Topic
State of charge
About: State of charge is a research topic. Over the lifetime, 12013 publications have been published within this topic receiving 201419 citations. The topic is also known as: SoC & SOC.
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Patent•
30 Apr 1997TL;DR: In this paper, a tester for voltage and state-of-charge determination of a battery is presented. But the tester can be permanently mounted on the battery and employs an electrochromic cell which changes visual appearance, for example, color or intensity of color when electrically connected across the terminals of the battery.
Abstract: A tester for use in determining the voltage and state-of-charge of a battery. The tester can be permanently mounted on the battery and employs an electrochromic cell which changes visual appearance, for example, color or intensity of color when electrically connected across the terminals of a battery. The electrochromic cell undergoes an oxidation/reduction reaction on direct application of the DC potential of the battery. The color of the electrochromic cell can be compared with a color comparison chart to determine the condition of the battery. The tester can be permanently electrically connected to the battery or, preferably, can be connected momentarily to determine the state of the battery.
71 citations
Patent•
12 Mar 1998
TL;DR: In this paper, a method for determining state of charge (SOC) of an electrochemical device using fuzzy logic (i.e., an intelligent system) is presented, where the intelligent system is trained in the relationship between the characteristic of the electrochemical devices and the SOC of the device.
Abstract: A method for determining state of charge, SOC, of an electrochemical device (12) using fuzzy logic (i.e., an intelligent system) is presented. SOC of an electrochemical device is determined by an internal characteristic or parameter (or external operating and environmental conditions) (14) with an intelligent system (16). The electrochemical device (12) comprises such devices as primary ('throwaway') batteries, rechargeable batteries, fuel cells, a hybrid battery containing a fuel cell electrode and electrochemical supercapacitors. The intelligent system (16) is trained in the relationship between the characteristic of the electrochemical device and the SOC of the electrochemical device.
71 citations
TL;DR: In this paper, the effects of different storage technologies on a hybrid renewable energy system composed of photovoltaic, hydrokinetic and diesel generator are analyzed based on indicators such as Net Present Cost, Cost of Energy, unmet load and CO2 emissions.
71 citations
TL;DR: An integrated SoC estimator based on the adaptive extended Kalman filter (EKF) and particle filter (PF) is proposed and accurate and robust SoC estimation results can be obtained by the proposed method.
71 citations
Patent•
16 Apr 2004TL;DR: In this article, a method for calculating the available power of a battery is presented, which includes steps of calculating an equivalent charge resistance at a current charge current, a current SOC (state of charge), and a current battery temperature using predetermined equivalent charge resistances data.
Abstract: A method for calculating available power of a battery includes steps of calculating an equivalent charge resistance at a current charge current, a current SOC (state of charge), and a current battery temperature using predetermined equivalent charge resistance data, calculating an effective no-load charge voltage at the current charge current, the current SOC, and the current battery temperature using predetermined effective no-load charge voltage data, calculating a maximum charge current based on the equivalent charge resistance, the effective no-load charge voltage, and a predetermined maximum charge voltage, and calculating available charge power based on the maximum charge current, the predetermined maximum charge voltage, and a predetermined battery maximum current. A system for executing the method is also disclosed.
71 citations