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Estimation of battery state-of-charge and calorific value based on gassing phenomenon

A state of charge and calorific value technology, applied in the measurement of electrical variables, measurement of electricity, measurement devices, etc., can solve the problems that it is difficult to describe the characteristics of lithium batteries and rarely consider gas evolution.

Inactive Publication Date: 2020-05-05
SAIC GENERAL MOTORS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The battery models mentioned above seldom consider the influence of gas evolution on SOC and other state variables, so it is difficult to describe the characteristics of lithium batteries in critical conditions

Method used

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  • Estimation of battery state-of-charge and calorific value based on gassing phenomenon
  • Estimation of battery state-of-charge and calorific value based on gassing phenomenon
  • Estimation of battery state-of-charge and calorific value based on gassing phenomenon

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Embodiment Construction

[0055] The method for estimating the state of charge of the battery and the method for estimating the calorific value of the gassing phenomenon, the computer equipment and the recording medium involved in the present invention will be further described in detail below in conjunction with the accompanying drawings. It should be noted that the following specific embodiments are illustrative rather than limiting, and are intended to provide a basic understanding of the present invention, but are not intended to identify key or decisive elements of the present invention or limit the scope of protection.

[0056] Notwithstanding that numerical ranges and parameters setting forth the broad scope of the invention are suitable, the numerical values ​​set forth in the specific examples are reported as precisely as possible. Any numerical value, however, inherently contains certain errors necessarily resulting from the standard deviation found in their respective testing measurements. M...

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Abstract

The invention relates to a battery state-of-charge estimation method based on a gassing phenomenon, a calorific value estimation method, a computer device, and a recording medium. The battery state-of-charge estimation method based on the gassing phenomenon comprises the following steps: obtaining a gassing coefficient eta; and based on the obtained gassing coefficient eta, calculating the SOC value of the battery by utilizing an SOC dynamic equation. The SOC state and the calorific value of the battery can be accurately calculated.

Description

technical field [0001] The present invention relates to the technical field of battery state detection, and more specifically, to the estimation of the state of charge of the battery and the calorific value. Background technique [0002] The SOC of the battery is defined as the ratio of the remaining capacity of the battery after it has been used for a period of time or left unused for a long time to the capacity of the fully charged state, which reveals the current remaining capacity of the battery. SOC is often expressed as a percentage, and its value ranges from 0 to 1. Various battery models (such as electrochemical models, neural network models, AC impedance models, RC equivalent circuit models, etc.) that have been established at present are difficult to accurately estimate the SOC and calorific value of lithium batteries in a critical state. Therefore, improved battery state-of-charge estimation methods are urgently needed. [0003] With the development of the new e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/367G01R31/385
Inventor 胡江棣
Owner SAIC GENERAL MOTORS