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Battery health state estimation method for real new energy automobile

A battery health status, new energy vehicle technology, applied in the direction of testing electrical devices in transportation, measuring electricity, measuring electrical variables, etc., can solve the problem of inability to overcome low workload, low efficiency of test results, incomplete simulation, etc. question

Active Publication Date: 2021-09-17
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
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Problems solved by technology

However, due to the incomplete simulation of the real working conditions of the vehicle in the test environment, and the differences in performance indicators between batteries of different materials and structures, the test results cannot be referred to each other. In order to cover various working conditions as comprehensively as possible and expand the data volume, in When using the above-mentioned IC method and other suitable methods, the problems of heavy workload and low efficiency cannot be overcome

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  • Battery health state estimation method for real new energy automobile

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Embodiment Construction

[0031] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0032] The battery state of health estimation method for real new energy vehicles provided by the present invention, such as figure 1 As shown, it specifically includes the following steps:

[0033] Step 1. From the real vehicle data of new energy vehicles collected by the on-board big data platform, select charging segments with constant current, the same current, and charging time greater than a predetermined value, and record the charging voltage, charging current, charging time and other data in the segmen...

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Abstract

The invention provides a battery health state estimation method for a real new energy automobile. The method effectively solves the technical problems that the state of health of a battery pack cannot be measured in the existing power battery SOH estimation and the estimation result cannot meet the precision requirement by organically combining an existing easily-obtained SOH prediction equation of a single body level with a pack-level capacity increment IC value calculated by massive real automobile big data, and can avoid manpower and material resource consumption caused by carrying out a large number of cyclic aging tests, calibration and data processing on the battery pack.

Description

technical field [0001] The invention belongs to the technical field of big data of new energy vehicles, and in particular relates to a method for detecting the health state of a power battery by using big data of new energy vehicles. Background technique [0002] As the core component of the new energy vehicle power system, the power battery has an important impact on the driving performance, safety and other aspects of the vehicle. Therefore, power battery SOH estimation is also one of the hot issues in the field of new energy vehicles. . At present, power batteries often use the form of battery packs. Due to the limitations of actual conditions, it is difficult to obtain the real SOH of battery packs in actual operation through measurement methods. The daily charging and discharging behavior cannot meet the needs of test calibration, and even Executing the calibration also has the problems of huge workload and low efficiency. The existing technology mainly focuses on per...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/392G01R31/367G01R31/36G01R31/396G01R31/388G01R31/00
CPCG01R31/392G01R31/367G01R31/3648G01R31/396G01R31/388G01R31/006Y02T10/70
Inventor 王震坡佘承其刘鹏张照生林倪武烨
Owner BEIJING INSTITUTE OF TECHNOLOGYGY