Battery pack electromagnetic interference modeling simulation and test method

A technology of electromagnetic interference and test method, applied in the field of battery pack system, can solve the problem that the electromagnetic characteristics of the battery pack are difficult to be verified.

Active Publication Date: 2019-10-18
TONGJI UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The current conduction and radiation tests of components are mainly aimed at vehicle components with power supply voltages of 12V and 24V, while the high-voltage battery packs of electric vehicles are usually above 300V. At present, there are no electromag

Method used

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  • Battery pack electromagnetic interference modeling simulation and test method
  • Battery pack electromagnetic interference modeling simulation and test method
  • Battery pack electromagnetic interference modeling simulation and test method

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Embodiment Construction

[0053] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0054] 1. Measurement of high frequency impedance of battery pack

[0055] Power lithium battery impedance characteristics and parasitic parameter test platform such as figure 2 shown. It is composed of lithium ion battery, impedance analyzer, battery charge and discharge test cabinet, constant temperature and humidity testing machine, computer and host computer monitoring software.

[0056] The test environment where the entire test platform is located, except for the special required temperature, all tests are carried out at a constant temperature of 20°C. The computer controls the charge and discharge of the battery through the communication module on the battery charge and discharge test cabinet, and then according to the test specifications...

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Abstract

The invention discloses a battery pack electromagnetic interference modeling simulation and a test method. The method comprises the following steps of firstly determining electromagnetic interferenceelements; then carrying out a battery pack impedance characteristic test, and establishing a high-frequency impedance model of the battery pack; building an equivalent circuit model of the motor driving system based on the high-frequency impedance model of the battery pack; performing joint simulation on the control motor and control system model and the IGBT equivalent circuit model to obtain a simulation result of the common-mode current at the output side of the inverter and the direct-current bus end; carrying out the conduction interference test on the motor driving system, obtaining an experiment result of common-mode current of the output side and the direct-current bus end of the inverter; finally, comparing a simulation result with the experiment result to verify the accuracy of the simulation result. An electromagnetic field in the battery system is simulated through simulation software. The electromagnetic field distribution in the battery system and possible interference conditions during vehicle driving are analyzed. The theoretical support and academic basis are provided for electromagnetic simulation of the battery system and the whole vehicle.

Description

technical field [0001] The present invention relates to the field of battery pack systems, in particular to a battery pack electromagnetic interference modeling simulation and testing method. Background technique [0002] The battery pack is an important high-voltage component of an electric vehicle. Under high frequency conditions, the transient voltage and current generated under complex working conditions will affect the migration of ions in the battery electrolyte, thereby affecting the diffusion effect and polarization effect, resulting in battery impedance and changes in parasitic parameters. At high frequencies, the battery is no longer an ideal equivalent model, and the parasitic parameters of the lithium battery cannot be ignored at this time, which may cause unpredictable electromagnetic interference (EMI) problems. But so far, the battery pack has been regarded as the disturbed object or the propagation path of electromagnetic interference, and has not been studi...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/367G06F30/20
Inventor 张戟吕钰吕相杰
Owner TONGJI UNIV
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