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A power state prediction method of lithium titanate battery for rail transit

A technology of lithium titanate battery and power state, which is applied in the direction of measuring electricity, measuring device, measuring electrical variables, etc., can solve the problem of inability to take into account complexity and accuracy, and achieve the effect of high precision

Active Publication Date: 2019-03-26
BEIJING BEIJIAO NEW ENERGY TECH CO LTD
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Although various improved electrical models have been proposed in many literatures for the performance of batteries under different rate excitations, none of these models can take into account the complexity and accuracy, and they are all verified within a narrow rate range without involving lithium titanate. Battery

Method used

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  • A power state prediction method of lithium titanate battery for rail transit
  • A power state prediction method of lithium titanate battery for rail transit
  • A power state prediction method of lithium titanate battery for rail transit

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Embodiment Construction

[0055] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0056] like Figure 9 Shown is the overall flow chart of the present invention, the rail transit lithium titanate battery power state prediction method of the present invention, based on the battery improvement model, obtains the reference rate (taken as 1C in the present invention) by OCV-SOC test data According to the parameter values ​​of different SOC, the charging and discharging polarization voltage of the typical rate at each SOC point is obtained, and the battery characteristic parameters are calculated based on the composite method, and the maximum allowable charging and discharging current of the battery and the battery power state are calculated according to the characteristic parameter set.

[0057] On the basis of the above technical solutions, such as figure 1 As shown, the battery improvement model is based on the traditional first-order RC ci...

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Abstract

The invention relates to a track traffic lithium titanate battery power state prediction method. Based on a battery improved model, parameter values of different SOCs under reference multiplying power are obtained through OCV-SOC test data, charge and discharge polarized voltages of each SOC point under typical multiplying power are solved, battery feature parameters are measured and calculated based on a complex method, and according to a feature parameter set, battery maximum allowed charge and discharge currents and battery power states are calculated. The method brought forward by the invention can accurately predict the battery power states in real time, the predicted battery power states are high in precision, at the same time, the method can be directly applied to system-grade simulation, the vehicle power feature can be improved by making full use of a battery power capability, and a theoretical basis is provided for an optimal control strategy in the operation process of a track traffic lithium titanate battery.

Description

technical field [0001] The invention relates to the field of predicting the power state of a power battery, in particular to a method for predicting the power state of a lithium titanate battery used in rail transit. In particular, it refers to the power state prediction method of lithium titanate battery for rail transit based on the improved model of high-precision battery. Background technique [0002] In order to cope with the increasingly serious environmental pollution and energy crisis, the development and popularization of electric vehicles is imminent. As the core component of the electric vehicle power system, the power battery is crucial to the safety and efficiency of vehicle operation. [0003] In recent years, lithium batteries have been widely used in the fields of new energy vehicles and grid energy storage due to their advantages in specific power, specific energy and cycle life. Compared with the power type lithium iron phosphate battery and lithium manga...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/3842G01R31/367
CPCG01R31/367G01R31/3842
Inventor 刘思佳吴健张维戈孟学东韩耸
Owner BEIJING BEIJIAO NEW ENERGY TECH CO LTD