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Cell SOC on-line calibration method

A battery state of charge and calibration method technology, which is applied in the direction of measuring electricity, measuring electrical variables, instruments, etc., can solve the problem of large error in battery state of charge estimation

Active Publication Date: 2015-10-21
东方电气洁能科技成都有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims to solve the problem of large estimation error of battery state of charge in the existing dynamic situation, and provides an online calibration method of state of charge, which can perform online, fast and simple state of charge of the battery, and Battery harmless calibration, which improves the accuracy and precision of battery state-of-charge estimates

Method used

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  • Cell SOC on-line calibration method

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Embodiment Construction

[0046] The present invention will be further described below through specific embodiments and in conjunction with the accompanying drawings, but the present invention is not limited to the embodiments.

[0047] An online calibration method for the state of charge of a battery, comprising the following specific steps:

[0048] a. Determine the state of the battery, if the battery is in a charging state, then perform step b, if the battery is in a discharging state, then perform step c;

[0049] b. Judging whether the battery meets the charging calibration conditions, if so, execute step d, and if not, exit;

[0050] c. Judging whether the battery meets the discharge calibration conditions, if so, execute step d, and if not, exit;

[0051] d. Perform battery state-of-charge calibration.

[0052] In step b, the specific process for judging whether the battery meets the charging calibration conditions is as follows:

[0053] 1. Process the relationship curve when the battery is...

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Abstract

The invention discloses a cell SOC (State Of Charge) on-line calibration method, comprising: determining whether a cell meets calibration conditions in dependence on the charge-discharge state in which a cell is located and executing cell SOC calibration when the cell meets calibration conditions; and simply processing the real-time operation data of the cell, so as to realize SOC calibration. The method can realize rapid and simple on-line calibration on a SOC, cause no damage to the cell, and improve SOC estimation accuracy and precision under a dynamic state.

Description

technical field [0001] The invention relates to the field of battery management systems, in particular to an online calibration method for the state of charge of a battery. Background technique [0002] A battery is a device that converts the chemical energy stored in active materials into electrical energy through an electrochemical redox reaction. It can power notebooks, mobile communication tools, and electric vehicles. Users need to accurately monitor the state of the battery to ensure the rational use of the battery. In every system that uses electrochemical storage of energy, the estimation and indication of the state of charge (State of Charge, abbreviated as SOC) are important requirements. [0003] Currently commonly used SOC estimation methods include open circuit voltage method, ampere-hour integral method, neural network method, Kalman filter method, etc., but in actual work due to the complexity of the process involved in battery operation (such as different rat...

Claims

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Application Information

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IPC IPC(8): G01R31/36
Inventor 吴仕明唐刚王睿
Owner 东方电气洁能科技成都有限公司
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