KR101726374B1 - Method and apparatus for recognizing battery - Google Patents

Method and apparatus for recognizing battery Download PDF

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KR101726374B1
KR101726374B1 KR1020150127515A KR20150127515A KR101726374B1 KR 101726374 B1 KR101726374 B1 KR 101726374B1 KR 1020150127515 A KR1020150127515 A KR 1020150127515A KR 20150127515 A KR20150127515 A KR 20150127515A KR 101726374 B1 KR101726374 B1 KR 101726374B1
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battery
characteristic curve
type
linear
linear section
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KR1020150127515A
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Korean (ko)
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KR20170030231A (en
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이훈
선용석
김진석
문상근
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한전케이디엔주식회사
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Abstract

A battery recognition apparatus and a method thereof are disclosed. The battery recognition apparatus includes a detection unit that detects a characteristic curve using information of the battery provided from a battery management system (BMS) connected to the battery, an extraction unit that extracts a linear section from the characteristic curve, And a determination unit for determining the type of the battery according to the matching result.

Description

[0001] METHOD AND APPARATUS FOR RECOGNIZING BATTERY [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a battery recognition apparatus and a method thereof, and more particularly, to an apparatus and method for recognizing a battery type using a charging or discharging characteristic curve of the battery.

Energy efficiency is an important environmental and economic problem in modern society. In particular, in relation to batteries, a battery management system (BMS) is connected to a battery to improve energy efficiency.

The battery management system (BMS) measures the current, voltage, and temperature of the battery, controls the charging or discharging to use the battery efficiently, includes a safety device to prevent abnormal operation, A state of charge (SOC), and a state of health (SOH).

The battery of such a battery management system basically adopts a lithium iron phosphate battery. In order to improve the energy efficiency, the battery function is improved, and the battery type may need to be changed. At this time, there is a limitation that the battery management system designed on the basis of a single battery can not be used without changing the design and function of the battery management system in future battery replacement.

Japanese Unexamined Patent Application Publication No. 2015-154661 (Charging apparatus and method for different type batteries, 2015.08.24)

In order to solve the above problems, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a battery pack having a linear period of a charging or discharging characteristic curve, And to provide a method and apparatus for recognizing the same.

A battery recognition apparatus according to an embodiment of the present invention includes a detection unit for detecting a characteristic curve using information of the battery provided from a battery management system (BMS) connected to the battery; An extraction unit for extracting a linear section from the characteristic curve; A matching unit for matching the linear region extracted by the extracting unit and the linear region data for each battery type stored in advance; And a determination unit for determining the type of the battery according to the matching result. .

The detecting unit may detect any one of a charging curve and a discharging curve of the battery using information of the battery provided from the battery management system.

The extracting unit may extract a linear section whose coefficient of the characteristic curve is within a first error range.

The extraction unit may set the first error range to be different according to the type of the battery.

The matching unit may set the second error range differently depending on the battery type.

The determination unit may determine the type of the battery according to a result of matching the slope of the linear section extracted by the extracting unit and the previously stored linear type data within the second error range.

The determination unit may determine the type of the battery according to a result of matching the slope of the linear section extracted by the extracting unit and the previously stored linear type data within the second error range.

The determination unit may determine the type of the battery according to a result of matching between the linear region extracted from the charging characteristic curve and the discharge characteristic curve and the linear region data of each battery type.

A method of recognizing a battery according to an embodiment of the present invention includes detecting a characteristic curve using information of the battery provided from a battery management system (BMS) connected to the battery; Extracting a linear section from the characteristic curve; Matching the extracted linear section with previously stored linear section data for each battery type; Determining a type of the battery according to the matching result; .

The detecting step may detect any one of a charging curve and a discharging curve of the battery using information of the battery provided from the battery management system.

And the extracting step may extract a linear section whose coefficient of the characteristic curve is within a first error range.

The determining step may determine the type of the battery according to a result of matching the slope of the extracted linear section and the linear section data for each type of the stored battery within the second error range.

The determining step may determine the type of the battery according to a result of matching the linear section extracted from the charging characteristic curve and the discharge characteristic curve with the linear section data of each battery type stored in advance.

In a battery management system designed on the basis of a single battery, even if the battery is replaced in the future, it is possible to recognize the type of the battery without applying the design and function change of the battery management system.

1 is a configuration diagram of a battery recognition apparatus according to an embodiment of the present invention.
2 is a flowchart of a battery recognition method according to an embodiment of the present invention.
3 is a graph showing a battery discharge characteristic curve according to an embodiment of the present invention.
4 is a graph showing a battery charging characteristic curve according to an embodiment of the present invention.
5 is a graph showing a discharge characteristic curve of a battery having a nonlinear characteristic curve according to an embodiment of the present invention.

The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated and described in the drawings. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

The terms including ordinal, such as second, first, etc., may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the second component may be referred to as a first component, and similarly, the first component may also be referred to as a second component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings, wherein like or corresponding elements are denoted by the same reference numerals, and redundant description thereof will be omitted.

1 is a configuration diagram of a battery recognition apparatus according to an embodiment of the present invention.

Referring to FIG. 1, a battery recognition apparatus 100 according to an embodiment of the present invention includes a detection unit 110, an extraction unit 120, a matching unit 130, and a determination unit 140. The battery recognition apparatus 100 obtains information on the battery 300 from a battery management system (BMS) 200 connected to the battery 300

First, the battery 300 may include a plurality of battery cells (not shown) connected in series and in parallel. The battery cell (not shown) may be a nickel-cadmium battery, a lead-acid battery, a nickel metal hydride battery (NiMH), a lithium ion battery, a lithium- a lithium polymer battery, or the like, which can be charged or discharged. The battery 300 may be referred to as a battery pack or a battery cell. Hereinafter, the battery 300 will be described with reference to a battery cell.

The battery management system 200 senses values of current, voltage, temperature and the like of the battery 300 and stores sensed information and controls charging or discharging of the battery 300 through communication with the outside, ). It also includes a battery stabilization circuit device and the like.

The battery recognition apparatus 100 receives information on the voltage, temperature, and the state of the battery 300 from the battery management system 200. When there is a change in the battery 300, It is possible to provide the battery management system 200 with the type of the battery 300 determined using the characteristic curve inherent to the battery 300. [

The detection unit 110 may detect the characteristic curve of the battery 300 using the battery 300 information provided from the battery management system 200. [ For example, information on the control state from the battery management system 200 and the voltage measured in the charging or discharging state of the battery 300 may be obtained by digital-analog conversion to obtain a voltage curve with respect to time, The charging or discharging characteristic curve of the battery 300 can be detected.

The extraction unit 120 extracts a linear section from the characteristic curve of the battery 300 detected. For example, most batteries have their own linear charging and discharging periods in the charging or discharging state. Accordingly, referring to FIG. 3, the first order equation can be obtained by obtaining the coordinates (T1, y1), (T3, y2), and (T5, y3) for the voltage measured with respect to time. The linear equation calculated when the coordinates are (x1, y1) and (x2, y2) is as shown in the following equation (1).

Figure 112015087621969-pat00001

Equation 1 can be used to obtain a linear equation for time (period A) in T1 and T3 and a linear equation for time period (period B) in T3 and T5. Here, if the two expressions are equal to each other, the A + B section is extracted as a linear section. If the equations are the same even after T5, the linear interval can be extended. Also, this linear section should be continuous. That is, even if the same first order equation is obtained in at least two time intervals that are not sequential but are disconnected, this is not a linear interval.

In addition, the information of the battery provided from the battery management system 200 may not exhibit accurate linearity due to the influence of noise or the like in the signal transmission process. In addition, there is a battery having a non-linear characteristic curve in a charged or discharged state, such as a lithium-polymer battery. Thus, the section having the coefficient of each characteristic curve within the first error range can be extracted as a linear section. For example, referring to FIG. 3, when the coefficient of the characteristic curve of the section A is compared with the coefficient of the characteristic curve of the section B, if the error of the coefficient is within the first error range, the A + B section may be a linear section. Further, the first error range can be set differently depending on the type of the battery. The first error range is set to a narrow range close to 0 in a discharge characteristic curve of a lithium-ion or lithium-iron phosphate which is a battery having a linear characteristic curve, and a wide range is set in a lithium- .

5 showing a discharge characteristic curve of a battery having a nonlinear characteristic curve, the battery having a nonlinear characteristic curve is set in advance for the coefficient of the characteristic curve F, (E section) can be extracted as a linear section. Likewise, the linear section should be continuous.

The matching unit 130 may compare the linear interval extracted by the extracting unit 120 with the linear interval data provided by the battery management system 200 or the battery unit type stored in advance. It is possible to compare and match the slope of the charging interval or the discharge ratio or the slope of the linear section and the slope of the linear section extracted by the extracting unit 120 in the second error range. Like the first error range, the second error range can reflect nonlinearity caused by noise or the like.

The second error range can be set differently depending on the battery type. For example, for a slope of a linear section of a lithium-ion battery or a lithium-iron phosphate battery which is a battery having a linear characteristic curve, a second error range is set to a narrow range close to 0, and a lithium- The gradient of the linear section of the battery can be set in a wide range.

In addition, the slope can be obtained through a differentiator circuit when an analog signal is input, and can also be obtained by calculation using coordinates.

The determination unit 140 determines the type of the battery 300 connected to the battery management system 200 by using the matching result in the matching unit 130. [ Thus, the battery management system 200 designed on the basis of a single battery can recognize the type of the battery without changing the design and function of the battery management system 200 even if the battery 300 is replaced in the future.

In addition, when the type of the battery obtained as the matching result in the charged state of the battery 300 is the same as the type of the battery obtained as a result of the matching in the discharged state, determination of the type of the battery can be determined. Also, the battery has its own linear section, but a plurality of battery types can be matched due to the influence of noise. In such a case, the battery type can be recognized as the battery type having the lowest error.

2 is a flowchart of a battery recognition method according to an embodiment of the present invention. Referring to FIG. 2, a charging or discharging characteristic curve of the battery can be detected using the battery information provided from the battery management system in charging or discharging the battery (S101). If the coefficient of each section is within the first error range in the detected characteristic curve, it can be extracted as a linear section (S102). Here, the linear section can be extracted as a continuous section without being disconnected. The linear interval extracted in step S102 is matched with the data of the linear interval for each battery type previously stored (S103), and the battery type can be determined based on the matching result (S104). The matched data may be a charge ratio or a discharge ratio of the battery, and the second error range may be set differently according to the battery type in consideration of the noise and the nonlinear battery, and the matching may be performed. The determination of the type of the battery can be determined when the type of the battery obtained as the matching result in the charged state of the battery is the same as the type of the battery obtained as the matching result in the discharge state (S105). In addition, it is possible to judge the battery type when the error degree is the lowest.

4 is a graph showing a battery charging characteristic curve according to an embodiment of the present invention. As in the discharge characteristic curve of FIG. 3, the linear section can be extracted by comparing whether the characteristic curves of the sections C and D are the same or the characteristic curves are the same in FIG.

As used in this embodiment, the term " portion " refers to a hardware component such as software or an FPGA (field-programmable gate array) or ASIC, and 'part' performs certain roles. However, 'part' is not meant to be limited to software or hardware. &Quot; to " may be configured to reside on an addressable storage medium and may be configured to play one or more processors. Thus, by way of example, 'parts' may refer to components such as software components, object-oriented software components, class components and task components, and processes, functions, , Subroutines, segments of program code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays, and variables. The functions provided in the components and components may be further combined with a smaller number of components and components or further components and components. In addition, the components and components may be implemented to play back one or more CPUs in a device or a secure multimedia card.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims It can be understood that

100: Battery recognition device 110: Detector
120: extracting unit 130:
140: determination unit 200: battery management system
300: Battery

Claims (12)

A detector for detecting a characteristic curve using information of the battery provided from a battery management system (BMS) connected to the battery;
An extraction unit for extracting a linear section from the characteristic curve;
A matching unit for matching the linear region extracted by the extracting unit and the linear region data for each battery type stored in advance; And
And a determination unit for determining the type of the battery according to the matching result,
Wherein the detecting unit detects a characteristic curve of charging and discharging of the battery,
Wherein the extracting unit extracts coefficients of the characteristic curves of the charging and discharging,
Wherein the matching unit matches the slope of the linear section data for each battery type stored in advance and the coefficient of the characteristic curve of the extracted charge and discharge. The method according to claim 1,
Wherein the detecting unit detects any one of a characteristic curve of charge and discharge of the battery using information of the battery provided from the battery management system. 3. The method according to claim 1 or 2,
Wherein the extraction unit extracts a linear section having the same coefficient of the characteristic curve. delete The method of claim 3,
Wherein the determination unit determines the type of the battery according to whether the slope of the linear section extracted by the extracting unit and the slope of the battery type pre-stored linear section data are the same.
delete 6. The method of claim 5,
Wherein the determination unit determines the type of the battery according to a result of matching the linear interval extracted from the charging characteristic curve and the discharge characteristic curve with the linear interval data stored in advance for each battery type. Detecting a characteristic curve using information of the battery provided from a battery management system (BMS) connected to the battery;
Extracting a linear section from the characteristic curve;
Matching the extracted linear section with previously stored linear section data for each battery type; And
And determining the type of the battery according to the matching result,
Wherein the detecting step detects a characteristic curve of charging and discharging of the battery,
Wherein the extracting step extracts the coefficients of the characteristic curves of the charge and discharge,
Wherein the matching step matches the slope of the linear section for each type of battery and the coefficient of the characteristic curve of the extracted charging and discharging. 9. The method of claim 8,
The detecting step
And detecting a characteristic curve of charging or discharging of the battery using information of the battery provided from the battery management system. 10. The method of claim 9,
The extracting step
And extracting a linear section having the same coefficient of the characteristic curve. 11. The method of claim 10,
The determining step
Wherein the type of the battery is determined based on whether the extracted linear interval and the slope of the linear interval data for each type of the previously stored battery are the same. 12. The method of claim 11,
The determining step
Wherein the type of the battery is determined according to a result of matching between a linear section extracted from the charging characteristic curve and a discharge characteristic curve and linear region data for each battery type stored in advance.
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101362740B1 (en) * 2012-12-20 2014-02-24 현대오트론 주식회사 Method for monitoring of fuel cell stack status
JP2015154661A (en) * 2014-02-18 2015-08-24 株式会社豊田自動織機 Different type battery sharing charging device and method

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DE19804133A1 (en) * 1998-02-03 1999-08-12 Voith Turbo Kg Sickle-free internal gear pump
JP4827443B2 (en) * 2005-06-24 2011-11-30 Ｈｏｙａ株式会社 Battery check device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101362740B1 (en) * 2012-12-20 2014-02-24 현대오트론 주식회사 Method for monitoring of fuel cell stack status
JP2015154661A (en) * 2014-02-18 2015-08-24 株式会社豊田自動織機 Different type battery sharing charging device and method

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