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Lightweight evaluation method for electric vehicle body

An evaluation method and technology for electric vehicles, applied in vehicle testing, measuring devices, vehicle impact testing, etc., can solve problems such as large deviations, inability to take into account safety, and achieve the effect of improving accuracy

Active Publication Date: 2021-10-08
CHINA AUTOMOTIVE ENG RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention intends to provide a lightweight evaluation method for electric vehicle body to solve the problems of large deviation in the evaluation results of electric vehicle lightweight and the inability to take safety into account

Method used

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  • Lightweight evaluation method for electric vehicle body
  • Lightweight evaluation method for electric vehicle body
  • Lightweight evaluation method for electric vehicle body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Lightweight evaluation methods for electric vehicle bodies, such as figure 1 shown, including the following steps:

[0042] Step 0: first select several BIWs with the same structural weight to carry out frontal collision tests at the same collision speed and with several preset collision fixing methods, obtain several frontal collision results, and use the collision fixing method with the smallest value in the frontal collision results as the frontal collision test. Collision fixing method for collision test. Taking a small passenger car as an example, the collision fixation methods include a pulley type and a trolley type. The pulley type only has degrees of freedom in the direction of motion, and the trolley type uses a side impact trolley. The trolley in the test of the two fixing methods The weight is the same, 500kg, and the frontal collision test is carried out against the preset rigid wall at various initial collision speeds, for example, the initial collision s...

Embodiment 2

[0073] The difference from Embodiment 1 is that it also includes a computer-readable storage medium storing instructions, and when the instructions are executed by the processor, the method for weight reduction evaluation for electric vehicle body in Embodiment 1 is implemented.

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Abstract

The invention relates to the technical field of electric vehicle performance evaluation, and in particular, relates to a lightweight evaluation method for an electric vehicle body, wherein the lightweight evaluation method comprises the following steps: acquiring safety performance parameters of the electric vehicle body in white in a direct impact test, a side impact test and a top pressure test as vehicle body parameters; and taking the body-in-white with the battery pack as a whole test, and obtaining safety performance parameters of the whole test in a direct impact test, a side impact test and a top pressure test as whole parameters. A body-in-white safety coefficient S1 is calculated according to the body parameters, a body-in-white lightweight coefficient L1 is calculated according to the body parameters of the electric vehicle and the body-in-white safety coefficient S1, the overall parameters are used for calculating an overall safety coefficient S2 of the whole test, and an overall lightweight coefficient L2 is calculated according to the overall parameters and the overall safety coefficient S2; and a lightweight evaluation parameter K=L2 / L1 of the electric vehicle body is obtained according to the overall lightweight coefficient L2 and the body-in-white lightweight coefficient L1. The limitation of a traditional method on the lightweight evaluation of the electric vehicle body is avoided.

Description

technical field [0001] The invention relates to the technical field of performance evaluation of electric vehicles, in particular to a lightweight evaluation method for electric vehicle bodies. Background technique [0002] Electric vehicles are vehicles driven by electric energy. The body of an electric vehicle is basically evolved from the body of a traditional passenger car. Most of the new energy vehicle bodies on the market are traditional fuel vehicle bodies. In order to improve the performance of electric vehicles and meet market demand, electric vehicles need to be changed in terms of the structure of various parts, the number of parts, the size of parts and the location of parts during the design and production of electric vehicles. Therefore, the body of electric vehicles also needs to be changed accordingly. , the lightweight evaluation of the electric vehicle body after meeting the requirements of strength, stiffness, vibration and noise is very important, in ord...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M17/007G06F17/10
CPCG01M17/0078G06F17/10
Inventor 冯毅万鑫铭周佳高翔
Owner CHINA AUTOMOTIVE ENG RES INST
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