KR20210133134A - Battery electric flow test system and metho - Google Patents

Abstract

The present invention relates to a battery electric flow test system and a method thereof. The battery electric flow test system comprises: a test item management unit operating in response to an output of a user input unit and managing registration, correction, deletion, and display of set values, measured values, and diagnostic values for each battery test item; a set value storage unit matching and storing a set value for each test item which is registered by the test item management unit to a corresponding battery type; an AC impedance measuring device varying an input frequency and sequentially inputting the same to a waste battery and outputting an output frequency for each input frequency; an impedance determining unit operating the AC impedance measuring device according to an instruction of the test item management unit, finding a resonance frequency of the high frequency by identifying the phase difference between the input frequency input to the waste battery and the output frequency corresponding to the input frequency, and calculating an AC impedance corresponding to the found resonance frequency of the high frequency; and an impedance diagnosis unit for comparing the AC impedance calculated by the impedance determining unit with an upper limit of electric flow and diagnosing that it is normal if the calculated AC impedance is lower than the upper limit of electric flow, and that it is abnormal if higher. The present invention is capable of performing electricity flow inspection of waste batteries.

Description

Battery electric flow test system and method {BATTERY ELECTRIC FLOW TEST SYSTEM AND METHO}

The present invention relates to an electricity flow inspection technology for a waste battery (used battery), and before reusing or recycling the waste battery, confirming the state of charge of the waste battery and whether it can be charged, and checking electrical resistance through electrical resistance test It relates to a battery electricity flow inspection system and method for checking the presence or absence.

According to the 「Specific Observances of Persons Recycling Wastes」 in accordance with Article 13-2 (3) of the 「Waste Management Act」, Article 13-2 (3) of the Enforcement Rule of the same Act, and Annex 5-4 No. 3 of the Enforcement Rule of the same Act, "the A person who intends to recycle waste batteries must conduct an external inspection and an electric flow test of the waste batteries for electric vehicles before recycling."

In the announced contents, the electricity flow inspection of the waste battery is to check the current state of charge and whether charging is possible through the connection of the charging equipment, and to check whether there is an abnormality in the electricity flow through the electrical resistance test.

However, there has not been provided a system or device for checking the electricity flow of waste batteries through connection of charging equipment so far.

The problem to be solved by the present invention is to provide a battery electricity flow inspection system and method capable of performing electricity flow inspection of a waste battery.

SUMMARY OF THE INVENTION An object of the present invention is to provide a battery electricity flow inspection system and method capable of performing an electricity flow diagram inspection on a waste battery of an electric vehicle at a low price.

In addition to the above problems, the embodiment according to the present invention may be used to achieve other problems not specifically mentioned.

The battery electricity flow inspection system according to an embodiment of the present invention for solving the above problems operates in response to the output of the user input unit, and registers, corrects, deletes, and displays setting values, measured values, and diagnostic values for each battery inspection item. Inspection item management unit for managing, a setting value storage unit for matching and storing the setting value for each inspection item registered by the inspection item management unit to the corresponding battery type, sequentially inputting the input frequency to the waste battery by varying the input frequency AC impedance measuring device that outputs an output frequency for frequency, operating the AC impedance measuring device according to the instruction of the inspection item management unit, and grasping the phase difference between the input frequency input to the waste battery and the output frequency corresponding to the input frequency An impedance determination unit that finds the resonance frequency of , and calculates an AC impedance corresponding to the resonant frequency of the found high frequency, compares the AC impedance calculated by the impedance determination unit with the upper limit of electric flow, and the calculated AC impedance is lower than the upper limit of electric flow If it is high, it is diagnosed as normal, and when it is high, it includes an impedance diagnosis unit that is determined to be abnormal.

The battery electricity flow inspection system according to an embodiment of the present invention operates a battery voltage measuring device electrically connected according to the instruction of the inspection item management unit, and a battery voltage determining unit for determining the voltage of the waste battery through the battery voltage measuring unit; A voltage diagnosis unit that compares the battery voltage grasped by the battery voltage grasper with a set voltage range, and diagnoses normal if the identified battery voltage is within the set voltage range, otherwise diagnoses abnormal. The insulation resistance measuring unit electrically connected according to the operation is performed, and the insulation resistance grasping unit which grasps the insulation resistance of the waste battery through the insulation resistance meter, the insulation resistance grasped by the insulation resistance determination unit is compared with the set insulation resistance lower limit, and the When the insulation resistance is lower than the set insulation resistance, it is determined that it is abnormal, and when it is high, the insulation resistance diagnosis unit diagnoses normal, and the voltage diagnosis unit, the insulation resistance diagnosis unit, and the It may further include a conformity diagnosis unit for determining whether or not the appropriate suitability.

The inspection item management unit has a field in which a user can input or display a battery type, the set voltage range according to the battery type, the insulation resistance lower limit, and the electric flow upper limit, and the battery voltage, insulation Item setting screen having a field for displaying resistance and AC impedance, a field for displaying the state of charge, electrical flow and insulation safety according to the diagnosis result of each diagnostic unit, and a field for displaying the final conformity diagnosed by the conformity diagnosis unit is provided to the user through the display device.

The battery electricity flow inspection method according to an embodiment of the present invention for solving the above problems includes the steps of setting the type of the waste battery to be inspected and the set value for each inspection item, and operating the AC impedance measuring device according to the user's request to the waste battery inputting a first input frequency to and determining a first output frequency with respect to the first input frequency; determining a first phase difference between the first input frequency and the first output frequency; 0' to find the resonance frequency, input a second input frequency to the waste battery by varying the frequency, and determine a second output frequency for the second input frequency, setting the frequency to a set frequency sequentially Variably input to the waste battery, identifying the phase difference between the input frequency input to the waste battery and the output frequency corresponding to the input frequency to find and register a resonance frequency, the highest frequency band among the registered resonance frequencies determining as the resonance frequency of the high frequency, calculating an AC impedance using the voltage and current at the resonance frequency of the high frequency, and comparing the calculated AC impedance with the upper limit of electric flow of the set value. If the impedance is lower than the upper limit of electric flow, it is diagnosed as normal, and when it is high, it is determined that it is abnormal.

According to an embodiment of the present invention, it is possible to check the electric flow diagram of the battery after use of the electric vehicle in accordance with the ordinance of the Ministry of Environment.

SUMMARY OF THE INVENTION An object of the present invention is to provide a system and method capable of inspecting an electric flow diagram of a battery after use of an electric vehicle at a low price using an AC power source.

In addition to the above problems, the embodiment according to the present invention may be used to achieve other problems not specifically mentioned.

1 is a block diagram of a battery electricity flow inspection system according to an embodiment of the present invention.
2 is a perspective view of a battery electricity flow inspection system according to an embodiment of the present invention.
3 is a view showing in detail the configuration of impedance measurement in the battery electricity flow inspection system according to an embodiment of the present invention.
4 and 5 are diagrams for explaining an impedance measurement operation in the battery electricity flow inspection system according to an embodiment of the present invention.
6 and 7 are views showing a screen for displaying inspection items and inspection results in the battery electricity flow inspection system according to an embodiment of the present invention.
8 is a flowchart illustrating a battery electricity flow test method according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described in detail so that those of ordinary skill in the art to which the present invention pertains can easily implement them. The present invention may be embodied in several different forms and is not limited to the embodiments described herein. In order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and the same reference numerals are used for the same or similar components throughout the specification. In addition, in the case of a well-known known technology, a detailed description thereof will be omitted.

In the present specification, when a part "includes" a certain component, it means that other components may be further included rather than excluding other components unless otherwise stated.

Hereinafter, a battery electricity flow inspection system and method according to an embodiment of the present invention will be described with reference to the accompanying drawings.

Prior to description, a battery referred to below means a waste battery used in an electric vehicle, and the battery to be inspected is one of a battery cell, a battery module, or a battery pack.

1 is a block diagram of a battery electricity flow inspection system according to an embodiment of the present invention. Referring to FIG. 1 , the battery electricity flow inspection system 100 according to an embodiment of the present invention includes an inspection item management unit 110 , a set value storage unit 120 , a battery voltage determination unit 130 , and an insulation resistance determination unit ( 140 , an impedance determining unit 150 , a voltage diagnosis unit 160 , an insulation resistance diagnosis unit 170 , an electric flow diagnosis unit 180 , a suitability diagnosis unit 190 , and an AC impedance measuring unit 230 .

Here, if the AC impedance measuring device 230 is manufactured in a form detachable from the system 100 of the present invention, the system 100 according to the embodiment of the present invention may omit the AC impedance measuring device 230 .

On the other hand, when the battery electricity flow test system according to an embodiment of the present invention uses only the AC impedance measuring unit 230 , the battery voltage determining unit 130 , the insulation resistance determining unit 140 , the voltage diagnosis unit 160 , and the insulation resistance The diagnosis unit 170 may be omitted.

The inspection item management unit 110 manages a set value, a measured value, a diagnostic value, and a final inspection value for each battery inspection item. The set value means a reference value for each test item for comparison with the measured value, and the measured value means a value measured for each test item, for example, a measured battery voltage, a measured battery insulation resistance, and a measured battery impedance. . In addition, the diagnosis value is a result of comparison between a reference value and a measured value for each test item, and means normal (pass) or abnormal (fail). In addition, the final test value is a value indicating the suitability of the final battery according to the diagnostic value, and means, for example, suitability or non-compliance.

In addition, the inspection item management unit 110 registers a set value that is a reference value of each inspection item for each battery type according to a user's request input through the user input unit 10, and performs management such as correction or deletion of the set value. do. The inspection item management unit 110 generates an item setting screen to be displayed externally through the display device 20, and the user inputs and registers a new battery type and set values for the new battery type through the item setting screen, Check the setting values for each inspection item, various diagnostic values, and final inspection values for the battery to be used through the item setting screen.

Here, the item setting screen will be described with reference to FIGS. 6 and 7 . 6 and 7 are views showing a screen for displaying inspection items and inspection results in the battery electricity flow inspection system according to an embodiment of the present invention.

6 and 7 , on the left side of the item setting screen, there is a field (①) in which a user inputs a battery ID (identification information) or calls a registered battery ID and displays it, and the user enters or registers a battery type A field to call and display the battery type (②), a button to call a new item setting screen to record new battery information (③), a button to delete the currently displayed battery information (④), A field (⑤) for the user to enter a set value for an inspection item or to call the registered setting value and display it and a button (⑥) to instruct the start of the inspection are displayed. The button (⑥) instructing the start of the examination is changed to "initialization of examination" and displayed when the user clicks the corresponding button.

And in the field (⑤), "voltage range", a field indicating the upper and lower limits of the battery voltage in the corresponding battery type, "capacity", a field indicating a reference current value, and "upper limit of electricity flow" There is a field indicating the upper limit of the AC impedance, marked ", and a field indicating the lower limit of the insulation resistance, marked "Insulation resistance lower limit".

In addition, on the right side of the item setting screen, there is a field for displaying the measurement value and measurement result for the inspection item.

For example, referring to FIGS. 6 and 7 , on the right side of the item setting screen, there is a field (⑦) that displays the test progress, and the measured battery voltage and SOC (remaining capacity), which are marked as "charged state" Field indicating (⑧), "Electrical flow" field indicating measured AC impedance (⑨), "Insulation stability" field indicating measured insulation resistance (⑩), There is a field (⑪) that displays the diagnosis result according to each measurement value and a field (⑫) that displays the final electricity flow test result.

The SOC is calculated using the battery voltage or is determined using an SOC table generated using the maximum and minimum voltages of the battery.

In FIG. 6, looking at the measurement results on the right side of the item setting screen, the measured battery voltage is 27.72V, which is located within the set voltage range of 24.20V to 29.40V and is displayed as normal (pass), and AC impedance, that is, electricity flow It is displayed as pass because the property is 15.62Ω and less than the set value of 20.00Ω, and the measured insulation resistance is displayed as pass because the measured insulation resistance exceeds the set value of 1.00MΩ. Accordingly, the final inspection result was marked as “suitable/refillable” as all inspection items were normal.

On the other hand, in FIG. 7 , looking at the measurement results on the right side of the item setting screen, the measured battery voltage is 27.71V, which is out of the set voltage range of 288.00V to 403.20V, and is displayed as abnormal (FAIL), and AC impedance, that is, Since the electrical flow property is 15.62Ω and less than the set value of 416.65Ω, it is displayed as pass, and the measured insulation resistance exceeds the set value of 1.00MΩ and is displayed as pass. As a result, the final inspection result was marked as "unsuitable/impossible to fill" as there was an abnormality in one of all inspection items.

Returning again, the setting value storage unit 120 stores the setting value for each inspection item registered by the inspection item management unit 110 by matching the corresponding battery type. Of course, the set value storage unit 120 may store the test result of the tested waste battery.

The battery electricity flow inspection system 100 according to an embodiment of the present invention has a measurement value identification unit (A) for understanding the measurement value for each inspection item. Each determination unit of the measurement value determination unit A operates according to the instruction of the inspection item management unit 110 , and provides the determined measurement value to the examination item management unit 110 . The measurement value determination unit A includes a battery voltage determination unit 130 , an insulation resistance determination unit 140 , and an impedance determination unit 150 .

The battery voltage determiner 130 controls the operation of the battery voltage meter 210 to receive the measurement result measured by the battery voltage meter 210 and measure the battery voltage (eg, the voltage of the battery cell or battery module or battery pack). figure out Here, the battery voltage measuring device 210 is a device that measures the voltage of the battery by having one measuring terminal connected to the negative electrode of the battery and the other measuring terminal being connected to the positive electrode of the battery, and is a typical battery voltage measuring device.

The insulation resistance determination unit 140 controls the operation of the battery voltage meter 210 to receive and determine the insulation resistance of the battery measured by the insulation resistance meter 220 . Here, the insulation resistance measuring device 220 is a device for measuring the insulation resistance of a conventional battery, for example, one terminal is connected to one of the positive or negative terminals of the battery, and the other terminal is connected to the body of the battery. It may be a device for measuring the insulation resistance of a battery.

The impedance determining unit 150 controls the operation of the AC impedance measuring device 230 to receive the frequency of a plurality of currents supplied from the AC impedance measuring device 230 and the frequency of the voltage measured in response to the frequency of the supplied current and , after determining the phase difference between the frequency with respect to the current and voltage of the same frequency, the AC impedance is determined using the voltage and current of the frequency with no phase difference. Here, the AC impedance represents the same value as the DC impedance with respect to the DC power source using the voltage and current of a frequency having no phase difference.

The battery electricity flow inspection system 100 according to an embodiment of the present invention has a measurement value diagnosis unit B for diagnosing whether a measurement value for each inspection item is normal or abnormal. Each diagnosis unit of the measurement value diagnosis unit B provides a diagnosis result to the inspection item management unit 110 . The measurement value diagnosis unit determination unit B includes a voltage determination unit 160 , an insulation resistance diagnosis unit 170 , and an electricity flow diagnosis unit 180 .

The voltage diagnosis unit 160 compares the voltage determined by the battery voltage determination unit 130 with a set voltage, that is, a set voltage range, and diagnoses whether the detected voltage is within the set voltage range. The voltage diagnosis unit 160 diagnoses normal if the detected voltage is within the set voltage range, and otherwise diagnoses as abnormal.

The insulation resistance diagnosis unit 170 compares the insulation resistance determined by the insulation resistance determination unit 140 with the set insulation resistance, and if the insulation resistance determined is higher than the set insulation resistance, it is diagnosed as normal, otherwise it is diagnosed as abnormal.

The electric flow diagnosis unit 180 compares the AC impedance determined by the impedance determination unit 150 with the set impedance, and if the determined AC impedance is lower than the set insulation resistance, it is diagnosed as normal, otherwise it is diagnosed as abnormal.

The conformity diagnosis unit 190 receives each diagnosis result output from the voltage diagnosis unit 160, the insulation resistance diagnosis unit 170, and the electricity flow diagnosis unit 180, determines the final compatibility, and determines the compatibility result. is provided to the inspection item management unit 110 .

AC impedance measuring device 230 sequentially generates the frequency of the set frequency band in the order of the minimum frequency to the maximum frequency or in the order of the maximum frequency to the minimum frequency, and inputs it to the waste battery 30, and outputs the frequency corresponding to the input frequency to the impedance provided to the grasping unit 150 .

The battery electricity flow inspection system 100 according to an embodiment of the present invention configured as described above is manufactured as shown in FIG. 2 as an example. 2 is a perspective view of a battery electricity flow inspection system according to an embodiment of the present invention. Referring to FIG. 2 , the display device 20 is configured as a general monitor, and in the battery electricity flow inspection system 100 , a connection member of a socket or plug to be electrically connected to the terminals of each measuring instrument 210 , 220 , 230 . is installed Of course, if the AC impedance measuring device 230 is configured as a configuration, the battery electricity flow test system 100 will be integrally configured with the AC impedance measuring device 230 .

Hereinafter, the impedance determining unit 150 and the AC impedance measuring device 230 in the electric flow inspection system according to an embodiment of the present invention will be described with reference to FIGS. 3 to 5 . 3 is a view showing in detail the configuration of impedance measurement in the battery electric flow inspection system according to an embodiment of the present invention, Figures 4 and 5 are to explain the impedance measurement principle in the battery electric flow inspection system according to an embodiment of the present invention is a drawing for

Electrical flow test is to examine the flow of AC current, and the flow of AC current is affected by AC impedance. However, since a battery is an electrochemical device that uses direct current electricity, it is a measure of the suitability of electric flow for this, the resistance to direct current shows the most similar direct current resistance value when there is no phase difference between current and voltage when measured through alternating current. .

To explain this in detail, as is generally known, the impedance (Z) in DC electricity is calculated as “Z = resistance (R)”, and the impedance (Z) in AC electricity is “Z = R (resistance) + jX ( impedance)". That is, in AC electricity, unlike in DC electricity, the flow of AC current is affected by impedance (X), and reactance (X) includes inductive reactance (X _L ) and capacitive reactance (X _C ).

The inductive reactance (X _L ) and the capacitive reactance (X _C ) can be expressed by Equations 1 and 2 below.

In Equations 1 and 2, f is frequency, L is inductance, and C is capacitance.

Referring to Equations 1 and 2, it can be seen that the inductive reactance (X _L ) and the capacitive reactance (X _C ) are affected by frequency. That is, the inductive reactance (X(L)) and the capacitive reactance (X(C)) are factors that affect the frequency of the current and the frequency of the voltage. Affects the period and rate of change with respect to the frequency of the current. These inductive reactance (X(L)) and capacitive reactance (X(C)) cause them to move opposite in magnitude with frequency.

The phase difference (φ) between the frequency of the current and the frequency of the voltage can be expressed by the following Equation (3).

Therefore, when the impedance of the inductive reactance (X(L)) and the capacitive reactance (X(C)) becomes equal, the phase difference between the frequency of the current and the frequency of the voltage becomes '0', and accordingly, the AC impedance is equal to the DC impedance. becomes the same The frequency when the phase difference between the frequency of the current and the frequency of the voltage becomes '0' in the electric circuit is called the resonance frequency.

Therefore, in the present invention, the resonance frequency is found during electric flow measurement, and the AC impedance at the resonance frequency is used as the measured AC impedance.

According to the electric flow measurement principle of the present invention, the impedance determining unit 150 and the AC impedance measuring unit 230 are configured as shown in FIG. 3 . 3 is a diagram showing in detail the configuration of impedance measurement in the battery electricity flow inspection system according to an embodiment of the present invention.

Referring to FIG. 3 , the impedance determining unit 150 includes a measurement control unit 151 , a phase difference determining unit 152 , and an impedance calculating unit 153 , and the AC impedance measuring unit 230 includes a frequency adjusting unit 231 . ), an input frequency generating unit 232 and an output frequency measuring unit 233 are included.

The measurement control unit 151 operates the AC impedance measuring unit 230 according to the instruction of the inspection item management unit 110 , and the phase difference determining unit 152 uses the input frequency input to the waste battery 30 and the waste battery 30 . Receive the output frequency and find out the phase difference between the two frequencies. Here, the input frequency is the frequency of the current, and the output frequency is the frequency of the voltage.

The impedance calculating unit 153 determines when the value of the phase difference continuously received from the phase difference determining unit 152 is '0', and the amplitude of the input frequency and the output frequency at the time when the value of the phase difference is '0', that is, , calculate the AC impedance (Z) using the current and voltage values. At this time, since the value of the phase difference of the AC impedance Z is '0', only the resistance R is calculated.

The operations of the phase difference determining unit 152 and the impedance calculating unit 153 will be described with reference to FIGS. 4 and 5 . 4 and 5 are diagrams for explaining an impedance measurement operation in a battery electricity flow inspection system according to an embodiment of the present invention, and FIG. 4 is a Bode plot showing a phase difference and impedance change of frequency according to frequency change , and FIG. 5 is a Nyquist plot for a real part and an imaginary part.

Referring to the board diagram shown in (a) of FIG. 4 , theta (φ), which is the phase difference between the current and the voltage detected by the impedance calculator 153 when the frequency is changed from 0.1 by the AC impedance measuring device 230, is As in the g1 graph, it changes from a negative value to a positive value. Among these changes, at least one resonant frequency at which the phase difference becomes '0' is found, and the impedance calculator 153 searches for the highest frequency among the at least one resonant frequency, that is, the resonant frequency of the high frequency.

And, as shown in FIG. 4(b), the impedance calculating unit 153 calculates the impedance at the resonant frequency of the high frequency found in FIG.

When the content of FIG. 4 is explained through the Nyquist diagram of FIG. 5, when the frequency is changed from 01., the AC impedance of the waste battery 30 is '0' on the vertical axis, which is the imaginary part, and only the value on the horizontal axis, which is the real part, exists. The interval is displayed, and the interval in which the values of the imaginary part and the real part appear at the same time is displayed. In this case, the section in which the value of the vertical axis, which is the imaginary part, is '0' and the value on the horizontal axis, which is the real part, only exists is the section in which the phase difference between the voltage and the current is '0', and the impedance at the point where the value of the real part is the most is the impedance calculating unit 153 ) is the AC impedance calculated from

Hereinafter, a battery electricity flow test method according to an embodiment of the present invention will be described. 8 is a flowchart illustrating a battery electricity flow test method according to an embodiment of the present invention.

Referring to FIG. 8 , the user electrically connects the battery voltage meter 210 and the insulation resistance meter 220 to the system 100 for the battery electric flow test, and the battery voltage meter 210 and the insulation resistance meter 220 ) and the test terminal of the AC impedance measuring device 230 is connected to the waste battery 30 .

In this state, when the user requests a battery flow test through the user input unit 10, the inspection item management unit 110 displays an item setting screen, which is a setting window, through the display device 20 (S801).

Accordingly, when the user selects or inputs inspection target information on the battery to be inspected on the item setting screen through the user input unit 10, the inspection item management unit 110 receives inspection target information, for example, a battery type or battery ID ( S802), the set value for each test item for the received test target is called from the set value storage unit 120 and displayed on the item setting screen (S803).

And when the user clicks the test start button (⑥) on the item setting screen, the test item management unit 110 notifies each of the grasping units 130, 140, 150 of the start of the test (S804).

Accordingly, the battery voltage determining unit 130 operates the battery voltage measuring unit 210 to measure the voltage of the waste battery 30, and through the measured result, the battery voltage is determined and provided to the voltage diagnosis unit 160 ( S805).

The voltage diagnosis unit 160 calculates the state of charge (SOC) of the waste battery with the received battery voltage, and provides the voltage of the battery and the calculated SOC information of the battery to the inspection item management unit 110 to display each information on the item setting screen. to be displayed (S806)

In addition, the voltage diagnosis unit 160 diagnoses whether the received battery voltage is within a set voltage range and whether the SOC of the battery is appropriate, and provides the diagnosis result to the inspection item management unit 110 for diagnosis related to the battery voltage on the item setting screen. The result is displayed (S807).

The insulation resistance determining unit 140 operates the insulation resistance measuring unit 220 to measure the insulation resistance of the waste battery 30, and the insulation resistance of the battery is determined through the measurement result and provided to the insulation resistance diagnosis unit 170 ( S808). The insulation resistance diagnosis unit 170 diagnoses whether the received insulation resistance exceeds the set insulation resistance lower limit, and provides the diagnosis result to the inspection item management unit 110 so that the insulation resistance, that is, the insulation stability-related diagnostic result is displayed on the item setting screen to be (S809).

The impedance determining unit 150 operates the AC impedance measuring device 230 (S810), and the AC impedance measuring device 230 varies the frequency so that the input frequency increases from 0.1 Hz to the set frequency (S811), and the battery 30 ) and an output frequency corresponding thereto are provided to the impedance determining unit 150 to determine a phase difference between the input frequency and the output frequency in the impedance determining unit 150 (S812).

And the impedance determination unit 150 finds the resonance frequency of the high frequency with a phase difference of '0' (S813), and uses the voltage value and current value of the resonance frequency of the high frequency found to determine the AC impedance, and diagnose the AC impedance as an electrical flow It is provided to the unit 180 and the inspection item management unit 110 (S814). Accordingly, the electricity flow diagnosis unit 180 compares the identified AC impedance with the set electric flow upper limit, and if the AC impedance is lower than the electric flow upper limit, diagnoses it as normal, and if it is high, it diagnoses it as abnormal, and provides the diagnosis result to the inspection item management unit 110 to be displayed on the item setting screen (S815).

The diagnosis results from the respective diagnosis units 160 , 170 , and 180 are received by the suitability determining unit 190 , and the suitability determining unit 190 synthesizes each diagnosis result to diagnose conformity or nonconformity, and transmits the diagnosis result to the inspection item management unit. It is provided to 110 to be displayed on the item setting screen (S816).

Although the embodiment of the present invention has been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements by those of ordinary skill in the field to which the present invention belongs are also entitled to the rights of the present invention. belong to the scope

110: inspection item management unit 120: set value storage unit
130: battery voltage determination unit 140: insulation resistance determination unit
150: impedance determination unit 160: voltage diagnosis unit
170: insulation resistance diagnosis unit 180: electricity flow diagnosis unit
190: conformity diagnosis unit 210: battery voltage meter
220: insulation resistance meter 230: AC impedance meter
150: measurement control unit 152: phase difference detection unit
153: impedance calculating unit 231: frequency adjusting unit
232: input frequency generating unit 233: output frequency measuring unit

Claims (4)

In the system for inspecting the electricity flow of a waste battery,
An inspection item management unit that operates in response to the output of the user input unit and manages registration, correction, deletion, and display of set values, measured values, and diagnostic values for each battery inspection item;
a setting value storage unit for matching and storing the setting value for each inspection item registered by the inspection item management unit with the corresponding battery type;
AC impedance measuring device for sequentially inputting a variable input frequency to the waste battery and outputting an output frequency for each input frequency,
In accordance with the instructions of the inspection item management unit, the AC impedance measuring device is operated, and the phase difference between the input frequency input to the waste battery and the output frequency corresponding to the input frequency is found to find the resonance frequency of the high frequency, and to the resonance frequency of the found high frequency an impedance determining unit that calculates a corresponding AC impedance;
Comparing the AC impedance calculated by the impedance determining unit with the upper limit of electric flow, and diagnosing that the calculated AC impedance is lower than the upper limit of electric flow, diagnosing normal, and diagnosing that the calculated AC impedance is higher than the upper limit of electric flow. In claim 1,
A battery voltage determination unit that operates an electrically connected battery voltage meter according to the instruction of the inspection item management unit, and determines the voltage of the waste battery through the battery voltage meter;
A voltage diagnosis unit that compares the battery voltage grasped by the battery voltage grasper with a set voltage range, and diagnoses normal if the identified battery voltage is within the set voltage range, otherwise diagnoses abnormal;
An insulation resistance determination unit that operates an electrically connected insulation resistance meter according to the instructions of the inspection item management unit, and determines the insulation resistance of the waste battery through the insulation resistance meter,
An insulation resistance diagnosis unit that compares the insulation resistance determined by the insulation resistance determination unit with a set insulation resistance lower limit, and determines that it is abnormal if the determined insulation resistance is lower than the set insulation resistance and diagnoses it as normal if it is high, and
The battery electricity flow inspection system further comprising a suitability diagnosis unit for receiving each diagnosis result output from the voltage diagnosis unit, the insulation resistance diagnosis unit, and the electricity flow diagnosis unit to determine final suitability. In claim 2,
The inspection item management unit has a field in which a user can input or display a battery type, the set voltage range according to the battery type, the insulation resistance lower limit, and the electric flow upper limit, the battery voltage, the insulation An item setting screen having a field for displaying resistance and AC impedance, a field for displaying the state of charge, electrical flow and insulation safety according to the diagnosis result of each diagnostic unit, and a field for displaying the final conformity diagnosed by the conformity diagnosis unit A battery electricity flow inspection system that provides the user with a display device. Setting the type of waste battery to be inspected and the set value for each inspection item;
operating an AC impedance measuring device according to a user's request, inputting a first input frequency to the waste battery, and determining a first output frequency for the first input frequency;
determining a first phase difference between the first input frequency and the first output frequency;
Finding a resonance frequency by determining whether the first phase difference is '0';
inputting a second input frequency to the waste battery by varying the frequency and determining a second output frequency for the second input frequency;
Sequentially varying the frequency up to a set frequency, inputting it into the waste battery, identifying the phase difference between the input frequency input to the waste battery and the output frequency corresponding to the input frequency, finding and registering the resonance frequency;
determining a frequency having the highest band among the registered resonant frequencies as a resonant frequency of a high frequency;
Calculating an AC impedance using the voltage and current at the resonant frequency of the high frequency, and
Comparing the calculated AC impedance with the upper limit of electric flow of the set value, and diagnosing that the calculated AC impedance is lower than the upper limit of electric flow, diagnosing as normal, and judging that it is abnormal if higher than the upper limit of electric flow.

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