Incremental capacity curve determination method based on real vehicle charging data

A capacity curve and capacity technology, which is applied in the field of health state estimation of new energy vehicle power batteries, can solve the problems of sensitive data noise, not as good as obtaining in a laboratory environment, and high computing costs, so as to reduce demand and promote realization.

Pending Publication Date: 2022-04-19
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

In some existing technologies based on real vehicle big data, due to the low performance of existing sensors and transmission equipment, the quality of the data collected by the big data platform is not even as good as the data obtained in the laboratory envi

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  • Incremental capacity curve determination method based on real vehicle charging data
  • Incremental capacity curve determination method based on real vehicle charging data
  • Incremental capacity curve determination method based on real vehicle charging data

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Embodiment Construction

[0037] 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.

[0038] The incremental capacity curve determination method based on real vehicle charging data provided by the present invention, such as figure 1 As shown, it specifically includes the following steps:

[0039] Step 1. The on-board remote terminal uploads the original data including current, voltage and time items in the actual vehicle operation to the big data platform;

[0040] Step 2: The big data platform processes the received raw data, extracts charging behavior data from the raw data based on the char...

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Abstract

The invention provides an incremental capacity curve determination method based on real vehicle charging data, and the method employs a Hermite interpolation polynomial to fit the function relation between the capacity and the voltage in each charging segment, can guarantee the precise calculation of the characteristics of an incremental capacity curve, remarkably reduces the demands for calculation resources, and improves the calculation efficiency. Therefore, implementation of real-time SOH estimation of the new energy vehicle based on a remote big data platform is facilitated, and the method has many beneficial effects which are not achieved in the prior art.

Description

technical field [0001] The invention belongs to the technical field of health state estimation of power batteries of new energy vehicles, and in particular relates to a method for determining incremental capacity curves based on actual vehicle charging data. Background technique [0002] For pure electric new energy vehicles, the power battery will inevitably degrade in energy and power during use, which will correspondingly lead to a decline in driving range and power performance. Therefore, how to achieve accurate power battery state-of-health (SOH) estimation is of crucial significance to the efficient and safe operation of vehicles. Incremental capacity analysis of batteries is an important approach in the field of power battery SOH estimation, which quantitatively estimates SOH by obtaining features such as peak height, position, and area in the incremental capacity (Incremental capacity, IC) curve. However, most IC curve determination and optimization methods are only...

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Application Information

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IPC IPC(8): G01R31/392G01R31/387
CPCG01R31/392G01R31/387
Inventor 王震坡吴益忠刘鹏张照生林倪佘承其
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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