Battery charge state detection method

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

Active Publication Date: 2009-05-13
SUZHOU ETRON TECH CO LTD
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  • Abstract
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  • Claims
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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 t

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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 c...

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Abstract

The invention discloses a battery charge state detection method. The method is characterized by normalizing voltage-charge state curves with different temperatures and different cycle charging and discharging times which are stored in a memory chip to obtain a battery charge state value SOC of a battery charging and discharging normalization curve for calibration based on an ampere-hour measurement method. The method has little error, and is applicable to static state of the battery as well as working state of the battery, In addition, correlation curves can be established by a logistic fitting tool, which simplifies the modeling process and facilitates application of the method.

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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IPC IPC(8): G01R31/36
Inventor 丁屹李乐庆唐玲
Owner SUZHOU ETRON TECH CO LTD
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