Online estimation method of SOC, electronic device and storage medium

A battery state of charge, electronic device technology, applied in the direction of measuring devices, measuring electricity, measuring electrical variables, etc., can solve the problems of increased error, inaccurate open-circuit voltage look-up table, etc., and achieve simple and fast operation, small workload, high precision effect

Inactive Publication Date: 2018-08-24
深圳市鹏诚新能源科技有限公司
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Problems solved by technology

Practical SOC estimation methods include: 1) the ampere-hour integration method, which belongs to the open-loop calculation, and the error accumulation will occur in the estimation results, resulting in a gradual increase in the error; 2) the combined method of the ampere-hour integration and the open circuit voltage The relationship with the SOC is used to cali

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  • Online estimation method of SOC, electronic device and storage medium
  • Online estimation method of SOC, electronic device and storage medium
  • Online estimation method of SOC, electronic device and storage medium

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[0049] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0050] It should be noted that the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes, and should not be understood as indicating or implying their relative importance or implicitly indicating the number of indicated technical features . Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one...

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Abstract

The present invention relates to an online estimation method of an SOC (State of Charge), an electronic device and a storage medium. The method comprises the steps of: obtaining a quantitative function relation Uocv(SOCk) of an open-circuit voltage Uocv and an SOCk, obtained based on a pulse charge-discharge experiment, of a battery, and determining an initial parameter value based on a second-order RC equivalent circuit model; establishing a battery model function based on the second-order RC equivalent circuit model, and obtaining a state equation and an observation equation of the SOC and apolarization voltage according to the battery model function, the quantitative function relation Uocv(SOCk) and an SOC defined function; obtaining a state equation and an observation equation of internal parameters of the battery corresponding to the initial parameter value based on the battery model function; and performing SOC online estimation. The online estimation precision of the SOC of thebattery is high in precision and low in workload.

Description

technical field [0001] The invention relates to the technical field of batteries, and in particular to an online estimation method of battery state of charge SOC, an electronic device and a storage medium. Background technique [0002] At present, the battery management system (BMS) is an important tool for managing and controlling batteries during the operation of electric vehicles and other products that require a certain number of batteries. Due to the differences in the use of batteries, the functions of BMS produced by different manufacturers are not completely consistent, but their basic functions should include: monitoring of characteristic parameters during operation, energy control management, real-time status analysis, fault warning and safety protection, Information display and storage, etc. [0003] Among them, the real-time state analysis of the battery includes battery State of Charge (SOC) estimation, State of Health (SOH) estimation, and State of Power (SOP)...

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Application Information

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IPC IPC(8): G01R31/36
CPCG01R31/367
Inventor 康健强谭祖宪王倩倩旷理政
Owner 深圳市鹏诚新能源科技有限公司
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