KR102140632B1 - Apparatus for diagnosing status of battery - Google Patents

Abstract

The present invention relates to a device for diagnosing a state of a battery using an impedance spectrum characteristic of a battery. According to one embodiment of the present invention, the device comprises: an internal battery which can be charged by an external power source and supplies a power source for the operation of the device; a measurement unit which measures impedance related to a battery to be measured; a control unit which diagnoses a state of the battery to be measured by analyzing a measurement result by the measurement unit; and a display unit which displays a value measured by the measurement unit or information on the state analyzed by the control unit.

Description

A device for diagnosing the state of the battery{APPARATUS FOR DIAGNOSING STATUS OF BATTERY}

The present invention relates to a device for diagnosing the state of a battery by using the impedance spectrum characteristic of the battery to diagnose the state of the battery.

2. Description of the Related Art As demand for various portable electronic equipment increases, batteries such as secondary batteries are widely used as a power source for these devices. In particular, lithium-ion (Li-ion) batteries have been widely used because of their high energy density, high operating voltage, and high charging capacity and convenient portability.

As such batteries are continuously charged and discharged, their durability decreases, and there is a risk of accidents such as explosions. In addition, there is a problem in that the charging capacity decreases as the charging and discharging are repeated, thereby reducing the use time. To solve these problems, the battery's state of charge (SoC), state of health (SoH), state of power (SoP), state of capacity (SoQ), state of balance (SoB), and state of energy (SoE) By measuring the condition of the battery, there is a need for a technique for predicting whether the battery is abnormal and the life of the battery.

The present invention is to diagnose the state of the battery by using the impedance spectrum (impedance spectrum) characteristics of the battery.

The technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by a person having ordinary knowledge in the technical field to which the present invention belongs from the following description. Will be able to.

According to an embodiment of the present invention, a device for diagnosing a state of a battery to be measured can be charged by an external power source, an internal battery supplying power for operation of the device, and an impedance associated with the battery to be measured. Measuring unit for measuring, a control unit for diagnosing the state of the battery to be measured by analyzing the measurement result by the measuring unit, and a display unit for displaying information about a value measured by the measuring unit or a state analyzed by the control unit It includes.

The measuring unit may be characterized by measuring the impedance spectrum of the battery to be measured.

The measuring unit may be characterized in that the measurement is performed based on impedance spectroscopy.

The measuring unit may measure at least one of an AC (alternative current) resistance value and a DC (direct current) resistance value of the battery to be measured.

The measuring unit may measure at least one of an AC (alternative current) resistance value and a DC (direct current) resistance value of the battery to be measured.

The controller may diagnose the aging state of the battery to be measured based on the AC resistance value.

The controller may be configured to diagnose a discharge state of the battery to be measured based on the DC resistance value.

The control unit outputs a value measured by the measurement unit or information about a state analyzed by the control unit in a file format readable by an external device, and the file conforms to one of csv, text, and xls formats. It can be characterized by.

The apparatus further includes a communication unit that performs communication for accessing an external server that provides environmental information, and the control unit diagnoses a state of the battery to be measured based on environmental information collected from the external server. Can be done with

The communication unit may transmit information about the current location of the device to the external server.

The apparatus for diagnosing the state of a battery according to the present invention enables a more accurate diagnosis of the state of a battery, and furthermore, provides portability, thereby enabling more convenient diagnosis.

The effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those skilled in the art from the following description. will be.

Other aspects, features and benefits as described above of certain preferred embodiments of the present invention will become more apparent from the following description, which is processed in conjunction with the accompanying drawings.
1 is an example of an electrical model of a battery.
2 is an example of a simplified battery impedance model.
3 is an example of a change in battery impedance according to frequency.
FIG. 4 is an example of Rs change of a new lithium ion battery and an old battery.
5 is an example of an impedance that varies depending on a state of charge of a lithium ion battery.
6 is an example of a relationship between an SoC of a lithium ion battery and an imaginary component of impedance.
7 is an example of classification of a state of a battery according to an impedance form of frequency characteristics.
8 is a configuration diagram of a battery diagnostic equipment according to an embodiment of the present invention.
9A to 9V are examples of screens displayed on a display unit of a battery diagnostic equipment according to an embodiment of the present invention.
10 is a diagnostic procedure of a battery diagnostic equipment according to an embodiment of the present invention.
11 is a diagnostic procedure of a battery diagnostic equipment according to another embodiment of the present invention.
12 is an example of using a battery diagnostic equipment according to another embodiment of the present invention.
13 is a block diagram illustrating a management system for managing battery diagnostic equipment according to an embodiment of the present invention.
It should be noted that through the drawings, like reference numerals are used to show the same or similar elements, features and structures.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In describing the embodiments, descriptions of technical contents well known in the technical field to which the present invention pertains and which are not directly related to the present invention will be omitted. This is to more clearly communicate the subject matter of the present invention by omitting unnecessary description.

For the same reason, some components in the accompanying drawings are exaggerated, omitted, or schematically illustrated. Also, the size of each component does not entirely reflect the actual size. The same reference numbers are assigned to the same or corresponding elements in each drawing.

Advantages and features of the present invention, and methods for achieving them will be clarified with reference to embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the art to which the present invention pertains. It is provided to fully inform the person having the scope of the invention, and the present invention is only defined by the scope of the claims. The same reference numerals refer to the same components throughout the specification.

At this time, it will be understood that each block of the process flow chart diagrams and combinations of flow chart diagrams can be performed by computer program instructions. These computer program instructions may be mounted on a processor of a general purpose computer, special purpose computer, or other programmable data processing equipment, so that instructions performed through a processor of a computer or other programmable data processing equipment are described in flowchart block(s). It creates a means to perform functions. These computer program instructions can also be stored in computer readable or computer readable memory that can be oriented to a computer or other programmable data processing equipment to implement a function in a particular way, so that computer readable or computer readable memory It is also possible for the instructions stored in to produce an article of manufacture containing instructions means for performing the functions described in the flowchart block(s). Computer program instructions can also be mounted on a computer or other programmable data processing equipment, so a series of operational steps are performed on a computer or other programmable data processing equipment to create a process that is executed by the computer to generate a computer or other programmable data. It is also possible for instructions to perform processing equipment to provide steps for executing the functions described in the flowchart block(s).

Also, each block may represent a module, segment, or portion of code that includes one or more executable instructions for executing the specified logical function(s). It should also be noted that in some alternative implementations, it is also possible that the functions mentioned in the blocks occur out of sequence. For example, two blocks shown in succession may in fact be executed substantially simultaneously, or it is also possible that the blocks are sometimes executed in reverse order according to a corresponding function.

At this time, the term'~ unit' used in this embodiment means software or hardware components such as a field-programmable gate array (FPGA) or an application specific integrated circuit (ASIC), and'~ unit' has a certain role. Perform them. However,'~ wealth' is not limited to software or hardware. The'~ unit' may be configured to be in an addressable storage medium or may be configured to reproduce one or more processors. Thus, as an example,'~ unit' refers to components such as software components, object-oriented software components, class components, and task components, processes, functions, attributes, and procedures. , Subroutines, segments of program code, drivers, firmware, microcode, circuitry, data, database, data structures, tables, arrays, and variables. The functions provided within components and'~units' may be combined into a smaller number of components and'~units', or further separated into additional components and'~units'. In addition, the components and'~ unit' may be implemented to play one or more CPUs in the device or secure multimedia card.

In describing the embodiments of the present invention in detail, an example of a specific system will be the main target, but the main subject matter to be claimed herein is the scope disclosed herein in other communication systems and services having a similar technical background. It can be applied to the extent that it does not deviate greatly, and this will be possible at the judgment of a person having technical skills skilled in the art.

Hereinafter, the present invention relates to a device for diagnosing the state of a battery, and to a device capable of diagnosing the state of a battery using an impedance spectrum while having portability.

From the user's point of view, they will be interested in two battery states. One is the state of charge (SoC), which indicates how much energy is stored in the battery, and the other is the state of health (SoH) that predicts how much more battery can be used. to be. In general, it measures the time, temperature, and voltage required while repetitively charging and discharging, and uses this as a standard for evaluating the battery condition. However, there is a limitation that the voltage alone cannot reflect the detailed characteristics of the battery.

Accordingly, the present invention is to propose a method for diagnosing a condition using impedance. Impedance is interpreted as a cause of impeding electrical transmission when a chemical reaction (eg, oxidation-reduction reaction) occurs at the electrode, and impedance spectroscopy (BS) can be used to perform battery analysis accurately and quickly.

The relationship between battery characteristics and impedance is as follows. The electrochemical process inside the battery can be represented by an electrical model as shown in FIG. 1.

1 is an example of an electrical model of a battery. Referring to FIG. 1, the battery includes an anode 102, double sides 104a, 104b, an ion electrolyte 106, and a cathode 108. The electrical model shown in FIG. 1 is composed of several components, that is, a resistor, a capacitor, an inductor, and a time delay device, and has a complex and nonlinear characteristic. Therefore, to substantially analyze the battery, the simplified impedance model of FIG. 2 is used.

2 is an example of a simplified battery impedance model. Referring to Figure 2, the impedance model is composed of U ₀ (202), Rs (204), Rp (206), Cp (208). In Figure 2, Z stands for the synthesis impedance of the battery, the impedance consists of _real and imaginary real number R R _imag. Rs means the ohm resistance of the inside of the battery (electrode, electrolyte), and the larger the cycle of voltage/current change, the more dominant the battery characteristics are. In addition, in FIG. 2, Rp is an electrochemical reaction rate in a battery, Cp is a capacitor function by an electric double layer between an electrode and an electrolyte. Therefore, Rp and Cp serve as criteria for indicating the state of charge (SoC) of the battery. As the performance of the battery decreases due to the aging phenomenon of the battery, the Rs value increases. Therefore, Rs can be used as a criterion for determining the SoH of the battery.

3 is an example of a change in battery impedance according to frequency. 3 is a Nyquist diagram for the impedance of the battery. In the case of a lithium-ion (Li-ion) battery, as shown in Fig. 3, the internal resistance Rs at the point where the graph intersects the real axis is called an alternating current (AC) resistance. Referring to FIG. 3, Rs is detected around 1 kHz. Since the relationship between Rs and SoH is relatively different depending on the type, size, and shape of the battery, the method of continuously updating the correlation between Rs and SoH while defining and using evaluation criteria by preliminarily researching the same type of battery is demonstrated. Can be used. At this time, since the impedance of the battery reacts relatively sensitively with temperature, it is preferable that temperature correction is applied to obtain an accurate analysis result.

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FIG. 4 is an example of Rs change of a new lithium ion battery and an old battery. Referring to FIG. 4, as the aging phenomenon increases, it can be seen that the Rs value of the battery moves to the right, that is, increases.

5 is an example of an impedance that varies depending on a state of charge of a lithium ion battery. Referring to FIG. 5, it can be seen that as the discharge deepened, the DC resistance Rp increased.

6 is an example of a relationship between an SoC of a lithium ion battery and an imaginary component of impedance. 7 is an example of classification of a state of a battery according to an impedance form of frequency characteristics. By the classification as shown in FIG. 7, in addition to the SoC and SoH states of the battery, the damaged battery may be screened through the impedance shape of the frequency characteristic.

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Impedance spectrum analysis equipment according to an embodiment of the present invention has the following features.

Battery condition diagnosis equipment with frequency-dependent impedance analysis provides a basis for quickly evaluating battery condition. The AC characteristic measured at a frequency of about 1 kHz evaluates the aging state of the battery, and the direct current (DC) characteristic measured at a low frequency (eg, about 1 Hz) can be used to determine the state of charge of the battery. The advantages of the battery condition diagnosis technique based on impedance measurement are as follows.

-Rapid quality inspection

-Fast and accurate battery diagnosis

-Damaged batteries

-Maximized battery life with charging method optimized for battery condition

-Accurate prediction of battery mileage/use time through accurate charging status

-Remaining life prediction even during battery

8 is a configuration diagram of a battery diagnostic equipment 800 according to an embodiment of the present invention.

Referring to FIG. 8, the battery diagnostic equipment 800 includes a charging circuit 802, an internal battery 804, an analog to digital convertor (ADC) 806, a power switch 808, a boosting circuit 810, and a communication unit ( 812), a measurement unit 814, a display unit 816, and a control unit 818.

The charging circuit 802 receives power from an external power source 830 to provide power required for the internal battery 804, the ADC 806, the power switch 808, and the like. For example, the power of the external power source 830 may be 5V, 12V, 110V, or 220V. To this end, the charging circuit 802 is a terminal for connecting a power cable (eg, an outlet terminal, a terminal of the Korea Information and Communication Technology Association (TTA) standard, a Universal Serial Bus (USB) terminal, and/or used in related industries A normal charging terminal, etc.), and converts the power supplied from the external power source 830 into voltage, current, and power corresponding to various configurations of the internal battery 804 or the battery diagnostic equipment 800. It may include (or may be implemented by the boosting circuit 810 described below).

The internal battery 804 supplies power necessary for the operation of the battery diagnostic equipment 800. The internal battery 804 is charged using the current provided from the charging circuit 802, and supplies power for operation of other components when the external power source 830 is not connected. For example, the internal battery 804 may be a 3.7V lithium ion battery. The ADC 806 calculates the remaining amount of the internal battery 804, and provides the calculation result to the control unit 818.

The power switch 808 controls the state of whether to apply the power signal provided from the charging circuit 802 to the display unit 816. When the power switch 808 is in the on state, power is applied to the display unit 816, and when it is in the off state, power is not applied to the display unit 816. However, regardless of whether or not power is supplied to the display unit 816, charging of the internal battery 804 is possible.

The step-up circuit 810 converts the power supplied through the power switch 808 into a power supply of voltage required for operation of other components such as 5V, 12V, 110V, and 220V. The converted power signals are provided to the communication unit 812, the measurement unit 814, the display unit 816, the control unit 818, and the like.

The communication unit 812 performs a function for the battery diagnostic equipment to communicate with the inside or outside. The communication unit 812 includes an interface for accessing an external communication network (eg, an Internet network).

For example, the communication unit 812 may include hardware and/or software that transmits and receives various data, signals, and information to and from external devices. In addition, the communication unit 812 may include a wireless communication module (eg, a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module (eg, a local area network (LAN) communication module, or Power line communication module). In addition, the communication unit 812 may include a first network (eg, a short-range communication network such as Bluetooth, WiFi direct, or an Infrared Data Association (IrDA)) or a second network (eg, a cellular network, the Internet, or a computer network (eg, LAN or WAN). ) Can communicate with external electronic devices. These various types of communication modules may be integrated into a single component (eg, a single chip), or may be implemented as a plurality of separate components (eg, multiple chips).

As another example, the communication unit 812 may include a cable connection port for wired communication. As a specific example, the communication unit 812 is a port for exchanging data with an external device, and may include a TTL (Transistor-Transistor Logic) to RS232 (Recommended Serial 232) circuit. RS232 is one of the standards introduced in 1960, and is a serial interface that connects a PC, an acoustic coupler, and a modem. The RS232 interface is also referred to as a port and is commonly referred to as a serial port.

The measurement unit 814 checks the state of the external battery 840 to be measured. The measurement unit 814 may check the state of the external battery 840 based on the principles as described with reference to FIGS. 1 to 7. For example, the measurement unit 814 may measure the time, temperature, and voltage required while charging/discharging the external battery 840. Also, the measurement unit 814 may measure the impedance of the external battery 840 (eg, internal resistance, AC resistance, DC resistance). Although not shown in FIG. 8, the measurement unit 814 may include at least one terminal for connecting a measurement cable for measurement of the external battery 840 to be measured. For example, at least one terminal is FORCE+. It can be named as FORCE-, Pt1000, Shield, SENSE-, SENSE+, etc.

The display unit 816 displays the measurement result of the battery state performed by the measurement unit 814 in a visual form under the control of the control unit 818. For example, the display unit 816 displays numerical values of parameters (eg, internal resistance values, Rs, Rp, Cp) that symbolize battery characteristics, or displays a characteristic graph (eg, Nyquist diagram, impedance spectrum). , Other quantitative or qualitative performance indicators (e.g., whether the impedance falls within the allowable range at a specific frequency, evaluation of the battery status SoC or SoH, etc.) can be displayed in various ways. To this end, the display unit 816 may include a liquid crystal display (LCD) panel and an LCD main board. Examples of screens displayed on the display unit 816 will be described in more detail below. Also, the display unit 816 may be a touch screen, and in this case, the display unit 816 may recognize a user's touch input. That is, the display unit 816 may further have a function as an input means.

The control unit 818 controls the overall operation of the battery diagnostic equipment. To this end, the control unit 818 includes at least one processor. For example, the control unit 818 may receive data on a measurement result (eg, a physical value) from the measurement unit 814 and analyze the measurement result to diagnose the battery state. When analyzing the measurement result, the type of the battery to be measured may be further considered. In addition, the control unit 818 may configure a screen that displays information about a value measured by the measurement unit 814 or a state analyzed by the control unit 818, and controls the screen to be displayed on the display unit 816. have. In addition, the control unit 818 may convert data on measurement and analysis results into files that can be read by external transmission and external devices (eg, csv, text, xls, etc.). Here, the file may be transferred to the outside through a memory card slot (not shown).

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9A to 9V are examples of screens displayed on the display unit 816 of the battery diagnostic equipment according to an embodiment of the present invention. Through the display unit 816, various information such as the state of the battery diagnosis equipment, information about the measured battery, a user interface for selecting a function, and setting information may be displayed.

For example, a menu selection screen as in FIG. 9A, a software version display as in FIG. 9B, a resistance as in FIG. 9C (e.g., ACIR (alternative current internal resistance), DCIR (direct current internal resistance) monitoring screen), FIG. 9D The time/date setting screen such as can be displayed. In addition, a file management screen as shown in FIG. 9E, a file storage screen as shown in FIG. 9F (eg, saved as csv), a file list screen as shown in FIG. 9G, and a battery inspection history screen as shown in FIG. 9H may be displayed.

For example, a tolerance test screen as shown in FIG. 9i, a DCIR setting screen as shown in FIG. 9j, an ACIR setting screen as shown in FIG. 9k, and a tolerance test result screen as shown in FIG. 9l may be displayed. In addition, a numerical value input screen as shown in FIG. 9M and a character input screen as shown in FIG. 9N may be displayed.

For example, a result display setting menu as shown in FIG. 9o, a model setting screen as shown in FIG. 9p, a result graph screen as shown in FIG. 9q, and a display range setting screen as shown in FIG. 9r may be displayed. In addition, an ACIR, DCIR measurement result screen as shown in FIG. 9s, a battery test result screen as shown in FIG. 9T, and a test result notification screen as shown in FIG. 9U or 9V may be displayed.

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10 is a diagnostic procedure of a battery diagnostic equipment according to an embodiment of the present invention.

Referring to Figure 10, the battery diagnostic equipment performs a measurement operation (S1001). Subsequently, the battery diagnostic equipment generates measurement result data (S1002). Then, the battery diagnostic equipment displays and outputs the measurement result (S1003). Here, the display means to display the screen through the display unit 816, and the output means to generate a data file (eg, csv, txt, xls, etc.). For example, the battery diagnostic equipment may display measurement results using a screen such as at least one of FIGS. 9A to 9V.

As described above, the battery diagnostic equipment can diagnose and display the status of the battery. In this case, the battery diagnostic equipment may provide a diagnosis/measurement result to the user immediately by including a display means (eg, a display unit 816). In addition, the battery diagnostic apparatus can provide portability by including the internal battery 804.

Battery diagnostic equipment diagnoses the state of the battery using the measurement result (eg, impedance measurement result) of the battery. In addition to this, according to another embodiment of the present invention, environmental information about the current location where the battery and the battery diagnostic equipment exist may be further used. The state of the battery may vary depending on the current environment (eg, temperature, humidity, atmospheric pressure, etc.). Therefore, if it is possible to provide information about the environment to the battery diagnostic equipment, the battery diagnostic equipment may more accurately diagnose the condition of the battery based on the environmental information. In this case, the operation of the battery diagnostic equipment is shown in FIG. 11 below.

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11 is a diagnostic procedure of a battery diagnostic equipment based on environmental information according to another embodiment of the present invention.

Referring to FIG. 11, the battery diagnostic equipment accesses a server (S1101). Here, the server is a server that provides environment information, and may be connected through an external communication network. The server may be a server operated by a manufacturer/supplier of battery diagnostic equipment or a public server accessible to anyone (for example, the Korea Meteorological Administration website).

Subsequently, the battery diagnostic equipment collects environmental information (S1102). In other words, the battery diagnostic equipment requests environmental information from the server and receives environmental information from the server. At this time, in requesting environmental information, the battery diagnostic equipment provides current location information to the server. At this time, the location information is confirmed from a location measurement module (eg, a global positioning system (GPS) module) included in the battery diagnostic equipment, input from a user through a display unit, or interworking with another device (eg, a user's smartphone) Can be obtained through.

Thereafter, the battery diagnostic equipment performs measurement in consideration of environmental information (S1103). When measuring considering environmental information, the operation of obtaining a physical value from a battery to be measured may not be changed. However, in diagnosing the state of the battery from the obtained physical value, environmental information may be reflected.

For example, a mapping table representing a correspondence relationship between physical values and states may be applied differently according to environment information. In this case, the battery diagnostic equipment may store a plurality of mapping tables, and select and use an appropriate table according to the collected environmental information. For example, when temperature is included in the environment information, the battery diagnostic equipment may determine which range of the plurality of ranges the temperature value belongs to, and select and use a mapping table corresponding to the identified range.

As another example, environmental information can be used as a variable in a calculation formula for diagnosing a condition from a physical value. In this case, the battery diagnostic equipment may determine the state of the battery by extracting environmental values that indicate the environment from the environmental information, and substituting the extracted environmental values and physical values measured from the battery into the calculation formula.

As another example, at least some of the measured physical values based on environmental information may be compensated or corrected. In this case, the battery diagnostic equipment may convert the environmental information into a parameter for compensation, and then compensate the measured physical value according to a predefined compensation rule.

When using the environmental information as described above, there may be a case where a specific environmental value (eg, temperature, humidity, etc.) included in the environmental information is in a range in which the measured physical value is not reliable or cannot be compensated (eg. : Excessive high temperature or high humidity environment, etc.). The range of environmental values indicating an environment state in which such a physical value is unreliable may be defined as a'diagnostic range' in the present invention. That is, if the environmental value falls within the non-diagnostic range, the measured physical value is treated as unreliable. If the environmental value included in the collected environmental information falls within the diagnostic-disabled range, the battery diagnostic device may display an alarm indicating that diagnosis is not possible from the current measured value.

In this case, additionally, according to an embodiment of the present invention, the battery diagnostic equipment checks information about future environmental value changes at the corresponding location from an external server and then recommends to perform measurement again at a certain point in the future. Recommendations can be expressed. For example, the recommendation may specify when the date changed during the same time period of the day, or an appropriate time regardless of the date. Here, the designated time point means a time point when the corresponding environment value is out of the diagnostic inability range.

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As described above, in using the environment information, environment information may be collected from a portable device such as a smart phone held by a user, not an external server. For example, after establishing a connection with the user's portable device for diagnosis, the battery diagnostic device may receive environmental information measured from a sensor included in the portable device or environmental information received by the portable device from an external server. To this end, the battery diagnostic device may display a setting screen for establishing a connection with the user's portable device, and may require the user to input necessary information.

In addition, when a connection is established with the user's portable device, the battery diagnostic device displays the measurement and analysis results on the display unit 816 at the same time or as a replacement, so as to be displayed on display means provided on the user's portable device. And data on the analysis result to the user's portable device.

In addition, when a connection is established with the user's portable device, the battery diagnostic device may directly control various sensors provided in the user's portable device to collect necessary information. To this end, a dedicated application for interworking with the battery diagnostic device must be installed on the user's portable device, and the user's approval for the authority to use the sensor should be obtained. In this case, the battery diagnostic device may establish a connection with the user's portable device, check the list of available sensors, and select an appropriate measurement mode according to the combination of the confirmed sensors. For example, if a temperature sensor is available, the battery diagnosis apparatus may replace the operation of obtaining environmental information from an external server with a temperature measurement operation using the temperature sensor of the portable device. Similar measures can be applied to other types of sensors.

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The diagnostic device according to an embodiment of the present invention may be used for diagnosis of a lead acid battery as well as a lithium battery. In addition, the diagnostic device according to an embodiment of the present invention supports a user interface (UI) that can be easily accessed even in a mobile environment such as a smart phone. In addition, the diagnostic apparatus according to an embodiment of the present invention enables measurement and analysis results to be stored and transmitted in a comma-separated value (CSV) or text format, so that they can be used in an external document creation program such as EXCEL.

The diagnostic device according to an embodiment of the present invention may have at least one of the functions as shown in Table 1 below.

function Explanation Single Impedance Measurement of internal resistance (impedance) at a constant frequency Impedance Spectrum Measurement of internal resistance (impedance) in a certain frequency range Display the measured impedance as a Nyquist Diagram
Calculate model parameters (Rs, Rp, Cp) symbolizing battery characteristics Tolerance Test-Single Impedance Check if the impedance at a specific frequency is within the allowable range Tolerance Test-Model Parameter Examine whether the model parameters obtained through the impedance spectrum are within the allowable range Tolerance Test-Spectral Shape Check if the impedance spectrum is within the allowable spectrum range Diagnosis Test Comprehensive evaluation of battery status (SoC, SoH)

Battery diagnostic apparatus according to an embodiment of the present invention may be used for various purposes of battery testing.

For example, a battery diagnostic device can be used for conformance verification. Specifically, in order to select a battery suitable for a use purpose, it can be checked whether a sufficient profile is applied to a battery to be verified to provide a sufficient charge capacity.

As another example, a battery diagnostic device can be used for battery classification. In order to maximize the performance and life of the battery package, it is important to select and group battery cells having the same characteristics and conditions. SoH, SoC, impedance, etc. can be considered to evaluate the suitability of a battery combination.

As another example, a battery diagnostic device can be used for quality control. It is important to safely and efficiently operate the battery by managing the change in battery/package status by regularly checking the impedance characteristics. Through quality control, it is possible to predict the battery replacement time in advance.

As another example, the battery diagnostic device can be used for online diagnosis. By setting evaluation criteria, you can quickly and easily analyze the state of charge and aging of the battery online.

As another example, the battery diagnostic device may be used for A/S service diagnosis. Through a quick and precise diagnosis, the state of charge (SoC) and aging of the battery (SoH), as well as whether the battery is defective, can be revealed.

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The battery diagnostic equipment 800 operating as described above may be used in various industrial sites. At this time, depending on the environment used, various uses of the battery diagnostic equipment 800 are possible, an example of which is illustrated in FIG. 12 below.

12 is an example of using the battery diagnostic equipment 800 according to another embodiment of the present invention.

Referring to FIG. 12, an external battery 840 that is a diagnostic target is present in the building 1200. In addition, inside the building 1200, auxiliary equipment 1210 and a local beacon 1220 are installed. In the example of FIG. 12, only one auxiliary equipment 1210 and one local beacon 1220 are installed, but this is only a selection for convenience of drawing, and a plurality of auxiliary equipment and a plurality of local beacons are installed. Even in this case, the features of the present invention can be applied.

The local beacon 1220 is an electronic device installed at a specific location in the building 1200, including a processor and at least one communication unit, and other hardware (eg, power) to provide a function to assist the battery diagnostic device 800 Supply hardware, display hardware, relay communication hardware, and the like). In the case of the auxiliary equipment 1210, it is installed at a specific location in the building 1200 and performs the corresponding operation under the control of the local beacon 1220. In the present invention, the local beacon 1220 and the auxiliary equipment 1210 are devices that assist the battery diagnostic equipment 800, as an accessory or dedicated equipment of the battery diagnostic equipment 800, a user at an appropriate location within the building 1200 Can be installed by.

For the diagnosis of the external battery 840, the user enters the interior of the building 1200 with the battery diagnostic equipment 1220 according to an embodiment of the present invention having portability. Accordingly, the battery diagnostic equipment 1220 may recognize the existence of the local beacon 1220 and establish a connection with the local beacon 1220. To this end, the local beacon 1220 periodically broadcasts a signal informing its existence. For example, the broadcasted signal may include at least one of identification information and attribute information of the local beacon 1220. At this time, the connection may be established based on short-range communication technology such as wireless LAN and Bluetooth.

When the connection with the local beacon 1220 is established, the battery diagnostic equipment 800 sets an operation mode. When setting the operation mode, the battery diagnostic equipment 800 considers a function that can be assisted by the local beacon 1220. To this end, the battery diagnostic equipment 800 may receive information on assistable functions from the local beacon 1220. Information about the assistable function may be included in a broadcast signal informing of the existence, or may be included in a separate signal received during connection establishment or after connection establishment. For example, the assistable function is a function of providing sensing data/information (eg, temperature, humidity, noise level) that can be obtained and provided through the connected assistive device 1210, a function of supplying power, and a battery diagnostic device (800 It may include at least one of a function of supplementing or replacing the function of the display unit provided in ), and a function of collecting information from an external server. In consideration of the auxiliary functions supported by the local beacon 1220 among these auxiliary functions, the battery diagnostic equipment 800 may select and set an operation mode. Thereafter, the local beacon 1220 performs an auxiliary function according to the control of the battery diagnosis equipment 800, and the battery diagnosis equipment 800 diagnoses the external battery 840 by utilizing the auxiliary function according to the set operation mode. Perform. Here, some examples of auxiliary functions are as follows.

For example, when the auxiliary equipment 1210 is a sensor, the local beacon 1220 is the battery diagnostic equipment 800, and sensing data/information indicating environmental information inside the building 1200 obtained through the auxiliary equipment 1210. Can provide.

As another example, when the auxiliary equipment 1210 is a power supply, the local beacon 1220 may supply power to the battery diagnostic equipment 800. This may be useful when the remaining amount of the internal battery 804 of the battery diagnostic equipment 800 is insufficient.

As another example, when the auxiliary equipment 1210 is a display means, the local beacon 1220 may assist the display function of the battery diagnostic equipment 800. Specifically, the local beacon 1220 may display a screen to be displayed on the display unit 816 of the battery diagnostic equipment 800 through the auxiliary device 1222 which is a larger display means. At this time, the battery diagnostic equipment 800 may configure a screen different from the screen displayed on the display unit 816 according to the screen size of the auxiliary device 1222.

As another example, when the auxiliary equipment 1210 is a communication means accessible to an external network, the local beacon 1220 may collect and provide necessary information from an external server. For example, the necessary information may include at least one of environmental information, statistical information about battery diagnosis, and firmware update information of the battery diagnosis equipment 800.

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13 is a block diagram showing a management system according to an embodiment of the present invention.

Referring to FIG. 13, the present invention proposes a management system 1300 that controls or monitors the battery diagnostic equipment 800 of FIG. 8, wherein the management system 1300 includes a management server 1310 and a user terminal 1320. , And/or battery diagnostic equipment 800.

In addition, the management server 1310 may include a first control module 1410, a first communication module 1420, a first input module 1430, and/or a first output module 1440, and a user terminal ( 1320 may include a second control module 1460, a second communication module 1470, and a second input module 1480 (not shown).

The control modules 1410 and 1460 may directly or indirectly control the management server 1310 and/or the user terminal 1320 to implement an operation/step/process according to an embodiment of the present invention. Also, the control modules 1410 and 1460 may include at least one processor, and the processor may include at least one central processing unit (CPU) and/or at least one graphics processing device (GPU).

The communication modules 1420 and 1470 may transmit and receive various data, signals, and information, such as the management server 1310 and/or the user terminal 1320. Further, the communication modules 1420 and 1470 may include wireless communication modules (eg, cellular communication modules, short-range wireless communication modules, or global navigation satellite system (GNSS) communication modules) or wired communication modules (eg, local area network (LAN) communication). Module, or power line communication module). Also, the communication modules 1420 and 1470 may include a first network (eg, a short-range communication network such as Bluetooth, WiFi direct, or an infrared data association (IrDA)) or a second network (eg, a cellular network, the Internet, or a computer network). It may communicate with an external electronic device through a telecommunication network (such as LAN or WAN). These various types of communication modules may be integrated into a single component (eg, a single chip), or may be implemented as a plurality of separate components (eg, multiple chips).

The input modules 1430 and 1480 manage commands or data to be used in the management server 1310 and/or components of the user terminal 1320 (eg, control modules 1410 and 1460) and/or the management server 1310 and/or It may be received from the outside of the user terminal 1320 (eg, a user (eg, a first user, a second user, etc.), an administrator of the management server 1310, etc.). Also, the input modules 1430 and 1480 may include a touch recognition display installed on a charging device 1310, a management server 1320, and/or a user terminal 1320, a touch pad, a button type recognition module, a voice recognition sensor, a microphone, And a mouse or a keyboard. Here, the touch-recognizable display, the touch pad, and the button-type recognition module may recognize a touch through the user's body (eg, finger) through a pressure-sensitive and/or capacitive method.

The output modules 1440 and 1490 are signals generated by the management server 1310 and/or the control modules 1410 and 1460 of the user terminal 1320 or acquired through the communication modules 1420 and 1470 (eg, voice signals) ), information, data, images, and/or modules that display various objects. For example, the output modules 1440 and 1490 may include a display, a screen, a display unit, a speaker, and/or a light emitting device (eg, LED lamp).

In addition, the management server 1310 may further include a storage module 1450, wherein the storage module 1450 is a basic program, an application program for operation of the management server 1310 and/or the user terminal 1320, Data such as setting information can be stored. In addition, the storage module is a flash memory type (Flash Memory Type), hard disk type (Hard Disk Type), multimedia card micro type (Multimedia Card Micro Type), card type memory (for example, SD or XD memory, etc.), Magnetic Memory, Magnetic Disk, Optical Disk, Random Access Memory (RAM), Static Random Access Memory (SRAM), Read-Only Memory (ROM), Programmable Read-Only Memory (PROM), Electrically Erasable Programmable Read (EPMROM) -Only Memory).

In addition, the storage module may include personal information of a user who uses the management server 1310 and/or the user terminal 1320. Here, the personal information may include a name, an ID (ID), a password, a street name address, a phone number, a mobile phone number, and/or an email address. In addition, the control modules 1410 and 1460 may perform various operations using various programs, contents, and data stored in the storage module 1450.

And, as described above, the present invention may also include features for the case where a plurality of local beacons are installed in the building 1200 as follows. At this time, the management server 1310 (and/or the control module 1410) includes a first threshold value for residual power of the internal battery 804 installed in the battery diagnostic equipment 800, and a first lower threshold value than the first threshold value. 2 thresholds can be set (eg, first threshold-60%, second threshold-25%).

For example, when the information indicating the residual power of the internal battery 804 (that is, the residual power information) indicates power higher than the first threshold, the management server 1310 displays the battery diagnostic equipment 800. It can be controlled to operate as the first operation mode. Here, in the case of the first operation mode, the battery diagnostic equipment 800 may perform different operations based on a plurality of information received from a plurality of local beacons and/or a plurality of auxiliary equipment. At this time, each of the information received from the plurality of local beacons and/or the plurality of auxiliary equipment may include information indicating the measurement temperature and/or measurement humidity inside the building 1200. As an example, the measurement unit 814 of the first operation mode of the battery diagnostic equipment 800 may further consider information indicating an average measurement temperature and/or average measurement humidity inside the building 1200 to the external battery 840. It is possible to obtain status information (eg, charge rate) for the aging or to determine the aging state of the external battery 840.

In addition, when the residual power information indicating the residual power of the internal battery 804 indicates power that is less than the first threshold and is greater than or equal to the second threshold, the management server 1310 displays the second battery diagnostic equipment 800. It can be controlled to operate as an operation mode. Here, in the case of the second operation mode, the battery diagnostic equipment 800 may perform different operations based on information received from one local beacon 1220 and/or one auxiliary equipment 1210. In this case, the information received from the one local beacon 1220 and/or one auxiliary equipment 1210 may include information indicating the real-time measurement temperature and/or real-time measurement humidity inside the building 1200. For example, the measurement unit 814 of the first operation mode of the battery diagnostic equipment 800 considers the information indicating the measurement temperature and/or measurement humidity inside the building 1200, and the status of the external battery 840 Information (eg, charge rate) may be obtained or the aging state of the external battery 840 may be determined. The second operation mode may be implemented as a low power mode compared to the first mode.

In addition, when the residual power information indicating the residual power of the internal battery 804 indicates power that is less than the second threshold and is greater than or equal to the third threshold, the management server 1310 may cause the battery diagnostic equipment 800 to third It can be controlled to operate as an operation mode. Here, in the case of the third operation mode, the battery diagnosis equipment 800 does not perform communication with the local beacon 1220 and/or the auxiliary equipment 1210, and information (and/or signals) acquired internally by the battery diagnosis equipment 800 ), it is possible to obtain status information (eg, charge rate) of the external battery 840 based on only or determine the aging state of the external battery 840. As described above, the battery diagnosis equipment 800 implemented in the third operation mode omits the process of performing communication with the local beacon 1220 and/or the auxiliary equipment 1210, and thus, as a low power mode compared to other modes. Can be implemented.

Meanwhile, in relation to the second operation mode, the battery diagnostic equipment 800 selects one specific local beacon 1220 and one specific auxiliary equipment 1210 from among the plurality of local beacons and the plurality of auxiliary equipments. Can.

For example, the battery diagnostic equipment 800 may provide information regarding a first reference signal, a specific signal strength, frequency, length, time, etc. to each of a plurality of local beacons and a plurality of auxiliary equipments. And the plurality of local beacons in response to the first reference signal, and the plurality of local beacons based on the first response signal returned by each of the plurality of local beacons and the plurality of auxiliary devices. And a specific local beacon 1220 and a specific auxiliary equipment 1210 from among a plurality of auxiliary equipment.

For example, the battery diagnostic equipment 800 and/or the management server 1310 may include i) a first time (or a second time) during which the first reference signal is actually transmitted from the communication unit 812 of the battery diagnostic equipment 800. 1 transmission time), and ii) each of the plurality of local beacons and the plurality of auxiliary equipments respectively transmits a first reference signal to the plurality of local beacons and a plurality of auxiliary equipments of each transceiver (and/or antenna). ), information indicating the second time (or the first reception time), which is the time received, may be received from each of the plurality of local beacons and the plurality of auxiliary devices. In addition, the battery diagnostic equipment 800 and/or the management server 1310, iii) each of the plurality of local beacons and the plurality of auxiliary equipments transmits to the battery diagnostic equipment 800 in response to the first reference signal. Information indicating a third time (or second transmission time) that is a time may be received from each of the plurality of local beacons and the plurality of auxiliary devices. In addition, the battery diagnostic equipment 800 and/or the management server 1310 receives the second reference signal, and the time at which the second reference signal is received by the communication unit 812 is a fourth time (or second reception). Time).

The difference between the first time (or the first transmission time) and the second time (or the first reception time) (the first time difference or the first difference), the third time (or the second transmission time) and the fourth The difference between the time (or the second reception time) (the second time difference or the second difference) is a propagation delay generated according to the distance between the battery diagnostic device 800 and each of the plurality of local beacons and the plurality of auxiliary devices ( It may be a time indicating a time difference caused by propagation delay (eg, a difference between a time point transmitted from a transmitter and a time point received at a receiver, a difference between a time point received at a receiver and a time point transmitted at a transmitter).

In addition, the battery diagnostic equipment 800 and/or the management server 1310 may include a plurality of the local beacons in which the first time difference is less than the first time threshold and/or the second time difference is small in the second time difference. Any one of the specific local beacon 1220 and any one of the specific auxiliary equipment 1210 may be selected from among the auxiliary equipment. In addition, when there are a plurality of local beacons and/or auxiliary devices in which the first time difference is less than the first time threshold and/or the second time difference is small in the second time threshold, the battery diagnostic equipment 800 and/or Alternatively, an entity (local beacon and/or auxiliary equipment) having the highest number (number of times) of the history of performing communication with the management server 1310 may be selected.

Selected through such a process i) the entity (entity) (local beacon or auxiliary equipment) or ii) based on any one specific local beacon 1220 and any specific auxiliary equipment 1210 described above Two operating modes can be implemented.

In addition, implementing the second operation mode based on the entity having the first time difference and the second time difference, the higher the communication output is required as the communication with the far-off entity is performed. In this case, the power consumption is also reduced. Considering that it may increase. Therefore, the second operation mode may be regarded as a low power mode compared to the first operation mode that does not include the above-described process and performs communication with a plurality of entities.

As such, various embodiments of the present invention can be implemented as computer readable code in a computer readable recording medium from a specific point of view. A computer readable recording medium is any data storage device capable of storing data that can be read by a computer system. Examples of computer readable recording media include read only memory (ROM), random access memory (RAM), and compact disk-read only memory (CD-ROM). ), magnetic tapes, floppy disks, optical data storage devices, and carrier waves (such as data transmission over the Internet). The computer readable recording medium can also be distributed over network coupled computer systems, so that the computer readable code is stored and executed in a distributed fashion. In addition, functional programs, codes, and code segments for achieving various embodiments of the present invention can be easily interpreted by programmers skilled in the field to which the present invention is applied.

It will also be appreciated that the apparatus and method according to various embodiments of the present invention are feasible in the form of hardware, software or a combination of hardware and software. Such software may be, for example, volatile or non-volatile storage, such as a storage device such as a ROM, or memory, such as a RAM, memory chip, device or integrated circuit, regardless of whether it is erasable or rewritable, or For example, it may be optically or magnetically recordable, such as a compact disk (CD), DVD, magnetic disk, or magnetic tape, and may be stored in a storage medium readable by a machine (eg, a computer). The method according to various embodiments of the present invention may be implemented by a computer or portable terminal including a control unit (control module 1410) and a memory, and the memory includes instructions for implementing embodiments of the present invention. It will be appreciated that this is an example of a machine-readable storage medium suitable for storing a program or programs.

Accordingly, the present invention includes a program comprising code for implementing the apparatus or method described in the claims of this specification and a storage medium readable by a machine (computer, etc.) storing the program. In addition, such a program can be transferred electronically through any medium, such as a communication signal carried over a wired or wireless connection, and the present invention suitably includes this equivalent.

The embodiments of the present invention disclosed in the present specification and drawings merely describe the technical content of the present invention and provide specific examples to help understanding of the present invention, and are not intended to limit the scope of the present invention. In addition, the above-described embodiments according to the present invention are merely exemplary, and those skilled in the art will understand that various modifications and equivalent ranges of the embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be defined by the following claims.

Claims (5)

Battery to be measured;
A battery including an internal battery for supplying power, measuring impedance related to the battery to be measured, diagnosing the state of the battery to be measured, and displaying information indicating the impedance and information indicating the state of the battery to be measured Diagnostic device;
An external server for operating a website of the Korea Meteorological Administration, a meteorological agency server that predicts environmental information including a first temperature and a first humidity corresponding to the location information of the battery diagnostic device and controls the display to be displayed on the Korea Meteorological Agency homepage;
A plurality of auxiliary equipment for obtaining sensing information regarding a second temperature, second humidity and noise measured by a sensor installed inside the building where the battery to be measured is located; And
A plurality of local beacons receiving the sensing information from the auxiliary equipment; And
When receiving information indicating the residual power of the internal battery from the battery diagnostic apparatus, and when the residual power of the internal battery is greater than or equal to a first threshold, the battery diagnostic apparatus is set to a first operation mode, and the residual power of the internal battery If it is less than the first threshold and is greater than or equal to the second threshold, the battery diagnostic apparatus is set to a second operation mode, and when the residual power of the internal battery is less than the second threshold, the battery diagnostic apparatus is operated in a third operation mode. Management server set to; Including,
The battery diagnostic device,
The signal for requesting the environment information and the location information of the battery diagnosis apparatus are transmitted to the weather station server through the plurality of auxiliary equipment and the plurality of local beacons,
The environment information based on the location information is received from the weather station server through the plurality of auxiliary equipment and the plurality of local beacons,
When the first operation mode is set, the sensing information is received from the plurality of local beacons, and the state of the battery to be measured is determined based on the impedance, the environment information, and sensing information received from the plurality of local beacons. Diagnose,
When the second operation mode is set, the sensing information is received from one of the local beacons of the plurality of local beacons, and based on the impedance, the environment information, and the sensing information received from the one of the local beacons. Diagnose the state of the battery to be measured,
When set to the third operation mode, characterized in that for diagnosing the state of the battery to be measured based on the impedance,
system. According to claim 1,
The battery diagnostic device,
The impedance spectrum of the battery to be measured is measured,
Characterized in that measuring at least one of an AC (alternative current) resistance value and a DC (direct current) resistance value of the battery to be measured,
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