Method for testing internal connection looseness of power battery

A technology of internal connection and power battery, which is applied in the direction of measuring electricity, measuring electrical variables, and testing mechanical components, etc. It can solve the problems of increased contact resistance at the connection, achieve economical operation, accurate energy distribution calculation, and facilitate electrical design and Optimized effect

Inactive Publication Date: 2019-06-14
恒大新能源汽车(天津)有限公司
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  • Abstract
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Problems solved by technology

When the connection inside the power battery is loose, it wi

Method used

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  • Method for testing internal connection looseness of power battery

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[0017] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples, and detailed descriptions are as follows with accompanying drawings:

[0018] See figure 1 , A method to test the internal connection of power battery loose, first of all need to test the relationship between the torque change and the resistance of the connection. According to the material and structure of the joint, record the resistance value of the joint of the sample under different torques for data analysis. The second step is to calculate the internal resistance of the battery core, wiring harness, insurance and other components, as well as the internal high-voltage loop resistance of the battery. After the electric vehicle is driving on road conditions, the resistance of the internal circuit of the entire battery is subtracted from the internal resistance of the component to obtain the resistance of the loose internal connection...

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Abstract

The invention relates to a method for testing internal connection looseness of a power battery, and belongs to the technical field of new energy automobiles. The method is characterized by at least further comprising the steps that 1, firstly a plurality of times of testing are conducted, and a relationship between torque change and resistance of a connection part is established according to testresults; 2, internal resistance of a power core, a wiring harness and a safety component and resistance of a high-voltage loop inside the whole battery are calculated; 3, after an electric vehicle runs on a road, the internal resistance of the component is subtracted from the resistance of the internal loop of the whole battery, and the resistance of a connection loosened part of the internal is obtained; and 4, whether the internal connection of the battery is loose or not is determined according to the change of a resistance value at the connection part. According to the method for testing internal connection looseness of the power battery, an influence rule of the torque on the resistance is found by measuring the change of the resistance at the connection part under different connection torques, and then the influence rule is used for judging whether the internal connection of the power battery is loose or not is judged after the electric vehicle is running.

Description

technical field [0001] The invention belongs to the technical field of new energy vehicles; in particular, it relates to a method for testing the internal connection looseness of a power battery. Background technique [0002] New energy vehicles refer to the use of unconventional vehicle fuels as power sources (or the use of conventional vehicle fuels, the use of new vehicle power devices), integrated vehicle power control and advanced technology in driving, the formation of advanced technical principles, with Automobiles with new technology and new structure. New energy vehicles include pure electric vehicles, extended-range electric vehicles, hybrid vehicles, fuel cell electric vehicles, hydrogen engine vehicles, and other new energy vehicles; as we all know, pure electric vehicles are an important part of new energy vehicles; pure electric vehicles A car (Blade Electric Vehicles, BEV) is a car that uses a rechargeable battery as the energy storage power source. [0003]...

Claims

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Application Information

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IPC IPC(8): G01R31/385G01M13/00
Inventor 赵培
Owner 恒大新能源汽车(天津)有限公司
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