Selection method of voltage and current sampling frequency and filter time window in battery management system

A battery management system and sampling frequency technology, applied in the direction of measuring electricity, measuring electrical variables, instruments, etc., to achieve the effects of ensuring estimation accuracy, reducing processing performance requirements, and eliminating arbitrariness

Active Publication Date: 2022-04-26
SOUTHERN POWER GRID PEAK LOAD & FREQUENCY REGULATION GENERATING CO LTD +1
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Problems solved by technology

[0009] Aiming at the shortcomings of the existing methods, the present invention proposes a method for selecting the voltage and current sampling frequency and filtering time window of the battery management system

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  • Selection method of voltage and current sampling frequency and filter time window in battery management system
  • Selection method of voltage and current sampling frequency and filter time window in battery management system
  • Selection method of voltage and current sampling frequency and filter time window in battery management system

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Embodiment Construction

[0041]The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0042] figure 1 It is a flowchart of a method for selecting a voltage and current sampling frequency and a filtering time window of a battery management system in an embodiment of the present invention. refer to figure 1 As shown, the battery management system voltage and current sampling frequency and filtering time window selection method provided in this embodiment includes the following steps:

[0043] S100, acquiring the frequency component of the current and voltage of the battery in the ba...

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Abstract

The present invention provides a battery management system voltage and current sampling frequency and time window selection method, the method obtains the frequency component of the current and voltage of the battery in the battery energy storage system; selects a suitable frequency component according to the frequency component of the current and voltage of the battery The voltage and current sampling frequency and the filtering time window minimize the deviation of the battery SOC estimation. The present invention can sample the voltage and current with a frequency lower than that required by the sampling theorem without affecting the estimation accuracy of the SOC. While reducing the requirements on the rate performance of the hardware sampling circuit and the processing performance of the processor, the estimation accuracy of the SOC algorithm and the reliability of the battery management system can be guaranteed.

Description

technical field [0001] The present invention relates to the field of battery management, in particular to a method for selecting sampling frequencies and time windows of voltage and current signals of a battery management system. Background technique [0002] In the battery energy storage application of electric vehicles, power grids and micro-grids, the battery management system (Battery Management System, BMS) is an indispensable and important link to achieve safety, reliability and full utilization of batteries. BMS monitors physical quantities such as battery terminal voltage and charge and discharge current in real time, and uses corresponding algorithms to estimate the state of charge (State of Charge-SOC) of the lithium battery cells in the battery pack, based on which it serves as a basis for scientific decision-making on battery control and protection. Based on this, the purpose of maximizing battery performance, improving battery efficiency, and prolonging battery ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/382G01R31/367
CPCG01R31/382G01R31/367
Inventor 李勇琦陈满凌志斌彭鹏朱焕杰胡振恺李毓烜雷旗开梁靓
Owner SOUTHERN POWER GRID PEAK LOAD & FREQUENCY REGULATION GENERATING CO LTD
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