Vehicle-mounted charging wire harness electromagnetic radiation rectification method, device, equipment and storage medium

Abstract

The invention discloses a vehicle-mounted charging wire harness electromagnetic radiation rectification method, device and equipment and a storage medium, and the method comprises the steps: building a first wire harness simulation model of a target DC fast charging wire harness based on the core wire direction, core wire parameters and insulating layer parameters of the target DC fast charging wire harness; according to metal vehicle body environment parts around the target direct-current fast charging wire harness, an environment grid model distributed on the peripheral side of the wire harness simulation model is established; according to the first wire harness simulation model and the environment grid model, calculating and solving a first forward transmission parameter curve of the first wire harness simulation model in a preset frequency range; and according to the first forward transmission parameter curve, determining whether an electromagnetic magnetic ring and / or a shielding layer need to be configured on the target direct current fast charging wire harness. By means of the method, electromagnetic radiation rectification can be rapidly and accurately carried out on the vehicle-mounted charging wire harness, the electromagnetic radiation of the wire harness does not need to be verified through repeated tests, and the detection efficiency of the charging wire harness is greatly improved.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle-mounted wiring harness testing and analysis, and specifically to a method, device, equipment and storage medium for rectifying electromagnetic radiation of a vehicle-mounted charging wiring harness. Background Art

[0002] With the electrification of new energy vehicles, battery packs are standard for new energy vehicles. The capacity of battery packs is increasing, and the mileage is thus longer. Each battery pack has its own independent charging system, which is divided into two types: DC fast charging and conventional slow charging. The DC fast charging wiring harness is composed of two wires, the positive wiring harness and the negative wiring harness. When new energy vehicles are fast charged with high current, the current in the positive wiring harness and the negative wiring harness will generate electromagnetic radiation to the surrounding environment. Especially when the whole vehicle is charging, the electric field value radiated to the surrounding will exceed the standard limit.

[0003] The DC fast charging positive and negative wiring harnesses are connected to the charging pile on the ground at one end, and the on-board charger system OBC in the new energy vehicle at the other end. When the radiation exceeds the standard due to DC fast charging, the charging pile and the on-board charger cannot be changed, modified, or repaired. At this time, the DC fast charging wiring harness, as the transmission path of one of the three elements of electromagnetic compatibility, the positive wiring harness and the negative wiring harness are the rectification objects of the electromagnetic radiation bidding. The three conventional methods for automobile electromagnetic compatibility rectification are filtering, grounding, and shielding. Adding a shielding layer and grounding will lead to high rectification costs; filtering, such as adding a magnetic ring, is a low-cost and effective measure.

[0004] Adding magnetic rings to the wiring harness, for example, adding a magnetic ring to the positive wiring harness or adding a magnetic ring to the negative wiring harness, is a highly technical job involving multiple "trials", such as whether the magnetic ring is close to the battery pack side or the side of the ground charging pile; whether it is put on the positive cable or the negative cable; it is highly dependent on actual engineering practice experience, has a high time cost, and has a certain degree of randomness. Summary of the invention

[0005] The present application provides a method, device, equipment and storage medium for rectifying electromagnetic radiation of a vehicle charging harness, which can solve the technical problems existing in the above-mentioned prior art.

[0006] In the first aspect, the embodiment of the present application provides a method for rectifying electromagnetic radiation of a vehicle charging harness, which adopts the following technical solution:

[0007] A method for rectifying electromagnetic radiation of a vehicle charging harness, the method comprising:

[0008] Based on the core wire direction, core wire parameters and insulation layer parameters of the target DC fast charging wire harness, a first wire harness simulation model of the target DC fast charging wire harness is established;

[0009] According to the metal vehicle body environment parts around the target DC fast charging harness, an environmental grid model distributed around the harness simulation model is established;

[0010] Calculating and solving a first forward transmission parameter curve of the first wire harness simulation model within a preset frequency range according to the first wire harness simulation model and the environmental grid model;

[0011] According to the first forward transmission parameter curve, determine whether it is necessary to configure an electromagnetic magnetic ring and / or a shielding layer on the target DC fast charging harness.

[0012] In combination with the first aspect, in one embodiment, determining whether it is necessary to configure an electromagnetic magnetic ring and / or a shielding layer on the target DC fast charging harness according to the first forward transmission parameter curve includes the following steps:

[0013] If any transmission parameter on the first forward transmission parameter curve is less than the first threshold value and greater than the second threshold value, it is determined that an electromagnetic magnetic ring needs to be configured on the target DC fast charging harness;

[0014] If any transmission parameter on the first forward transmission parameter curve is less than the second threshold, it is determined that an electromagnetic magnetic ring and a shielding layer need to be configured on the target DC fast charging harness.

[0015] In combination with the first aspect, in one embodiment, if any transmission parameter on the first forward transmission parameter curve is less than the first threshold value and greater than the second threshold value, after determining that an electromagnetic magnetic ring needs to be configured on the target DC fast charging harness, the following steps are included:

[0016] The corresponding electromagnetic magnetic ring is determined according to the corresponding relationship between the frequency corresponding to the minimum transmission parameter on the first forward transmission parameter curve and the preset electromagnetic magnetic ring impedance and frequency.

[0017] In combination with the first aspect, in one embodiment, if any transmission parameter on the first forward transmission parameter curve is less than the second threshold, after determining that an electromagnetic magnetic ring and a shielding layer need to be configured on the target DC fast charging harness, the following steps are included:

[0018] Updating the first wiring harness simulation model based on preset shielding layer parameters to obtain a second wiring harness simulation model with a shielding layer;

[0019] According to the second wire harness simulation model and the environmental grid model, calculating and solving a second forward transmission parameter curve of the second wire harness simulation model within a preset frequency range;

[0020] The corresponding electromagnetic magnetic ring is determined according to the corresponding relationship between the frequency corresponding to the minimum transmission parameter on the second forward transmission parameter curve and the preset electromagnetic magnetic ring impedance and frequency.

[0021] In combination with the first aspect, in one implementation, calculating and solving a first forward transmission parameter curve of the first wire harness simulation model within a preset frequency range according to the first wire harness simulation model and the environmental grid model comprises the following steps:

[0022] Based on the first wiring harness simulation model, building a wiring harness topology model;

[0023] A first forward transmission parameter curve of the wiring harness topology model is solved according to the first wiring harness simulation model, the environmental grid model, the wiring harness topology model, and differential equations satisfied by voltage and current on a preset transmission line.

[0024] In combination with the first aspect, in one implementation, building a wiring harness topology model based on the first wiring harness simulation model includes the following steps:

[0025] Setting a terminal connector and a pin for the first wiring harness simulation model;

[0026] A termination circuit is set according to the terminal connector and the pin, and the impedance of the load end of the battery pack and the charging pile end on the ground of the first wiring harness simulation model is determined to form a wiring harness topology model.

[0027] In combination with the first aspect, in one implementation, the environmental grid model around the harness simulation model is established based on the metal vehicle body environmental parts around the target DC fast charging harness.

[0028] The electromagnetic grid is divided for the metal body environment parts around the target DC fast charging harness, and the divided cells are triangular units, and adjacent triangular units share nodes when connected.

[0029] In the second aspect, the embodiment of the present application provides an electromagnetic radiation rectification device for a vehicle charging harness, which adopts the following technical solution:

[0030] An electromagnetic radiation rectification device for a vehicle-mounted charging harness, the electromagnetic radiation rectification device for the vehicle-mounted charging harness comprising:

[0031] A modeling module is configured to establish a first harness simulation model of the target DC fast charging harness based on the core wire direction, core wire parameters and insulation layer parameters of the target DC fast charging harness; and establish an environmental grid model distributed around the harness simulation model according to the metal vehicle body environmental parts around the target DC fast charging harness;

[0032] A calculation module, configured to calculate and solve a first forward transmission parameter curve of the first wire harness simulation model within a preset frequency range according to the first wire harness simulation model and the environmental grid model;

[0033] An analysis module is configured to determine whether it is necessary to configure an electromagnetic magnetic ring and / or a shielding layer on the target DC fast charging harness based on the first forward transmission parameter curve.

[0034] In a third aspect, the embodiment of the present application provides an electromagnetic radiation rectification device for a vehicle charging harness, which adopts the following technical solution:

[0035] A device for rectifying electromagnetic radiation of a vehicle-mounted charging harness, comprising a processor, a memory, and an electromagnetic radiation rectification program for the vehicle-mounted charging harness stored in the memory and executable by the processor, wherein when the electromagnetic radiation rectification program for the vehicle-mounted charging harness is executed by the processor, the steps of the electromagnetic radiation rectification method for the vehicle-mounted charging harness as described above are implemented.

[0036] In a fourth aspect, an embodiment of the present application provides a storage medium, which adopts the following technical solution:

[0037] A storage medium stores an electromagnetic radiation rectification program for a vehicle charging harness, wherein when the electromagnetic radiation rectification program for the vehicle charging harness is executed by a processor, the steps of the electromagnetic radiation rectification method for the vehicle charging harness as described above are implemented.

[0038] The beneficial effects brought by the technical solution provided by the embodiments of the present application include:

[0039] After modeling the target DC fast charging harness and the metal body environment parts around it, the first forward transmission parameter curve of the first harness simulation model within the preset frequency range is simulated and calculated, and then the energy loss of the first harness simulation model within the preset frequency range is displayed by the first forward transmission parameter curve. The electromagnetic radiation of the target DC fast charging harness within the corresponding frequency range is grasped, and then it can be quickly determined whether it is necessary to configure an electromagnetic magnetic ring and / or a shielding layer on the target DC fast charging harness, so as to quickly and accurately rectify the electromagnetic radiation of the on-board charging harness, without the need for repeated tests to verify the electromagnetic radiation of the harness, thereby greatly improving the detection efficiency of the charging harness. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a flow chart of an embodiment of a method for rectifying electromagnetic radiation of a vehicle charging harness of the present application;

[0041] Figure 2 This is a schematic diagram of the structure used for theoretical derivation of the transmission line equation in the electromagnetic radiation rectification method of the vehicle charging harness in this application;

[0042] Figure 3It is a schematic diagram of the first forward transmission parameter curve obtained in the electromagnetic radiation rectification method of the vehicle charging harness of the present application;

[0043] Figure 4 This is a functional module diagram of an embodiment of an electromagnetic radiation rectification device for a vehicle-mounted charging harness of the present application;

[0044] Figure 5 This is a schematic diagram of the hardware structure of the electromagnetic radiation rectification equipment of the vehicle charging harness involved in the embodiment of the present application. DETAILED DESCRIPTION

[0045] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0046] The DC fast charging positive and negative wiring harnesses are connected to the charging pile on the ground at one end and the on-board charger system OBC in the new energy vehicle at the other end. When the DC fast charging causes the radiation to exceed the standard, the charging pile and the on-board charger cannot be changed, modified, or repaired. At this time, the DC fast charging wiring harness, as the transmission path of one of the three elements of electromagnetic compatibility, the positive wiring harness and the negative wiring harness are the rectification objects of the electromagnetic radiation bidding. The three conventional methods for automobile electromagnetic compatibility rectification are filtering, grounding, and shielding. Adding a shielding layer and grounding will lead to high rectification costs; while filtering, such as adding a magnetic ring, is a low-cost and effective measure. Adding a magnetic ring to the wiring harness, such as adding a magnetic ring to the positive wiring harness or adding a magnetic ring to the negative wiring harness, is a highly technical job with multiple "trial" processes, whether the magnetic ring is close to the battery pack side or close to the side of the ground charging pile; whether it is on the positive cable or the negative cable; it is highly dependent on actual engineering practice experience, and has a high time cost and a certain degree of randomness.

[0047] Based on the above problems, the present application provides a method, device, equipment and storage medium for rectifying the electromagnetic radiation of a vehicle-mounted charging harness. The key point of the invention is that after modeling the target DC fast charging harness and the metal body environment parts around it, the first forward transmission parameter curve of the first harness simulation model within a preset frequency range is simulated and calculated, and then the energy loss of the first harness simulation model within the preset frequency range displayed by the first forward transmission parameter curve is used to grasp the electromagnetic radiation of the target DC fast charging harness within the corresponding frequency range, and then whether it is necessary to configure an electromagnetic magnetic ring and / or a shielding layer on the target DC fast charging harness can be quickly grasped, so as to realize rapid and accurate electromagnetic radiation rectification of the vehicle-mounted charging harness, without the need for repeated experiments to verify the electromagnetic radiation of the harness, thereby greatly improving the detection efficiency of the charging harness.

[0048] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0049] In a first aspect, an embodiment of the present application provides a method for rectifying electromagnetic radiation of a vehicle charging harness.

[0050] In one embodiment, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the electromagnetic radiation rectification method for the vehicle charging harness of this application. Figure 1 As shown, the rectification methods for electromagnetic radiation of vehicle charging harness include:

[0051] S100, establishing a first harness simulation model of the target DC fast charging harness based on the core wire direction, core wire parameters, and insulation layer parameters of the target DC fast charging harness;

[0052] Exemplarily, first, the coordinates of the target DC fast charging harness core wire direction are imported. Specifically, the harness core wire is generally a curve, that is, the harness core wire is first generated according to the size of 5mm to generate line units, which will generate hundreds of line grid nodes, and then extract the coordinates of these nodes, and output the **.txt file. Then import the coordinate file into the electromagnetic simulation environment. In an embodiment of the present invention, the length of the AC harness of the high-voltage DC fast charging system is 1.5m, and it is divided into 5mm as a scale, then 300 nodes are generated, and then a coordinate document in the form of a notepad is created and imported into the electromagnetic simulation software. Secondly, setting the target DC fast charging harness core wire involves core wire parameters and insulation layer parameters, including the material type of the core wire and the insulation layer, material conductivity, core wire radius, insulation layer thickness, relative dielectric constant of the insulation layer, loss tangent, etc., wherein the insulation layer, in some embodiments, includes an outer insulation layer and an inner insulation layer, and the material type and related parameters of both need to be provided. Finally, the first harness simulation model is constructed in the simulation software.

[0053] S200, establishing an environmental grid model distributed around the harness simulation model according to the metal vehicle body environmental parts around the target DC fast charging harness;

[0054] Specifically, before analyzing the electromagnetic crosstalk of the wiring harness, it is necessary to divide the wiring harness and the surrounding metal environment parts into electromagnetic grids. The grid division specifications are shown in Table 1.

[0055] Table 1 Meshing quality requirements and algorithm selection

[0056]

[0057] At this time, only the geometric shape of the metal parts is retained in the car body model, and the thickness is not retained, in order to improve the simulation efficiency; the triangular units must share common nodes when connected to ensure the continuity of the mesh; if it is a wide-band problem, the mesh should be divided into frequency bands, and the mesh should be divided according to one-eighth of the wavelength of the highest frequency point; the frequency is low and the wavelength is very long. At this time, the mesh should be able to fit the model first, for example, the mesh can be divided into one-fiftieth of the wavelength; when checking the mesh, there should be no overlapping triangular units, isolated triangular units, etc.

[0058] Because the basic principle of solving the electromagnetic crosstalk calculation of the fast charging harness is based on the transmission line theory, it is required that the metal environment parts near the harness cable must be less than 1 / 5 wavelength of the highest frequency calculated. There must be metal environment parts near the entire harness in the space, and they must meet this requirement.

[0059] S300, calculating and solving a first forward transmission parameter curve of the first wire harness simulation model within a preset frequency range according to the first wire harness simulation model and the environmental grid model;

[0060] Further, in some embodiments, step S300 includes the following steps:

[0061] S310, building a wiring harness topology model based on the first wiring harness simulation model;

[0062] Specifically, step S310 sets the terminal connector and pin pins for the DC harness that constitutes the high-voltage fast-charging harness. For a DC harness with a shielding layer, the two harnesses have four endpoints, and each endpoint is composed of a shielding layer of bare copper tin-plated texture and two pin pins of copper core wire. The shielding layer pin pin plays the role of a shielding layer, and the copper core pin pin plays a conductive role. For a DC harness without a shielding layer, it only has a copper core pin pin. After setting the terminal connector and pin pin, it is necessary to set the termination circuit, and determine the impedance of the load end of the battery pack and the charging pile end of the ground that terminate the first harness simulation model to form a harness topology model.

[0063] S320, solving a first forward transmission parameter curve of the wiring harness topology model according to the first wiring harness simulation model, the environmental grid model, the wiring harness topology model, and differential equations satisfied by voltage and current on the preset transmission line.

[0064] Specifically, in the process of solving the first forward transmission parameter curve of the wiring harness topology model, the solution type needs to be set. Since the crosstalk coupling solution calculation between the positive wiring harness and the negative wiring harness is based on the transmission line theory method MTL. The general transmission line is as follows Figure 2 As shown in (a), the two cables or the traces on the PCB are parallel; (b) is to divide the transmission line into multiple segments of length △Z along the length direction; (c) is the resistance and parasitic inductance related to the length △Z on each segment, and there are parasitic capacitance and parasitic admittance related to the segment length △Z between each segment. Among them, the equivalent circuit parameters R', G', L', C' of the transmission line are also uniformly distributed along the transmission line, so they are called distributed circuit parameters. In the lumped parameter circuit, the magnetic field is lumped in the inductor, the electric field is lumped in the capacitor, and the energy is lumped in the resistance and conductance.

[0065] Transmission line equation:

[0066]

[0067]

[0068] When △Z approaches 0, taking the limit, we get

[0069]

[0070]

[0071] This is the differential equation satisfied by the voltage and current on the transmission line, which is called the transmission line equation. In order to analyze the electromagnetic field crosstalk of the high-voltage DC fast charging harness, the embodiment of the present invention solves the transmission harness equation between the harnesses, so the harness topology solution type is set to crosstalk.

[0072] The DC fast charging harness, sheet metal around the vehicle body, and circuit topology of the harness created above are submitted for calculation and solution. After the calculation is completed, the forward transmission parameter curve of the four ports is extracted, and finally the first forward transmission parameter curve is obtained. Its horizontal axis is the frequency, and the vertical axis is the forward transmission loss at each frequency, which is a negative value. Figure 3 .

[0073] S400. Determine whether it is necessary to configure an electromagnetic magnetic ring and / or a shielding layer on the target DC fast charging harness according to the first forward transmission parameter curve.

[0074] Further, in some embodiments, S400 includes the following steps:

[0075] S410: If any transmission parameter on the first forward transmission parameter curve is less than the first threshold value and greater than the second threshold value, it is determined that an electromagnetic magnetic ring needs to be configured on the target DC fast charging harness;

[0076] Specifically, for an ideal situation, if the wiring harness does not generate electromagnetic radiation to the outside, the first forward transmission parameter curve obtained should be a horizontal line with a vertical coordinate corresponding to a loss of 0 regardless of any value of the horizontal axis. Therefore, by checking whether there is any transmission parameter on the first forward transmission parameter curve that is less than the first threshold and greater than the second threshold, it can be determined that an electromagnetic magnetic ring needs to be configured on the target DC fast charging harness. Among them, the first threshold and the second threshold are formulated by relevant personnel according to radiation requirements. When it is less than the first threshold, it means that there is a need for electromagnetic radiation rectification, but it is still greater than the second threshold, which means that the amount of electromagnetic radiation exceeding the standard is relatively low at this time. Considering the cost, it is determined to configure an electromagnetic magnetic ring on the target DC fast charging harness to suppress electromagnetic radiation.

[0077] Regarding the method for selecting the electromagnetic magnetic ring, in some embodiments, after step S410, the following steps are included:

[0078] S411. Determine a corresponding electromagnetic magnetic ring according to a correspondence between a frequency corresponding to a minimum transmission parameter on the first forward transmission parameter curve and a preset electromagnetic magnetic ring impedance and frequency.

[0079] S420: If any transmission parameter on the first forward transmission parameter curve is smaller than the second threshold, it is determined that an electromagnetic magnetic ring and a shielding layer need to be configured on the target DC fast charging harness.

[0080] When any value less than the first threshold appears on the first forward transmission parameter curve, it indicates that electromagnetic radiation rectification is required, and the amount of electromagnetic radiation exceeding the standard is relatively high at this time. The electromagnetic magnetic ring alone will not be sufficient to suppress the electromagnetic radiation. Therefore, it is determined to configure a shielding layer and an electromagnetic magnetic ring on the target DC fast charging harness to suppress electromagnetic radiation.

[0081] Thereafter, in order to determine a suitable electromagnetic magnetic ring after step S420, the following steps are included:

[0082] S421, updating the first wiring harness simulation model based on preset shielding layer parameters to obtain a second wiring harness simulation model with a shielding layer;

[0083] Among them, since the cost of the shielding layer is higher than that of the electromagnetic magnetic ring, the selection of the shielding layer is set according to the cost needs of the technicians. Ultimately, while the selected shielding layer has a lower cost, an electromagnetic magnetic ring that can suppress electromagnetic radiation to a level that meets the requirements can be selected later to achieve cost control.

[0084] S422, calculating and solving a second forward transmission parameter curve of the second wire harness simulation model within a preset frequency range according to the second wire harness simulation model and the environmental grid model;

[0085] S423: Determine a corresponding electromagnetic magnetic ring according to a corresponding relationship between a frequency corresponding to a minimum transmission parameter on the second forward transmission parameter curve and a preset electromagnetic magnetic ring impedance and frequency.

[0086] The above steps S422 and S423 are consistent with the above analysis steps and will not be repeated here. Finally, the corresponding electromagnetic magnetic ring is determined by using the corresponding relationship between the frequency corresponding to the minimum transmission parameter on the second forward transmission parameter curve and the preset electromagnetic magnetic ring impedance and frequency.

[0087] In a second aspect, an embodiment of the present application also provides an electromagnetic radiation rectification device for a vehicle-mounted charging harness.

[0088] In one embodiment, referring to Figure 4 , Figure 4 This is a functional module diagram of an embodiment of the electromagnetic radiation rectification device of the vehicle charging harness of the present application. Figure 4 As shown, the electromagnetic radiation rectification device of the vehicle charging harness includes:

[0089] A modeling module is configured to establish a first harness simulation model of the target DC fast charging harness based on the core wire direction, core wire parameters and insulation layer parameters of the target DC fast charging harness; and establish an environmental grid model distributed around the harness simulation model according to the metal vehicle body environmental parts around the target DC fast charging harness;

[0090] A calculation module, configured to calculate and solve a first forward transmission parameter curve of the first wire harness simulation model within a preset frequency range according to the first wire harness simulation model and the environmental grid model;

[0091] An analysis module is configured to determine whether it is necessary to configure an electromagnetic magnetic ring and / or a shielding layer on the target DC fast charging harness based on the first forward transmission parameter curve.

[0092] Among them, the functional implementation of each module in the above-mentioned electromagnetic radiation rectification device of the vehicle charging harness corresponds to the various steps in the above-mentioned vehicle charging harness electromagnetic radiation rectification method embodiment, and its functions and implementation processes will not be repeated here one by one.

[0093] In a third aspect, an embodiment of the present application provides an electromagnetic radiation rectification device for a vehicle-mounted charging harness. The electromagnetic radiation rectification device for a vehicle-mounted charging harness may be a personal computer (PC), a laptop computer, a server, or other device with data processing capabilities.

[0094] Reference Figure 5 , Figure 5 The schematic diagram of the hardware structure of the electromagnetic radiation rectification device of the vehicle charging harness involved in the embodiment of the present application is shown in FIG. In the embodiment of the present application, the electromagnetic radiation rectification device of the vehicle charging harness may include a processor, a memory, a communication interface, and a communication bus.

[0095] The communication bus may be of any type and is used to interconnect the processor, the memory, and the communication interface.

[0096] The communication interface includes input / output (I / O) interface, physical interface and logical interface, etc., which are used to realize the interconnection of devices inside the electromagnetic radiation rectification device of the vehicle charging harness, and the interface used to realize the interconnection of the electromagnetic radiation rectification device of the vehicle charging harness with other devices (such as other computing devices or user devices). The physical interface can be an Ethernet interface, a fiber optic interface, an ATM interface, etc.; the user device can be a display, a keyboard, etc.

[0097] The memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0098] The processor may be a general-purpose processor, which may call the electromagnetic radiation rectification program of the vehicle charging harness stored in the memory and execute the electromagnetic radiation rectification method of the vehicle charging harness provided in the embodiment of the present application. For example, the general-purpose processor may be a central processing unit (CPU). The method executed when the electromagnetic radiation rectification program of the vehicle charging harness is called may refer to the various embodiments of the electromagnetic radiation rectification method of the vehicle charging harness of the present application, which will not be repeated here.

[0099] Those skilled in the art will understand that Figure 5 The hardware structure shown in the figure does not constitute a limitation on the present application, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0100] In a fourth aspect, an embodiment of the present application also provides a storage medium.

[0101] The storage medium of the present application stores an electromagnetic radiation rectification program for a vehicle charging harness, wherein when the electromagnetic radiation rectification program for the vehicle charging harness is executed by a processor, the steps of the above-mentioned method for rectifying the electromagnetic radiation of a vehicle charging harness are implemented.

[0102] Among them, the method implemented when the electromagnetic radiation rectification program of the vehicle charging harness is executed can refer to the various embodiments of the electromagnetic radiation rectification method of the vehicle charging harness of the present application, and will not be repeated here.

[0103] It should be noted that the serial numbers of the above-mentioned embodiments of the present application are only for description and do not represent the advantages or disadvantages of the embodiments.

[0104] The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices. The terms "first", "second" and "third" are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit "first", "second" and "third" to different types.

[0105] In the description of the embodiments of the present application, "exemplary", "for example" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary", "for example" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary", "for example" or "for example" is intended to present related concepts in a specific way.

[0106] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; the “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” refers to two or more than two.

[0107] In some processes described in the embodiments of the present application, multiple operations or steps that appear in a specific order are included, but it should be understood that these operations or steps may not be executed in the order in which they appear in the embodiments of the present application or in parallel, and the sequence number of the operation is only used to distinguish the different operations, and the sequence number itself does not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed in sequence or in parallel, and these operations or steps may be combined.

[0108] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, disk, CD) as described above, and includes a number of instructions for a terminal device to execute the methods described in each embodiment of the present application.

[0109] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A method for rectifying electromagnetic radiation of a vehicle charging harness, characterized in that: The method comprises: Based on the core wire direction, core wire parameters and insulation layer parameters of the target DC fast charging wire harness, a first wire harness simulation model of the target DC fast charging wire harness is established; According to the metal vehicle body environment parts around the target DC fast charging harness, an environmental grid model distributed around the harness simulation model is established; Calculating and solving a first forward transmission parameter curve of the first wire harness simulation model within a preset frequency range according to the first wire harness simulation model and the environmental grid model; According to the first forward transmission parameter curve, determine whether it is necessary to configure an electromagnetic magnetic ring and / or a shielding layer on the target DC fast charging harness.

2. The method for rectifying electromagnetic radiation of a vehicle charging harness according to claim 1, characterized in that: The step of determining whether it is necessary to configure an electromagnetic magnetic ring and / or a shielding layer on the target DC fast charging harness according to the first forward transmission parameter curve comprises the following steps: If any transmission parameter on the first forward transmission parameter curve is less than the first threshold value and greater than the second threshold value, it is determined that an electromagnetic magnetic ring needs to be configured on the target DC fast charging harness; If any transmission parameter on the first forward transmission parameter curve is less than the second threshold, it is determined that an electromagnetic magnetic ring and a shielding layer need to be configured on the target DC fast charging harness.

3. The method for rectifying electromagnetic radiation of a vehicle charging harness as claimed in claim 2, characterized in that: If any transmission parameter on the first forward transmission parameter curve is less than the first threshold value and greater than the second threshold value, it is determined that an electromagnetic magnetic ring needs to be configured on the target DC fast charging harness, and the following steps are included: The corresponding electromagnetic magnetic ring is determined according to the corresponding relationship between the frequency corresponding to the minimum transmission parameter on the first forward transmission parameter curve and the preset electromagnetic magnetic ring impedance and frequency.

4. The method for rectifying electromagnetic radiation of a vehicle charging harness as claimed in claim 2, characterized in that: If any transmission parameter on the first forward transmission parameter curve is less than the second threshold, it is determined that an electromagnetic magnetic ring and a shielding layer need to be configured on the target DC fast charging harness, and the following steps are included: Updating the first wiring harness simulation model based on preset shielding layer parameters to obtain a second wiring harness simulation model with a shielding layer; According to the second wire harness simulation model and the environmental grid model, calculating and solving a second forward transmission parameter curve of the second wire harness simulation model within a preset frequency range; The corresponding electromagnetic magnetic ring is determined according to the corresponding relationship between the frequency corresponding to the minimum transmission parameter on the second forward transmission parameter curve and the preset electromagnetic magnetic ring impedance and frequency.

5. The method for rectifying electromagnetic radiation of a vehicle charging harness according to claim 1, characterized in that: The step of calculating and solving a first forward transmission parameter curve of the first wire harness simulation model within a preset frequency range according to the first wire harness simulation model and the environmental grid model comprises the following steps: Based on the first wiring harness simulation model, building a wiring harness topology model; A first forward transmission parameter curve of the wiring harness topology model is solved according to the first wiring harness simulation model, the environmental grid model, the wiring harness topology model, and differential equations satisfied by voltage and current on a preset transmission line.

6. The method for rectifying electromagnetic radiation of a vehicle charging harness as claimed in claim 5, characterized in that: The step of building a wiring harness topology model based on the first wiring harness simulation model comprises the following steps: Setting a terminal connector and a pin for the first wiring harness simulation model; A termination circuit is set according to the terminal connector and the pin, and the impedance of the load end of the battery pack and the charging pile end on the ground of the first wiring harness simulation model is determined to form a wiring harness topology model.

7. The method for rectifying electromagnetic radiation of a vehicle charging harness according to claim 1, characterized in that: According to the metal vehicle body environment parts around the target DC fast charging harness, an environmental grid model around the harness simulation model is established. The electromagnetic grid is divided for the metal body environment parts around the target DC fast charging harness, and the divided cells are triangular units, and adjacent triangular units share nodes when connected.

8. An electromagnetic radiation rectification device for a vehicle-mounted charging harness, characterized in that: The electromagnetic radiation rectification device of the vehicle-mounted charging harness comprises: A modeling module is configured to establish a first harness simulation model of the target DC fast charging harness based on the core wire direction, core wire parameters and insulation layer parameters of the target DC fast charging harness; and establish an environmental grid model distributed around the harness simulation model according to the metal vehicle body environmental parts around the target DC fast charging harness; A calculation module, configured to calculate and solve a first forward transmission parameter curve of the first wire harness simulation model within a preset frequency range according to the first wire harness simulation model and the environmental grid model; An analysis module is configured to determine whether it is necessary to configure an electromagnetic magnetic ring and / or a shielding layer on the target DC fast charging harness based on the first forward transmission parameter curve.

9. An electromagnetic radiation rectification device for a vehicle charging harness, characterized in that: The electromagnetic radiation rectification device of the vehicle charging harness includes a processor, a memory, and an electromagnetic radiation rectification program of the vehicle charging harness stored in the memory and executable by the processor. When the electromagnetic radiation rectification program of the vehicle charging harness is executed by the processor, the steps of the electromagnetic radiation rectification method of the vehicle charging harness as described in any one of claims 1 to 7 are implemented.

10. A storage medium, characterized in that: The storage medium stores an electromagnetic radiation rectification program for a vehicle charging harness, wherein when the electromagnetic radiation rectification program for the vehicle charging harness is executed by a processor, the steps of the electromagnetic radiation rectification method for a vehicle charging harness as described in any one of claims 1 to 7 are implemented.

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