the battery design; determining a key parameter value range interval according to the parameter relation equation, and constructing a battery design parameter table; calculating all possible parameter design values according to the battery design parameter table and the key parameter value range interval; all possible parameter design values are screened, whether the design requirements are met or not is judged, and finally a battery parameter design scheme is obtained. All possible design schemes are directly obtained through calculation, then screening is conducted according to actual design requirements, the complete design scheme can be obtained, and the time of manual attempt can be shortened.

Description

Technical Field

[0001] The present disclosure relates to the technical field of battery parameter design, and specifically to a battery parameter design method and system based on automatic interpolation of arithmetic progressions. Background Art

[0002] The statements in this part merely provide background technical information related to the present disclosure and do not necessarily constitute prior art.

[0003] In traditional battery parameter design methods, manual calculations are performed based on known parameters in a parameter table and general relationships to obtain all parameter values, or the formula is applied to an Excel spreadsheet for calculation using Excel. Among them, manual calculation requires one-by-one comparison and attempt. Each parameter combination can obtain a set of different design parameters, and there is a possibility of calculation errors. Only one set of parameter solutions can be output at a time. This method requires a large amount of manpower and time, and may not be able to obtain all the combination solutions. When the data range is relatively wide, it may also be impossible to find the best matching parameters; when calculating using the built-in formula in Excel, it is necessary to pre-embed the relationship in the table and then manually input the key parameter combinations. Compared with manual calculation, the calculation accuracy is improved and the calculation speed is accelerated, but only one set of parameter solutions can be output at a time, and all possible combination solutions may not be obtained. Summary of the Invention

[0004] To solve the above problems, the present disclosure proposes a battery parameter design method and system based on automatic interpolation of arithmetic progressions. After filling in the known parameters in the design parameter table, the design parameter table is read, and according to the set calculation method, all possible parameters are automatically calculated, and then screened according to the actual design requirements to obtain the final design scheme.

[0005] According to some embodiments, the present disclosure adopts the following technical solutions:

[0006] A battery parameter design method based on automatic interpolation of arithmetic progressions, comprising:

[0007] Obtain known battery design parameters and unknown parameters;

[0008] Construct a parameter relationship equation according to the parameter relationship between the known battery design parameters and the unknown parameters;

[0009] Determine the key parameter value range interval according to the parameter relationship equation and construct a battery design parameter table;

[0010] Calculate all possible parameter design values according to the battery design parameter table and the key parameter value range interval;

[0011] Screen all possible parameter design values to determine whether they meet the design requirements, and finally obtain a battery parameter design scheme.

[0012] According to some embodiments, the present disclosure adopts the following technical solutions:

[0013] A battery parameter design system based on automatic interpolation of arithmetic progressions, comprising:

[0014] A parameter acquisition module for acquiring known and unknown parameters of battery design;

[0015] A preprocessing module for constructing a parameter relationship equation according to the parameter relationship between known and unknown parameters of battery design; determining the numerical range interval of key parameters according to the parameter relationship equation, and constructing a battery design parameter table;

[0016] A calculation module for calculating all possible parameter design values according to the battery design parameter table and the numerical range interval of key parameters;

[0017] A screening module for screening all possible parameter design values, judging whether the design requirements are met, and finally obtaining a battery parameter design scheme.

[0018] According to some embodiments, the present disclosure adopts the following technical solutions:

[0019] A computer program product comprising a computer program which, when executed by a processor, implements the battery parameter design method based on automatic interpolation of arithmetic progressions.

[0020] According to some embodiments, the present disclosure adopts the following technical solutions:

[0021] A non-transitory computer-readable storage medium for storing computer instructions which, when executed by a processor, implement the battery parameter design method based on automatic interpolation of arithmetic progressions.

[0022] According to some embodiments, the present disclosure adopts the following technical solutions:

[0023] An electronic device comprising: a processor, a memory and a computer program; wherein the processor is connected to the memory, the computer program is stored in the memory, and when the electronic device runs, the processor executes the computer program stored in the memory so that the electronic device executes and implements the battery parameter design method based on automatic interpolation of arithmetic progressions.

[0024] Compared with the prior art, the beneficial effects of the present disclosure are:

[0025] The battery parameter design method based on automatic interpolation of arithmetic progression in the present disclosure directly obtains all possible design solutions through a program, replacing repetitive manual calculations. Then, according to actual design requirements, screening is carried out, which can not only obtain a complete design solution, but also reduce the time of manual attempts, and at the same time ensure the calculation accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings forming a part of this disclosure are used to provide a further understanding of the disclosure. The illustrative embodiments and descriptions thereof of the disclosure are used to explain the disclosure and do not constitute an improper limitation of the disclosure.

[0027] Figure 1 It is a flowchart of the battery parameter design method based on automatic interpolation of arithmetic progression for the embodiments of the present disclosure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The present disclosure will be further described below in conjunction with the accompanying drawings and embodiments.

[0029] It should be noted that the following detailed descriptions are all illustrative and are intended to provide further descriptions of the present disclosure. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present disclosure belongs.

[0030] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present disclosure. As used herein, unless otherwise clearly specified in the context, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0031] Embodiment 1

[0032] In an embodiment of the present disclosure, a battery parameter design method based on automatic interpolation of arithmetic progression is provided, and the steps include:

[0033] Step 1: Obtain the known parameters and unknown parameters of the battery design;

[0034] Step 2: Construct a parameter relationship equation according to the parameter relationship between the known parameters and unknown parameters of the battery design;

[0035] Step 3: Determine the numerical range interval of the key parameters according to the parameter relationship equation, and construct a battery design parameter table;

[0036] Step 4: Calculate all possible parameter design values according to the battery design parameter table and the numerical range interval of the key parameters;

[0037] Step 5: Screen all possible parameter design values, determine whether they meet the design requirements, and finally obtain the battery parameter design scheme.

[0038] As an embodiment, the specific implementation process of a battery parameter design method based on automatic interpolation of an arithmetic progression according to the present disclosure is as follows:

[0039] Step 1: Obtain the known parameters and unknown parameters of the battery design;

[0040] Specifically, the basic battery parameters include: battery width, battery thickness, total battery height, battery shoulder height, rated capacity, average voltage, rated energy, mass energy density, volume energy density, ACR, DCR, height of the positive tab, surface density of the positive foil, width of the tab glue, surface density of the tab glue, weight of the positive electrode sheet, height of the negative tab, surface density of the negative foil, weight of the negative electrode sheet, length of the separator, surface density of the separator, weight of the separator, weight of a single cell, total weight of the cells, weight of the internal structural parts, weight of the assembled battery, liquid injection volume per injection, weight of the battery after the first injection, weight of the battery after the second injection, weight of the external insulation parts, weight of the battery, specific capacity of the positive electrode material, length of the positive electrode sheet, width of the positive electrode sheet, number of layers of the positive electrode sheet, coating surface density of the positive electrode, rolling elongation rate of the positive electrode, proportion of the main materials in the positive electrode formula, distance from the thinning position of the positive electrode to the edge, thinning thickness of the positive electrode, thinning percentage of the positive electrode, negative capacity redundancy parameter NP ratio, length dimension redundancy, width dimension redundancy, specific capacity of the negative electrode material, rolling elongation rate of the negative electrode, proportion of the main materials in the negative electrode formula, coating surface density of the negative electrode, length of the negative electrode sheet, width of the negative electrode sheet, number of layers of the negative electrode sheet, distance from the thinning position of the negative electrode to the edge, thinning thickness of the negative electrode, thinning percentage of the negative electrode, separator width - negative electrode length redundancy, separator height - negative electrode width redundancy, porosity of the base film, width of the separator, width of the cell, wall thickness of the large surface, wall thickness of the side, wall thickness of the bottom, thickness of the blue film, thickness of the cell protective film, available internal space of the cell, thickness of the positive foil, compaction density of the positive electrode, thickness of the positive electrode sheet, assembly rebound rate of the positive electrode, shipping rebound rate of the positive electrode, full charge rebound rate of the positive electrode, EOL rebound rate of the positive electrode, thickness of the negative foil, compaction density of the negative electrode, thickness of the negative electrode sheet, assembly rebound rate of the negative electrode, shipping rebound rate of the negative electrode, full charge rebound rate of the negative electrode, EOL rebound rate of the negative electrode, thickness of the separator, number of layers of the separator, thickness of the separator after hot pressing, thickness of the separator with liquid film, number of cells, thickness of the cell in the shell, thickness of a single cell, ratio of shell tightness, thickness of the cell during shipping, shipping tightness ratio, thickness of the cell at full charge, full charge tightness ratio, thickness of the cell at EOL, EOL tightness ratio, liquid injection coefficient, and total liquid injection volume. Specifically, as shown in Table 1.

[0041] Table 1 Basic Battery Parameters

[0042]

[0043]

[0044]

[0045]

[0046]

[0047] Furthermore, the known parameters of the battery include battery width, battery thickness, total battery height, battery shoulder height, average voltage, positive tab height, positive foil areal density, tab adhesive width, tab adhesive areal density, negative tab height, negative foil areal density, separator areal density, weight of internal structural components, weight of external insulation components, specific capacity of the positive electrode material, length of the positive electrode sheet, width of the positive electrode sheet, rolling elongation rate of the positive electrode, distance from the thinning position of the positive electrode to the edge, thinning thickness of the positive electrode, negative capacity redundancy parameter NP ratio, length dimension redundancy, width dimension redundancy, specific capacity of the negative electrode material, rolling elongation rate of the negative electrode, proportion of the main materials in the negative electrode formula, distance from the thinning position of the negative electrode to the edge, thinning thickness of the negative electrode, separator width - negative electrode length redundancy, separator height - negative electrode width redundancy, porosity of the base film, available space inside the battery cell, thickness of the positive foil, assembly rebound rate of the positive electrode, shipping rebound rate of the positive electrode, full charge rebound rate of the positive electrode, EOL rebound rate of the positive electrode, thickness of the negative foil, assembly rebound rate of the negative electrode, shipping rebound rate of the negative electrode, full charge rebound rate of the negative electrode, EOL rebound rate of the negative electrode, thickness of the separator, thickness after hot pressing of the separator, liquid-containing film thickness of the separator, and the number of battery cells. Specifically, as shown in Table 2.

[0048] Table 2 Known Parameters of the Battery

[0049]

[0050]

[0051]

[0052] Step 2: Construct parameter relationship equations based on the parameter relationships between the known and unknown parameters of the battery design, including:

[0053]

[0054] Nf = Nz + Nx

[0055] Ng = Nz + Nf + 3×Nx

[0056]

[0057] hk = Y - 2×(hq + hl + hb)

[0058]

[0059]

[0060] mz = Mz × Lz × Dz + Ma × Dz × (Lz + La) + Mj × Dz × Lj

[0061] mf = Mf × Lf × Df + Mt × Df × (Lf + LC)

[0062] mg = Mg × Lg × Dg

[0063] D g = L f + R3

[0064] L f = L z + R1

[0065] Lg = Dx × Ng + 3 × Y

[0066] D X = D f + R4

[0067] D f = D z + R2

[0068] ms = mz × Nz + mf × Nf + mg

[0069]

[0070] m o = m s + m k

[0071] m1 = m0 + k1

[0072] m2 = m0 + k d

[0073] m = m s + k d + m k + m w

[0074] The unknown parameters can be calculated from the known parameters in Table 2 and the above relationships. As shown in Table 3.

[0075] Table 3 Unknown Parameters

[0076]

[0077]

[0078]

[0079] Step 3: Determine the numerical range interval of the key parameters according to the parameter relationship equation, and construct a battery design parameter table; calculate all possible parameter design values according to the battery design parameter table and the numerical range interval of the key parameters;

[0080] Specifically, in the traditional battery parameter design method, manual calculations are performed based on the known parameters and relationships in Table 2 to obtain all parameter values, or the formula is applied to an excel table for calculation using excel. Among the battery parameters, there are 4 key parameters, namely: the positive electrode coating surface density, the negative electrode coating surface density, the positive electrode compaction density, and the negative electrode compaction density. The values of these four parameters are not fixed values and are generally within a certain interval range, as shown in Table 4.

[0081] Table 4 Key Parameters

[0082] Battery Parameters Code Unit Design Value Maximum Value Minimum Value Positive Electrode Coating Surface Density Mz g / m2 324 300 Negative Electrode Coating Surface Density Mf g / m2 205 190 Positive Electrode Compaction Density pz g / cm3 3.55 3.45 Negative Electrode Compaction Density pf g / cm3 1.65 1.6

[0083] The present disclosure uses the above formula for calculation and parameter solution. Within the given parameter range, automatic interpolation and combination are performed according to an arithmetic sequence with a difference of 0.4, and all possible parameter combinations are directly output, and the results are output in tabular form. The output results are shown in Table 5 (only 5 groups of results are shown).

[0084] Table 5 Output Results

[0085]

[0086]

[0087]

[0088] Step 4: Screen all possible parameter design values to determine whether they meet the design requirements, and finally obtain a battery parameter design scheme. This includes: screening according to the screening criteria. Different screening criteria screen different parameters, which can be the cell shipping thickness, the electrode sheet thickness, the number of electrode sheet layers, the shell insertion tightness ratio, etc. The screening criteria are designed according to the actual design requirements.

[0089] Example 2

[0090] In an embodiment of the present disclosure, a battery parameter design system based on automatic interpolation of an arithmetic sequence is provided, including:

[0091] A parameter acquisition module for acquiring the known parameters and unknown parameters of battery design;

[0092] A preprocessing module for constructing a parameter relationship equation according to the parameter relationship between the known parameters and unknown parameters of battery design; determining the numerical range interval of the key parameters according to the parameter relationship equation, and constructing a battery design parameter table;

[0093] A calculation module, configured to calculate all possible parameter design values according to a battery design parameter table and a key parameter value range interval;

[0094] A screening module, configured to screen all possible parameter design values, determine whether they meet the design requirements, and finally obtain a battery parameter design scheme.

[0095] Embodiment 3

[0096] In an embodiment of the present disclosure, a computer program product is provided, including a computer program, and when the computer program is executed by a processor, the battery parameter design method based on automatic interpolation of an arithmetic progression is implemented.

[0097] Embodiment 4

[0098] In an embodiment of the present disclosure, a non-transitory computer-readable storage medium is provided, and the non-transitory computer-readable storage medium is used to store computer instructions, and when the computer instructions are executed by a processor, the battery parameter design method based on automatic interpolation of an arithmetic progression is implemented.

[0099] Embodiment 5

[0100] In an embodiment of the present disclosure, an electronic device is provided, including: a processor, a memory, and a computer program; wherein, the processor is connected to the memory, the computer program is stored in the memory, and when the electronic device runs, the processor executes the computer program stored in the memory, so that the electronic device executes to implement the battery parameter design method based on automatic interpolation of an arithmetic progression.

[0101] The present disclosure is described with reference to the flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present disclosure. It should be understood that each process and / or block in the flowchart and / or block diagram, and the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate a device for implementing the specified functions in one process Figure 1 one process or multiple processes and / or blocks Figure 1 or multiple blocks.

[0102] These computer program instructions can also be loaded onto a computer or other programmable data processing devices, so that a series of operation steps are executed on the computer or other programmable devices to generate a computer-implemented process, and thus the instructions executed on the computer or other programmable devices provide for implementing in the process Figure 1One process or multiple processes and / or boxes Figure 1 Steps of functions specified in one box or multiple boxes.

[0103] Although the specific embodiments of the present disclosure have been described above in conjunction with the accompanying drawings, they are not limitations on the protection scope of the present disclosure. Those skilled in the art should understand that, based on the technical solutions of the present disclosure, various modifications or deformations that can be made by those skilled in the art without creative efforts are still within the protection scope of the present disclosure.

Claims

1. A battery parameter design method based on automatic interpolation of arithmetic progressions, characterized in that, Including: Obtain the known parameters and unknown parameters of the battery design; Construct a parameter relationship equation according to the parameter relationship between the known parameters and unknown parameters of the battery design; Determine the numerical range interval of the key parameters according to the parameter relationship equation, and construct a battery design parameter table; Calculate all possible parameter design values according to the battery design parameter table and the numerical range interval of the key parameters; Screen all possible parameter design values to determine whether they meet the design requirements, and finally obtain the battery parameter design scheme.

2. The battery parameter design method based on automatic interpolation of arithmetic progression according to claim 1, characterized in that, The basic parameters of the battery include: battery width, battery thickness, total battery height, battery shoulder height, rated capacity, average voltage, rated energy, mass energy density, volume energy density, ACR, DCR, height of the positive electrode tab, surface density of the positive electrode foil, width of the tab glue, surface density of the tab glue, weight of the positive electrode sheet, height of the negative electrode tab, surface density of the negative electrode foil, weight of the negative electrode sheet, length of the separator, surface density of the separator, weight of the separator, weight of a single cell, total weight of the cells, weight of the internal structural parts.

3. The battery parameter design method based on automatic interpolation of arithmetic progression according to claim 2, wherein Also including: Assembled battery weight, amount of liquid injection per injection, battery weight after the first injection, battery weight after the second injection, weight of the external insulation parts, battery weight, specific capacity of the positive electrode material, length of the positive electrode sheet, width of the positive electrode sheet, number of positive electrode layers, surface density of positive electrode coating, rolling elongation rate of the positive electrode, proportion of the main materials in the positive electrode formula, distance from the thinning position of the positive electrode to the edge, thinning thickness of the positive electrode, thinning percentage of the positive electrode, negative capacity redundancy parameter NP ratio, length dimension redundancy, width dimension redundancy, specific capacity of the negative electrode material, rolling elongation rate of the negative electrode, proportion of the main materials in the negative electrode formula, surface density of negative electrode coating, length of the negative electrode sheet, width of the negative electrode sheet, number of negative electrode layers, distance from the thinning position of the negative electrode to the edge, thinning thickness of the negative electrode, thinning percentage of the negative electrode, separator width - negative electrode length redundancy, separator height - negative electrode width redundancy, porosity of the base film, width of the separator, width of the cell, wall thickness of the large surface, wall thickness of the side, wall thickness of the bottom, thickness of the blue film, thickness of the cell protective film, available internal space of the cell, thickness of the positive electrode foil, compaction density of the positive electrode, thickness of the positive electrode sheet, positive electrode assembly rebound rate, positive electrode shipment rebound rate, positive electrode full charge rebound rate, positive electrode EOL rebound rate, thickness of the negative electrode foil, compaction density of the negative electrode, thickness of the negative electrode sheet, negative electrode assembly rebound rate, negative electrode shipment rebound rate, negative electrode full charge rebound rate, negative electrode EOL rebound rate, thickness of the separator, number of separator layers, thickness of the separator after hot pressing, thickness of the separator with liquid, number of cells, thickness of the cell inserted into the shell, thickness of a single cell, insertion tightness ratio of the cell into the shell, thickness of the cell shipped, shipment tightness ratio, thickness of the cell at full charge, full charge tightness ratio, thickness of the cell at EOL, EOL tightness ratio, liquid injection coefficient, and total liquid injection volume.

4. The battery parameter design method based on automatic interpolation of arithmetic progression according to claim 1, characterized in that, The known parameters include: battery width, battery thickness, total battery height, battery shoulder height, average voltage, height of the positive tab, areal density of the positive foil, width of the tab adhesive, areal density of the tab adhesive, height of the negative tab, areal density of the negative foil, areal density of the separator, weight of the internal structural parts, weight of the external insulation parts, specific capacity of the positive electrode material, length of the positive electrode sheet, width of the positive electrode sheet, rolling elongation rate of the positive electrode, distance from the thinning position of the positive electrode to the edge, thinning thickness of the positive electrode, negative capacity redundancy parameter NP ratio, length dimension redundancy, width dimension redundancy, specific capacity of the negative electrode material, rolling elongation rate of the negative electrode, proportion of the main materials in the negative electrode formula, distance from the thinning position of the negative electrode to the edge, thinning thickness of the negative electrode, separator width - negative electrode length redundancy, separator height - negative electrode width redundancy, porosity of the base film, available space inside the battery cell, thickness of the positive foil, positive electrode assembly rebound rate, positive electrode shipment rebound rate, positive electrode full charge rebound rate, positive electrode EOL rebound rate, thickness of the negative foil, negative electrode assembly rebound rate, negative electrode shipment rebound rate, negative electrode full charge rebound rate, negative electrode EOL rebound rate, thickness of the separator, thickness of the separator after hot pressing, thickness of the separator with liquid, and number of battery cells.

5. The battery parameter design method based on automatic interpolation of arithmetic progression according to claim 1, characterized in that The unknown parameters include: rated capacity, rated energy, mass energy density, volume energy density, ACR, DCR, weight of the positive electrode sheet, weight of the negative electrode sheet, length of the separator, weight of the separator, weight of a single battery cell, total weight of the battery cells, weight of the assembled battery, injection volume per injection, weight of the battery after the first injection, weight of the battery after the second injection, weight of the battery, number of layers of the positive electrode sheet, areal density of the positive electrode coating, proportion of the main materials in the positive electrode formula, thinning percentage of the positive electrode, areal density of the negative electrode coating, length of the negative electrode sheet, width of the negative electrode sheet, number of layers of the negative electrode sheet, thinning percentage of the negative electrode, width of the separator, width of the battery cell, wall thickness of the large surface, wall thickness of the side, wall thickness of the bottom, thickness of the blue film, thickness of the battery cell protective film, tap density of the positive electrode, thickness of the positive electrode sheet, tap density of the negative electrode, thickness of the negative electrode sheet, number of layers of the separator, thickness of the battery cell when inserted into the case, thickness of a single battery cell, insertion tightness ratio, thickness of the battery cell during shipment, shipment tightness ratio, thickness of the battery cell at full charge, full charge tightness ratio, thickness of the battery cell at EOL, EOL tightness ratio, and injection coefficient.

6. The battery parameter design method based on automatic interpolation of arithmetic progression according to claim 1, characterized in that, The key parameters include four parameters, namely, areal density of the positive electrode coating, areal density of the negative electrode coating, tap density of the positive electrode, and tap density of the negative electrode. The values of these four parameters are not fixed values but within a certain range. Within the given parameter range, automatic interpolation and combination are performed according to an arithmetic progression with a difference of 0.4, and all possible parameter combinations are directly output and presented in tabular form.

7. A battery parameter design system based on automatic interpolation of arithmetic progression, characterized in that, Including: A parameter acquisition module for acquiring known parameters and unknown parameters of battery design; A preprocessing module for constructing a parameter relationship equation based on the parameter relationships between the known parameters and unknown parameters of battery design; Determine the numerical range interval of the key parameters according to the parameter relationship equation and construct a battery design parameter table; A calculation module for calculating all possible parameter design values according to the battery design parameter table and the numerical range interval of the key parameters; A screening module for screening all possible parameter design values to determine whether they meet the design requirements, and finally obtaining a battery parameter design scheme.

8. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the battery parameter design method based on automatic interpolation of arithmetic progression according to any one of claims 1-6.

9. A non-transitory computer-readable storage medium, characterized in that, The non-transitory computer-readable storage medium is used to store computer instructions, which, when executed by a processor, implement the battery parameter design method based on automatic interpolation of arithmetic progression according to any one of claims 1-6.

10. An electronic device, characterized in that, Comprising: A processor, a memory, and a computer program; wherein the processor is connected to the memory, the computer program is stored in the memory, and when the electronic device runs, the processor executes the computer program stored in the memory so that the electronic device executes and implements the battery parameter design method based on automatic interpolation of arithmetic progression according to any one of claims 1-6.

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