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Battery state of charge detection method

A battery state-of-charge and state-of-charge technology, which is applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problems of large measurement errors and inaccurate measurement results, and achieve the effect of small errors and simplified modeling process

Active Publication Date: 2012-02-15
SUZHOU ETRON TECH CO LTD
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  • Description
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Problems solved by technology

[0008] The purpose of the present invention is to provide a method for detecting the state of charge of a battery, which solves the problems of large measurement errors and inaccurate measurement results in the battery SOC measurement method in the prior art.

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Embodiment Construction

[0039] In order to describe the technical solution of the above-mentioned invention in more detail, the following inventors list specific examples to illustrate the technical effects; it should be emphasized that these examples are used to illustrate the present invention and not limit the scope of the present invention.

[0040] Example Figure 1-5 , which is a state of charge detection method for lithium batteries, specifically, is divided into the following steps:

[0041] (1) Measure the open-circuit voltage of the battery in a static state to determine the state of charge value of the battery in a static state; collect the voltage and state of charge values ​​of the battery at different temperatures and the voltage and state of charge values ​​​​under different cycle charge and discharge times The voltage-state-of-charge curve is fitted separately; the initial state-of-charge value of the battery is obtained by collecting data at different temperatures, data at different cy...

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Abstract

The invention discloses a method for detecting the state of charge of a battery. On the basis of the ampere-hour measurement method, the voltage-state-of-charge curves at different temperatures and different cycle charge and discharge times are stored in a memory chip to normalize A method of calibrating the battery state of charge value SOC obtained from the battery charge and discharge normalization curve after the chemical treatment. The error of this method is small, and it is suitable for both the static state of the battery and the working state of the battery; moreover, this method can use mathematical fitting tools to establish correlation curves, simplify the modeling process, and be easy to use this method in practice.

Description

technical field [0001] The invention relates to a charge state detection method of an electrochemical battery, and belongs to the field of battery measurement method design. Background technique [0002] The electronic circuits of notebooks, mobile communication tools, and electric / hybrid vehicles can be powered by batteries, which are generally electrochemical batteries, including lithium batteries, nickel-metal hydride batteries, nickel-cadmium batteries, etc. The circuit can charge the battery so that the rechargeable battery can continue to be used. In this way, the user needs to know the power usage of the battery, so that the user can use it conveniently and decide the charging time. [0003] The state of charge (SOC) of the battery is the state of charge of the battery in the current state, generally a part of the maximum charge of the battery. The SOC of the battery state of charge can reflect the situation of the battery relative to the maximum charge when the bat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/36
Inventor 丁屹李乐庆唐玲
Owner SUZHOU ETRON TECH CO LTD
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