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Prediction method for residual discharging energy of battery based on prediction of future operation condition

A technology for energy prediction and operating conditions, applied in the direction of measuring electrical variables, measuring electricity, measuring devices, etc., can solve problems such as complex vehicle operating conditions, inapplicability, and large amount of calculations

Active Publication Date: 2017-03-08
TSINGHUA UNIV +1
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Problems solved by technology

[0005] The purpose of the present invention is to propose a method for predicting the remaining discharge energy of the battery based on the prediction of future operating conditions. Aiming at the problems of the existing technology, which has a large amount of calculation and cannot be applied to complex vehicle operating conditions, it can be used at various temperatures and conditions. The purpose of accurately predicting the remaining discharge energy of the battery under various power requirements

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  • Prediction method for residual discharging energy of battery based on prediction of future operation condition
  • Prediction method for residual discharging energy of battery based on prediction of future operation condition
  • Prediction method for residual discharging energy of battery based on prediction of future operation condition

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Embodiment Construction

[0048] The method for predicting the remaining discharge energy of a single battery based on the prediction of future operating conditions proposed by the present invention has a flow chart as shown in figure 1 shown, including the following steps:

[0049] (1) Collect the operating condition data of the single battery at the set sampling frequency, including battery current I, voltage U, output power P, state of charge SOC and temperature T;

[0050] (2) According to the output power P and temperature T of the single battery collected in the above step (1), predict the future output power P of the single battery pre and future temperature change rate ΔT pre , the specific process is as follows:

[0051] (2-1) Set the time period t (the time period t is set according to the itinerary of the electric vehicle), and calculate the single battery according to the output power P and temperature T of the single battery in this time period collected in step (1). The average output ...

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Abstract

The invention relates to a prediction method for a residual discharging energy of a battery based on prediction of future operation condition, and belongs to the technical field of battery management. Operation condition data of the battery is collected, and a further output power and a further temperature change rate of the battery are predicted; an internal resistance parameter is identified from a battery equivalent circuit model, and a curve that the internal resistance parameter changes along with the state of charge (SOC) is updated; a prediction interval of the SOC of the battery is determined, and a future SOC sequence of the battery is calculated; a future voltage sequence, a future current sequence and a future temperature sequence of the battery are predicted; and the residual discharging energy of the battery is calculated. According to the method, influence of the future operation condition on the residual discharging energy of the battery is considered, the residual discharging energy of the battery can be predicted in real time, and higher prediction precision can be ensured in different operation conditions.

Description

technical field [0001] The invention relates to a method for predicting remaining discharge energy of a battery based on prediction of future operating conditions, and belongs to the technical field of battery management. Background technique [0002] At present, electric vehicles have problems such as short driving range and inaccurate estimation of remaining mileage, which cannot fully meet the needs of users, and will cause drivers to have "range anxiety". As an energy storage device for electric vehicles, the discharge energy of the power battery directly affects the mileage of the vehicle, and the prediction accuracy of the remaining discharge energy of the battery has a great impact on the estimation accuracy of the remaining mileage of the vehicle, so it is necessary to focus on research. [0003] The remaining discharge energy of the battery is the accumulated energy released by the battery from the current moment to the end of discharge, which is the integral of the...

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Application Information

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IPC IPC(8): G01R31/36
CPCG01R31/367
Inventor 任东生沈萍卢兰光冯旭宁欧阳明高李建秋云强卢艳华
Owner TSINGHUA UNIV
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