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Battery model parameter estimation method and device

A parameter estimation and battery model technology, applied in the direction of measuring devices, measuring electricity, measuring electrical variables, etc., can solve the problems that the Thevenin model parameters cannot be obtained quickly, and the ideal environment cannot be provided, so as to achieve fast model parameter estimation and improve calculation speed and recognition speed, the effect of improving the recognition speed

Inactive Publication Date: 2020-05-29
NORTH CHINA UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above traditional method of identifying battery parameters cannot quickly obtain Thevenin's model parameters
This is because OCV needs to stand for a long time, and the polarization voltage needs to create a state of zero input response, which cannot provide an ideal environment in actual use.

Method used

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  • Battery model parameter estimation method and device
  • Battery model parameter estimation method and device
  • Battery model parameter estimation method and device

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Experimental program
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Embodiment 1

[0034] Such as figure 1 with figure 2 As shown, Embodiment 1 of the present invention discloses a battery model parameter estimation method, which includes the following steps: establishing the Thevenin model of the battery to be estimated; determining the terminal voltage U, current I, and ohmic voltage of the battery R drop Ω I and polarization voltage U p;According to Thevenin model, based on battery terminal voltage U, current I, ohmic voltage drop R Ω I and polarization voltage U p To establish a relational expression; carry out discrete operation and transformation operation on the relational expression to obtain a transformation expression, and the transformation expression has a parameter θ to be estimated; use the identification algorithm to perform parameter estimation on the parameter θ to be estimated, so as to obtain the estimated value of the parameter θ to be estimated; based on The estimated value of the parameter θ to be estimated is used to obtain the es...

Embodiment 2

[0055] Such as image 3 As shown, Embodiment 2 of the present invention provides a device for estimating battery model parameters, including: an establishment module for establishing the Thevenin model of the battery to be estimated; a determination module for determining the terminal voltage U, current I, and ohmic voltage of the battery R drop Ω I and polarization voltage U p ;Equation module for terminal voltage U, current I, ohmic voltage drop R of the battery based on the Thevenin model Ω I and polarization voltage U p To establish a relational expression; the calculation module is used to perform discrete operations and transformation operations on the relational expression to obtain a transformation expression, and the transformation expression has a parameter θ to be estimated; the identification module is used to estimate the parameter θ to be estimated through the identification algorithm, so as to obtain Obtain the estimated value of the parameter θ to be estimat...

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Abstract

The invention provide a battery model parameter estimation method and device. The method comprises steps of establishing a Thevenin model of a to-be-estimated battery; determining a terminal voltage U, a current I, an ohmic voltage drop R [omega] I and a polarization voltage Up of a battery; establishing a relational expression based on the terminal voltage U, the current I, the ohm voltage drop R[omega] I and a polarization voltage Up pair of the battery; performing discrete operation and transformation operation of the relational expression to obtain a transformation expression, wherein thetransformation expression has a to-be-estimated parameter theta; performing parameter estimation of the to-be-estimated parameter theta through an identification algorithm so as to obtain an estimated value of the to-be-estimated parameter theta; obtaining an estimated value of a Thevenin model parameter based on the estimated value of the to-be-estimated parameter theta; and estimating a batterystate based on the estimated value of the Thevenin model parameter. The device comprises an establishment module, a determination module, a formula module, a calculation module, an identification module, a first estimation module and a second estimation module. The method is advantaged in that the Thevenin model parameters can be quickly identified.

Description

【Technical field】 [0001] The invention relates to the technical field of battery detection, in particular to a battery model parameter estimation method and device. 【Background technique】 [0002] The emergence of batteries has greatly promoted the development of society, and has penetrated into all aspects of life, such as mobile phones, tablet computers, handheld devices, etc. How to reasonably, effectively, and maximize the performance of the battery depends on accurately obtaining the state parameters of the battery. The accurate acquisition of state parameters is based on the accurate identification of battery model parameters. The most commonly used method for measuring the open-circuit voltage (open-circuit voltage, OCV) is to fully stand the battery under the condition of no current, and the standing time is usually not less than 30 minutes. The measurement of ohmic internal resistance needs to be obtained according to the change of current and voltage. The polari...

Claims

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Application Information

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IPC IPC(8): G01R31/367
CPCG01R31/367
Inventor 孙力林鹏金鹏
Owner NORTH CHINA UNIVERSITY OF TECHNOLOGY