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Method for estimating battery degradation

A battery and battery temperature technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., to reduce the complexity of the system and reduce the cost of hardware

Active Publication Date: 2013-06-26
KYMCO
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above method must interrupt the charging behavior of the battery in order to measure the aging of the battery

Method used

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  • Method for estimating battery degradation
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  • Method for estimating battery degradation

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Embodiment Construction

[0042] During the charging process of the battery, the time point when the constant current turns to the constant voltage is a relatively stable operating point in the charging environment. Therefore, the present invention mainly utilizes relevant parameters in the process of constant current conversion to constant voltage during the charging process to evaluate the deterioration of the battery. Therefore, the present invention can estimate the deterioration of the battery without any additional circuit and without interrupting the charging behavior of the battery. The battery aging estimation method of the present invention will be illustrated below, but it is not intended to limit the present invention. Those skilled in the art can slightly modify the following embodiments according to the spirit of the present invention, but they still belong to the scope of the present invention. .

[0043] figure 1 It is a flowchart of a method for estimating battery aging according to ...

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Abstract

A method for estimating battery degradation is provided. In this method, a remaining capacity is obtained by looking up a device characteristic table according to a steady open circuit voltage of a battery. Besides, a constant current is provided to charge the battery, and when a terminal voltage of the battery reaches to a charging preset voltage, a constant voltage is provided to charge the battery. The transition point information at the transition from a constant current mode to a constant voltage mode, which includes a transition point estimated open circuit voltage, a transition point voltage, a transition point current and a transition point battery temperature, is analyzed based on voltage, current, temperature and capacity information measured during the charging process. A battery degradation index is calculated from the transition point information.

Description

technical field [0001] The present invention relates to a method for estimating battery aging, and in particular relates to a method for estimating battery aging by utilizing relevant parameters of constant current to constant voltage operation during charging. Background technique [0002] When the battery is in use, it will gradually crack due to factors such as environmental changes and the number of charge and discharge cycles. Therefore, during the deterioration process of the battery, different metering tools are usually used to measure these aging parameters of the battery to determine whether the battery is still suitable for use in the system. [0003] For the measurement of battery aging parameters, some known technologies have been proposed successively, such as US Patent No. 2011 / 133744, US Patent No. 6,832,171, US Patent No. 6,433,513, and Japanese Patent Laid-Open No. 2007-178333. Among them, US Patent No. 2011 / 133744 utilizes an interference source to detect ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36
CPCG01R31/392
Inventor 周崇仁孙建中刘秋昱许盈晧杜衍辉凌守弘
Owner KYMCO
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