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Battery management system and SOC estimation method

A battery management system, current integration algorithm technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve problems such as inaccurate estimation, and achieve the effect of simple algorithm, high algorithm accuracy, and less data calculation

Inactive Publication Date: 2018-12-18
梁小红
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the above method, the SOC may not be estimated correctly due to an error in current summation at the end of discharge or a change in current or temperature during discharge

Method used

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  • Battery management system and SOC estimation method

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Embodiment Construction

[0020] Hereinafter, exemplary embodiments according to the present invention will be described in detail with reference to the contents described in the drawings. However, the invention is not limited to the exemplary embodiments. In addition, the same reference symbols shown in the drawings denote components having substantially the same functions.

[0021] Terms including ordinal numbers such as first and second may be used to describe different constituent elements, but the constituent elements are not limited to the terms. The terms are only used to distinguish one constituent element from another constituent element. For example, a first constituent element may be named a second constituent element without departing from the scope of rights of the present invention, and similarly, a second constituent element may also be named a first constituent element. The terms used in the present application are for describing specific examples and are not intended to limit the pre...

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Abstract

The invention discloses a battery management system and an SOC estimation method. The SOC estimation method comprises the following steps: estimating a dynamic SOC value by adopting a current integration algorithm; outputting a corresponding standard SOC value through an experimental data table by using at least one of a charge and discharge current of the battery, a battery voltage, and a batterytemperature as an input value; and when the deviation between the dynamic SOC value and the standard SOC value is greater than a set value, using the standard SOC value to estimate the current residual capacity, otherwise using the dynamic SOC value to estimate the current residual capacity. The SOC estimation method is high in precision, simple in algorithm and small in data computation amount.

Description

technical field [0001] The present application relates to a battery management system and an SOC estimation method for accurately estimating the remaining capacity of the battery. Background technique [0002] In conventional battery management techniques, the relationship between factors such as OCV, discharge voltage, discharge current, internal resistance, and temperature and SOC is generally predetermined, and at least two factors are detected to estimate the SOC corresponding to the detected factors. [0003] In the above method, the SOC may not be correctly estimated due to an error in current summation at the end of discharge or a change in current or temperature during discharge. In order to solve this problem, when the battery cell voltage reaches a preset value, the SOC is usually compensated so that the SOC rapidly increases or decreases at the compensation time point. Contents of the invention [0004] The purpose of the present invention is to provide a batte...

Claims

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Application Information

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IPC IPC(8): G01R31/36
Inventor 梁小红
Owner 梁小红