High-voltage wiring harness safety determination method and system based on vehicle collision scene

Abstract

The invention provides a high-voltage wiring harness safety judgment method and system based on a vehicle collision scene, and relates to the field of high-voltage wiring harness safety judgment, and the method comprises the steps: obtaining a vehicle collision scene, and carrying out the digital simulation calculation of a whole vehicle; recording the extruded position, the extrusion area and the simulated extrusion force of the high-voltage wire harness according to a calculation result, and designing an extrusion pressure head of the high-voltage wire harness according to the extrusion area; performing a physical extrusion test on the high-voltage wire harness according to the high-voltage wire harness extrusion pressure head to obtain a test extrusion force; judging whether the simulated extrusion force is not greater than the test extrusion force * 90%; if yes, the high-voltage wire harness is safe, and design is ended; and if not, determining that the high-voltage wire harness has the risk of being extruded to fail, readjusting the engineering design, and returning to execute the steps of acquiring the vehicle collision scene and carrying out the whole vehicle digital simulation calculation according to the collision scene until the simulation extrusion force is not greater than the test extrusion force * 90%. The method breaks through the limitation of a single test evaluation method, and provides an engineering solution for the protection design of the high-voltage wiring harness.

Description

Technical Field

[0001] The present invention relates to the technical field of high-voltage wire harness safety determination, and in particular to a method and system for determining the safety of a high-voltage wire harness in a vehicle collision scenario. Background Art

[0002] High-voltage wire harnesses are high-safety components in new energy vehicles. They are basic components of new energy vehicles and are one of the many wire harnesses in the entire vehicle.

[0003] The existing methods for determining the safety (failure) of high-voltage wire harnesses are generally based on the extrusion mechanical performance test of high-voltage wire harness components, without considering the extrusion of high-voltage wire harnesses in actual collision scenarios. As a result, the current methods for determining the safety (failure) of high-voltage wire harnesses are single and highly limited. Summary of the Invention

[0004] Based on this, the purpose of the present invention is to provide a method and system for determining the safety of high-voltage wire harnesses in vehicle collision scenarios, so as to solve the technical problems in the prior art of the single and highly limited methods for determining the safety of high-voltage wire harnesses.

[0005] In one aspect, the present invention provides a method for determining the safety of a high-voltage wiring harness in a vehicle collision scenario, comprising:

[0006] Obtaining vehicle collision scenarios and performing digital simulation calculations of the entire vehicle based on the collision scenarios, wherein the collision scenarios include an FCP 43 kph center pillar collision scenario, an FRB 56 kph frontal collision scenario, and an ODB 64 kph 40% offset collision scenario;

[0007] Record the extruded position, extrusion area and simulated extrusion force Fmax of the high-voltage wire harness according to the digital simulation calculation results of the whole vehicle 仿真 , and designing a high-voltage wire harness extrusion head according to the extrusion area;

[0008] Perform a physical extrusion test on the high-voltage wire harness according to the high-voltage wire harness extrusion head to obtain the test extrusion force Fmax 测试 ;

[0009] Determine the simulated extrusion force Fmax 仿真 Is it not greater than the test extrusion force Fmax? 测试 *90%;

[0010] If yes, the high voltage harness is safe and the design is finished;

[0011] If not, the high-voltage wiring harness is at risk of failure due to extrusion. The engineering design should be readjusted and the process should be repeated to obtain the vehicle collision scenario and perform digital simulation of the vehicle according to the collision scenario until the simulated extrusion force Fmax is reached. 仿真Not greater than the test extrusion pressure Fmax 测试 *90%.

[0012] This method for assessing the safety of high-voltage wiring harnesses in vehicle collision scenarios considers actual collision scenarios and overcomes the limitations of traditional single-test evaluation methods by establishing a three-tiered research framework encompassing material constitutive properties, component mechanical response, and the overall vehicle collision environment. Furthermore, this application couples experimental data with collision simulation results to propose a quantitative evaluation index for high-voltage wiring harnesses' crush resistance, including a 10% safety margin. This provides an engineering solution for high-voltage wiring harness protection design and addresses the technical limitations of existing high-voltage wiring harness safety assessment methods, which are limited and limited.

[0013] In addition, the above-mentioned method for determining the safety of a high-voltage wire harness in a vehicle collision scenario according to the present invention may also have the following additional technical features:

[0014] Furthermore, the digital simulation calculation of the whole vehicle is carried out using the LS-DYNA solver.

[0015] Furthermore, in the step of performing digital simulation calculation of the entire vehicle according to the collision scenario:

[0016] According to the constitutive properties of high-voltage wiring harness materials, a two-component equivalent model is used to simulate its structural and mechanical characteristics.

[0017] Furthermore, in the step of designing a high-voltage wire harness extrusion head according to the extrusion area:

[0018] When the extrusion area is large, the contact area between the indenter and the harness is large, so a cylindrical indenter with a suitable diameter should be designed;

[0019] When the extrusion area is small, the contact area between the indenter and the wiring harness is small, so a wedge-shaped indenter with a suitable angle should be designed.

[0020] Furthermore, adjustments to the engineering design include adjusting the position of the high-voltage wiring harness and adding protective baffles.

[0021] Furthermore, a high-voltage wire harness extrusion pressure head is used to perform a physical extrusion test on the high-voltage wire harness to obtain a test extrusion force Fmax. 测试 In the steps:

[0022] Perform physical extrusion test on high voltage wire harness on universal testing machine and record the test results.

[0023] Another aspect of the present invention provides a high-voltage wiring harness safety determination system based on a vehicle collision scenario, comprising:

[0024] An acquisition module is used to acquire vehicle collision scenarios and perform digital simulation calculations of the entire vehicle based on the collision scenarios. The collision scenarios include an FCP 43kph center column collision scenario, an FRB 56kph frontal collision scenario, and an ODB 64kph 40% offset collision scenario.

[0025] Simulation module, used to record the extruded position, extrusion area and simulated extrusion force Fmax of the high-voltage wire harness based on the digital simulation calculation results of the whole vehicle 仿真 , and designing a high-voltage wire harness extrusion head according to the extrusion area;

[0026] Test module, used to perform physical extrusion test on high-voltage wire harness according to the high-voltage wire harness extrusion head to obtain the test extrusion force Fmax 测试 ;

[0027] Judgment module, used to judge the simulation extrusion force Fmax 仿真 Is it not greater than the test extrusion force Fmax? 测试 *90%;

[0028] The first execution module is used to simulate the extrusion force Fmax 仿真 Not greater than the test extrusion pressure Fmax 测试 *When it reaches 90%, the high-voltage wiring harness is safe and the design is completed;

[0029] The second execution module is used to simulate the extrusion force Fmax 仿真 Greater than the test extrusion force Fmax 测试 * When the pressure reaches 90%, the high-voltage wiring harness is at risk of failure due to extrusion. The engineering design should be readjusted and the process should be repeated to obtain the vehicle collision scenario and perform digital simulation of the vehicle according to the collision scenario until the simulated extrusion force Fmax is reached. 仿真 Not greater than the test extrusion pressure Fmax 测试 *90%.

[0030] Another aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the above-mentioned method for determining the safety of a high-voltage wire harness in a vehicle collision scenario.

[0031] On the other hand, the present invention also provides a data processing device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the method for determining the safety of a high-voltage wire harness in a vehicle collision scenario as described above is implemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a flow chart of a method for determining the safety of a high-voltage wire harness in a vehicle collision scenario according to a first embodiment of the present invention;

[0033] The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0034] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. The drawings illustrate several embodiments of the present invention. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present invention.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0036] In order to solve the technical problems in the existing technology of the single and highly limited methods for determining the safety of high-voltage wire harnesses. This application provides a method and system for determining the safety of high-voltage wire harnesses based on vehicle collision scenarios. Specifically, this application considers actual collision scenarios and breaks through the limitations of traditional single test evaluation methods by establishing a three-level research framework of material constitutive properties, component mechanical response, and vehicle collision environment. Furthermore, this application couples the experimental data with the collision simulation results for analysis, and proposes a quantitative evaluation index for the extrusion resistance of high-voltage wire harnesses with a 10% safety margin, providing an engineering solution for the protection design of high-voltage wire harnesses.

[0037] To facilitate understanding of the present invention, several embodiments of the present invention are provided below. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive disclosure of the present invention.

[0038] Example 1

[0039] See also Figure 1 , which shows a method for determining the safety of a high-voltage wire harness in a vehicle collision scenario in a first embodiment of the present invention, the method includes steps S101 to S106:

[0040] S101: Obtain a vehicle collision scenario, and perform digital simulation calculation of the entire vehicle based on the collision scenario.

[0041] As a specific example, the collision scenarios include a 43kph center-pillar collision (FCP), a 56kph frontal collision (FRB), and a 64kph 40% offset collision (ODB). In this example, a two-component equivalent model was used to simulate the structural and mechanical characteristics of the high-voltage wiring harness based on its constitutive properties. Furthermore, the LS-DYNA solver was used for digital vehicle simulation.

[0042] S102. Record the squeezed position, squeezed area, and simulated squeeze force Fmax of the high-voltage wire harness based on the vehicle digital simulation calculation results. 仿真 , and design the high-voltage wire harness extrusion head according to the extrusion area.

[0043] In this embodiment, the squeezed position refers to a section of the high-voltage wire harness, for example, the high-voltage wire harness section passing through the vacuum booster pump and the gearbox; the squeezed area is used to design the pressure head for the actual squeeze test of the high-voltage wire harness, the purpose of which is to more accurately reflect the squeezed state of the high-voltage wire harness in the vehicle environment; the simulated squeeze force Fmax 仿真 The value is used to compare with the actual test value.

[0044] Specifically, in this embodiment, when the extrusion area is large, the contact area between the pressure head and the wire harness is large, and a cylindrical pressure head with a suitable diameter is designed; when the extrusion area is small, the contact area between the pressure head and the wire harness is small, and a wedge-shaped pressure head with a suitable angle is designed.

[0045] S103, perform a physical extrusion test on the high-voltage wire harness according to the high-voltage wire harness extrusion head to obtain a test extrusion force Fmax 测试 .

[0046] Specifically, a physical extrusion test is performed on the high-voltage wire harness on a universal testing machine, and the test results are recorded.

[0047] S104, judging the simulated extrusion force Fmax 仿真 Is it not greater than the test extrusion force Fmax? 测试 *90%.

[0048] If the simulated extrusion pressure Fmax 仿真 Not greater than the test extrusion pressure Fmax 测试 *90%, the high-voltage harness is safe, and step S105 is executed; if the simulated extrusion force Fmax 仿真 Is it greater than the test extrusion force Fmax? 测试 *90%, the high-voltage wiring harness is at risk of failure due to extrusion, and step S106 is executed, and the process returns to step S101 until the simulated extrusion force Fmax is reached. 仿真 Not greater than the test extrusion pressure Fmax 测试 *90%.

[0049] S105. End the design.

[0050] When the simulated extrusion force Fmax 仿真 Not greater than the test extrusion pressure Fmax 测试 When the error rate reaches 90%, the high-voltage wiring harness is safe, the design is terminated, and the current engineering solution is adopted.

[0051] S106. Readjust the engineering design.

[0052] As a specific example, engineering design adjustments include repositioning the high-voltage wiring harness and adding protective shields. Digital vehicle simulations for various collision scenarios are then re-run until the high-voltage wiring harness is deemed safe, concluding the design.

[0053] In summary, the high-voltage wiring harness safety assessment method based on vehicle collision scenarios in the above-mentioned embodiments of the present invention considers actual collision scenarios and overcomes the limitations of traditional single-test evaluation methods by establishing a three-tiered research framework encompassing material constitutive properties, component mechanical response, and the entire vehicle collision environment. Furthermore, this application couples experimental data with collision simulation results to analyze and propose a quantitative evaluation index for high-voltage wiring harnesses in terms of compression resistance, including a 10% safety margin. This provides an engineering solution for high-voltage wiring harness protection design and addresses the technical issues of the existing single and limited high-voltage wiring harness safety assessment methods.

[0054] Example 2

[0055] A second embodiment of the present invention provides a high-voltage wiring harness safety assessment system based on a vehicle collision scenario, comprising:

[0056] An acquisition module is used to acquire vehicle collision scenarios and perform digital simulation calculations of the entire vehicle based on the collision scenarios. The collision scenarios include an FCP 43kph center column collision scenario, an FRB 56kph frontal collision scenario, and an ODB 64kph 40% offset collision scenario.

[0057] Simulation module, used to record the extruded position, extrusion area and simulated extrusion force Fmax of the high-voltage wire harness based on the digital simulation calculation results of the whole vehicle 仿真 , and designing a high-voltage wire harness extrusion head according to the extrusion area;

[0058] Test module, used to perform physical extrusion test on high-voltage wire harness according to the high-voltage wire harness extrusion head to obtain the test extrusion force Fmax 测试 ;

[0059] Judgment module, used to judge the simulation extrusion force Fmax 仿真 Is it not greater than the test extrusion force Fmax? 测试 *90%;

[0060] The first execution module is used to simulate the extrusion force Fmax仿真 Not greater than the test extrusion pressure Fmax 测试 *When it reaches 90%, the high-voltage wiring harness is safe and the design is completed;

[0061] The second execution module is used to simulate the extrusion force Fmax 仿真 Greater than the test extrusion force Fmax 测试 * When the pressure reaches 90%, the high-voltage wiring harness is at risk of failure due to extrusion. The engineering design should be readjusted and the process should be repeated to obtain the vehicle collision scenario and perform digital simulation of the vehicle according to the collision scenario until the simulated extrusion force Fmax is reached. 仿真 Not greater than the test extrusion pressure Fmax 测试 *90%.

[0062] In summary, the high-voltage wiring harness safety assessment system in the vehicle collision scenario described above, taking into account actual collision scenarios, overcomes the limitations of traditional single-test evaluation methods by establishing a three-tiered research framework encompassing material constitutive properties, component mechanical response, and the overall vehicle collision environment. Furthermore, this application couples experimental data with collision simulation results to analyze and propose a quantitative evaluation index for high-voltage wiring harnesses' compression resistance, including a 10% safety margin. This provides an engineering solution for high-voltage wiring harness protection design and addresses the technical issues inherent in existing high-voltage wiring harness safety assessment methods, which are characterized by their single nature and high limitations.

[0063] In addition, an embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon, which implements the steps of the method in the above embodiment when the program is executed by a processor.

[0064] In addition, an embodiment of the present invention further provides a data processing device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method in the above embodiment when executing the program.

[0065] The logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing the logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (e.g., a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device). For purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by, or in conjunction with, an instruction execution system, apparatus, or device.

[0066] More specific examples (a non-exhaustive list) of computer-readable media include the following: an electrical connection with one or more wires (electronic devices), a portable computer disk cartridge (magnetic devices), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disc read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering, or processing in another suitable manner as necessary, and then stored in a computer memory.

[0067] It should be understood that various parts of the present invention can be implemented using hardware, software, firmware, or a combination thereof. In the above-described embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0068] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0069] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A method for determining the safety of a high-voltage wiring harness in a vehicle collision scenario, characterized in that: include: Obtaining vehicle collision scenarios and performing digital simulation calculations of the entire vehicle based on the collision scenarios, wherein the collision scenarios include an FCP 43 kph center pillar collision scenario, an FRB 56 kph frontal collision scenario, and an ODB 64 kph 40% offset collision scenario; Record the extruded position, extrusion area and simulated extrusion force Fmax of the high-voltage wire harness according to the digital simulation calculation results of the whole vehicle 仿真 , and designing a high-voltage wire harness extrusion head according to the extrusion area; Perform a physical extrusion test on the high-voltage wire harness according to the high-voltage wire harness extrusion head to obtain the test extrusion force Fmax 测试 ; Determine the simulated extrusion force Fmax 仿真 Is it not greater than the test extrusion force Fmax? 测试 *90%; If yes, the high voltage harness is safe and the design is finished; If not, the high-voltage wiring harness is at risk of failure due to extrusion. The engineering design should be readjusted and the process should be repeated to obtain the vehicle collision scenario and perform digital simulation of the vehicle according to the collision scenario until the simulated extrusion force Fmax is reached. 仿真 Not greater than the test extrusion pressure Fmax 测试 *90%.

2. The method for determining the safety of a high-voltage wire harness in a vehicle collision scenario according to claim 1, wherein: The digital simulation calculation of the whole vehicle is carried out using the LS-DYNA solver.

3. The method for determining the safety of a high-voltage wire harness in a vehicle collision scenario according to claim 1, wherein: In the step of performing digital simulation calculation of the entire vehicle according to the collision scenario: According to the constitutive properties of high-voltage wiring harness materials, a two-component equivalent model is used to simulate its structural and mechanical characteristics.

4. The method for determining the safety of a high-voltage wire harness in a vehicle collision scenario according to claim 1, wherein: In the step of designing a high-voltage wire harness extrusion head according to the extrusion area: When the extrusion area is large, the contact area between the indenter and the harness is large, so a cylindrical indenter with a suitable diameter should be designed; When the extrusion area is small, the contact area between the indenter and the wiring harness is small, so a wedge-shaped indenter with a suitable angle should be designed.

5. The method for determining the safety of a high-voltage wire harness in a vehicle collision scenario according to claim 1, wherein: Adjustments to the engineering design include adjusting the position of the high-voltage wiring harness and adding protective baffles.

6. The method for determining the safety of a high-voltage wire harness in a vehicle collision scenario according to claim 1, wherein: Perform a physical extrusion test on the high-voltage wire harness according to the high-voltage wire harness extrusion head to obtain the test extrusion force Fmax 测试 In the steps: Perform physical extrusion test on high voltage wire harness on universal testing machine and record the test results.

7. A high-voltage wiring harness safety assessment system based on vehicle collision scenarios, characterized in that: The system comprises: An acquisition module is used to acquire vehicle collision scenarios and perform digital simulation calculations of the entire vehicle based on the collision scenarios. The collision scenarios include an FCP 43kph center column collision scenario, an FRB 56kph frontal collision scenario, and an ODB 64kph 40% offset collision scenario. Simulation module, used to record the extruded position, extrusion area and simulated extrusion force Fmax of the high-voltage wire harness based on the digital simulation calculation results of the whole vehicle 仿真 , and designing a high-voltage wire harness extrusion head according to the extrusion area; Test module, used to perform physical extrusion test on high-voltage wire harness according to the high-voltage wire harness extrusion head to obtain the test extrusion force Fmax 测试 ; Judgment module, used to judge the simulation extrusion force Fmax 仿真 Is it not greater than the test extrusion force Fmax? 测试 *90%; The first execution module is used to simulate the extrusion force Fmax 仿真 Not greater than the test extrusion pressure Fmax 测试 *When it reaches 90%, the high-voltage wiring harness is safe and the design is completed; The second execution module is used to simulate the extrusion force Fmax 仿真 Greater than the test extrusion force Fmax 测试 * When the pressure reaches 90%, the high-voltage wiring harness is at risk of failure due to extrusion. The engineering design should be readjusted and the process should be repeated to obtain the vehicle collision scenario and perform digital simulation of the vehicle according to the collision scenario until the simulated extrusion force Fmax is reached. 仿真 Not greater than the test extrusion pressure Fmax 测试 *90%.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method for determining the safety of a high-voltage wire harness in a vehicle collision scenario according to any one of claims 1 to 6 is implemented.

9. A data processing device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the method for determining the safety of a high-voltage wire harness in a vehicle collision scenario according to any one of claims 1 to 6 is implemented.

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