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Method and device for testing electric vehicle, method and device for determining remaining mileage and vehicle

A technology for electric vehicles and testers, which is applied to measuring devices, measuring electricity, and measuring electrical variables, etc., and can solve the problems of reduced battery life, subjective determination of vehicle optimization direction, and inability to accurately determine the large attenuation of battery life.

Pending Publication Date: 2021-12-10
GREAT WALL MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

The attenuation rate of low-temperature battery life of electric vehicles in the market is generally 30% to 50%. There are various reasons for the sharp reduction in battery life of electric vehicles in low-temperature scenarios, but manufacturers often attribute the main reason to the air-conditioning and heating energy of the passenger compartment. consumption, while ignoring the influence of other system components, resulting in the direction of vehicle optimization being too subjective
It is impossible to accurately determine the proportion of various reasons that lead to a large decrease in battery life in low temperature scenarios, and accurately optimize the vehicle according to the proportion of each reason

Method used

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  • Method and device for testing electric vehicle, method and device for determining remaining mileage and vehicle
  • Method and device for testing electric vehicle, method and device for determining remaining mileage and vehicle
  • Method and device for testing electric vehicle, method and device for determining remaining mileage and vehicle

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Embodiment Construction

[0033] Specific embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0034] In the following descriptions, terms such as "first" and "second" are only used for the purpose of distinguishing descriptions, and cannot be understood as indicating or implying relative importance, nor can they be understood as indicating or implying order.

[0035] Firstly, the application scenario of the present disclosure will be described. The present disclosure is applied to the scenario where the electric vehicle is at low temperature. In this scenario, the driving range of the electric vehicle will be affected due to various reasons. At present, the attenuation rate is used to evaluate the mileage of electric vehicles in low temperature enviro...

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Abstract

The invention relates to a method and device for testing an electric vehicle, a method and device for determining a remaining mileage and a vehicle, and relates to the technical field of vehicle tests. The method comprises the steps: obtaining the first effective power and the second effective power of each energy consumption system in multiple energy consumption systems and the third effective power and the fourth effective power of a battery system; determining a first power variable quantity of each energy consumption system according to the first effective power and the second effective power of each energy consumption system; determining a second power variation of the battery system according to the third effective power and the fourth effective power; according to the first power variable quantity and the second power variable quantity of each energy consumption system, determining a third power variable quantity of a target system, wherein the target system is composed of a plurality of energy consumption systems and a battery system; and determining a first power variation ratio of each energy consumption system and a second power variation ratio of the battery system according to the first power variation, the second power variation and the third power variation.

Description

technical field [0001] The present disclosure relates to the technical field of vehicle testing, and in particular, relates to a method for testing an electric vehicle, a method and a device for determining remaining mileage, and a vehicle. Background technique [0002] With the rapid development of electric vehicle technology and the continuous increase of user application scenarios, how to further improve the driving range in low temperature environment has become the focus of manufacturers and users on the premise of a certain matching battery capacity of the whole vehicle. [0003] At present, the low-temperature endurance of electric vehicles is evaluated by the attenuation rate, that is, the ratio of the attenuation of the low-temperature endurance mileage relative to the normal temperature endurance mileage to the normal temperature endurance mileage under specific working conditions. The attenuation rate of low-temperature battery life of electric vehicles in the mar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/388G01R31/389G01R31/392G01R31/396
CPCG01R31/388G01R31/389G01R31/392G01R31/396
Inventor 张立庆刘忠华王磊张向鑫范晓雨孙明
Owner GREAT WALL MOTOR CO LTD
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