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Apparatus and method for testing state of charge in battery

a technology of state of charge and apparatus, which is applied in the direction of battery/fuel cell control arrangement, instruments, electric devices, etc., can solve the problems that the conventional methods for estimating the soc of the battery in these products have difficulty in estimating the soc of the battery in these products, and achieve the effect of accurate estimating the soc of the battery and a high c-rate environmen

Inactive Publication Date: 2007-01-04
LG CHEM LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Benefits of technology

[0010] It is an objective of the present invention to provide an apparatus and method for estimating a state of charge (SOC) in a battery, in which the battery SOC is estimated using a fusion type soft computing algorithm, thereby accurately estimating the battery SOC in a high C-rate environment.

Problems solved by technology

Hence, the conventional methods for estimating the battery SOC have difficulty in estimating the battery SOC in these products.

Method used

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  • Apparatus and method for testing state of charge in battery
  • Apparatus and method for testing state of charge in battery
  • Apparatus and method for testing state of charge in battery

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Embodiment Construction

[0016] Reference will now be made in detail to the exemplary embodiments of the present invention.

[0017]FIG. 1 is a block diagram of an apparatus for estimating a state of charge (SOC) in a battery in accordance with an embodiment of the present invention. Referring to FIG. 1, the SOC estimation apparatus is comprised of a battery cell 10, a detector unit 11, a soft computing unit 20, a charger-discharger 30, and a comparator 40.

[0018] The detector unit 11 includes a current detector 12, a voltage detector 14, and a temperature detector 16. The current detector 12 detects current i from the battery cell 10 at a point of time k. The voltage detector 14 detects voltage v from the battery cell 10 at a point of time k. The temperature detector 16 detects temperature T from the battery cell 10 at a point of time k.

[0019] Soft computing is generically called a function approximator made by engineeringly modeling brain information transfer, reasoning, learning, genetic, and immune syste...

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Abstract

Disclosed is an apparatus and method for estimating a state of charge (SOC) in a battery, in which the battery SOC is estimated using a fusion type soft computing algorithm, thereby accurately estimating the battery SOC in a high C-rate environment. The apparatus includes a detector unit for detecting current, voltage and temperature of a battery cell; and soft computing unit for outputting a battery SOC estimation value of processing the current, the voltage and the temperature detected by the detector unit using a radial function based on a neural network algorithm. Especially, the soft computing unit combines the neural network algorithm with any one of a fuzzy algorithm, a genetic algorithm (GA), a cellular automata (CA) algorithm, an immune system algorithm, and a rough-set algorithm, and thereby adaptively updates the parameters of the neural network algorithm.

Description

[0001] This application claims the benefit of the filing date of Korean Patent Application No. 2005-50273, filed on Jun. 13, 2005, in the Korean Intellectual Property Office, the disclosure of which is incorporated herein in its entirety by reference. TECHNICAL FIELD [0002] The present invention relates to an apparatus and method for estimating a state of charge (SOC) in a battery, and more particularly to an apparatus and method for estimating an SOC in a battery, using fusion type soft computing. BACKGROUND ART [0003] In general, a state of charge (SOC) in a battery has a nonlinear characteristic. Hence, it is difficult to accurately detect the battery SOC in practice. As a result, the detection of the battery SOC depends on its estimation method. [0004] Examples of a conventional estimation method of the battery SOC include an amp-hour (Ah) counting method, an open circuit voltage (OCV) measuring method, a battery impedance measuring method, and so on. [0005] The Ah counting meth...

Claims

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Application Information

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IPC IPC(8): G01R21/06
CPCB60L3/0046Y02T10/7061B60L11/1864B60L2240/545B60L2240/547B60L2240/549B60L2260/44B60L2260/46B60L2260/48G01R31/3624G01R31/3675Y02T10/7005Y02T10/7011Y02T10/7044B60L11/1861B60L58/12B60L58/21G01R31/367G01R31/374G01R31/3842Y02T10/70G01R31/36
Inventor CHO, ILKIM, DO YOUNJUNG, DO YANG
Owner LG CHEM LTD
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