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Samsung SDI Co Ltd : Researchers Submit Patent Application, "Battery Pack Having Linear Voltage Profile, and Soc Algorithm Applying to the Battery Pack", for Approval

01/08/2014 | 11:31pm US/Eastern
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By a News Reporter-Staff News Editor at Journal of Mathematics -- From Washington, D.C., VerticalNews journalists report that a patent application by the inventors JU, Ri-A (Yongin-si, KR); KIM, Hyun (Yongin-si, KR); KIM, Suk-Kyum (Yongin-si, KR); KIM, Seung-Min (Yongin-si, KR), filed on March 14, 2013, was made available online on January 2, 2014.

The patent's assignee is Samsung Sdi Co., Ltd.

News editors obtained the following quote from the background information supplied by the inventors: "Embodiments relate to a battery pack and a state of charge (SOC) algorithm applied to the battery pack.

"In general, a secondary battery is a battery that is rechargeable and dischargeable, unlike a primary battery that may not be recharged. The secondary battery may be used as a single battery or may be used as a battery module that includes a plurality of batteries as a unit, according to a kind of an external device to which the battery is applied."

As a supplement to the background information on this patent application, VerticalNews correspondents also obtained the inventors' summary information for this patent application: "Embodiments are directed to a battery pack, including a rechargeable battery module and a battery management system for controlling charging and/or discharging of the battery module. The battery module may include a substantially linear charging and discharging voltage-time profile within at least part of the charging and discharging cycle of the battery module, and the battery management system may be configured to calculate a state of charge of the battery module by using linear charging and/or discharging characteristics of the battery module.

"The battery management system may be arranged to calculate a second state of charge of the battery module after a time period of charging or discharging by determining a first state of charge of the battery module and then using the linear charging and/or discharging characteristics of the battery module.

"The first state of charge may be a current state of charge of the battery module and the second state of charge may be a predicted state of charge of the battery module, or the first state of charge may be a previous state of charge of the battery module and the second state of charge may be a current state of charge of the battery module.

"The battery management system may be configured to determine the first state of charge of the battery module by measuring an output voltage of the battery module.

"The battery management system may be configured to determine the substantially linear charging and discharging voltage-time profile.

"The battery management system may be configured to determine a charging and discharging voltage-time profile over a sub-range of state of charges, and then use the same to determine the substantially linear voltage-time profile for a wider range of state of charges.

"The battery management system may be configured to use the determined substantially linear charging and discharging voltage-time profile to determine a substantially linear charging and discharging voltage-state of charge profile.

"A charging and discharging voltage-state of charge profile of the battery module may be linear within a range of states of charge from 70% to 90% state of charge.

"The battery module may consist of one or more lithium ion batteries.

"The one or more lithium ion batteries may each include a negative active material, the negative active material including carbon black and soft carbon.

"The negative active material may include a total weight amount of the carbon black and the soft carbon that is made up of about 54.5 to 99.5% of the soft carbon and about 0.5 to 45.5% of the carbon black.

"The negative active material may include about 54.5 to 99.5% of the soft carbon and about 0.5 to 45.5% of the carbon black.

"Embodiments are also directed to a power apparatus for an idle stop and go system for starting an engine, including a battery pack according to an embodiment, a power generating module for charging the battery pack, and a starter motor arranged to be powered by discharge of the battery pack.

"On starting the engine, the battery management system may be configured to determine the substantially linear charging and discharging voltage-time profile and may be arranged to use the determined substantially linear charging and discharging voltage-time profile to determine a substantially linear charging and discharging voltage-state of charge profile. And the battery management system is arranged to determine an engine start voltage value of the battery module based on an elapsed time using the determined substantially linear charging and discharging voltage-time profile, and then using the engine start voltage value and the determined substantially linear charging and discharging voltage-state of charge profile to determine an engine start state of charge value.

BRIEF DESCRIPTION OF THE DRAWINGS

"Features will become apparent to those of skill in the art by describing in detail example embodiments with reference to the attached drawings in which:

"FIG. 1 illustrates a diagram showing a schematic configuration of a battery pack according to an embodiment, and a connecting status to external peripheral devices;

"FIGS. 2A and 2B illustrate graphs of charging/discharging voltage profiles in a general lithium ion battery and charging/discharging voltage profiles of a lithium ion battery according to an embodiment;

"FIG. 3 illustrates a block diagram showing an internal structure of a battery management system (BMS) according to an embodiment for acquiring a state of charge (SOC);

"FIGS. 4A through 4C illustrate diagrams of experimental data and graphs about a lithium ion battery according to an embodiment;

"FIG. 5 illustrates a flow chart illustrating processes of acquiring the SOC by the BMS according to an embodiment; and

"FIG. 6 illustrates a flowchart of processes of acquiring the SOC by using output profiles when the BMS starts an engine according to an embodiment."

For additional information on this patent application, see: JU, Ri-A; KIM, Hyun; KIM, Suk-Kyum; KIM, Seung-Min. Battery Pack Having Linear Voltage Profile, and Soc Algorithm Applying to the Battery Pack. Filed March 14, 2013 and posted January 2, 2014. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=5237&p=105&f=G&l=50&d=PG01&S1=20131226.PD.&OS=PD/20131226&RS=PD/20131226

Keywords for this news article include: Algorithms, Samsung Sdi Co. Ltd.

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC

(c) 2014 Journal of Mathematics via VerticalNews.com

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