Method, device and medium for selecting electrical parameter value of vehicle

Abstract

The invention discloses a method and device for selecting an electrical parameter value of a vehicle and a medium. The method comprises the steps that a circuit simulation model is obtained, the circuit simulation model comprises a plurality of circuit units, each circuit unit corresponds to an electric appliance part of a vehicle, and each circuit unit is composed of at least one logic element; and adjusting the value of the electrical parameter of at least one logic element in the circuit simulation model, determining the resonant frequency of the driving unit based on the circuit simulation model after the electrical parameter adjustment after each adjustment, and recording the mapping relation between the current electrical parameter value set and the resonant frequency of the driving unit. According to the invention, the recorded mapping relation can be used as a reference basis to quickly adjust the electrical parameter value of each electrical component of the vehicle, so that the resonant frequency of the circuit can be reduced, and the noise generated in the operation process of the motor can be reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of vehicles, and particularly to a method, an apparatus, and a medium for selecting electrical parameter values of a vehicle. Background Art

[0002] With the development of technology, the market share of new energy vehicles is increasing day by day, and the noise reduction design of new energy vehicles has gradually attracted the attention of the industry.

[0003] In new energy vehicles, the greater the resonance frequency of the circuit where the electric drive component is located, the greater the ripple current of the circuit, which in turn causes the greater the noise generated by the motor during operation.

[0004] How to set the working parameters of each electrical component in the circuit to reduce the resonance frequency of the circuit has become a technical problem to be solved urgently. Summary of the Invention

[0005] Embodiments of the present disclosure provide a method, an apparatus, and a medium for selecting electrical parameter values of a vehicle, which can solve the above-mentioned technical problems existing in the related art. The technical solutions are as follows:

[0006] In a first aspect, a method for selecting electrical parameter values of a vehicle is provided. The method includes:

[0007] Obtain a circuit simulation model, where the circuit simulation model includes a plurality of circuit units, each circuit unit corresponds to an electrical component of the vehicle, the electrical components of the vehicle include a drive component and a wiring harness component, the connection between the plurality of circuit units corresponds to the connection between the plurality of electrical components of the vehicle, each circuit unit is composed of at least one logic element, each logic element corresponds to an electrical parameter, the electrical parameter is one of resistance, inductance, and capacitance, and the value of the electrical parameter of each logic element is a specified value;

[0008] Adjust the value of the electrical parameter of at least one logic element in the circuit simulation model. After each adjustment, based on the circuit simulation model with the adjusted electrical parameter, determine the resonance frequency of the drive unit, and record the mapping relationship between the current set of electrical parameter values and the resonance frequency of the drive unit, where the current set of electrical parameter values includes the current values of the electrical parameters of all logic elements, the drive unit is the circuit unit in the circuit simulation model corresponding to the drive component, and the mapping relationship is used as a basis for selecting the values of the electrical parameters of each electrical component of the vehicle.

[0009] In some possible implementation manners, the method further includes:

[0010] Among all the recorded mapping relationships, determine the target resonant frequencies that meet the target conditions, and obtain the set of target electrical parameters corresponding to each target resonant frequency. Among them, the set of target electrical parameters is used for selection, and the values of the electrical parameters in the selected set of target electrical parameters are used as the design reference values for the electrical parameters of each electrical component of the vehicle.

[0011] In some possible implementation manners, the target condition is that the resonant frequency of the drive unit is less than the specified frequency.

[0012] In some possible implementation manners, adjusting the value of the electrical parameter of at least one logic element in the circuit simulation model includes:

[0013] Adjust the value of the electrical parameter of one logic element in the circuit simulation model.

[0014] In some possible implementation manners, the specified value corresponding to each logic element is the value of the electrical parameter of the electrical component of the vehicle corresponding to each logic element obtained in advance.

[0015] In some possible implementation manners, before adjusting the value of the electrical parameter of at least one logic element in the circuit simulation model, the method further includes:

[0016] Adjust the value of the electrical parameter of at least one logic element in the circuit simulation model. After each adjustment, determine the resonant frequency of the drive unit in the circuit simulation model with the adjusted electrical parameter at multiple input source frequencies until the multiple determined resonant frequencies and the multiple reference resonant frequencies meet the matching condition, where the reference resonant frequency is the resonant frequency of the drive component of the vehicle at the corresponding input source frequency obtained in advance.

[0017] In some possible implementation manners, the matching condition is that the relative error between the resonant frequency of the drive unit and the reference frequency of the drive component is within 5%.

[0018] In a second aspect, a device for selecting the value of the electrical parameter of a vehicle is provided. The device includes an acquisition module and a recording module;

[0019] The acquisition module is used to acquire a circuit simulation model, where the circuit simulation model includes multiple circuit units, each circuit unit corresponds to an electrical component of the vehicle, the electrical components of the vehicle include a drive component and a battery, the connection between the multiple circuit units corresponds to the connection between the multiple electrical components of the vehicle, each circuit unit is composed of at least one logic element, each logic element corresponds to an electrical parameter, the electrical parameter is one of resistance, inductance, and capacitance, and the value of the electrical parameter of each logic element is a specified value;

[0020] The recording module is used to adjust the values of the electrical parameters of at least one logic element in the circuit simulation model. After each adjustment, the recording module determines the resonance frequency of the driving unit based on the circuit simulation model with the adjusted electrical parameters, and records the mapping relationship between the current set of electrical parameter values and the resonance frequency of the driving unit. Wherein, the current set of electrical parameter values includes the current values of the electrical parameters of all logic elements, the driving unit is the circuit unit in the circuit simulation model corresponding to the driving component, and the mapping relationship is used as the basis for selecting the values of the electrical parameters of each electrical component of the vehicle.

[0021] In a third aspect, a computer-readable storage medium is provided. The computer-readable storage medium includes computer program instructions. When the computer program instructions are executed by a computing device, the computing device executes the method provided in the first aspect and its possible implementations.

[0022] In a fourth aspect, a computer program product containing instructions is provided. When the instructions are run by a computing device, the computing device is caused to execute the method provided in the first aspect and its possible implementations.

[0023] The beneficial effects brought by the technical solution provided by the present disclosure at least include:

[0024] Through the obtained circuit simulation model, the mapping relationship between the set of electrical parameter values and the resonance frequency of the driving unit can be obtained, so that the values of the electrical parameters of each electrical component of the vehicle can be reasonably selected according to this mapping relationship to reduce the resonance frequency of the driving component, and further the noise generated by the driving component during operation can be reduced.

[0025] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 is a schematic diagram of a circuit simulation model provided by an embodiment of the present disclosure;

[0028] Figure 2 is a schematic diagram of a circuit simulation model provided by an embodiment of the present disclosure;

[0029] Figure 3It is a schematic diagram of a circuit simulation model provided by an embodiment of the present disclosure;

[0030] Figure 4 It is a schematic diagram of a circuit simulation model provided by an embodiment of the present disclosure;

[0031] Figure 5 It is an effect diagram before and after selecting the electrical parameter values of a vehicle based on a circuit simulation model provided by an embodiment of the present disclosure.

[0032] Reference numerals:

[0033] 1. First drive unit; 2. Second drive unit; 3. First wire harness unit; 4. Second wire harness unit; 5. Battery unit; 6. On-vehicle charging unit; 7. Air conditioning unit; 8. Busbar unit; 9. Voltage detection unit; 10. Current detection unit; 11. Acquisition unit; 12. Input unit; 13. Oscilloscope unit. Detailed implementation manners

[0034] To make the objectives, technical solutions, and advantages of the present disclosure clearer, the following will further describe the embodiments of the present disclosure in detail with reference to the accompanying drawings.

[0035] It should be noted that, without conflict, the embodiments in the present disclosure and the features in the embodiments may be combined with each other. The following will describe the present disclosure in detail with reference to the accompanying drawings and embodiments.

[0036] An embodiment of the present disclosure provides a method for selecting electrical parameter values of a vehicle, and the method includes:

[0037] Obtain a circuit simulation model, where the circuit simulation model includes a plurality of circuit units, each circuit unit corresponds to an electrical component of the vehicle, the electrical components of the vehicle include drive components and wire harness components, the connections between the plurality of circuit units correspond to the connections between the plurality of electrical components of the vehicle, each circuit unit is composed of at least one logic element, each logic element corresponds to an electrical parameter, the electrical parameter is one of resistance, inductance, and capacitance, and the value of the electrical parameter of each logic element is a specified value;

[0038] Adjust the value of the electrical parameter of at least one logic element in the circuit simulation model. After each adjustment, based on the circuit simulation model with the adjusted electrical parameter, determine the resonant frequency of the drive unit, and record the mapping relationship between the current set of electrical parameter values and the resonant frequency of the drive unit, where the current set of electrical parameter values includes the current values of the electrical parameters of all logic elements, the drive unit is the circuit unit corresponding to the drive component in the circuit simulation model, and the mapping relationship is used as a basis for selecting the values of the electrical parameters of each electrical component of the vehicle.

[0039] Based on the obtained circuit simulation model, the mapping relationship between the set of electrical parameter values and the resonance frequency of the driving unit can be obtained. Thus, according to this mapping relationship, the electrical parameter values of each electrical component of the vehicle can be reasonably selected to reduce the resonance frequency of the driving component, and further the noise generated by the driving component during operation can be reduced.

[0040] Among them, after recording the mapping relationships between multiple sets of electrical parameter values and the resonance frequency of the driving unit, all the recorded mapping relationships can be used to establish a relationship table between the values of each electrical parameter and the resonance frequency of the circuit where the driving unit is located, or generate a corresponding fitting graph, so that the relevant personnel can obtain the corresponding information more clearly and intuitively, facilitating the staff to select the electrical parameter values of each electrical component of the vehicle.

[0041] Among them, the circuit simulation model is established in this way: on the basis of studying the vehicle high-voltage circuit system, according to theories such as the circuit superposition theorem, substitution theorem, Thévenin theorem and Norton theorem, equivalent transformation is performed on the vehicle's RLC circuit to achieve the equivalence and simplification of the simulation model calculation.

[0042] In an example, the electrical components of the vehicle include a first driving component, a second driving component, a first wiring harness component and a second wiring harness component. The electrical components of the vehicle also include other electrical components such as a battery, a CDU (Conversion & Distribution Unit, on-vehicle charger) assembly, an air-conditioning assembly and a busbar. The first driving component and the first wiring harness component are connected in series to form the first branch of the vehicle. The CDU assembly forms the second branch, the air-conditioning assembly forms the third branch, and the second driving component, the second wiring harness component and the busbar form the fourth branch. In the vehicle, the first branch, the second branch, the third branch and the fourth branch are connected in parallel.

[0043] Correspondingly, in Figure 1 the shown simulation model, there are also corresponding first driving unit, second driving unit, first wiring harness unit, second wiring harness unit, battery unit, on-vehicle charging unit, air-conditioning unit and busbar unit. Among them, in Figure 1 the shown simulation model, the first driving unit, the second driving unit, the on-vehicle charging unit and the air-conditioning unit can be respectively abstracted as an RCL component formed by connecting a resistor, a capacitor and an inductor in series. The battery unit, the first wiring harness unit, the second wiring harness unit and the busbar unit can be respectively abstracted as an RL component composed of a resistor and an inductor. The first driving unit and the first wiring harness unit are connected in series to form the first branch of the simulation model. The on-vehicle charging unit forms the second branch of the simulation model. The air-conditioning unit forms the third branch of the simulation model. The second driving unit, the second wiring harness unit and the busbar unit form the fourth branch of the simulation model. In the simulation model, the first branch, the second branch, the third branch and the fourth branch are connected in parallel.

[0044] Thus, the circuit simulation model in the embodiments of the present disclosure not only covers the battery, CDU, air conditioner and busbar, but also introduces the parasitic inductance characteristics of the wire harness itself to further improve the accuracy of the simulation model. This circuit simulation model can be used to simulate the high-voltage circuit in the vehicle to obtain the correspondence between the electrical parameters of each electrical component in each high-voltage circuit and the resonance frequency of the first driving component and the second driving component, so as to be able to adjust each electrical component to reduce the resonance frequency of the circuit where the driving component is located, and reduce the noise generated by each driving component (i.e., the motor) during operation.

[0045] As Figure 1 shown, in order to comprehensively monitor and analyze the resonance frequency of the circuit RLC, the embodiments of the present disclosure integrate multiple current detection units, multiple voltage detection units, an acquisition unit, an input unit and an oscilloscope unit in the simulation model. Among them, the current detection unit is used to detect the current flowing through the circuit, the voltage detection unit is used to detect the voltage of the circuit unit, the acquisition unit is used to obtain the relationship between the circuit current and impedance at different frequencies to obtain the resonance frequency of the relevant circuit, the input unit is used to adjust the input source frequency, and the oscilloscope unit is used to indicate the waveforms of the voltage and current of part of the circuit to monitor the dynamic voltage peak value of the circuit.

[0046] As Figure 1 shown, one of the current detection units is located in the first branch and is connected in series with the first driving unit and the first wire harness unit, one of the voltage detection units is located in the first branch and is connected in parallel with the first driving unit, and one of the acquisition units is located between the first branch and the second branch; another current detection unit is located in the fourth branch and is connected in series with the second driving unit and the first wire harness unit, and one of the voltage detection units is located in the fourth branch and is connected in parallel with the second driving unit; in addition, there are two current detection circuits located in the second branch and the third branch. In addition, the circuit simulation model further includes a fifth branch and a sixth branch. The fifth branch includes an input unit, a current detection unit and an acquisition unit, and the sixth branch includes an oscilloscope unit, and the oscilloscope unit is electrically connected to the output end of the current detection unit located in the first branch.

[0047] Among them, the component process of the acquisition unit is as follows: based on the parameters of the RLC components in the circuit simulation model, a mathematical model is established, which usually involves constructing first-order and second-order linear and non-linear differential equations. Using the mathematical model, according to the Laplace transform, a program is written to calculate the transfer function of the circuit system, and this transfer function is the relevant program in the acquisition unit.

[0048] In some embodiments, the method further includes: among all the recorded mapping relationships, determining a target resonance frequency that meets a target condition, and obtaining a set of target electrical parameters corresponding to each target resonance frequency, where the set of target electrical parameters is for selection, and the values of the electrical parameters in the selected set of target electrical parameters are used as the design reference values for the electrical parameters of each electrical component of the vehicle.

[0049] In this way, in the circuit simulation model, taking the set of target electrical parameter values as the current values of the electrical parameters of all logical components, the resonance frequency of the circuit where the driving unit is located can meet the target condition. Taking the set of target electrical parameters as the design reference values for the electrical parameters of each electrical component of the vehicle can enable the resonance frequency of the driving component in the vehicle to be near the target resonance frequency. Thus, in this way, all mapping relationships can be quickly screened to help designers quickly determine the design values of the electrical parameters of each electrical component of the vehicle to adjust the resonance frequency of the driving component.

[0050] In some embodiments, the target condition is that the resonance frequency of the driving unit is less than a specified frequency.

[0051] In this way, among all the recorded mapping relationships, all sets of electrical parameters with resonance frequencies lower than the specified frequency can be quickly screened out, and the corresponding set of target parameters can be obtained. Taking the set of target electrical parameter values as the current values of the electrical parameters of all logical components, the resonance frequency of the driving unit is lower than the specified frequency. Taking the set of target electrical parameters as the design reference values for the electrical parameters of each electrical component of the vehicle can enable the driving component in the vehicle to be lower than the specified frequency or near the specified frequency, thereby reducing the resonance frequency of the circuit where the driving component is located to reduce the noise generated by the motor during operation.

[0052] In some embodiments, adjusting the value of the electrical parameter of at least one logical component in the circuit simulation model includes: adjusting the value of the electrical parameter of one logical component in the circuit simulation model.

[0053] In this way, during the process of adjusting the value of the electrical parameter in the circuit simulation model, since only the value of the electrical parameter of one logical component is adjusted each time, the corresponding relationship between the value of the electrical parameter of a single logical component and the resonance frequency of the driving unit can be obtained while the values of the electrical parameters of other logical components remain unchanged, so as to quickly determine the sensitivity relationship between the resonance frequency and the values of each electrical parameter, thereby avoiding the difficulty of determining the influence degree of the values of the electrical parameters of each logical unit on the resonance frequency caused by changing the values of multiple logical components simultaneously.

[0054] In some embodiments, the specified value corresponding to each logical component is the value of the electrical parameter of the electrical component of the vehicle corresponding to each logical component obtained in advance.

[0055] Before obtaining the simulation model, the electrical parameter values of the electrical components of the vehicle corresponding to each logic unit are measured to obtain the specified value and record it. When obtaining the simulation model, the electrical parameters of each logic element are configured as the specified value, so that the simulation model can accurately simulate the high-voltage circuit in the vehicle and improve the accuracy of the simulation model reference.

[0056] Among them, for the pre-obtained electrical parameter values of the electrical components of the vehicle corresponding to each logic element, such as the electrical parameter values of electrical components such as drive components and air conditioners, can be determined by calibrated parameters, while the electrical parameter values of electrical components such as wiring harness components can be obtained by calculating the circuit system, which is a pre-estimated value.

[0057] In some embodiments, before adjusting the electrical parameter values of at least one logic element in the circuit simulation model, the method further includes: adjusting the electrical parameter values of at least one logic element in the circuit simulation model. After each adjustment, determine the resonance frequency of the drive unit in the circuit simulation model with adjusted electrical parameters at multiple input source frequencies until the determined multiple resonance frequencies meet the matching condition with multiple reference resonance frequencies. Among them, the reference resonance frequency is the resonance frequency of the drive component of the vehicle at the corresponding input source frequency pre-obtained.

[0058] Among them, after obtaining the simulation model, the input source frequency in the simulation model can be adjusted, and after each adjustment, determine whether the resonance frequency of the circuit where the drive unit is located meets the specified matching condition with the reference frequency of the circuit where the drive component is located. If it does not meet this matching condition, it means that there is a large deviation between the electrical parameter values of each logic unit and the electrical parameter values of each electrical component in the vehicle during the model establishment process. Therefore, it is necessary to adjust the electrical parameters of each logic unit to ensure the matching degree between the simulation model and the vehicle, so as to ensure the accuracy of using the mapping relationship as the basis for selecting the electrical parameter values of each electrical component of the vehicle.

[0059] In one example, the resonance frequencies causing noise are mainly concentrated in the high-frequency range of 7000 Hz to 11000 Hz. The simulation model can be subjected to sweep frequency tests and simulations in a wide frequency range of 500 Hz to 30000 Hz and the high-frequency band, and the test frequency is stepped at 10 Hz. By comparing the simulation results with the resonance frequencies of experimental tests, the capacitance and inductance parameters in the circuit network can be reasonably adjusted to ensure that the simulation is basically consistent with the test results. This adjustment makes the equivalent simplified circuit simulation model more accurate, so that the natural frequencies of each circuit unit can be calculated more accurately and the resonance frequency points of the circuit unit can be determined.

[0060] If, at a certain input source frequency, the resonant frequency of the circuit where the driving unit is located does not satisfy the specified matching condition with the reference frequency of the circuit where the driving component is located, then the value of the electrical parameter of at least one logic element in the circuit simulation model of the adjustment circuit is adjusted. After each adjustment, the resonant frequency of the driving unit in the circuit simulation model with adjusted electrical parameters is determined at multiple input source frequencies until the determined multiple resonant frequencies satisfy the matching condition with multiple reference resonant frequencies. In this way, the accuracy of using the mapping relationship as the basis for selecting the values of the electrical parameters of each electrical component of the vehicle can be improved.

[0061] Furthermore, when the resonant frequency of the circuit where the driving unit is located does not satisfy the matching condition with the reference frequency of the circuit where the driving component is located, it indicates that there may be a problem with the value of the electrical parameter obtained in advance. At this time, a reminder that the reference frequency is inaccurate can also be issued to remind the designer to re-obtain the reference frequency to ensure the matching degree between the simulation model and the vehicle.

[0062] Optionally, the reference frequency is the resonant frequency of the driving component obtained by the designer when different frequencies of current are input to the vehicle.

[0063] In some embodiments, the matching condition is that the relative error between the resonant frequency of the driving unit and the reference frequency of the driving component is within 5%.

[0064] Among them, in the process of obtaining in advance the values of the electrical parameters of the electrical components of the vehicle corresponding to each logic element, there are many interference factors affecting the values of the electrical parameters of the electrical components of the vehicle, and there is a certain error in the finally obtained values of the electrical parameters. Therefore, when establishing the simulation model, it is impossible to ensure that the electrical parameters of each logic element are exactly the same as the actual values in the vehicle, resulting in an unavoidable error between the resonant frequency of the circuit where the driving unit is located and the reference frequency of the circuit where the driving component is located.

[0065] Among them, if the relative error between the resonant frequency of the circuit where the driving unit is located and the reference frequency of the circuit where the driving component is located is outside 5%, it indicates that the error between the resonant frequency of the circuit where the driving unit is located and the reference frequency of the circuit where the driving component is located is too large. At this time, it is necessary to finely adjust the values of the electrical parameters of each logic unit, or re-obtain the reference frequency to adjust the values of the electrical parameters of each logic unit to control the relative error within 5% (i.e., the acceptable error range), so as to ensure the accuracy of using the mapping relationship as the basis for selecting the values of the electrical parameters of each electrical component of the vehicle.

[0066] Figure 5 Shows based on Figure 2 The effect diagrams before and after the selection of the electrical parameter values of the vehicle based on the shown circuit simulation model. Figure 2It is a circuit simulation model composed of a first driving unit, a first wire harness unit, an input unit, a current detection unit, and an acquisition unit. Regarding Figure 2 For the shown simulation model, the control variable method is adopted, and the sensitivities of the inductance and capacitance parameters of the first driving unit and its first wire harness unit under different setting conditions are mainly discussed. The results of the relevant sensitivity analysis are listed in detail in Table 1.

[0067] Table 1 Sensitivity Analysis Table of Relevant Parameters

[0068]

[0069] Analyzing Table 1, it can be concluded that:

[0070] 1. The higher the capacitance value of the first driving unit, the lower the resonance frequency point. In practice, since increasing the capacitance of the first driving unit will inevitably lead to an increase in the complexity of the spatial structure, even if the limited spatial layout within the first driving unit is not considered, the resonance frequency point is still within the range of 7000 Hz to 11000 Hz.

[0071] 2. The order of magnitude difference between the inductance and capacitance of the first driving unit is relatively large. Increasing the inductance has a very limited effect on reducing the resonance frequency. The effect of increasing the inductance value is the same as that of the capacitor, which is very limited.

[0072] 3. Increasing the inductance of a small amount of the first wire harness unit has a significant effect on reducing the resonance frequency point. It quickly drops from 8500 Hz to below 7000 Hz, and the resonance frequency has avoided the 7000 Hz to 11000 Hz band. The resonance characteristics within this resonance frequency band have also basically disappeared. This frequency avoidance measure helps to avoid the concentration of energy on a specific frequency band, thereby greatly reducing the impact of the ripple current on the vehicle.

[0073] As Figure 5 shown, after selecting the electrical parameter values of the vehicle based on the circuit simulation model shown in Figure 2 the noise emitted by the driving component at different speeds has been significantly reduced. It can be seen that by using the above mapping relationship and reasonably selecting the electrical parameter values of each electrical component of the vehicle, the noise emitted by the driving component during operation can be significantly reduced.

[0074] Based on the same concept, an embodiment of the present disclosure further provides a device for selecting electrical parameter values of a vehicle. The device includes an acquisition module and a recording module. The acquisition module is configured to acquire a circuit simulation model, where the circuit simulation model includes a plurality of circuit units, each circuit unit corresponding to an electrical component of the vehicle. The electrical components of the vehicle include a driving component and a battery. The connections between the plurality of circuit units correspond to the connections between the plurality of electrical components of the vehicle. Each circuit unit is composed of at least one logic element, and each logic element corresponds to an electrical parameter, where the electrical parameter is one of resistance, inductance, and capacitance. The value of the electrical parameter of each logic element is a specified value. The recording module is configured to adjust the value of the electrical parameter of at least one logic element in the circuit simulation model. After each adjustment, the recording module determines the resonance frequency of the driving unit based on the circuit simulation model with the adjusted electrical parameter, and records the mapping relationship between the current set of electrical parameter values and the resonance frequency of the driving unit, where the current set of electrical parameter values includes the current values of the electrical parameters of all logic elements, the driving unit is the circuit unit corresponding to the driving component in the circuit simulation model, and the mapping relationship is used as a basis for selecting the electrical parameter values of each electrical component of the vehicle.

[0075] Based on the same concept, an embodiment of the present disclosure further provides a computer-readable storage medium, which includes computer program instructions. When the computer program instructions are executed by a computing device, the computing device executes the method provided above.

[0076] Based on the same concept, an embodiment of the present disclosure further provides a computer program product including instructions. When the instructions are run by a computing device, the computing device is caused to execute the method provided above.

[0077] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present disclosure. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0078] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present disclosure. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the specification. In all the examples shown and discussed here, any specific values should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

[0079] In the description of the present disclosure, it should be understood that the orientation or positional relationships indicated by orientation terms such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom", etc. are generally based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description. Without contrary statements, these orientation terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present disclosure; the orientation terms "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0080] For the convenience of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "above", etc. can be used here to describe the spatial positional relationship of a device or feature shown in the figure with other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described in the figure of the device. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding explanations will be made for the spatial relative descriptions used here.

[0081] In addition, it should be noted that the use of terms such as "first", "second", etc. to limit components is only for the convenience of distinguishing the corresponding components. Without otherwise stating, the above terms have no special meanings, and thus should not be construed as limiting the protection scope of the present disclosure.

[0082] The above are only the preferred embodiments of the present disclosure and are not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included within the protection scope of the present disclosure.

Claims

1. A method for selecting the value of an electrical parameter of a vehicle, characterized in that, The method comprises: Obtaining a circuit simulation model, wherein the circuit simulation model includes a plurality of circuit units, each circuit unit corresponds to an electrical component of a vehicle, the electrical components of the vehicle include a drive component and a wiring harness component, connections between the plurality of circuit units correspond to connections between the plurality of electrical components of the vehicle, each circuit unit is composed of at least one logic element, each logic element corresponds to an electrical parameter, the electrical parameter being one of resistance, inductance, and capacitance, and the value of the electrical parameter of each logic element is a specified value; Adjust the values of the electrical parameters of at least one logic element in the circuit simulation model. After each adjustment, determine the resonant frequency of the drive unit based on the circuit simulation model after the electrical parameter adjustment, and record the mapping relationship between the current set of electrical parameter values and the resonant frequency of the drive unit, wherein the current set of electrical parameter values includes the current values of the electrical parameters of all logic elements, the drive unit is a circuit unit corresponding to the drive component in the circuit simulation model, and the mapping relationship is used as a basis for selecting the values of the electrical parameters of each electrical component of the vehicle.

2. The method according to claim 1, wherein The method further comprises: Among all the recorded mapping relationships, the target resonant frequency that meets the target conditions is determined, and a target electrical parameter set corresponding to each target resonant frequency is obtained, wherein the target electrical parameter set is used for selection, so that the values of the electrical parameters in the selected target electrical parameter set are used as design reference values of the electrical parameters of each electrical component of the vehicle.

3. The method according to claim 2, characterized in that The target condition is that the resonant frequency of the driving unit is less than a specified frequency.

4. The method according to claim 1, characterized in that, The adjusting the value of the electrical parameter of at least one logic element in the circuit simulation model includes: Adjust the value of an electrical parameter of a logic element in the circuit simulation model.

5. The method according to claim 1, characterized in that The designated numerical value corresponding to each logic element is a pre-acquired value of an electrical parameter of an electrical component of the vehicle corresponding to each logic element.

6. The method according to claim 5, characterized in that Before adjusting the value of the electrical parameter of at least one logic element in the circuit simulation model, the method further includes: Adjust the value of the electrical parameter of at least one logic element in the circuit simulation model, and after each adjustment, determine the resonant frequency of the drive unit in the circuit simulation model after the electrical parameter adjustment under multiple input source frequencies, until the determined multiple resonant frequencies meet the matching condition with multiple reference resonant frequencies, wherein the reference resonant frequency is the pre-acquired resonant frequency of the drive component of the vehicle at the corresponding input source frequency.

7. The method according to claim 6, characterized in that The matching condition is that a relative error between the resonance frequency of the driving unit and the reference frequency of the driving component is within 5%.

8. A device for selecting the value of an electrical parameter of a vehicle, characterized in that: The device includes an acquisition module and a recording module; The acquisition module is used to acquire a circuit simulation model, wherein the circuit simulation model includes a plurality of circuit units, each circuit unit corresponds to an electrical component of the vehicle, the electrical components of the vehicle include a drive component and a battery, connections between the plurality of circuit units correspond to connections between the plurality of electrical components of the vehicle, each circuit unit is composed of at least one logic element, each logic element corresponds to an electrical parameter, the electrical parameter is one of resistance, inductance, and capacitance, and the value of the electrical parameter of each logic element is a specified value; The recording module is used to adjust the values of the electrical parameters of at least one logic element in the circuit simulation model. After each adjustment, the recording module determines the resonant frequency of the drive unit based on the circuit simulation model after the electrical parameters are adjusted, and records the mapping relationship between the current set of electrical parameter values and the resonant frequency of the drive unit, wherein the current set of electrical parameter values includes the current values of the electrical parameters of all logic elements, the drive unit is the circuit unit corresponding to the drive component in the circuit simulation model, and the mapping relationship is used as a basis for selecting the values of the electrical parameters of each electrical component of the vehicle.

9. A computer-readable storage medium, characterized in that: The method comprises computer program instructions, and when the computer program instructions are executed by a computing device, the computing device performs the method according to any one of claims 1 to 7.

10. A computer program product comprising instructions, characterized in that, When the instructions are executed by a computing device, the computing device is caused to perform the method according to any one of claims 1 to 7.

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