Method applicable to SOC-OCV curve calibration of flow cell

A technology of SOC-OCV and liquid flow battery, which is applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve the problems of not being suitable for engineering practice and high cost investment, and achieve the purpose of avoiding capacity or energy recording meters, good effect, and method Simple and practical effect

Active Publication Date: 2015-05-27
ARMY ENG UNIV OF PLA
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Problems solved by technology

As the power of the vanadium battery stack continues to increase, the cost of battery testing equipment used to calibrate the SOC-OCV curve is higher, which is not suitable for engineering practice, especially when the SOC-OCV curve needs to be calibrated regularly during the use of vanadium batteries.

Method used

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  • Method applicable to SOC-OCV curve calibration of flow cell
  • Method applicable to SOC-OCV curve calibration of flow cell
  • Method applicable to SOC-OCV curve calibration of flow cell

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Embodiment Construction

[0023] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0024] Such as figure 1 As shown, there are two different main structure forms in the application of vanadium batteries at present, figure 1 a is a vanadium battery application system, this embodiment needs to use the right figure ( figure 1 The main structure of b) establishes a reasonable vanadium battery application experimental platform, which can be based on the existing system. Mainly include: external power supply used to control the flow battery in rotating hot standby, AC / DC charger, common load (that is, the load does not have characteristics such as large instantaneous power fluctuations or relatively slow power fluctuations, such as resistive loads) and vanadium batteries Management system (capable of detecting and recording relevant data such as battery current, voltage, electrolyte temperature, etc.).

[0025] Fully charge the battery...

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Abstract

The invention discloses a method applicable to SOC-OCV curve calibration of a flow cell. The method comprises the following steps: (1) charging the cell in a constant-current constant-voltage mode, and performing discharging on the cell; (2) performing discharging in a small current manner, wherein the small current is selected according to the load of a vanadium cell in rotational heat spare operation; (3) charging the vanadium cell in the constant-current constant-voltage mode at the room temperature so as to enable the vanadium cell to be in a fully charged state, and performing discharging in the small-current manner; (4) importing discharge data acquired by a cell management system into MATLAB for processing, equally dividing the discharge energy into ten parts, and acquiring the time point when every 1/10 of the energy is discharged; (5) re-charging the cell in the constant-current constant-voltage mode, cutting off a charge power supply after the cell is completely charged, keeping the vanadium cell being in the rotational heat spare state for M minutes, and recording the open circuit voltage OCV0; (6) further performing sectional processing on the discharge data acquired by the cell management system; (7) drawing a table, thereby obtaining SOC-OCV experiment data.

Description

technical field [0001] The invention relates to the calibration of the SOC (state of charge)-open circuit voltage (OCV) curve of a liquid flow battery, in particular to a calibration method for the SOC-OCV curve of a liquid flow battery based on engineering practice. Background technique [0002] With the rapid deterioration of the global environment and the increasingly tense energy sources, the micro-grid form of renewable energy power generation will play an increasingly important role in the future power system. However, due to the intermittent, volatile, and random nature of renewable energy, the quality of power supply is low, and it is difficult to connect to the grid or directly provide stable and reliable power to electrical equipment. In order to effectively solve the problems of low utilization rate of renewable energy power generation and poor quality of power supply, the energy storage battery and renewable energy power generation unit are combined to form an in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36
Inventor 王金全方建华徐晔张海涛韩航星严鋆邵亚来刘松陈凯严豪杰
Owner ARMY ENG UNIV OF PLA
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