KR101896270B1 - Method for checking the electronic vehicle’s battery rate of performance maintenance - Google Patents

Abstract

A method for checking a battery performance maintenance rate of an electric vehicle is disclosed. The method comprises: a thermal equilibrium step of thermally equilibrating a battery of an electric vehicle to a specific temperature value; an input step of applying a preset load pulse profile to the battery; a measurement step of measuring a voltage and a current of the battery; a reading step of reading a state of charge (SOC) value of the battery from a battery management system (BMS); and a calculation step of calculating a performance maintenance rate of the battery. In a desirable way, a step of determining a state of the battery by comparing a prewritten output chart. According to the present invention, the efficiency of a battery performance maintenance rate checking test of an electric vehicle is increased to save a resource and a time.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an electric vehicle,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a battery performance maintaining rate checking method for an automobile using electricity, and more particularly, The present invention relates to a method for checking performance retention rate.

One of the biggest problems of modern society, global warming and abnormal climate change, is increasing the demand for transportation companies' CO2 reduction. In addition, automobiles using an internal combustion engine using gasoline or oil as the main fuel have a serious impact on pollution such as air pollution. Therefore, in recent years, efforts have been made to develop automobiles using electricity in order to reduce pollution and CO₂ generation.

BACKGROUND ART An automobile using electricity is an automobile which operates using only electric energy output from a battery and uses a battery in which a plurality of secondary cells capable of charging and discharging are formed as one pack as a main power source Therefore, there is no exhaust gas and noise is very small.

Since the performance of an automobile battery directly affects the overall safety and performance of an automobile using such an electric energy, the charging and discharging voltage and current of each battery cell, module, and pack, and the output of the battery are efficiently It is important to periodically check the performance status of the battery. You should also determine whether you will continue to measure the deterioration of the battery during routine inspections of the vehicle, whether to use it for other purposes or to dispose of it.

However, when checking the performance status of the battery, the battery pack is conveyed through a conveyor belt or the like, and a high-priced measuring instrument is installed separately for each section to increase the equipment cost, manage each measuring instrument, There were problems such as staffing for surveillance, and time required for inspection (about 2 weeks).

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above problems, and an object of the present invention is to provide a low-cost, short-time (0.5-day) inspection standard and inspection method for confirming battery performance of an automobile using electricity.

In order to accomplish the above object, the present invention provides a method for inspecting the battery performance maintenance rate of an automobile using electricity, comprising the steps of: thermally equilibrating a battery of an automobile using an electric power to a specific temperature value; A measurement step of measuring a voltage and a current of the battery, a reading step of reading a state of charge value of the battery from a battery management system (BMS), and a calculation step of calculating a performance retention rate of the battery However,

Preferably, the measuring step further includes a step of measuring an output of the battery.

The measuring and reading step is characterized by using an average of values repeated three times at intervals of 10 minutes.

Further, the battery performance maintenance confirmation and inspection method of an automobile using the electric power may further include a step of determining a degree of deterioration of the battery by comparing with a previously prepared output chart.

According to the present invention, it is possible to confirm the degree of deterioration of an automobile battery using electricity as a performance maintenance rate, reduce resources required for inspection, and drastically reduce the time required.

FIG. 1 is a general flowchart of a method for inspecting battery performance maintenance rate of an automobile using electricity according to an embodiment of the present invention.
FIG. 2 is a current load pulse profile used in a battery performance maintaining rate check test method according to another embodiment of the present invention.
FIG. 3 is a waveform for a voltage output by applying the current profile of FIG. 2 according to another embodiment of the present invention.
FIG. 4 is a waveform for a time definition used in the battery performance maintaining rate checking method according to another embodiment of the present invention.
FIG. 5 is an output chart prepared by a user used in the battery performance maintenance rate confirmation test method according to another embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the drawings. It is to be noted that the same elements among the drawings are denoted by the same reference numerals whenever possible. Further, the description of functions and configurations that may unnecessarily obscure the gist of the present invention will be omitted.

Various modifications may be made to the embodiments described below. It is to be understood that the embodiments described below are not intended to limit the embodiments, but include all modifications, equivalents, and alternatives to them.

The terms used in the examples are used only to illustrate specific embodiments and are not intended to limit the embodiments. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present description, the terms "comprises" or "having" should be understood to not preclude the presence or addition of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification do.

Meanwhile, in the present invention, the terms first and / or second etc. may be used to describe various components, but the components are not limited to the terms. The terms may be referred to as a second element only for the purpose of distinguishing one element from another, for example, to the extent that it does not depart from the scope of the invention in accordance with the concept of the present invention, Similarly, the second component may also be referred to as a first carry element.

Further, since the series of processes provided by the electric / electronic related invention can be seen to occur at a very short time and at the same time, each step according to the present invention may occur sequentially or concurrently, It is not.

FIG. 1 is a general flowchart of a method for inspecting battery performance maintenance rate of an automobile using electricity according to an embodiment of the present invention.

Referring to FIG. 1, a method 100 of inspecting the battery performance maintenance rate of an automobile using electricity includes the steps of (110) thermally balancing the battery to a specific temperature value, inputting a predetermined load pulse profile to the battery A measurement step 130 for measuring the voltage and current of the battery, a reading step 140 for reading the SOC value of the battery from the BMS, and a calculation step 150 for calculating the performance retention rate of the battery.

More specifically, the battery performance maintenance rate confirmation test method 100 of an automobile using the electricity may further include a step of comparing the comparison with the preliminarily prepared output short circuit table 500 and determining the degree of deterioration of the battery as a performance maintenance rate . On the other hand, the step of comparing / comparing with the prepared output chart 500 is performed by comparing and comparing the SOC (State Of Charge) value or the performance maintenance rate, etc., , Status, and so on.

On the other hand, the step 110 of thermally equilibrating the battery to a specific temperature value does not refer to a specific specific value, but may be understood to include a value of preferably not less than 15 ° C and not more than 25 ° C.

In addition, in an input step 120 of applying a predetermined load pulse profile to the battery, the load pulse profile applies the current profile 200 of FIG. 2, where the voltage will be observed in the form of FIG. More specifically, each current and voltage profile uses a profile agreed with the applicant or the manufacturer, and the proposed profile 200,300 is used as an embodiment according to the present invention, and is not limited to a specific profile.

Meanwhile, the step of measuring the voltage and current of the battery is measured by inputting the profiles 200 and 300 shown above. Preferably, the average value of the measured values repeated three times at intervals of 10 minutes is used to reduce the error range to be measured . The limit of measurement tolerance is ± 0.1% for voltage and current. Also, under the measurement equipment and load application conditions, the voltmeter used for the voltage measurement shall have a resistance of at least 1 MΩ / V, and the ammeter and shunt used for the current measurement shall have a precision of more than 0.5 grade. The measuring step may further include calculating the output of the battery using the measured current and voltage.

In the reading step 140 of reading the SOC value of the battery from the BMS, the BMS includes an SOC (State Of Charge) operation unit for a battery pack consisting of one or more modules or cells, an output unit, A storage unit for storing voltage, current, and temperature data measured in the battery pack, and a control unit.

의 공식에 따른다. 더욱 상세하게는 SOC연산부의 산출 공식에서 방전용량은 표준전류에 의한 100%방전용량에 따른다. 한편, 출력부는 상기 SOC연산부에서 측정된 SOC값을 출력한다. 여기서 SOC값은 바람직하게는 %단위를 의미하며 출력되는 일예로는 사용자가 작성하여 SOC값의 구간을 나눈 표에 출력될 수 있으며 특정한 양식 등에 한정되는 것은 아닐 것이다. 저장부는 배터리의 전압, 전류 및 온도 데이터 등을 저장한다. 다만, 여기서 “저장”이라는 표현에 한정되는 것은 아니며 이와 비슷한 “기록” “송·수신”등의 해당분야의 통상의 기술지식을 가진 자에게 자명한 것을 포함한다. 한편, 데이터를 받는 소프트웨어는 컴퓨터 프로그램(Computer Program), 코드(Code), 명령(Instruction), 또는 이들 중 하나의 조합을 포함할 수 있으며, 이를 저장하는 것은 어떤 유형의 기계, 구성요소(Component), 물리적 장치, 가상장치(Virtual equipment), 컴퓨터 저장매치 또는 장치, 또는 전송되는 신호파(Signal wave)에 영구적 또는 일시적으로 구체화(Embody) 될수 있다. 상기 실시예에 따른 방법은 다양한 컴퓨터 수단을 통하여 구현되며 저장될 수 있다. 상기 저장부에 저장되기 위해 사용되는 것은 본 발명의 실시예를 위하여 특별히 설계되고 구성된 것들이거나 컴퓨터 소프트웨어 기술 분야의 통상의 지식을 가진 자에게 공지되어 사용 가능한 것일 수도 있다. 따라서 이러한 저장매체로서, 하드 디스크, 플로피 디스크 및 자기 테이프와 같은 자기 매체(Magnetic media), CD-ROM, DVD와 같은 광기록 매체(Optical media), 및 롬(ROM), 램(RAM), 플래시 메모리 등과 같이 특별히 구성된 하드웨어 장치가 포함된다. 또한, 제어부는 상기 저장부에 저장된 배터리의 전압, 전류 및 온도 데이터를 이용하여 BMS(배터리관리시스템)를 효율적으로 제어한다. 여기서 제어부의 데이터를 이용하는 것은 어느 특정 실시예로 한정되는 것은 아니며 제어부로부터 데이터를 특정 선(Line)을 통해 수집·이용하는 방법 또는 제어부로부터 신호파(Signal wave)를 통하여 수집·이용하는 방법 등을 포함하며 또는 이들의 조합을 포함한다. 한편, 제어부에 저장된 데이터를 이용하는 것으로서, 제어부에 저장된 데이터를 출력하는 기능, 배터리의 충전 허용범위를 넘어서거나, 배터리 내부의 허용온도를 넘어선 경우 경고신호를 생성하여 출력하는 기능 등을 포함한다. 다만 상기한 실시예에 한정될 것은 아니며 해당 분야의 통상의 기술자로부터 자명한 사항을 포함할 것이다.More specifically, the battery provides electrical energy for supplying electric power to an automobile using electricity, and it may be composed of at least one battery cell or module that stores chemical energy converted into electrical energy. If there is more than one battery cell or module, the battery cell or modules may be connected in series or in parallel. Also, the SOC operation unit is estimated by all known methods such as a chemical measuring method, a voltage measuring method, a current integration method, and the like, and is not limited to any one of them. The SOC calculation unit

. More specifically, the discharging capacity in the calculation formula of the SOC calculating section depends on the 100% discharge capacity by the standard current. Meanwhile, the output unit outputs the SOC value measured by the SOC calculating unit. Here, the SOC value is preferably expressed in units of%, and in an output example, the SOC value may be output to a table that is created by the user and divided by the interval of the SOC value, and may not be limited to a particular style or the like. The storage unit stores voltage, current, and temperature data of the battery. It should be noted, however, that the present invention is not limited to the expression " storing " and includes things obvious to those skilled in the art such as " recording " On the other hand, the software receiving the data may include a computer program, a code, an instruction, or a combination of any of these, and storing it may be performed by any type of machine, , A physical device, a virtual device, a computer storage match or device, or a signal wave to be transmitted. The method according to the embodiment can be implemented and stored through various computer means. Those used for storing in the storage unit may be those specifically designed and configured for the embodiments of the present invention or may be those known to those skilled in the art of computer software technology. As such a storage medium, there are a magnetic medium such as a hard disk, a floppy disk and a magnetic tape, an optical medium such as a CD-ROM and a DVD, and a medium such as a ROM, a RAM, Memory, and the like. In addition, the control unit controls the BMS (battery management system) efficiently using the voltage, current, and temperature data of the battery stored in the storage unit. Here, the use of the data of the control unit is not limited to any particular embodiment, and includes a method of collecting and using data from a control unit through a specific line, a method of collecting and using data from a control unit through a signal wave, Or a combination thereof. A function of outputting data stored in the control unit, a function of outputting a warning signal when the temperature exceeds a permissible temperature range of the battery, or a warning signal when the temperature exceeds a permissible temperature inside the battery. However, the present invention is not limited to the above-described embodiments, but may include matters obvious to those skilled in the art.

의 수식으로 계산될 수 있으며, 여기서 공칭출력(nominal power)은 제조자가 배터리 출하 시 표기하는 초기의 출력을 의미한다. 또한, 측정출력이란 어느 정도 열화가 일어난 후 측정하는 출력으로써 ‘W’(watt)단위로 정의된다. 상기 측정출력의 열화 정도를 측정하는 방법으로 본 발명의 실시예 외에 통상의 기술자로부터 자명하다고 생각되는 실시예들을 포함하는 것으로 이해할 수 있을 것이다. 한편, 측정 시 측정 허용 오차는 바람직하게는 시간의 경우 ± 0.1%, 온도의 경우 ± 2℃와 같다. On the other hand, in the calculation step 150 for calculating the performance maintenance ratio of the battery,

Where nominal power refers to the initial output the manufacturer has labeled at the time of the battery shipment. In addition, the measurement output is an output measured after a certain deterioration, and is defined in units of 'W' (watt). It should be understood that the present invention includes embodiments in which the degree of deterioration of the measurement output is measured by the method of the present invention. On the other hand, the measurement tolerance at the time of measurement is preferably equal to ± 0.1% for time and ± 2 ° C for temperature.

및

을 따르며, 이 경우

는 방전 시 최소 전압,

는 충전 시 최대 전압이다. 또한,

및

에서 구할 수 있다. 한편, 상기 측정 출력 계산에서 사용되는

,

,

,

The measurement output calculation

And

In this case,

Is the minimum voltage at discharge,

Is the maximum voltage during charging. Also,

And

. On the other hand,

,

,

,

0.0 > 400 < / RTI > for the time definition in FIG.

FIG. 2 is a current load pulse profile used in a battery performance maintaining rate check test method according to another embodiment of the present invention.

Referring to FIG. 2, the current load pulse profile used in one embodiment of the present invention is shown in " KS C ISO 12405-1, Lithium secondary battery pack for electric vehicles / System evaluation - Part 1: .2 pulse charge / discharge profile " In the table, the Y-axis of the waveform shown in the current waveform represents the current (C rate) and therefore discharges to 20 C initially.

FIG. 3 is a waveform for a voltage output by applying the current profile of FIG. 2 according to another embodiment of the present invention.

Referring to FIG. 3, the profile used in one embodiment of the present invention is shown in "KS C ISO 12405-1, Lithium secondary battery pack / system evaluation for electric vehicles - Part 1: 7.3.2 pulses of" Charge and discharge profiles "were applied.

,

,

,

에 대한 파형이다.FIG. 4 is a waveform diagram of a time definition used in the battery performance maintaining ratio checking method according to another embodiment of the present invention. In the calculation of the performance maintaining ratio,

,

,

,

≪ / RTI >

FIG. 5 is an output chart prepared by a user used in the battery performance maintenance rate confirmation test method according to another embodiment of the present invention.

Referring to FIG. 5, the output chart prepared by the user may preferably be the output chart 500 of FIG. It should be understood, however, that the above-mentioned output chart is merely an example, and that variations in an equivalent range for the convenience of the user can be made by a person skilled in the art. When outputting the SOC value calculated by the SOC operation unit in the output unit of the BMS to a table in which the interval of the SOC value is divided by the unit of%, it may be output in the same format as the output unit of the BMS.

Although the present invention has been described in connection with certain preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

100: The overall process of checking the battery performance maintenance rate
110: thermal equilibrium step 120: input step
130: measuring step 140: reading step
150: calculation step
200: Load pulse profile for current
300: a waveform for a voltage outputted by applying a current profile 200
400: waveform for time definition
500: output chart

Claims (4)

Thermally equilibrating a battery of an automobile using electricity to a specific temperature value;
An input step of applying a predetermined load pulse profile to the battery;
Measuring a voltage and a current of the battery;
A reading step of reading a SOC (State Of Charge) value of the battery from a BMS (Battery Management System);
A calculation step of calculating a performance maintenance rate of the battery, and
A comparison step of performing a comparison comparison with a preliminarily prepared output chart based on the SOC (State Of Charge) value or the performance retention rate,
And the degree of deterioration of the battery can be confirmed as a performance retention ratio How to check battery performance maintenance rate of automobile using electricity.
The method according to claim 1,
Wherein the measuring step measures the voltage and current of the battery and further measures the output of the battery using the measured voltage and current of the battery.
2. The method of claim 1,
And an average of values repeated three times at intervals of 10 minutes is used.
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