Battery parameter online identification method, device and computer readable storage medium

A technology of battery parameters and identification methods, which is applied in the direction of measuring devices, secondary battery testing, and secondary battery repair/maintenance, etc., and can solve the problems of high computing power requirements, low parameter estimation accuracy, and large data storage capacity of the battery management system. problems, to achieve the effect of enhancing versatility, reducing complexity, and improving accuracy

Active Publication Date: 2021-04-02
DONGGUAN POWERWISE TECH CO LTD
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Problems solved by technology

Because the parameter identification equation of the traditional online estimation method does not describe the battery characteristics finely enough, the parameter estimation accuracy is often relatively low, and the input of parameter identification is large, the algorithm is often complicated, and the data storage is large, which affects the computing power of the battery management system. more demanding

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  • Battery parameter online identification method, device and computer readable storage medium
  • Battery parameter online identification method, device and computer readable storage medium
  • Battery parameter online identification method, device and computer readable storage medium

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Embodiment Construction

[0049] The technical solutions of the present invention will be further described below through specific embodiments, but this does not constitute any limitation to the present invention.

[0050] see figure 1 , the invention discloses a battery parameter online identification method, comprising:

[0051] 101. Obtain the first battery parameter identification equation, and the first battery parameter identification equation is obtained by adding Equation 1 of the battery state equation to After discretization and approximate calculation, it is related to the equation 2 of the battery state equation Ut=U OCV -Ro*It-Up combined to get, where, I t is the load current of the battery; Up is the polarization voltage; Rp is the polarization internal resistance; Cp is the polarization capacitance; U t is the terminal voltage of the battery; Uocv is the open circuit voltage of the battery; Ro is the ohmic internal resistance; obtain the second battery parameter identification equat...

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Abstract

The invention provides an online battery parameter identification method and device, and a computer readable storage medium. The method comprises: acquiring a first battery parameter identification equation that is obtained by carrying out discretization on an equation I of a battery state equation, carrying out approximate calculation, and then combining an equation II Ut=UOCV-Ro*It-Up of the battery state equation; acquiring a second battery parameter identification equation that is obtained by carrying out discretization on the equation I of the battery state equation and then combining theequation II of the battery state equation; constructing a first optimization algorithm system and a second optimization algorithm system that correspond to the first battery parameter identificationequation and the second battery parameter identification equation respectively; inputting corresponding voltage information and current information collected in real time into the first optimization algorithm system and the second optimization algorithm system in real time and identifying corresponding coefficients of the first battery parameter identification equation and the second battery parameter identification equation in an online manner by using the first optimization algorithm system and the second optimization algorithm system; and then acquiring various parameters of the battery according to the corresponding coefficients of the first battery parameter identification equation and the second battery parameter identification equation.

Description

technical field [0001] The present invention relates to the technical field of battery parameter estimation, in particular to a battery parameter online identification method, device and computer-readable storage medium. Background technique [0002] In the field of battery management technology, in order to achieve accurate battery management, various battery state estimations are often required, including battery remaining capacity estimation (SOC), battery state of health estimation (SOH), battery state of power estimation (SOP) and battery energy state estimation (SOE), etc., and the estimation of these states often needs to obtain real-time key parameters of the battery. At this stage, the methods of battery parameter estimation mainly include offline testing method and online estimation method. [0003] The off-line test method is to use specific test equipment to load the battery with specific charging and discharging conditions, and analyze and process the relevant ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/367H01M10/42
CPCH01M10/4285Y02E60/10
Inventor 郑庆飞谢卿
Owner DONGGUAN POWERWISE TECH CO LTD
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