Method for Determining Parameters of Filter Component for Wireless Charging of New Energy Vehicles and Filter Component

Abstract

The present invention provides a method for determining parameters of a filtering component for wireless charging of new energy vehicles and the filtering component, belonging to the technical field of electrical equipment, and solves the performance problem in the wireless charging state of new energy vehicles. The method includes: obtaining the basic index parameters of the filtering component for wireless charging of new energy vehicles in the wireless charging state; obtaining the operating state data of the filtering component in the wireless charging state according to the basic index parameters; obtaining the magnetic ring index parameters of multiple magnetic rings of the filtering component according to the basic index parameters and the operating state data; and obtaining the preparation parameters of the filtering component according to the magnetic ring index parameters of multiple magnetic rings of the filtering component and the wireless charging operation parameters. This solution obtains a filtering component that meets the application requirements of wireless charging of new energy vehicles through precise control of the magnetic ring parameters, and improves the qualified rate of the filtering component products.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical equipment, in particular to a method for determining parameters of a filtering component for wireless charging of new energy vehicles and the filtering component. Background Art

[0002] The filtering component is a core device to ensure that the new energy vehicle will not interfere with in-vehicle electronic devices or the external power grid during wireless charging. The filtering component works in coordination with the power conversion circuit, resonance coil, etc., undertaking the core function of suppressing conducted and radiated interference, being able to control the noise source, filter by frequency band, and effectively filter differential-mode and common-mode noises on the power line.

[0003] Currently, when determining the preparation parameters of the filtering component, especially the magnetic ring parameters, they are usually set based on empirical values. However, the limitations of this method relying on empirical values are becoming increasingly prominent. First of all, empirical values are often based on past technical levels and application scenarios, and may not accurately reflect the development trends of current and future technologies. With the continuous innovation of new energy vehicle technologies, new materials and new processes emerge in an endless stream, and these changes directly affect the performance requirements and preparation conditions of the filtering component. For example, the application of new magnetic materials may require more refined adjustment of the magnetic ring parameters to achieve the best filtering effect. Secondly, the requirements of some special working conditions and new application scenarios are becoming increasingly prominent. For example, in a new energy vehicle traveling at high speed, the filtering component needs to withstand higher electromagnetic interference pressure; while in an autonomous driving system, the performance requirements for the filtering component are even more stringent, and any tiny electromagnetic interference may affect the stability and safety of the system. These special requirements clearly exceed the scope covered by traditional empirical values, and there is an urgent need for a more scientific and accurate parameter setting method. Summary of the Invention

[0004] The present invention provides a method for determining parameters of a filtering component for wireless charging of new energy vehicles and the filtering component, solving the performance problems in the wireless charging state of new energy vehicles.

[0005] To solve the above technical problems, the technical solution of the present invention is as follows:

[0006] An embodiment of the present invention provides a method for determining parameters of a filtering component for wireless charging of new energy vehicles, including:

[0007] Obtain the basic index parameters of the filtering component for wireless charging of new energy vehicles in the wireless charging state; the filtering component includes: a first copper bar main body, a second copper bar main body, a first copper bar branch integrally formed with the first copper bar main body, and a second copper bar branch integrally formed with the second copper bar main body. A plurality of first-type magnetic rings are sleeved outside the first copper bar main body and the second copper bar main body, a plurality of second-type magnetic rings are sleeved outside the first copper bar branch, and a plurality of third-type magnetic rings are sleeved outside the second copper bar branch; the inner diameter of the first-type magnetic ring is larger than that of the second-type magnetic ring and the third-type magnetic ring;

[0008] Obtain the operating state data of the filtering component in the wireless charging state according to the basic index parameters;

[0009] Obtain the magnetic ring index parameters of multiple magnetic rings of the filtering component according to the basic index parameters and the operating state data;

[0010] Obtain the preparation parameters of the filtering component according to the magnetic ring index parameters of multiple magnetic rings of the filtering component and the wireless charging operation parameters.

[0011] Optionally, obtaining the basic index parameters of the filtering component for wireless charging of new energy vehicles in the wireless charging state includes:

[0012] Extract the basic index parameters of the filtering component from the design model of the filtering component for wireless charging of new energy vehicles, where the basic index parameters include at least one of the size data, passband bandwidth data, rated current data, and rated voltage data of the filtering component.

[0013] Optionally, obtaining the operating state data of the filtering component in the wireless charging state according to the basic index parameters includes:

[0014] Obtain the insertion loss data of the filtering component in the wireless charging state according to the passband bandwidth data;

[0015] Obtain the impedance data of the filtering component in the wireless charging state according to the insertion loss data.

[0016] Optionally, obtaining the magnetic ring index parameters of multiple magnetic rings of the filtering component according to the basic index parameters and the operating state data includes:

[0017] Obtain the size data of multiple magnetic rings of the filtering component according to the size data of the filtering component;

[0018] Obtain the magnetic ring index parameters of multiple magnetic rings of the filtering component according to the insertion loss data and the impedance data.

[0019] Optionally, based on the size data of the filtering component, the size data of multiple magnetic rings of the filtering component is obtained, including:

[0020] Based on

[0021] , the outer radius data of the i-th type of magnetic ring is obtained;

[0022] Based on

[0023] , the inner radius data of the i-th type of magnetic ring is obtained;

[0024] Based on

[0025] , the length data of the i-th type of magnetic ring is obtained;

[0026] where r i1 is the outer radius data of the i-th type of magnetic ring, r i2 is the inner radius data of the i-th type of magnetic ring, l i is the length data of the i-th type of magnetic ring, L i is the length of the i-th copper busbar branch, M i is the width of the i-th copper busbar branch, N i is the height of the i-th copper busbar branch, min(L i , M i , N i ) is the minimum value of the length, width and height of the i-th copper busbar branch, i = 1, 2, 3.

[0027] Optionally, based on the magnetic ring index parameters of multiple magnetic rings of the filtering component and the wireless charging operation parameters, the preparation parameters of the filtering component are obtained, including:

[0028] Based on the impedance data, the inductance data of the magnetic ring of the filtering component is obtained;

[0029] Based on: , the magnetic permeability data of the magnetic ring of the filtering component is obtained;

[0030] Based on the insertion loss data, impedance data and magnetic permeability data, the parameter data of multiple magnetic rings of the filtering component is obtained;

[0031] where μ r is the magnetic permeability data of the magnetic ring of the filtering component; L is the inductance data of the magnetic ring of the filtering component; μ 0 is the magnetic permeability of vacuum; N is the number of winding turns, N = 1; l m is the magnetic path length; A is the cross-sectional area of the magnetic ring.

[0032] Optionally, based on the magnetic ring index parameters of multiple magnetic rings of the filtering component and the wireless charging operation parameters, the preparation parameters of the filtering component are obtained, including:

[0033] Adjust the basic index parameters of the filtering component according to the magnetic ring index parameters of multiple magnetic rings of the filtering component and the wireless charging operation parameters to obtain the preparation parameters of the filtering component.

[0034] An embodiment of the present invention further provides a device for determining parameters of a filtering component for wireless charging of a new energy vehicle, including:

[0035] An acquisition module, configured to acquire the basic index parameters of a filtering component for wireless charging of a new energy vehicle in a wireless charging state; the filtering component includes: a first copper bar main body, a second copper bar main body, a first copper bar branch integrally formed with the first copper bar main body, a second copper bar branch integrally formed with the second copper bar main body, a plurality of first-type magnetic rings are sleeved outside the first copper bar main body and the second copper bar main body, a plurality of second-type magnetic rings are sleeved outside the first copper bar branch, and a plurality of third-type magnetic rings are sleeved outside the second copper bar branch; the inner diameter of the first-type magnetic ring is greater than that of the second-type magnetic ring and the third-type magnetic ring;

[0036] A processing module, configured to obtain the operation state data of the filtering component in the wireless charging state according to the basic index parameters; obtain the magnetic ring index parameters of multiple magnetic rings of the filtering component according to the basic index parameters and the operation state data; obtain the preparation parameters of the filtering component according to the magnetic ring index parameters of multiple magnetic rings of the filtering component and the wireless charging operation parameters.

[0037] An embodiment of the present invention further provides a computing device, including: a processor and a memory storing a computer program, and when the computer program is run by the processor, the above method is executed.

[0038] An embodiment of the present invention further provides a filtering component, and the filtering component is made according to the preparation parameters of the new energy vehicle filtering component in the above method.

[0039] The above solution of the present invention has at least the following beneficial effects:

[0040] The solution of the present invention obtains the basic index parameters of a filtering component for wireless charging of a new energy vehicle in a wireless charging state; obtains the operation state data of the filtering component in the wireless charging state according to the basic index parameters; obtains the magnetic ring index parameters of multiple magnetic rings of the filtering component according to the basic index parameters and the operation state data; obtains the preparation parameters of the filtering component according to the magnetic ring index parameters of multiple magnetic rings of the filtering component and the wireless charging operation parameters. This solution obtains a filtering component that meets the application requirements of wireless charging of new energy vehicles through precise control of magnetic ring parameters, improving the performance and qualification rate of the filtering component products. Description of the Drawings

[0041] Figure 1 It is a flowchart of a method for determining parameters of a filter component for wireless charging of a new energy vehicle provided by an embodiment of the present invention;

[0042] Figure 2 It is a structural diagram of a device for determining parameters of a filter component for wireless charging of a new energy vehicle provided by an embodiment of the present invention;

[0043] Figure 3 It is a schematic structural diagram of a computing device provided by an embodiment of the present invention.

[0044] Figure 4 It is a structural diagram of a filter component for wireless charging of a new energy vehicle provided by an embodiment of the present invention;

[0045] Among them, 1. The main body of the first copper bar; 2. The first branch of the copper bar; 3. The second branch of the copper bar; 4. The first type of magnetic ring; 5. The second type of magnetic ring; 6. The third type of magnetic ring; 7. The main body of the second copper bar. Detailed implementation manners

[0046] Hereinafter, exemplary embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present invention can be more thoroughly understood and the scope of the present invention can be completely conveyed to those skilled in the art.

[0047] As Figure 1 shown, an embodiment of the present invention provides a method for determining parameters of a filter component for wireless charging of a new energy vehicle, including:

[0048] Step 11, obtaining basic index parameters of a filter component for wireless charging of a new energy vehicle in a wireless charging state; the filter component includes: a main body of a first copper bar, a main body of a second copper bar, a first branch of the copper bar integrally formed with the main body of the first copper bar, and a second branch of the copper bar integrally formed with the main body of the second copper bar. A plurality of first type magnetic rings are sleeved outside the main body of the first copper bar and the main body of the second copper bar, a plurality of second type magnetic rings are sleeved outside the first branch of the copper bar, and a plurality of third type magnetic rings are sleeved outside the second branch of the copper bar; the inner diameter of the first type magnetic ring is larger than that of the second type magnetic ring and the third type magnetic ring;

[0049] Step 12, obtaining operation state data of the filter component in a wireless charging state according to the basic index parameters;

[0050] Step 13, obtaining magnetic ring index parameters of a plurality of magnetic rings of the filter component according to the basic index parameters and the operation state data;

[0051] Step 14: Obtain the preparation parameters of the filtering component according to the magnetic ring index parameters of the multiple magnetic rings of the filtering component and the wireless charging operation parameters.

[0052] In this embodiment, the filtering component mainly consists of a first copper bar main body, a second copper bar main body, a first copper bar branch integrally formed with the first copper bar main body, and a second copper bar branch integrally formed with the second copper bar main body. This integrally formed design helps to ensure the stability and continuity of current transmission, and reduce the resistance and energy loss caused by excessive connection points. Among them, the copper bar main body serves as the main channel for current transmission and bears most of the current; the first and second copper bar branches can shunt and adjust the current according to the specific circuit design and filtering requirements to achieve a better filtering effect; the first type of magnetic ring is sleeved outside the copper bar main body and the number is multiple. Its inner diameter is larger than that of the second type of magnetic ring and the third type of magnetic ring. The larger inner diameter enables the first type of magnetic ring to adapt to the size of the copper bar main body, and the setting of multiple magnetic rings can enhance the suppression effect on the magnetic field generated by the current on the copper bar main body. The second type of magnetic ring is sleeved outside the first copper bar branch, and multiple second type of magnetic rings work together to filter the current on the first copper bar branch. The third type of magnetic ring is sleeved outside the second copper bar branch, and multiple third type of magnetic rings can filter the current on the second copper bar branch.

[0053] The basic index parameters include current parameters, voltage parameters, frequency parameters, and the spatial dimension parameters of the filtering component. Among them, the current parameters include the rated current, maximum current, current fluctuation range, etc. during charging, the voltage parameters include the charging voltage, voltage stability, etc. The stability of the voltage will affect the normal operation of the filtering component, and too high or too low voltage may lead to a decrease in the filtering effect; the frequency parameters include the current frequency involved in the wireless charging process, and different frequencies may require different filtering strategies.

[0054] By analyzing the basic index parameters, the operation state data of the filtering component in the wireless charging state can be obtained. The operation state data includes magnetic field data and power loss data. Among them, by analyzing the magnetic field data, the filtering effect of the magnetic ring can be evaluated, and the power loss during the charging process of the filtering component can be calculated, which helps to evaluate the efficiency of the filtering component and determine whether there is abnormal energy loss.

[0055] By analyzing the basic index parameters and operating status data, the magnetic ring index parameters of multiple magnetic rings of the filtering component can be obtained, including magnetic permeability, magnetic field strength, etc. Among them, the magnetic permeability reflects the response ability of the magnetic ring to the magnetic field. Different magnetic permeabilities are applicable to different frequency ranges. According to the frequency parameters and magnetic field data during charging, a magnetic ring with a suitable magnetic permeability can be selected; when the magnetic flux density in the magnetic ring reaches the saturation value, the filtering effect of the magnetic ring will decrease significantly. Therefore, it is necessary to determine the saturation magnetic flux density of the magnetic ring according to the current and magnetic field strength during charging to avoid magnetic ring saturation.

[0056] According to the magnetic ring index parameters and wireless charging operation parameters, the preparation parameters can be determined, including: magnetic ring material, magnetic ring size and quantity. Among them, according to the index parameters such as the magnetic permeability, saturation magnetic flux density and Curie temperature of the magnetic ring, a suitable magnetic ring material is selected. Common magnetic ring materials include ferrite, permalloy, etc., and different materials have different performance characteristics; according to the structure and filtering requirements of the filtering component, the size and quantity of the magnetic ring are determined. For example, for larger current and stronger magnetic field interference, it may be necessary to increase the number of magnetic rings or select magnetic rings with larger sizes.

[0057] The above technical solution of the present invention obtains a filtering component that meets the requirements of new energy vehicle wireless charging applications by precisely controlling the magnetic ring parameters, improving the performance and qualification rate of the filtering component products.

[0058] In an optional embodiment of the present invention, step 11 may include:

[0059] Step 111, extract the basic index parameters of the filtering component from the design model of the filtering component for wireless charging of new energy vehicles, where the basic index parameters include at least one of the size data, passband bandwidth data, rated current data, and rated voltage data of the filtering component.

[0060] In this embodiment, the basic index parameters of the filtering component can be obtained by retrieving and querying the design model of the new energy vehicle; the design model of the new energy vehicle is created based on CAD (Computer Aided Design) software, and the specific parameters of each component part of the filtering component are recorded in this model, such as the size data of the filtering component, the passband bandwidth data, the rated current data, the rated voltage data, etc.; among them, the size data of the filtering component includes the type of copper bar, the length of various copper bars, the overall length, width and height data of the filtering component, etc.; the passband bandwidth refers to the frequency range allowed to pass through the filtering component. In new energy vehicles, different power systems and components have different requirements for frequency response. Therefore, it is necessary to determine the passband bandwidth of the filtering component according to the specific application scenarios of the new energy vehicle (such as battery charging, motor drive, etc.) to ensure that it can effectively filter out unwanted frequency components; the rated current refers to the maximum current value that the filtering component can withstand under normal working conditions; the selection of this parameter is directly related to the thermal management, electrical safety and long-term reliability of the filtering component. The rated voltage refers to the maximum voltage value that the filtering component can withstand under normal working conditions. Similar to the rated current, the selection of the rated voltage is also based on factors such as the voltage level of the new energy vehicle power system, safety standards and the insulation performance of the component. Ensuring that the rated voltage of the filtering component meets or exceeds the maximum voltage demand in actual applications is the key to ensuring the safe operation of the system.

[0061] In an alternative embodiment of the present invention, step 12 may include:

[0062] Step 121, obtaining the insertion loss data of the filtering component in the wireless charging state according to the passband bandwidth data;

[0063] Step 122, obtaining the impedance data of the filtering component in the wireless charging state according to the insertion loss data.

[0064] In this embodiment, first, the passband bandwidth data, the stopband attenuation and the standard limit value are determined through the frequency range allowed to pass through the filter in the design model of the new energy vehicle; and according to the type of noise (common mode / differential mode), structures such as LC, π-type, T-type, etc. are selected for the filter; the initial values of the inductor and capacitor are determined through the cut-off frequency formula; then the loss values at each frequency point are calculated to obtain the insertion loss data of the filtering component. Among them, the insertion loss data is the ratio of the load power before and after the filter is connected, and the expression is:

[0065]

[0066] where IL is the insertion loss, P in is the load power before the filter is connected, P out is the load power after the filter is connected, S 21 is the transmission coefficient;

[0067] The insertion loss is closely related to the input / output impedance matching of the filter. If the source impedance, load impedance, and filter impedance do not match, reflection will occur, reducing the filtering efficiency.

[0068] According to:

[0069]

[0070] The reflection coefficient of the filtering component is obtained, where Γ is the reflection coefficient, Z 0 is the characteristic impedance of the system, usually taken as 50Ω, and Z filter is the filter impedance; the reflection coefficient is the first element S 11 in the S-parameters of the filter, that is, Γ = S 11 ; according to S 11 and S 21 the S-parameters of the filter are obtained (S 11 , 1, S 21 , 1),

[0071] According to:

[0072]

[0073] The impedance data of the filtering component is obtained, where Z is the impedance of the filtering component and I is the identity matrix.

[0074] In an alternative embodiment of the present invention, step 13 may include:

[0075] Step 131, obtaining the size data of multiple magnetic rings of the filtering component according to the size data of the filtering component;

[0076] Step 132, obtaining the magnetic ring index parameters of multiple magnetic rings of the filtering component according to the insertion loss data and impedance data.

[0077] In this embodiment, obtaining the size data of multiple magnetic rings of the filtering component according to the size data of the filtering component includes:

[0078] According to

[0079] , the outer radius data of the i-th type of magnetic ring is obtained;

[0080] According to

[0081] , the inner radius data of the i-th type of magnetic ring is obtained;

[0082] According to

[0083] , the length data of the i-th type of magnetic ring is obtained;

[0084] According to

[0085] , obtain the number of the i-th type of magnetic rings;

[0086] wherein, r i1 is the outer radius data of the i-th type of magnetic ring, r i2 is the inner radius data of the i-th type of magnetic ring, l i is the length data of the i-th type of magnetic ring, L i is the length of the i-th copper busbar branch, M i is the width of the i-th copper busbar branch, N i is the height of the i-th copper busbar branch, min(L i , M i , N i ) is the minimum value of the length, width and height of the i-th copper busbar branch, i = 1, 2, 3; n i is the number of the i-th type of magnetic rings, and F() is the floor function.

[0087] According to the insertion loss data and impedance data, obtain the magnetic ring index parameters of multiple magnetic rings of the filter component, including:

[0088] According to the impedance data, obtain the inductance data of the magnetic rings of the filter component;

[0089] According to: , obtain the magnetic permeability data of the magnetic rings of the filter component;

[0090] wherein, μ r is the magnetic permeability data of the magnetic rings of the filter component; L is the inductance data of the magnetic rings of the filter component; μ 0 is the magnetic permeability of vacuum; N is the number of winding turns, N = 1; l m is the magnetic path length; A is the cross-sectional area of the magnetic ring.

[0091] According to:

[0092] B = μ 0 μ r H, obtain the magnetic induction intensity of the magnetic rings of the filter component;

[0093] wherein, H is the magnetic field strength and B is the magnetic induction intensity;

[0094] Then, determine the parameter data of the magnetic rings through the magnetic induction intensity, magnetic permeability data and impedance data to determine the material for preparing the magnetic rings; specifically, it can be determined by querying the parameter table of magnetic materials.

[0095] Table 1 Parameter Table of Magnetic Materials

[0096]

[0097] In an alternative embodiment of the present invention, step 14 may include:

[0098] Step 141: Adjust the basic index parameters of the filtering component according to the magnetic ring index parameters of multiple magnetic rings of the filtering component and the wireless charging operation parameters, so as to obtain the preparation parameters of the filtering component.

[0099] In the above embodiment of the present invention, when designing the structure of the filtering component for wireless charging of new energy vehicles, according to the working frequency and output power of the wireless charging system, by adjusting the number, shape and arrangement of magnetic rings, the inductance of the filtering component can be changed, so as to meet the requirements of the wireless charging system; by adjusting the impedance value, the energy loss and filtering effect can be controlled, and the performance of the filtering component during wireless charging is improved.

[0100] As Figure 2 shown, the embodiment of the present invention also provides a device 20 for determining parameters of a filtering component for wireless charging of new energy vehicles, including:

[0101] An acquisition module 21, configured to acquire the basic index parameters of the filtering component for wireless charging of new energy vehicles in a wireless charging state; the filtering component includes: a first copper bar main body, a second copper bar main body, a first copper bar branch integrally formed with the first copper bar main body, a second copper bar branch integrally formed with the second copper bar main body, a plurality of first-type magnetic rings are sleeved outside the first copper bar main body and the second copper bar main body, a plurality of second-type magnetic rings are sleeved outside the first copper bar branch, and a plurality of third-type magnetic rings are sleeved outside the second copper bar branch; the inner diameter of the first-type magnetic ring is larger than that of the second-type magnetic ring and the third-type magnetic ring;

[0102] A processing module 22, configured to obtain the operation state data of the filtering component in a wireless charging state according to the basic index parameters; obtain the magnetic ring index parameters of multiple magnetic rings of the filtering component according to the basic index parameters and the operation state data; obtain the preparation parameters of the filtering component according to the magnetic ring index parameters of multiple magnetic rings of the filtering component and the wireless charging operation parameters.

[0103] Optionally, the acquisition module 21 is specifically configured to:

[0104] Extract the basic index parameters of the filtering component from the design model of the filtering component for wireless charging of new energy vehicles, where the basic index parameters include at least one of the size data, passband bandwidth data, rated current data, and rated voltage data of the filtering component.

[0105] Optionally, the processing module 22 is specifically configured to:

[0106] Based on the passband bandwidth data, obtain the insertion loss data of the filtering component in the wireless charging state;

[0107] Based on the insertion loss data, obtain the impedance data of the filtering component in the wireless charging state.

[0108] Optionally, the processing module 22 is further specifically configured to:

[0109] Based on the size data of the filtering component, obtain the size data of multiple magnetic rings of the filtering component;

[0110] Based on the insertion loss data and the impedance data, obtain the magnetic ring parameter indexes of multiple magnetic rings of the filtering component.

[0111] Optionally, based on the size data of the filtering component, obtaining the size data of multiple magnetic rings of the filtering component includes:

[0112] Based on

[0113] , obtain the outer radius data of the i-th type of magnetic ring;

[0114] Based on

[0115] , obtain the inner radius data of the i-th type of magnetic ring;

[0116] Based on

[0117] , obtain the length data of the i-th type of magnetic ring;

[0118] Wherein, r i1 is the outer radius data of the i-th type of magnetic ring, r i2 is the inner radius data of the i-th type of magnetic ring, l i is the length data of the i-th type of magnetic ring, L i is the length of the i-th copper busbar branch, M i is the width of the i-th copper busbar branch, N i is the height of the i-th copper busbar branch, min(L i , M i , N i ) is the minimum value of the length, width and height of the i-th copper busbar branch, i = 1, 2, 3.

[0119] Optionally, based on the insertion loss data and the impedance data, obtaining the magnetic ring parameter indexes of multiple magnetic rings of the filtering component includes:

[0120] Based on the impedance data, obtain the inductance data of the magnetic ring of the filtering component;

[0121] Based on: , obtain the magnetic permeability data of the magnetic ring of the filtering component;

[0122] Based on the insertion loss data, impedance data, and permeability data, parameter data of multiple magnetic cores of the filtering component are obtained;

[0123] where, μ r is the permeability data of the magnetic core of the filtering component; L is the inductance data of the magnetic core of the filtering component; μ 0 is the permeability of free space; N is the number of winding turns, N = 1; l m is the magnetic path length; A is the cross-sectional area of the magnetic core.

[0124] Optionally, the processing module 22 is further specifically configured to:

[0125] Adjust the basic index parameters of the filtering component according to the magnetic core index parameters of multiple magnetic cores of the filtering component and the wireless charging operation parameters to obtain the preparation parameters of the filtering component.

[0126] It should be noted that this device corresponds to the above method. All implementation manners in the above method embodiments are applicable to this embodiment and can achieve the same technical effects.

[0127] As Figure 3 shown, an embodiment of the present invention further provides a computing device 30, including a processor 31, a memory 32, a program or instruction stored on the memory 32 and executable on the processor 31. When the program or instruction is executed by the processor 31, each process of the embodiment of the method for determining parameters of a filtering component for wireless charging of a new energy vehicle is implemented, and the same technical effects can be achieved. To avoid repetition, details are not described here again. It should be noted that the computing device in the embodiment of the present invention includes the above-mentioned mobile electronic device and non-mobile electronic device.

[0128] As Figure 4 shown, an embodiment of the present invention further provides a filtering component, and the filtering component is made of the preparation parameters obtained by the above method.

[0129] In this embodiment, a filter component for wireless charging of new energy vehicles, which is made according to the parameters of the filter component determined by the above method, includes a first copper bar main body 1, a second copper bar main body 7, a first copper bar branch 2 integrally formed with the first copper bar main body 1, and a second copper bar branch 3 integrally formed with the second copper bar main body 7. A plurality of first-type magnetic rings 4 are sleeved outside the first copper bar main body 1 and the second copper bar main body 7, a plurality of second-type magnetic rings 5 are sleeved outside the first copper bar branch 2, and a plurality of third-type magnetic rings 6 are sleeved outside the second copper bar branch 3. The inner diameter of the first-type magnetic ring 4 is larger than that of the second-type magnetic ring 5 and the third-type magnetic ring 6. The first copper bar main body 1 and the second copper bar main body 7 are separated and insulated by a plastic spacer, and are glued and fixed during assembly and then sleeved with magnetic rings. By precisely controlling the parameters of the magnetic rings, a filter component that meets the requirements of wireless charging applications for new energy vehicles is obtained, improving the performance and qualification rate of the filter component product during wireless charging.

[0130] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or by a combination of computer software and electronic hardware. Whether these functions are executed in hardware or software depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

[0131] Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments, and will not be described herein again.

[0132] In the embodiments provided by the present invention, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of units is only a logical function division, and there may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in an electrical, mechanical, or other form.

[0133] The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0134] In addition, in each embodiment of the present invention, each functional unit may be integrated into a processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.

[0135] Stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods of the various embodiments of the present invention. The aforementioned storage medium includes: various media such as USB flash drives, mobile hard disks, ROM, RAM, magnetic disks, or optical discs that can store program codes.

[0136] In addition, it should be noted that in the devices and methods of the present invention, obviously, each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent solutions of the present invention. And, the steps of performing the above series of processes can naturally be executed in chronological order according to the described order, but it is not necessary to execute them in chronological order. Some steps can be executed in parallel or independently of each other. For those of ordinary skill in the art, it is possible to understand that all or any step or component of the method and device of the present invention can be implemented in any computing device (including a processor, a storage medium, etc.) or a network of computing devices in the form of hardware, firmware, software, or a combination thereof, which can be achieved by those of ordinary skill in the art using their basic programming skills after reading the description of the present invention.

[0137] Therefore, the object of the present invention can also be achieved by running a program or a set of programs on any computing device. The computing device can be a well-known general-purpose device. Therefore, the object of the present invention can also be achieved only by providing a program product containing program codes for implementing the method or device. That is to say, such a program product also constitutes the present invention, and the storage medium storing such a program product also constitutes the present invention. Obviously, the storage medium can be any well-known storage medium or any storage medium developed in the future. It should also be noted that in the devices and methods of the present invention, obviously, each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent solutions of the present invention. And, the steps of performing the above series of processes can naturally be executed in chronological order according to the described order, but it is not necessary to execute them in chronological order. Some steps can be executed in parallel or independently of each other.

[0138] The above are the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A method for determining parameters of a filter component for wireless charging of a new energy vehicle, characterized in that: include: Obtain basic index parameters of a filter assembly for wireless charging of new energy vehicles in a wireless charging state; the filter assembly includes: a first copper bar main body, a second copper bar main body, and a first copper bar branch integrally formed with the first copper bar main body, and a second copper bar branch integrally formed with the second copper bar main body, the first copper bar main body and the second copper bar main body are provided with a plurality of first-type magnetic rings on their outer jackets, the first copper bar branch is provided with a plurality of second-type magnetic rings on its outer jackets, and the second copper bar branch is provided with a plurality of third-type magnetic rings on its outer jackets; the inner diameter of the first-type magnetic ring is greater than that of the second-type magnetic ring and the third-type magnetic ring; According to the basic indicator parameters, the operating state data of the filter component in the wireless charging state is obtained; According to the basic index parameters and the operating status data, obtaining magnetic ring index parameters of multiple magnetic rings of the filter assembly; According to the magnetic ring index parameters of the multiple magnetic rings of the filter assembly and the wireless charging operation parameters, the preparation parameters of the filter assembly are obtained.

2. The method for determining parameters of a filter component for wireless charging of a new energy vehicle according to claim 1, characterized in that: Obtain the basic index parameters of the filter components used for wireless charging of new energy vehicles in the wireless charging state, including: From a design model of a filter component for wireless charging of a new energy vehicle, basic index parameters of the filter component are extracted, wherein the basic index parameters include at least one of size data, passband bandwidth data, rated current data, and rated voltage data of the filter component.

3. The method for determining parameters of a filter component for wireless charging of a new energy vehicle according to claim 2, characterized in that: According to the basic indicator parameters, the operating state data of the filter component in the wireless charging state is obtained, including: According to the passband bandwidth data, obtaining insertion loss data of the filter component in a wireless charging state; According to the insertion loss data, impedance data of the filter component in the wireless charging state is obtained.

4. The method for determining parameters of a filter component for wireless charging of a new energy vehicle according to claim 3, characterized in that: According to the basic index parameters and the operating status data, magnetic ring index parameters of multiple magnetic rings of the filter assembly are obtained, including: According to the size data of the filter assembly, the size data of multiple magnetic rings of the filter assembly are obtained; According to the insertion loss data and impedance data, magnetic ring index parameters of multiple magnetic rings of the filter component are obtained.

5. The method for determining parameters of a filter component for wireless charging of a new energy vehicle according to claim 4, characterized in that: According to the size data of the filter assembly, the size data of multiple magnetic rings of the filter assembly are obtained, including: according to , get the outer radius data of the i-th type magnetic ring; according to , get the inner radius data of the i-th type magnetic ring; according to , get the length data of the i-th type magnetic ring; Among them, r i1 is the outer radius data of the i-th type magnetic ring, r i2 is the inner radius data of the i-th type magnetic ring, l i is the length data of the i-th type magnetic ring, L i is the length of the i-th copper bar branch, M i is the width of the i-th copper bar branch, N i is the height of the i-th copper bar branch, min(L i , M i , N i ) is the minimum value of the length, width and height of the i-th copper busbar branch, i=1, 2, 3.

6. The method for determining parameters of a filter component for wireless charging of a new energy vehicle according to claim 4, characterized in that: According to the insertion loss data and impedance data, magnetic ring index parameters of multiple magnetic rings of the filter assembly are obtained, including: According to the impedance data, the inductance data of the magnetic ring of the filter component is obtained; according to: , obtain the magnetic permeability data of the magnetic ring of the filter component; Obtaining parameter data of multiple magnetic rings of the filter assembly according to the insertion loss data, impedance data and magnetic permeability data; Among them, μ r is the magnetic permeability data of the magnetic ring of the filter component; L is the inductance data of the magnetic ring of the filter component; μ0 is the vacuum magnetic permeability; N is the number of winding turns, N=1; l m is the length of the magnetic circuit; A is the cross-sectional area of ​​the magnetic ring.

7. The method for determining parameters of a filter component for wireless charging of a new energy vehicle according to claim 1, characterized in that: According to the magnetic ring index parameters of the plurality of magnetic rings of the filter assembly and the wireless charging operation parameters, the preparation parameters of the filter assembly are obtained, including: According to the magnetic ring index parameters of the multiple magnetic rings of the filter assembly and the wireless charging operation parameters, the basic index parameters of the filter assembly are adjusted to obtain the preparation parameters of the filter assembly.

8. A device for determining parameters of a filter component for wireless charging of new energy vehicles, characterized in that: include: An acquisition module is used to obtain basic index parameters of a filter component for wireless charging of new energy vehicles in a wireless charging state; the filter component includes: a first copper bar main body, a second copper bar main body, and a first copper bar branch integrally formed with the first copper bar main body, and a second copper bar branch integrally formed with the second copper bar main body, the first copper bar main body and the second copper bar main body are provided with a plurality of first-type magnetic rings on the outer jacket, the first copper bar branch is provided with a plurality of second-type magnetic rings on the outer jacket, and the second copper bar branch is provided with a plurality of third-type magnetic rings on the outer jacket; the inner diameter of the first-type magnetic ring is greater than that of the second-type magnetic ring and the third-type magnetic ring; A processing module is used to obtain operating status data of the filter component in a wireless charging state according to the basic indicator parameters; obtain magnetic ring indicator parameters of multiple magnetic rings of the filter component according to the basic indicator parameters and the operating status data; and obtain preparation parameters of the filter component according to the magnetic ring indicator parameters of multiple magnetic rings of the filter component and wireless charging operating parameters.

9. A computing device, characterized in that include: A processor and a memory storing a computer program, wherein when the computer program is executed by the processor, the method according to any one of claims 1 to 7 is performed.

10. A filter component, characterized in that: The filter component is made according to the preparation parameters of the new energy vehicle filter component in the method described in any one of claims 1 to 7.

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