Battery state of charge tracking, equivalent circuit selection and benchmarking

A state of charge and equivalent circuit model technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve problems such as battery charge state estimation

Inactive Publication Date: 2014-08-27
FAIRCHILD SEMICON SUZHOU +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Accurate estimation of, for example, the state of charge of a battery can be difficult using known systems and methods

Method used

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  • Battery state of charge tracking, equivalent circuit selection and benchmarking
  • Battery state of charge tracking, equivalent circuit selection and benchmarking
  • Battery state of charge tracking, equivalent circuit selection and benchmarking

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Embodiment Construction

[0031] Although the exemplary embodiments may include various modifications and alternative forms, embodiments thereof are shown by way of example in the drawings and will be described in detail herein. It should be understood, however, that there is no intent to limit example embodiments to the particular forms disclosed, but on the contrary, example embodiments are to cover all modifications, equivalents, and alternatives falling within the scope of the claims. Like numbers refer to like elements throughout the description of the figures.

[0032] Accurate estimation of battery states such as state of charge (SOC), state of health (SOH) and remaining useful life (RUL) is critical for reliable, safe and widespread use of battery-powered devices. Estimating these quantities is called battery fuel gauge (BFG). Unlike the hydrocarbon fuels in many of today's cars, the storage capacity of batteries is not constant. Typically, battery capacity varies with battery age, usage patt...

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Abstract

A method includes calculating a first estimated state of charge (SOC) of a battery at a first time, receiving a voltage value representing a measured voltage across the battery at a second time, calculating a filter gain at the second time, and calculating a second estimated SOC of the battery at the second time based on the first estimated SOC, the voltage value, and the filter gain. Another method includes storing, in a memory, a library of equivalent circuit models representing a battery, determining an operational mode of a battery based on a load associated with the battery, selecting one of the equivalent circuit models based on the determined operational mode, and calculating a state of charge of charge (SOC) of the battery using the selected equivalent circuit model.

Description

technical field [0001] Embodiments relate to calculating the state of charge of a battery. Background technique [0002] Electrochemical energy storage devices play an important role in future energy strategies. In fact, batteries are a viable energy storage technology for the present and the near future. A wide variety of devices such as portable electronic devices, mobile home appliances, aerospace equipment, etc. are increasingly powered by batteries. Accurate estimation of, for example, the state of charge of a battery can be difficult using known systems and methods. Accordingly, there is a need for systems, methods and apparatus that address the deficiencies of current technology and provide other new and innovative features. Contents of the invention [0003] One embodiment includes a method. The method includes calculating a first estimated state of charge (SOC) of the battery at a first time, receiving a voltage value representative of a measured voltage acros...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36
Inventor B·巴乐兴艾姆Y·巴-莎伦B·弗伦奇B·派迪派缇K·R·派迪派缇詹姆斯·米查姆特莱维斯·威廉斯G·V·艾沃瑞黄泰植
Owner FAIRCHILD SEMICON SUZHOU
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