Electric vehicle power battery detection method and system and storage medium

A technology for power batteries and electric vehicles, which is applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., and can solve the problems of inaccurate assessment of the health status of power batteries.

Pending Publication Date: 2022-01-11
CHINA AUTOMOTIVE ENG RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention intends to provide an electric vehicle power battery detection method to solve the technical problem of inaccurate assessment of the health state of the electric vehicle power battery

Method used

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  • Electric vehicle power battery detection method and system and storage medium
  • Electric vehicle power battery detection method and system and storage medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] This embodiment is basically as attached figure 1 Shown: the electric vehicle power battery detection method, comprises the following steps:

[0043] Step S1, connect the charging socket of the electric vehicle to the charging gun of the charging pile, select the working mode of the charging pile as the test sequence mode, and start charging the power battery;

[0044] Step S2, the charging pile obtains the charging power demand of the electric vehicle, and the charging pile initially ignores the charging power demand, and then controls the output current of the charging gun to complete within 0-20 milliseconds from 10% of the maximum current according to the specific working condition file Rapid changes up to 90% of maximum current;

[0045] Step S3, obtain the output voltage and output current of the DC side of the charging gun output terminal at a frequency of 1000 Hz within a period of 20 milliseconds, and retrieve the BMS message data of the electric vehicle withi...

Embodiment 2

[0065] This embodiment is basically the same as Embodiment 1, except that the health status evaluation report includes excellent health status, good health status, and medium health status. If the current power battery health status evaluation report shows that the power battery health status is excellent or good, then The display module 7 reminds the user to test the power battery again within three months; if the evaluation report shows that the health status of the power battery is medium, the display module 7 reminds the user to replace the power battery within two months.

[0066] The specific implementation process of this embodiment is the same as that of Embodiment 1, the difference is that:

[0067] In the fifth step, after the evaluation is completed, the display module 7 will display the health status evaluation report to the user in real time. If the health status evaluation report of the current power battery shows that the power battery health status is excellent ...

Embodiment 3

[0070] This embodiment is basically the same as Embodiment 1, the difference is that this system also includes an intelligent terminal module, including a mobile phone and a tablet computer, and a smart charging APP is installed on the mobile phone and the tablet computer for real-time viewing of the power battery health status evaluation report and Power battery charging progress.

[0071] The specific implementation process of this embodiment is the same as that of Embodiment 1, the difference is that one step is added:

[0072] In the sixth step, the intelligent terminal module of the system performs information interaction with each module through the communication module 6, and the user can view the power battery health status evaluation report and the power battery charging progress in real time through the smart charging APP installed on the mobile phone.

[0073]Existing charging piles cannot be interconnected with smart terminals, and can only check the current chargi...

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Abstract

The invention relates to the technical field of electric vehicles, and discloses an electric vehicle power battery detection method and system and a storage medium, the system comprises a processor module, and a data acquisition module, a power selection module, a charging mode module, a transient current module, a communication module and a display module which are respectively connected with the processor module; the output current of the charging pile is rapidly changed through pulse current to generate transient current, meanwhile, BMS message data of the power battery are obtained, calculation and analysis are conducted through an electrochemical model algorithm, and finally accurate evaluation of the health state of the power battery is achieved. The method has the beneficial effects of high detection efficiency, accurate evaluation result of the health state of the power battery and improvement of the use safety of the electric vehicle.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a detection method, system and storage medium for a power battery of an electric vehicle. Background technique [0002] With the development of the times and the breakthrough of electric vehicle technology, especially the substantial improvement of power battery technology, electric vehicles have become the best choice for the transformation of the automotive industry by virtue of their low cost of use, no exhaust emissions, environmental protection and economy, especially in recent years. Affected by the technological breakthroughs of several major manufacturers, the share of electric vehicles in the market is gradually increasing. With the continuous increase in the use of electric vehicles, it also brings some additional problems, such as fewer charging stations, slow charging speed, power battery safety, etc., especially the safety of power batteries, which involves...

Claims

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Application Information

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IPC IPC(8): G01R31/378G01R31/392G01R31/385
CPCG01R31/378G01R31/392G01R31/385
Inventor 周晶晶张宇张怒涛王舰阳鹏程端前刘川
Owner CHINA AUTOMOTIVE ENG RES INST
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