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KR101680324B1 - Apparatus for assessing lifetime of battery - Google Patents

Apparatus for assessing lifetime of battery Download PDF

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Publication number
KR101680324B1
KR101680324B1 KR1020160011088A KR20160011088A KR101680324B1 KR 101680324 B1 KR101680324 B1 KR 101680324B1 KR 1020160011088 A KR1020160011088 A KR 1020160011088A KR 20160011088 A KR20160011088 A KR 20160011088A KR 101680324 B1 KR101680324 B1 KR 101680324B1
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KR
South Korea
Prior art keywords
battery
voltage
internal resistance
charging
life
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KR1020160011088A
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Korean (ko)
Inventor
송기택
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(주)에코파워텍
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Priority to KR1020160011088A priority Critical patent/KR101680324B1/en
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Publication of KR101680324B1 publication Critical patent/KR101680324B1/en

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    • G01R31/3679—
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
    • G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
    • G01R19/16542—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies for batteries
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/08—Measuring resistance by measuring both voltage and current
    • G01R31/3624—
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/46—Accumulators structurally combined with charging apparatus
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
    • H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Secondary Cells (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The present invention relates to a determination device for calculating a remaining life of a battery by calculating an internal resistance of the battery, and more particularly to a determination device for measuring a voltage of an introduced state of a battery to be determined, It is possible to quickly and accurately calculate the internal resistance of the battery. In addition, since the constant current is different when the constant current is charged, And determines the remaining lifetime of the battery, thereby improving the accuracy of the battery.

Description

Apparatus for assessing lifetime of battery

The present invention relates to a determination device for calculating a remaining life of a battery by calculating an internal resistance of the battery, and more particularly to a determination device for measuring a voltage of an introduced state of a battery to be determined, It is possible to quickly and accurately calculate the internal resistance of the battery. In addition, since the constant current is different when the constant current is charged, And determines the remaining lifetime of the battery, thereby improving the accuracy of the battery.

As air pollution regulations are strengthened and technology advances, interest and dissemination of electric vehicles is increasing. The electric vehicle refers to a vehicle that uses an electric battery and an electric motor without using a petroleum fuel and an engine, and drives an automobile by rotating an electric motor that is stored in the battery. However, when the battery is continuously used, the internal resistance is increased due to deterioration, and the performance is deteriorated in which the output is decreased. When the performance of a battery deteriorates, the performance of a vehicle such as a driving distance and an output deteriorates. To prevent this, an apparatus for evaluating the remaining life of a battery by evaluating the performance of the battery is developed.

<Patent Literature>

Patent Publication No. 10-1526414 (Registered on May 1, 2015) "Apparatus and method for determining deterioration of battery for electric vehicle"

However, the conventional device for evaluating the performance of a battery estimates the internal resistance by constantly charging the constant current assuming that the battery to be diagnosed is completely discharged without considering the charge amount of the battery introduced for diagnosis, There is a problem that the determination of the internal resistance, that is, the determination of the remaining life of the battery, is quick and inaccurate.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems,

An object of the present invention is to provide an apparatus for determining battery life, which calculates the remaining life of a battery by calculating an internal resistance of the battery.

In addition, the present invention measures a voltage of an introduced state of a battery to be determined, determines whether the voltage is within a voltage range in which an internal resistance can be determined, and performs constant current charging by differentiating the corresponding battery from the corresponding battery And an internal resistance of the battery is calculated. Therefore, it is an object of the present invention to provide a battery life determining device capable of quickly and accurately calculating an internal resistance of a battery.

Another object of the present invention is to provide a battery life judging device capable of further improving the accuracy by calculating the internal resistance by determining the constant current at the time of constant current charging and judging the remaining life of the battery.

It is another object of the present invention to provide a battery life determining device capable of accurately calculating an internal resistance using an impedance.

Another object of the present invention is to provide a battery life determining device capable of easily determining the recyclability of a battery because it can calculate the remaining life time when the battery is used for its own use as well as for other purposes.

In order to achieve the above object, the present invention is implemented by the following embodiments.

According to an embodiment of the present invention, the battery life determining apparatus according to the present invention determines whether a voltage of an introduced state of a battery to be determined is within an internal resistance judgeable voltage range, and outputs an initial voltage value An initial voltage determination unit; A constant current charging unit for charging the battery with a constant current for a predetermined period when the initial voltage is output from the initial voltage determination unit and outputting a charging voltage after the charging period is completed; And an internal resistance calculation unit for calculating an internal resistance by subtracting the initial voltage value from the charging voltage value and dividing the current value by the constant current value supplied to the battery in the constant current charging.

According to another embodiment of the present invention, in the battery life judging device according to the present invention, the internal resistance judgeable voltage range is set such that a minimum charge voltage for charging a constant current is set to a lower limit and an internal resistance is calculated from a rated voltage of the battery The voltage value obtained by subtracting the charged voltage during the charging period is set to the upper limit.

According to another embodiment of the present invention, in the battery life determination apparatus according to the present invention, the initial voltage determination unit determines that the voltage of the introduced state of the battery to be determined falls within a range of 30 to 60% It is determined that the voltage exists in the judgeable voltage range.

According to another embodiment of the present invention, in the battery life determining apparatus according to the present invention, the initial voltage determining unit determines that the pre-charge voltage is less than the lower limit of the internal resistance judgeable voltage range, And a preparation charging unit charging the battery so that the output voltage of the battery is within the internal resistance judging chargeable range.

According to another embodiment of the present invention, in the battery life determining apparatus according to the present invention, the initial voltage determining unit determines whether the pre-charge voltage output from the sensor device is within the internal resistance judgeable voltage range, A measurement determination module for outputting a precharge voltage value output from the sensor device as an initial voltage value and outputting information for requesting ready charge when it is determined that the precharge voltage is lower than a lower limit of the internal resistance decider voltage range; And an output determining module for determining whether the output voltage output from the sensor device is within the internal resistance judgeable voltage range under the control of the preparation charging section and outputting the output voltage value output from the sensor device as an initial voltage value .

According to another embodiment of the present invention, a battery life determining apparatus according to the present invention further includes a remaining life determining unit for calculating and outputting a remaining life at the time of using the battery as a primary use based on the internal resistance calculated by the internal resistance calculating unit As shown in FIG.

According to another embodiment of the present invention, the apparatus for determining battery life according to the present invention further comprises an additional application determining unit for calculating and outputting a remaining service life when using the battery for other purposes based on the internal resistance calculated by the internal resistance calculating unit And the other usage determination unit calculates the remaining lifetime of each battery when the battery is used as a plurality of other applications, outputs the battery life at a time, prioritizes the battery according to a specific criterion, So that it is possible to easily grasp the optimal application of the battery.

According to another embodiment of the present invention, in the battery life determining apparatus according to the present invention, the constant current is charged several times by changing the constant current during the constant current charging by the control of the constant current charging unit, and the information obtained by each constant current charging The internal resistance estimating unit calculates each internal resistance and the remaining life determining unit estimates the remaining remaining life of the battery by averaging the remaining life of the battery based on the respective internal resistances.

According to another embodiment of the present invention, in the battery life determining apparatus according to the present invention, the value calculated when the measured temperature is changed when the remaining life of the battery is determined using the battery life determining apparatus is changed, The battery is stored and measured in a constant-temperature room maintained at a constant temperature for the purpose of excluding the battery.

According to another embodiment of the present invention, in the apparatus for determining battery life according to the present invention, the battery life determination device includes a main usage information storage unit for storing a calculation table in which a remaining service life according to an internal resistance is calculated, And a storage unit having another application information module storing a calculation table in which a remaining service life according to an internal resistance is calculated when the battery is used for other purposes.

The present invention can obtain the following effects by the above-described embodiment, the constitution described below, the combination, and the use relationship.

The present invention has the effect of calculating the remaining life of the battery by calculating the internal resistance of the battery.

In addition, the present invention measures a voltage of an introduced state of a battery to be determined, determines whether the voltage is within a voltage range in which an internal resistance can be determined, and performs constant current charging by differentiating the corresponding battery from the corresponding battery So that the internal resistance of the battery can be calculated quickly and accurately.

In addition, the present invention has the effect of further improving the accuracy since the constant current is different in the constant current charging and the internal resistance is calculated and the remaining life of the battery is determined accordingly.

Further, the present invention has the effect of accurately calculating the internal resistance by using the impedance.

In addition, the present invention can calculate the remaining lifetime of the battery in its use as well as the original use of the battery, so that the possibility of reusing the battery can be easily determined.

1 is a configuration diagram of a battery life determining apparatus according to an embodiment of the present invention;
Fig. 2 is a block diagram showing a detailed configuration of the controller of Fig. 1; Fig.
3 is a block diagram showing the detailed configuration of the storage unit of FIG.
4 is a flowchart showing a method of determining battery life using the battery life determining apparatus of FIG.
5 is a reference diagram for explaining the charging process of the battery (secondary battery).

Hereinafter, preferred embodiments of a battery life determination device according to the present invention will be described in detail with reference to the accompanying drawings. It is to be noted that the same elements among the drawings are denoted by the same reference numerals whenever possible. Unless defined otherwise, all terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs and, if conflict with the meaning of the terms used herein, It follows the definition used in the specification. Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements, rather than excluding other elements, unless specifically stated otherwise.

2 is a block diagram showing a detailed configuration of the controller of FIG. 1, FIG. 3 is a block diagram showing a detailed configuration of the storage unit of FIG. 2, and FIG. FIG. 4 is a flowchart showing a method of determining the battery life using the battery life determining apparatus of FIG. 1, and FIG. 5 is a reference diagram for explaining a charging process of the battery (secondary battery).

1 to 5, the battery life determining device includes a sensor device (not shown) for sensing a value output from the battery 100 and transmitting the sensed value to the controller 1 A charging device 300 for charging the battery 100 and a controller 300 for controlling the sensor device 200 and the charging device 300 to analyze the information output from the sensor device 200, And a display 400 for displaying a result calculated by the controller 1. The display 400 displays the results of the calculation of the remaining life of the controller 1, The sensor device 200 may be a voltage sensor connected to a battery for measuring a voltage, a current sensor for measuring a current, a temperature sensor for measuring temperature, and the like. The charging device 300 may charge the secondary battery And a conventional display such as an LCD is used as the display 400, so a detailed description thereof will be omitted. In order to eliminate the influence of the temperature, the temperature of the battery is maintained at a constant temperature (for example, about 25 DEG C) Storage and measurement are performed. Referring to FIG. 5, the principle of charging the battery using a battery (secondary battery) having a rated voltage (Vmax) of 4.2 V will be described before explaining the battery life determining device and the battery life determining method using the same. If the battery is not used for a long period of time, the voltage of the battery is less than the minimum charge voltage for performing the constant current charging (CC), so that the constant current charging can not be performed. Therefore, a preparatory charge is made to flow a small amount of current to the battery to reach the minimum charge voltage, a constant current charge (CC) is performed to charge the battery with a constant current when the voltage of the battery reaches the minimum charge voltage, When the rated voltage (4.2) is reached, constant current charging is stopped and constant voltage charging (CV) is executed. On the other hand, if the voltage of the battery before charging is larger than the minimum charging voltage, the constant current charging will be done immediately. If the internal resistance is calculated by measuring the voltage by controlling the constant current charging without considering the voltage of the battery before charging, if the voltage of the battery before charging is less than the minimum charging voltage, the incorrect internal resistance is measured. Therefore, the present invention measures the voltage of the battery before charging, judges whether the voltage is within a voltage range in which the internal resistance can be judged, calculates the internal resistance by charging the battery corresponding to the battery and the corresponding battery differently The internal resistance of the battery can be calculated quickly and accurately, as will be explained in more detail below.

The controller 1 controls the sensor device 200 and the charging device 300 to analyze the information output from the sensor device 200 to calculate the remaining life of the battery 100 and display The initial voltage determining unit 12, the preparation charging unit 13, the constant current charging unit 14, the internal resistance calculating unit 15, the remaining life determining unit 16, Unit 17, a storage unit 18, a control unit 19, and the like.

The transceiver 11 exchanges information about the remaining life of the battery with the sensor device 200, the charging device 300, and the display 400.

The initial voltage determination unit 12 determines whether the voltage of the battery in the introduction state to be determined (pre-charge voltage) or the output voltage output from the ready-to-charge unit 13 (to be described later) (Not shown), an output determination module (not shown), and the like. Since the internal resistance is calculated on the basis of data obtained in the constant current charging section, the initial voltage value and a charging voltage value to be described later must exist in the constant current charging section, And the voltage value obtained by subtracting the charged voltage during the charging period for calculating the internal resistance from the rated voltage Vmax of the battery is set to the upper limit. For example, assuming that the rated voltage of the battery is 4.2 V, the minimum charging voltage is 2.5 V, and the charging period is 10 minutes and 0.5 V is charged at this time, the lower limit is 2.5 V and the upper limit is 3.7 V, Becomes 2.5 to 3.7V. More specifically, if the pre-charge voltage or the output voltage belongs to the 30 to 60% range of the battery's rated voltage, it is determined that the pre-charge voltage or the output voltage exists in the internal resistance judgeable voltage range.

The measurement determination module (not shown) controls the sensor device 200 to determine whether the voltage of the introduced state of the battery to be determined (the pre-charge voltage) output from the sensor device 200 is within the internal resistance judging voltage range And outputs the initial charge voltage value output from the sensor device 200 as an initial voltage value. If it is determined that the precharge voltage is smaller than the lower limit of the internal resistance judgeable voltage range, .

The output determining module (not shown) determines whether the output voltage output from the sensor device 200 is within the internal resistance judging voltage range under the control of the ready charging part 13, which will be described later, And outputs an output voltage value output from the control unit 200 as an initial voltage value. When it is determined that the output voltage is lower than the lower limit of the internal resistance judgeable voltage range, information for requesting ready charge is output.

When the initial voltage determining unit 12 outputs the information for requesting the preparation charging, the preparation charging unit 13 controls the charging device 300 to charge the battery 100 to charge the battery 100 Hereinafter, referred to as "output voltage") is within the internal resistance judgeable charging range. At this time, the sensor device 200 operates, and information on the output voltage is transmitted to the controller 1. The preparation charging unit 13 may control the charging device 300 such that the output voltage is within the internal resistance judging chargeable range, but it is preferable that the charging device 300).

The constant current charging unit 14 controls the charging device 300 so that the constant current charging period is charged in the battery 100 when the initial voltage determination unit 12 outputs the initial voltage value. And controls the sensor device 200 to output the charging voltage value after the charging period is completed.

The internal resistance calculation unit 15 calculates the internal resistance by subtracting the initial voltage value from the charging voltage value and dividing the current value by the constant current value supplied to the battery in the constant current charging (internal resistance = (charging voltage value-initial voltage value) × constant current value).

The remaining life determining unit 16 calculates the remaining life at the time of use of the battery 100 for the original use of the battery 100 based on the internal resistance calculated by the internal resistance calculating unit 15 and outputs the remaining life. In the present usage information module 181 of the storage unit 18 to be described later, a calculation table in which the remaining service life according to the internal resistance is calculated when the battery is used for its original use is stored, and the remaining service life determination unit 16 determines, The resistance can be substituted into the above-mentioned calculation table to calculate the remaining service life when the battery is used for its original purpose. The information stored in the table is based on the experience gained from the experiment. The original use of the battery 100 refers to a case where the battery is used in an electric vehicle, for example, when diagnosing a battery used in an electric vehicle.

The other application determination unit 17 calculates the remaining life of the battery 100 when the battery 100 is used for other purposes based on the internal resistance calculated by the internal resistance calculation unit 15 and outputs the remaining life. The other usage determination module 172 of the storage unit 18 stores a calculation table in which the remaining service life is calculated according to the internal resistance when the battery is used for other purposes. The resistance can be substituted into the above calculation table to calculate the remaining service life when the battery is used for other purposes. The information stored in the table is based on the experience gained from the experiment. Herein, the term &quot; battery of the battery 100 &quot; refers to a state in which when the battery is used in an electric vehicle, the battery is not used in an electric vehicle and a voltage unbalance occurs due to a specific module in the PV system, Means that the battery is used for other purposes than the original use of the battery, such as when used as an energy storage device for supplying an emergency power source to the photovoltaic power generation system so as to compensate for voltage until a certain module is replaced for repair. For example, since the capacity of a battery required by an electric car differs from that of a battery required by an energy storage device for supplying emergency power to a solar power generation, a battery used for an electric vehicle can not be used for an electric vehicle due to aging, The present invention can be applied to other applications such as a battery (e.g., a battery, etc.), since the battery diagnosed by the other application determination unit 17 calculates the remaining lifetime of the battery in other applications, So that it is possible to easily judge the possibility of recycling. When the battery is used as a plurality of other applications, the other usage determination unit 17 calculates the remaining life of each battery, outputs the battery life at a time, prioritizes the battery based on a specific criterion (economic value order or remaining life order) It is possible to display the remaining service life of the other application, so that it is possible to easily grasp the optimum utilization purpose of the diagnosed battery.

The storage unit 18 is configured to store information used for battery life determination. The storage unit 18 includes a main usage information module 181 storing a calculation table in which the remaining service life is calculated according to the internal resistance when the battery is used for its original use, Purpose information module 182 in which a calculation table in which a remaining life is calculated according to the internal resistance when the battery is used for the purpose is stored, information on the battery to be diagnosed, information sensed in the battery, information calculated in the controller, A battery information module 183 that stores information used for value determination, and the like. The control unit 19 controls the overall operation of the controller 1. [

The apparatus for determining battery life according to another embodiment of the present invention performs the constant current charging several times by varying the constant current during constant current charging under the control of the constant current charging unit 14, It is possible for the acid portion 15 to calculate the respective internal resistance and the remaining life determiner 16 to average the remaining lifetimes of the batteries based on the respective internal resistances to estimate the final remaining life of the battery. The apparatus for determining battery life according to another embodiment of the present invention performs a plurality of constant current charging operations using different constant currents and calculates the respective internal resistances and averages the remaining lifetimes of the batteries based on the calculated internal resistance, The operation principle of the apparatus for determining battery life according to the embodiment of the present invention is the same as that of the apparatus for estimating the life of the battery, so a detailed description will be omitted.

The apparatus for determining battery life according to another embodiment of the present invention may further include a configuration for calculating an impedance using a phase difference between an applied signal and a measured signal and calculating an internal resistance through the calculated impedance. An impedance measuring unit (not shown) for measuring the impedance of the battery when the power is supplied to the battery by the power supply unit, and an impedance measuring unit (Not shown) for estimating the resistance, and the internal resistance calculated by the resistance measuring unit is used for determining the remaining life of the remaining life determining unit. The calculation of the internal resistance through the measured impedance is based on the calculated table of the internal resistance according to the impedance based on the experiential experience.

A method for determining the battery life using the battery life determining device according to an embodiment of the present invention will now be described with reference to FIGS. 1 to 5. The battery life determining method includes sensing step S1, (S2), a preparation charge step (S3), a constant current charging step (S4), an internal resistance calculation step (S5), a remaining number plate step (S6), and another application determination step (S7).

The sensing step S1 is a step of measuring the voltage of the introduction state of the battery 100 to be determined by the sensor device 200 (voltage before charging) and outputting it to the controller 1. [

In the initial voltage plate step S2, the initial voltage determination unit 12 determines whether the pre-charge voltage output in the sensing step S1 or the output voltage output in a charge preparation step S3, which will be described later, Is in the range.

If it is determined in the initial voltage determination step (S1) that the pre-charge voltage or the output voltage is less than the lower limit of the internal resistance judgeable voltage range and information for requesting ready charge is output, The controller 13 controls the charging device 300 to charge the battery 100 so that the output voltage of the battery 100 is within the chargeable range of the internal resistance and controls the sensor device so that information on the output voltage is supplied to the controller 1).

The constant current charging step S4 determines that the pre-charge voltage or the output voltage exists within the internal resistance judging voltage range in the initial voltage judging step S2, and when the initial voltage value is outputted, the constant current charging unit 14 Controlling the charging device 300 to charge the battery 100 for a predetermined period of time (charging period), and controlling the sensor device 200 to output a charging voltage value after the charging period is completed .

In step S5, the internal resistance calculation unit 15 subtracts the initial voltage value from the charging voltage value outputted in the constant current charging step S4, and then calculates the internal resistance by using the constant current value supplied to the battery in the constant current charging And the internal resistance is calculated.

In the remaining number plate step S6, the remaining life determining unit 16 calculates the remaining life at the time of using the battery 100 as the original use of the battery 100 based on the internal resistance calculated in the internal resistance calculating step S5 and outputs the remaining life .

In the other application determination step S7, the other application determination unit 17 calculates the remaining life at the time of using the battery 100 for other purposes on the basis of the internal resistance calculated in the internal resistance calculation step S5 and outputs the remaining life .

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, Should be interpreted as falling within the scope of.

1: controller 11: transmitting / receiving unit 12: initial voltage determining unit
13: Preparatory charging section 14: Constant current charging section 15: Internal resistance calculating section
16: remaining life determining unit 17: other use determining unit 18:
19: control unit 181: main use information module 182: other use information module
183: Battery information module 100: Battery 200: Sensor device
300: Charging device 400: Display

Claims (10)

delete An initial voltage determination unit for determining whether a voltage of an introduction state of a battery to be determined is within an internal resistance judgeable voltage range and outputting an initial voltage value when the voltage is within the internal resistance judgeable voltage range; A constant current charging unit for charging the battery with a constant current for a predetermined period when the initial voltage is output from the initial voltage determination unit and outputting a charging voltage after the charging period is completed; And an internal resistance calculation unit for calculating an internal resistance by subtracting the initial voltage value from the charging voltage value and dividing the current value by the constant current value supplied to the battery in the constant current charging,
The internal resistance judgeable voltage range is
Wherein a minimum charging voltage for charging the battery is set to a lower limit and a voltage value obtained by subtracting a charged voltage during a charging period for calculating an internal resistance from a rated voltage of the battery is set to an upper limit. 3. The apparatus of claim 2, wherein the initial voltage determination unit
Wherein the determination unit determines that the battery is in an internal resistance judgeable voltage range when the voltage of the battery to be judged belongs to the 30 to 60% range of the battery rated voltage. 3. The apparatus according to claim 2, wherein the battery life-
The initial voltage judging unit judges that the pre-charge voltage is lower than the lower limit of the internal resistance judgeable voltage range, and when the information for requesting the ready charge is outputted, the battery is charged and the output voltage of the battery is present within the chargeable range And a ready-to-live section for making the battery life determinative. The apparatus of claim 4, wherein the initial voltage determination unit
The controller determines whether the pre-charge voltage output from the sensor device is within the internal resistance judgeable voltage range, and if so, outputs the pre-charge voltage value output from the sensor device as an initial voltage value, A measurement judgment module for outputting information requesting preparation charge when it is judged that the voltage is smaller than the lower limit of the voltage range; And an output determining module for determining whether the output voltage output from the sensor device is within the internal resistance judgeable voltage range under the control of the preparation charging section and outputting the output voltage value output from the sensor device as an initial voltage value Wherein the battery life determining unit determines the battery life. 3. The apparatus according to claim 2, wherein the battery life-
Further comprising a remaining life determining unit for calculating and outputting a remaining life when the battery is used for its original use based on the internal resistance calculated by the internal resistance calculating unit. The method according to claim 6,
The battery life determining device further includes an other use determining unit for calculating and outputting a remaining life at the time of using the battery for other purposes based on the internal resistance calculated by the internal resistance calculating unit,
When the battery is used as a plurality of other applications, the other application determination unit may calculate the remaining lifetime of each battery and output the battery life at a time, prioritize the battery according to a specific criterion, So that the utilization purpose of the battery can be easily grasped. The method according to claim 6,
A plurality of constant-current charging is performed with different constant currents under constant-current charging under the control of the constant-current charging unit, the internal resistance estimating unit calculates the respective internal resistances based on the information obtained in each constant-current charging, Wherein the remaining life of the battery is estimated by averaging the remaining life of the battery based on the internal resistance. The method according to claim 6,
The battery is stored and measured in a constant temperature room maintained at a constant temperature in order to exclude the influence by the temperature because the value calculated when the measured temperature is changed when the remaining life of the battery is determined using the battery life determining device is changed. And a battery life determining device. 8. The method of claim 7,
The battery life determination device includes an application information module in which a calculation table in which a remaining life is calculated according to an internal resistance when a battery is used for an original use is stored, and an application table in which a remaining life according to an internal resistance is calculated Further comprising a storage unit having an other-purpose information module in which the other-purpose information module is stored.
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101865402B1 (en) * 2017-03-30 2018-07-13 (주)에코파워텍 Apparatus for assessing state of battery
WO2022035131A1 (en) * 2020-08-13 2022-02-17 주식회사 엘지에너지솔루션 Battery management system, battery management method, battery pack and electric vehicle
KR102367195B1 (en) * 2021-01-21 2022-02-24 한국전지연구조합 System and method for residual value evaluation of used battery module
WO2022039505A1 (en) * 2020-08-20 2022-02-24 주식회사 엘지에너지솔루션 Battery management system, battery management method, battery pack, and electric vehicle
KR20240077618A (en) 2022-11-24 2024-06-03 선광엘티아이(주) Residual value reading method and residual value reading device for determining whether battery cells can be reused after use

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JP2015052590A (en) 2013-09-09 2015-03-19 三星エスディアイ株式会社Ｓａｍｓｕｎｇ ＳＤＩ Ｃｏ．，Ｌｔｄ． Battery pack, device having battery pack, and management method for battery pack

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101865402B1 (en) * 2017-03-30 2018-07-13 (주)에코파워텍 Apparatus for assessing state of battery
WO2018182132A1 (en) * 2017-03-30 2018-10-04 (주)에코파워텍 Device for determining battery condition
WO2022035131A1 (en) * 2020-08-13 2022-02-17 주식회사 엘지에너지솔루션 Battery management system, battery management method, battery pack and electric vehicle
WO2022039505A1 (en) * 2020-08-20 2022-02-24 주식회사 엘지에너지솔루션 Battery management system, battery management method, battery pack, and electric vehicle
KR102367195B1 (en) * 2021-01-21 2022-02-24 한국전지연구조합 System and method for residual value evaluation of used battery module
WO2022158774A1 (en) * 2021-01-21 2022-07-28 한국전지연구조합 System for evaluating residual value of battery module after use, and method therefor
KR20240077618A (en) 2022-11-24 2024-06-03 선광엘티아이(주) Residual value reading method and residual value reading device for determining whether battery cells can be reused after use

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