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Battery control method based on ageing-adaptive operation window

A battery charging and battery technology, applied in secondary battery charging/discharging, secondary battery, secondary battery repair/maintenance, etc., can solve the problem of poor detection reproducibility, time-consuming charge and discharge preparation time, long detection time, etc. question

Active Publication Date: 2016-05-18
IND TECH RES INST
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Problems solved by technology

[0005] In the above-mentioned and current battery aging research technologies, there are still shortcomings in the implementation of detection.
For example, the current electrochemical impedance spectroscopy (EIS) detection is facing shortcomings in the implementation of the detection, the main reasons include (1) long detection time: it takes a lot of charge and discharge preparation to measure the EIS in each capacity state of the battery (2) The reproducibility of the detection is not good: because the measurement wiring needs to be reconnected, the measurement accuracy caused by the contact impedance will be compromised

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[0041] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0042] figure 1 According to an embodiment of the present invention, a battery control method for adjusting the battery operating range based on aging is described. Please refer to figure 1 , the battery control method implements a multi-dimensional electrochemical impedance spectroscopy (Multi-Dimensional Electrochemical Impedance Spectrum, MD-EIS) detection method to obtain a Nyquist relative to a charge state (Nyquistvs.State-of-Charge (SoC)) a three-dimensional relationship diagram (step 110); then analyze the three-dimensional relationship diagram of the Nyquist relative to the charging state with an equivalent circuit model (EquivalentCircuitModel, ECM) to obtain at least one main aging factor (step 120); and Defi...

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Abstract

A battery control method based on ageing-adaptive operation window is provided, including: performing a multi-dimensional electrochemical impedance spectrum method to obtain a three-dimensional Nyquist-vs-SoC relation diagram; using an equivalent circuit model to analyze the Nyquist-vs-SoC diagram to obtain at least a major ageing factor; defining an operation window stress index, and based on the stress index defining a plurality of control reference points for the battery operation window; and based on the plurality of control points, performing the control of battery discharging.

Description

technical field [0001] The present invention mainly provides a battery control method related to an aging-adaptive operation window (Ageing-adaptive Operation Window, AOW). Background technique [0002] The discharge characteristics of the battery will change with long-term use, which is generally called the aging phenomenon of the battery; the aging phenomenon of the battery includes the decline of capacity and the reduction of efficiency. The traditional battery detection method must fully charge and discharge the battery to measure the actual capacity. Generally speaking, the detection time will be as long as 1 (1C) to 10 (0.1C) hours. For the user, it will take a long time to return the battery to the factory for repair, which is unacceptable. Therefore, in order to enhance the identification of the health state of the battery, use the battery under normal and safe operating parameters, thereby prolonging the service life and increasing the safety, the industry and the...

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Application Information

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IPC IPC(8): G01R31/36
CPCH01M10/44H01M10/48G01R31/367G01R31/389G01R31/392Y02E60/10
Inventor 凌守弘梁世豪
Owner IND TECH RES INST
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