Mobile battery diagnosis device and electric vehicle battery diagnosis method using same

Abstract

Provided are a battery diagnosis device capable of improving the accuracy of battery diagnosis while facilitating portability, and an impedance-based mobile battery state diagnosis method capable of quickly diagnosing a state of an electric vehicle battery and determining whether to reuse the battery. The battery diagnosis device according to an aspect of the present invention includes: a battery diagnosis module configured to diagnose a battery; and a carrier module detachably supporting the battery diagnosis module and configured to be movable. The electric vehicle battery diagnosis method using the mobile battery diagnosis device according to an aspect of the present invention includes the steps of: performing a customized connection method according to whether an electric vehicle battery is detached or whether a cover is disassembled and then acquiring impedance data of the electric vehicle battery; diagnosing a state of the electric vehicle battery using the measured impedance to generate battery state information; and providing the generated battery state information to a user.

Description

Mobile battery diagnostic device and electric vehicle battery diagnostic method using the same

[0001] The present invention relates to a portable battery diagnosis device and an electric vehicle battery diagnosis method using the same, and more particularly, to a battery diagnosis device that is easy to carry and can improve the accuracy of battery diagnosis, and an impedance-based portable battery status diagnosis method that can quickly diagnose the status of an electric vehicle battery and determine whether or not to reuse it.

[0002] Batteries, which are easy to apply to various product groups and have electrical characteristics such as high energy density, are also called accumulators or secondary batteries. In addition to their primary advantage of reducing the use of fossil fuels, they are attracting attention as a new energy source for environmental friendliness and energy efficiency enhancement because they do not generate any byproducts from energy use.

[0003] Therefore, batteries are widely used in electric vehicles (EVs) and energy storage systems (ESSs) driven by electric power sources, including mobile devices, and research and development on battery management systems (BMSs), battery balancing circuits, and switching circuits are actively being conducted for more efficient battery management.

[0004] In particular, BMS can manage the battery's remaining capacity (State Of Charging, SOC), remaining life (State Of Health, SOH), maximum input / output power allowance, output voltage, etc. by using the battery's status information, and among these, the technology for predicting the battery's life and estimating the replacement time is becoming a key technology for more stable system operation.

[0005] Meanwhile, with the recent rapid increase in the number of devices using batteries, including electric vehicles, research on diagnostic devices capable of periodically diagnosing batteries is increasing to ensure the safety of battery-equipped electric vehicles.

[0006] However, conventional diagnostic devices have the problem of poor portability, and even if portability is secured, the accuracy of battery diagnosis is low.

[0007] Electric vehicles primarily rely on secondary batteries as their power source. Lithium-ion batteries, in particular, are widely used due to their higher energy density, higher operating voltage, and relatively larger charge capacity compared to conventional batteries. However, these batteries face a risk of explosion and other accidents due to their reduced durability as they are repeatedly charged and discharged. Furthermore, repeated charging and discharging reduces their charge capacity, shortening their operating time.

[0008] Secondary batteries can lose their function as secondary batteries due to abnormal use, such as over-discharging or over-charging. However, even under normal use, their charge capacity, which is their ability to store electrical energy, gradually decreases with the number of charges and discharges, and their durability also decreases, posing a risk of accidents such as explosions. Therefore, in order to be suitable for their original purpose, secondary batteries must be used until they lose the minimum functions required as secondary batteries for that purpose, and if they lose those functions, they must be replaced with new secondary batteries. Typically, in the case of electric vehicles, when the capacity of a secondary battery decreases to 80% to 50% of its initial capacity, it must be replaced due to operational issues such as reduced driving range, slow charging speed, and increased safety risks.

[0009] These replacement battery packs retain approximately 80% of their capacity, allowing them to be reused as electric vehicle batteries depending on factors such as their remaining lifespan and battery health. They can also be repurposed for purposes other than electric vehicle batteries, such as energy storage systems (ESS), through repurposing. For example, used electric vehicle batteries can be reused in renewable energy ESS, industrial ESS, home ESS, or uninterruptible power supplies (UPS).

[0010] However, most existing battery diagnostic methods require a charge / discharge cycle to assess battery performance, which is time-consuming and cumbersome because the battery must be removed from the system. Furthermore, the indirect measurement method often results in poor accuracy. In particular, for high-voltage batteries, the diagnostic process poses a risk of safety issues.

[0011] (Patent Document 1) Korean Patent No. 10-2670146

[0012] The present invention has been devised to solve the above-mentioned problems, and its purpose is to provide a battery diagnosis device that is easy to carry and can increase the accuracy of battery diagnosis.

[0013] In addition, the present invention aims to provide a device and method for quickly diagnosing the status of a removed battery or an onboard battery of an electric vehicle without a separate battery charging / discharging process.

[0014] However, the technical problems to be solved by the present invention are not limited to the problems described above, and other problems not mentioned can be clearly understood by those skilled in the art from the description of the invention described below.

[0015] A battery diagnostic device according to one aspect of the present invention includes a battery diagnostic module configured to diagnose a battery and a carrier module configured to detachably support the battery diagnostic module and to be movable.

[0016] Preferably, the battery diagnostic module may include a diagnostic module body detachably coupled to the carrier module and a battery diagnostic unit provided inside the diagnostic module body and configured to be connected to the battery and diagnose the battery.

[0017] Preferably, the diagnostic module body may include a terminal connection part provided on the upper side of the diagnostic module body, connected to the battery diagnostic part, and connected to the battery and the measurement part through a grip part provided on the upper side of the diagnostic module body and configured in a form that can be gripped by a user, and an opening part configured to open and close a part of the diagnostic module body where the terminal connection part is provided.

[0018] Preferably, the carrier module includes a carrier body including a mounting portion on which the diagnostic module body is mounted, a moving portion provided at the lower end of the carrier body and configured to move the carrier body, and a diagnostic module fixing portion provided on the carrier body and connected to a fixed connection portion of the diagnostic module body to fix the diagnostic module body to the mounting portion, and the diagnostic module fixing portion may be configured to fix the diagnostic module body to the mounting portion with the terminal connection portion facing upward.

[0019] Preferably, the carrier module further includes a friction prevention unit provided on the mounting portion to prevent friction between the diagnostic module body and the mounting portion that occurs when the diagnostic module body is mounted on the mounting portion, and the friction prevention unit may be provided on at least one of a corner portion of a first surface of the mounting portion that is in contact with a side surface of the diagnostic module body and a corner portion of a second surface of the mounting portion that is connected in a direction perpendicular to the first surface of the mounting portion and is in contact with the lower side of the diagnostic module body.

[0020] Preferably, the carrier body may further include a measuring component receiving portion that receives the measuring component therein.

[0021] Preferably, the carrier module may further include a diagnostic module guide configured to support the diagnostic module body when the battery diagnostic module is connected to the battery.

[0022] Preferably, the mounting portion includes a first surface that comes into contact with a side surface of the diagnostic module body when the diagnostic module body is mounted on the mounting portion, a second surface that is connected in a direction perpendicular to the first surface and comes into contact with a lower surface of the diagnostic module body when the diagnostic module body is mounted on the mounting portion, and a fixing groove portion provided in an area where the first surface and the second surface meet, and the diagnostic module guide portion may include an inclined main body portion on which the battery diagnostic module is mounted and an end portion is coupled to the fixing groove portion and is disposed to be inclined with respect to the second surface.

[0023] Preferably, the carrier module further includes a friction prevention portion provided on the mounting portion and configured to prevent friction between the diagnostic module body and the mounting portion that occurs when the diagnostic module body is mounted on the mounting portion, and the diagnostic module guide portion may further include an inclined support portion configured to support a lower portion of the inclined main body portion by being coupled to the friction prevention portion provided on the edge portion of the second surface.

[0024] Preferably, the carrier module may further include a diagnostic module buffer portion, one end of which is connected to the diagnostic module fixing portion, the other end of which is connected to the fixing connection portion, and configured to elastically support the diagnostic module body relative to the carrier body.

[0025] Preferably, the diagnostic module fixing part may include a first fixing part provided on the carrier body and a second fixing part provided on the carrier body and disposed below the first fixing part, the fixing connection part may include a first connection part provided on the diagnostic module body and connected to the first fixing part, and a second connection part provided on the diagnostic module body and disposed below the first connection part and connected to the second fixing part, and the diagnostic module buffer part may include a first buffer part having one end coupled to the first fixing part and the other end connected to the second connection part to elastically support the lower side of the diagnostic module body relative to the upper side of the carrier body, and a second buffer part having one end coupled to the second fixing part and the other end connected to the first connection part to elastically support the upper side of the diagnostic module body relative to the lower side of the carrier body.

[0026] Preferably, the battery diagnostic module further includes a measuring component guide portion configured to support at least a portion of a measuring component connected between the battery and the terminal connection portion by being coupled to the opening portion, and the measuring component guide portion may include a coupling portion coupled to an inner surface of the opening portion and a folding portion connected to the coupling portion and positioned inside the diagnostic module body in a multi-folded state when the opening portion is closed, and configured to unfold and support a lower end of the measuring component when the opening portion is opened.

[0027] A battery diagnosis method using a mobile battery diagnosis device according to one aspect of the present invention includes a step of performing a customized connection method depending on whether an electric vehicle battery is detached or removed and whether a cover is removed, and then acquiring impedance data of an electric vehicle battery, a step of diagnosing the state of the electric vehicle battery using the measured impedance to generate battery state information, and a step of providing the generated battery state information to a user.

[0028] Preferably, a method for customizing a battery connection for an electric vehicle according to one embodiment may provide a method for connecting a battery using a charging terminal of an electric vehicle while the battery is installed on-board the electric vehicle, a method for connecting a battery at the bottom of the electric vehicle using any one of a high-voltage connector, a BMS connector, and a manufacturer connector, a method for connecting a battery removed from the electric vehicle using any one of a high-voltage connector, a BMS connector, and a manufacturer connector, and a method for connecting a battery removed from the electric vehicle using an internal connection terminal and connector after removing the cover of the battery.

[0029] Preferably, the step of acquiring impedance data of an electric vehicle battery according to one embodiment is characterized by acquiring data generated from the electric vehicle battery through a BMS and OBD terminal of the electric vehicle or the battery of the electric vehicle, and the data of the battery can be acquired through impedance measurement, insulation resistance measurement, DC-IR measurement, and AC-IR measurement.

[0030] Preferably, the step of generating electric vehicle battery status information according to one embodiment may provide a step of obtaining a user input for inputting a type of electric vehicle battery, an insulation resistance measurement step for measuring an insulation resistance value of the electric vehicle battery, an impedance measurement step for obtaining an impedance characteristic of the electric vehicle battery, and a battery status diagnosis step for diagnosing the status of the electric vehicle battery based on the status measurement value of the electric vehicle battery.

[0031] Preferably, the insulation resistance measurement step according to one embodiment may provide a test voltage setting step of setting a test voltage based on a nominal voltage condition of an electric vehicle battery, and an insulation resistance measurement step of applying the set test voltage to the electric vehicle battery for a predetermined period of time to measure the insulation resistance value of the electric vehicle battery.

[0032] Preferably, in the test voltage setting step according to one embodiment, when the nominal voltage of the electric vehicle battery is less than 500 V, the test voltage may be set to 500 Vdc, when the nominal voltage of the electric vehicle battery is 500 V or more and less than 1000 V, the test voltage may be set to 1000 Vdc, and when the nominal voltage of the electric vehicle battery is 1000 V or more, the test voltage may be set to 2500 Vdc.

[0033] Preferably, the insulation resistance measuring step according to one embodiment may provide a voltage distribution measuring step of measuring a portion of the voltage of the electric vehicle battery using a voltage divider and estimating the total voltage of the electric vehicle battery using the measured portion of the voltage of the electric vehicle battery, and an insulation resistance calculating step of calculating the insulation resistance based on the measured total voltage of the electric vehicle battery.

[0034] Preferably, the voltage distribution measurement step according to one embodiment is characterized in that it indirectly calculates an insulation resistance corresponding to a nominal voltage of the electric vehicle battery through a portion of the measured voltage of the electric vehicle battery, and evaluates the insulation state of the electric vehicle battery by continuously monitoring a micro-leakage current using a high impedance meter.

[0035] Preferably, a battery diagnosis method using a mobile battery diagnosis device according to one embodiment may provide an external inspection step for inspecting the internal pressure state, electrolyte leakage state, gas emission state, case state, terminal state, wiring state, insulator system state, and cooling system state of an electric vehicle battery, and a battery reuse judgment step for determining whether or not to reuse the electric vehicle battery based on the inspection results of the external inspection step.

[0036] Preferably, a battery diagnosis method using a mobile battery diagnosis device according to one embodiment may provide a BMS inspection step of connecting an electric vehicle battery to a BMS and measuring a cell voltage (B.C_Vcell) of the electric vehicle battery, a pack voltage (B_Vbatt) of the electric vehicle battery, and a temperature (B_T) of the electric vehicle battery, a SOC calculation step of calculating an SOC (State of Charge) of the electric vehicle battery based on the type of the electric vehicle battery, and an SOB calculation step of calculating an SOB (State of Balance) based on the calculated SOC.

[0037] Preferably, a battery diagnosis method using a mobile battery diagnosis device according to one embodiment may provide a cell voltage determination step of determining whether a cell voltage (B.C_Vcell) of an electric vehicle battery is between a preset minimum allowable voltage (B.C_Vmin) and a maximum allowable voltage (B.C_Vmax), a pack voltage determination step of determining whether a pack voltage (B_Vbatt) of an electric vehicle battery is between a preset minimum allowable voltage (B_Vmin) and a maximum allowable voltage (B_Vmax), a voltage imbalance determination step between individual modules of determining whether a difference between the sum of the pack voltage and the module voltage (Pack / System V - Module * N) of the electric vehicle battery has an error of less than 1%, an electric vehicle battery temperature determination step of determining whether a temperature (B_T) of the electric vehicle battery is between a preset minimum allowable temperature (B_Tmin) and a maximum allowable temperature (B_Tmax), and a battery reuse determination step of determining whether or not to reuse the electric vehicle battery based on results of the cell voltage determination step, the pack voltage determination step, the voltage imbalance determination step, and the electric vehicle battery temperature determination step.

[0038] Preferably, a battery diagnosis method using a mobile battery diagnosis device according to one embodiment may provide an AC signal application step of applying an AC signal to an electric vehicle battery by connecting a high-voltage relay to an electric vehicle battery and then connecting an AC impedance analyzer to the high-voltage relay, a step of detecting a voltage and a temperature of an electric vehicle battery to which an AC signal is applied, and an electric vehicle battery reuse determination step of determining whether or not the electric vehicle battery is to be reused based on a result of determining whether the detected voltage and temperature of the electric vehicle battery are within a predetermined normal range.

[0039] Preferably, a battery diagnosis method using a mobile battery diagnosis device according to one embodiment may provide an EIS data acquisition step for acquiring EIS data of an electric vehicle battery under predetermined EIS measurement conditions, a temperature correction step for correcting EIS data of an electric vehicle battery based on a measurement temperature under the EIS measurement conditions, and an SOH calculation step for calculating SOH_EIS from the EIS data.

[0040] Preferably, the predetermined EIS measurement conditions according to one embodiment include a minimum frequency condition (B.Freqmin), a maximum frequency condition (B.Freqmax), and the magnitude of the applied alternating current (AC Range).

[0041] Preferably, a battery diagnosis method using a mobile battery diagnosis device according to one embodiment may provide an internal resistance determination step of determining whether the value of the internal resistance acquired in the EIS data acquisition step is within a normal range of the internal resistance value of a predetermined electric vehicle battery, and a battery reuse determination step of determining whether the electric vehicle battery should be reused based on a result of determining whether the value of the internal resistance of the electric vehicle battery is within the normal range.

[0042] Preferably, a battery diagnosis method using a mobile battery diagnosis device according to one embodiment may provide a step of determining whether to reuse an electric vehicle battery based on electric vehicle battery status information, a step of generating a diagnosis report on the result of whether to reuse the electric vehicle battery, and a step of providing the diagnosis report through a user interface.

[0043] Preferably, a battery diagnosis method using a mobile battery diagnosis device according to one embodiment may provide a first voltage comparison step of comparing the power of the mobile battery diagnosis device with a first reference voltage, a step of determining that the mobile battery diagnosis device is inoperable when the power of the mobile battery diagnosis device is lower than the first reference voltage and lighting a red LED indicating an inoperable state of the mobile battery diagnosis device, a second voltage comparison step of comparing the power of the mobile battery diagnosis device with a second reference voltage when the power of the mobile battery diagnosis device is higher than the first reference voltage, a step of determining that the mobile battery diagnosis device is inoperable when the power of the mobile battery diagnosis device is lower than the second reference voltage and lighting a yellow LED indicating a limited operation state of the mobile battery diagnosis device, and a step of determining that the mobile battery diagnosis device is inoperable when the power of the mobile battery diagnosis device is higher than the second reference voltage and lighting a green LED indicating a normal operation state of the mobile battery diagnosis device.

[0044] A mobile battery diagnosis device according to one aspect of the present invention may include an input unit for obtaining a user input requesting diagnosis of a state of an electric vehicle battery, a measurement unit for obtaining an impedance measurement value of an electric vehicle battery, a connection unit for connecting the electric vehicle battery and the measurement unit, and a control unit for performing a customized connection method depending on whether the electric vehicle battery is detached or removed and whether a cover is removed, and then obtaining impedance data of the electric vehicle battery, diagnosing the state of the electric vehicle battery using the measured impedance to generate battery state information, and providing the generated battery state information to a user.

[0045] According to an embodiment of the present invention, a battery diagnostic module is mounted on a movable carrier module to ensure portability, while minimizing exposure of the terminal connection portion connected to the battery in the direction of movement of the carrier module by arranging the terminal connection portion to face upward. Accordingly, damage to the battery diagnostic module during transport can be minimized, thereby minimizing deterioration in battery diagnostic accuracy.

[0046] According to an embodiment of the present invention, accurate diagnosis is possible within a short period of time without a charging / discharging process, thereby significantly reducing the work time compared to existing methods, and work efficiency can be increased through a simple operation method.

[0047] In addition, the status of various batteries can be accurately diagnosed based on EIS measurements, allowing for a precise understanding of the health of the batteries. Accurate diagnosis results can be used to accurately predict the timing of battery replacement, preventing unnecessary replacements and improving system stability.

[0048] In addition, the battery status diagnosis device of the electric vehicle of the present invention is easy to carry, so that the battery status can be easily diagnosed on site, and the status of various types of batteries can be diagnosed, so that it has high usability.

[0049] According to an embodiment of the present invention, the status of the battery can be diagnosed in a removed or on-board state, thereby shortening the diagnosis time required for the battery status.

[0050] In addition, various additional effects can be achieved through various embodiments of the present invention. These various effects of the present invention will be described in detail in each embodiment, or descriptions of effects easily understandable to those skilled in the art will be omitted.

[0051] The following drawings attached to this specification illustrate preferred embodiments of the present invention and, together with the detailed description of the invention described below, serve to further understand the technical idea of ​​the present invention, and therefore, the present invention should not be interpreted as being limited to matters described in such drawings.

[0052] FIG. 1 is a drawing showing the overall shape of a battery diagnostic device according to one embodiment of the present invention.

[0053] Figures 2 to 4 are drawings showing a battery diagnosis module equipped in the battery diagnosis device of Figure 1.

[0054] Fig. 5 is a drawing showing a carrier module equipped in the battery diagnostic device of Fig. 1.

[0055] FIG. 6 is a drawing showing an area where a battery diagnostic module is installed in the carrier module of FIG. 5.

[0056] Figures 7 and 8 are enlarged views of part A of Figure 1.

[0057] Fig. 9 is a drawing showing a measuring component receiving portion of the carrier body in the carrier module of Fig. 5.

[0058] FIG. 10 and FIG. 11 are drawings showing a battery diagnostic device according to a second embodiment of the present invention.

[0059] FIG. 12 and FIG. 13 are drawings showing a battery diagnostic device according to a third embodiment of the present invention.

[0060] FIG. 14 and FIG. 15 are drawings showing a battery diagnostic device according to a fourth embodiment of the present invention.

[0061] FIG. 16 is a flowchart illustrating a method for diagnosing an electric vehicle battery using a mobile battery diagnosis device according to one embodiment of the present invention.

[0062] FIG. 17 is a drawing exemplarily illustrating a method of connecting a mobile battery diagnostic device and an electric vehicle battery according to one embodiment of the present invention.

[0063] Fig. 18 is a flowchart explaining a technical feature of measuring the insulation resistance of an electric vehicle battery and diagnosing its status according to one embodiment of the present invention.

[0064] Fig. 19 is a flowchart explaining the flow of electric vehicle battery exterior inspection and BMS inspection according to one embodiment of the present invention.

[0065] Figure 20 is a flowchart showing a BMS inspection step of an electric vehicle battery according to one embodiment of the present invention.

[0066] FIG. 21 is a flowchart illustrating an ACIA test performed before measuring the insulation resistance of an electric vehicle battery according to one embodiment of the present invention.

[0067] FIG. 22 is a flowchart illustrating technical features of generating a battery condition diagnosis report based on EIS measurement of an electric vehicle battery according to one embodiment of the present invention.

[0068] FIG. 23 is a flowchart illustrating a technical feature of initiating a battery diagnosis system according to an internal battery power of a mobile battery diagnosis device according to one embodiment of the present invention.

[0069] FIG. 24 is a flowchart illustrating technical features of connecting an electric vehicle battery and a mobile battery diagnostic device according to one embodiment of the present invention.

[0070] FIG. 25 is a drawing showing the configuration of a mobile battery diagnostic device according to one embodiment of the present invention.

[0071] FIG. 26 is a drawing illustrating a flow of technical features for diagnosing the status of an electric vehicle battery connected to a pad according to one embodiment of the present invention.

[0072] FIG. 27 is a drawing for explaining the physical properties of a mobile battery diagnostic device according to one embodiment of the present invention.

[0073] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. Prior to this, it should be noted that the terms and words used in this specification and claims should not be construed as limited to their conventional or dictionary meanings. Based on the principle that the inventor can appropriately define the concepts of terms to best explain his or her invention, they should be interpreted in a way that aligns with the technical spirit of the present invention.

[0074] Accordingly, the embodiments described in this specification and the configurations illustrated in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention, and it should be understood that there may be various equivalents and modified examples that can replace them at the time of this application.

[0075] The advantages and features of the present invention, and the methods for achieving them, will become clearer with reference to the embodiments described in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments presented below, but can be implemented in various different forms, and it should be understood that it includes all transformations, equivalents, and substitutes included in the spirit and technical scope of the present invention. The embodiments presented below are provided to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the invention of the scope of the invention. In describing the present invention, if a detailed description of a related known technology is judged to obscure the gist of the present invention, the detailed description thereof will be omitted.

[0076] The terminology used herein is merely used to describe specific embodiments and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, the terms "comprises" or "has" and the like are intended to indicate the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, and should be understood as not excluding in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof. Terms such as first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used solely for the purpose of distinguishing one component from another.

[0077] Unless otherwise defined, all terms used herein may be used in their common sense by those of ordinary skill in the art to which the present invention pertains. Furthermore, terms defined in commonly used dictionaries are not to be interpreted ideally or excessively unless explicitly and specifically defined otherwise.

[0078] FIG. 1 is a drawing showing the overall shape of a battery diagnostic device (10) according to one embodiment of the present invention.

[0079] In an embodiment of the present invention, the X-axis direction shown in the drawing may mean the front-back direction of the battery diagnostic device (10) described later, the Y-axis direction may mean the left-right direction of the battery diagnostic device (10) perpendicular to the X-axis direction and the horizontal plane (XY plane), and the Z-axis direction may mean the up-down direction perpendicular to both the X-axis direction and the Y-axis direction.

[0080] Referring to FIG. 1, a battery diagnostic device (10) according to one embodiment of the present invention may include a battery diagnostic module (100) and a carrier module (200).

[0081] The battery diagnosis module (100) may be configured to diagnose a battery. As an example, a "battery" may be a capacitor or a secondary battery that stores power by charging. In addition, the battery may include at least one of a battery pack comprising a plurality of battery modules, at least one battery module within the battery pack, a battery module comprising a plurality of battery cells, at least one battery cell within the battery module, a representative module representing a plurality of battery modules, and a representative cell representing a plurality of battery cells. In the drawings for explaining embodiments of the present invention, such a battery will be denoted by reference numeral 'B'.

[0082] Additionally, the battery diagnosis module (100) can diagnose the battery using electrochemical impedance spectroscopy (EIS), but is not limited thereto.

[0083] The carrier module (200) can detachably support the battery diagnostic module (100). In addition, the carrier module (200) can be configured to be movable.

[0084] The detailed configuration of the above battery diagnostic module (100) and carrier module (200) will be examined in detail in the related description to be provided later.

[0085] Figures 2 to 4 are drawings showing a battery diagnosis module (100) equipped in the battery diagnosis device (10) of Figure 1.

[0086] Referring to FIGS. 1 to 4, the battery diagnostic module (100) may include a diagnostic module body (110) and a battery diagnostic unit (120).

[0087] The above diagnostic module body (110) can be detachably coupled to the carrier module (200).

[0088] The above battery diagnostic unit (120) is provided inside the diagnostic module body (110) and can be configured to be connected to the battery and diagnose the battery.

[0089] For example, the battery diagnostic unit (120) may include, but is not limited to, a main control unit (122), an insulation resistance measurement unit (124) controlled by the main control unit (122) and measuring the insulation resistance of the battery, and an EIS measurement unit (126) measuring the AC impedance of the battery using electrochemical impedance spectroscopy.

[0090] Specifically, the diagnostic module body (110) may include a terminal connection portion (112), a grip portion (114), and an opening portion (116).

[0091] The terminal connection part (112) is provided on the upper side of the diagnostic module body (110) and can be electrically / mechanically connected to the battery diagnostic part (120). In addition, the terminal connection part (112) can be connected through the battery and the measuring part (C, see FIG. 9). Here, the measuring part (C) can be a BMS harness, an adapter, an HV harness, etc.

[0092] The above-mentioned grip section (114) may be provided on the upper side of the diagnostic module body (110) and configured in a form that can be gripped by the user.

[0093] The above opening (116) can be configured to open and close a portion of the diagnostic module body (110) equipped with a terminal connection portion (112).

[0094] FIG. 5 is a drawing showing a carrier module (200) equipped in the battery diagnostic device (10) of FIG. 1, FIG. 6 is a drawing showing an area in which a battery diagnostic module (100) is mounted in the carrier module (200) of FIG. 5, and FIGS. 7 and 8 are enlarged views of part A of FIG. 1. Here, FIG. 7 shows a state before the diagnostic module fixing part (230) and the fixed connection part (118) are connected, and FIG. 8 shows a state after the diagnostic module fixing part (230) and the fixed connection part (118) are connected.

[0095] Referring to FIG. 1, FIG. 5 to FIG. 8, the carrier module (200) may include a carrier body (210), a moving part (220), and a diagnostic module fixing part (230).

[0096] The carrier body (210) may include a mounting portion (212) on which the diagnostic module body (110) is mounted. This mounting portion (212) may form a receiving space in which the diagnostic module body (110) can be accommodated on the front side of the carrier body (210).

[0097] Specifically, the anchoring portion (212) may include a first surface (212a) and a second surface (212b).

[0098] The above first surface (212a) can be in contact with the side of the diagnostic module body (110) when the diagnostic module body (110) is mounted on the mounting portion (212).

[0099] The second surface (212b) is connected in a direction perpendicular to the first surface (212a) and can come into contact with the lower side of the diagnostic module body (110) when the diagnostic module body (110) is mounted on the mounting portion (212).

[0100] The above-described moving part (220) may be provided at the bottom of the carrier body (210) and configured to move the carrier body (210). As an example, the moving part (220) may be formed in the shape of a wheel. By means of the moving part (220), the diagnostic module body (110) mounted on the carrier body (210) may be moved along the front-back direction (X-axis direction) or the left-right direction (Y-axis direction) of the battery diagnostic device (10).

[0101] The above diagnostic module fixing part (230) is provided in the carrier body (210) and can be configured to be connected to the fixing connection part (118) of the diagnostic module body (110) to fix the diagnostic module body (110) to the mounting part (212).

[0102] At this time, the diagnostic module fixing part (230) may include a first fixing part (230a) and a second fixing part (230b). As an example, the diagnostic module fixing part (230) may be provided in the form of a latch.

[0103] The above first fixed part (230a) can be provided in the carrier body (210).

[0104] The above second fixing part (230b) is provided in the carrier body (210) and can be placed on the lower side of the first fixing part (230a).

[0105] These first fixing parts (230a) and second fixing parts (230b) can be provided as a pair on the left and right sides on the carrier body (210), as shown in FIGS. 5 and 6.

[0106] Additionally, the fixed connection portion (118) may include a first connection portion (118a) and a second connection portion (118b).

[0107] The above first connecting portion (118a) is provided in the diagnostic module body (110) and can be connected to the first fixing portion (230a).

[0108] The above second connecting portion (118b) is provided in the diagnostic module body (110) and is positioned on the lower side of the first connecting portion (118a) so as to be connected to the second fixing portion (230b).

[0109] Meanwhile, the diagnostic module fixing part (230) can be configured to fix the diagnostic module body (110) to the mounting part (212) with the terminal connection part (112) facing upward, as shown in FIG. 1.

[0110] According to this embodiment of the present invention, the battery diagnosis module (100) is mounted on a movable carrier module (200) to ensure portability, while the terminal connection portion (112) connected to the battery is directed upward, thereby minimizing exposure of the terminal connection portion (112) in the direction of movement of the carrier module (200) (front-back direction (X-axis direction), left-right direction (Y-axis direction)). Accordingly, damage to the battery diagnosis module (100) during the transportation of the battery diagnosis module (100) can be minimized, thereby minimizing deterioration in battery diagnosis accuracy.

[0111] Referring again to FIG. 6, the carrier module (200) may further include an anti-friction member (240).

[0112] The above-mentioned friction prevention unit (240) may be configured to prevent friction between the diagnostic module body (110) and the mounting unit (212) that occurs when the diagnostic module body (110) is mounted on the mounting unit (212). As an example, the friction prevention unit (240) may include a material having excellent elasticity, such as silicone or rubber.

[0113] Specifically, as shown in FIG. 6, the anti-friction portion (240) may be provided on at least one of the corner portion of the first surface (212a) of the mounting portion (212) and the corner portion of the second surface (212b) of the mounting portion (212).

[0114] That is, the friction prevention part (240) prevents friction between the diagnostic module body (110) and the mounting part (212) that occurs when the diagnostic module body (110) is mounted on the mounting part (212), and is provided only at the corner portion of the mounting part (212) so as to minimize interference between the diagnostic module body (110) and the mounting part (212).

[0115] FIG. 9 is a drawing showing the measuring component receiving portion (214) of the carrier body (210) in the carrier module (200) of FIG. 5.

[0116] Referring to FIGS. 1 and 9, the carrier body (210) may further include a measuring component receiving portion (214).

[0117] The above-described measuring component receiving portion (214) can receive the aforementioned measuring component (C) therein. This measuring component receiving portion (214) can be provided on the rear side of the mounting portion (212) when viewed in the front-back direction (X-axis direction) of the carrier body (210). In addition, the measuring component receiving portion (214) can be opened and closed by a separate receiving portion door (214a).

[0118] That is, the measuring component receiving portion (214) can receive the measuring component (C) internally when battery diagnosis is not performed by the battery diagnosis module (100).

[0119] FIG. 10 and FIG. 11 are drawings showing a battery diagnostic device (12) according to a second embodiment of the present invention.

[0120] Since the battery diagnosis device (12) according to the present embodiment is similar to the battery diagnosis device (10) according to the previous embodiment, duplicate descriptions of components that are substantially the same or similar to those of the previous embodiment will be omitted, and the following will focus on differences from the previous embodiment.

[0121] Referring to FIGS. 10 and 11, in the battery diagnostic device (12), the carrier module (200) may further include a diagnostic module guide portion (250).

[0122] The above diagnostic module guide unit (250) may be configured to support the diagnostic module body (110) when the battery diagnostic module (100) is connected to the battery. This diagnostic module guide unit (250) may be configured to be accommodated within the aforementioned measuring component accommodation unit (214) when battery diagnosis by the battery diagnostic module (100) is not performed.

[0123] Specifically, the mounting portion (212) of the aforementioned carrier body (210) may include a fixing groove portion (212c).

[0124] The above-mentioned fixed groove portion (212c) may be formed in a groove shape and extend long along the left-right direction (Y-axis direction) of the carrier body (210) in the area where the first surface (212a) and the second surface (212b) meet.

[0125] In addition, the diagnostic module guide section (250) may include an inclined main body section (252). As an example, the inclined main body section (252) may be formed in a plate shape having a predetermined area.

[0126] The above-mentioned inclined main body (252) may be arranged so as to be inclined with respect to the second surface (212b) by having a battery diagnostic module (100) positioned at the upper portion and having an end joined to a fixed groove portion (212c). At this time, the end of the inclined main body (252) may be joined in a form that fits into the fixed groove portion (212c).

[0127] Meanwhile, when the battery diagnosis module (100) is connected to the battery as in FIG. 11, the inclined main body (252) can support the diagnosis module main body (110) in an inclined state.

[0128] According to this implementation configuration, compared to diagnosing a battery in a state where the diagnostic module body (110) is completely separated from the carrier body (210) and unstably placed on the ground, etc., the battery can be diagnosed in a state where the diagnostic module body (110) is supported by the carrier body (210) without shaking. Accordingly, the accuracy of battery diagnosis by the battery diagnostic module (100) can be further improved.

[0129] In addition, after the battery diagnosis is completed and the diagnostic module guide part (250) is separated from the fixing part (212), the diagnostic module body (110) can be immediately re-attached to the carrier body (210) without the need to move the diagnostic module body (110) excessively, so that the battery diagnosis operation by the battery diagnostic module (100) can be configured compactly and conveniently.

[0130] Referring to FIGS. 10 and 11, the diagnostic module guide portion (250) may further include an inclined support portion (254).

[0131] The above-mentioned inclined support member (254) may be configured to support the lower portion of the inclined main body part (252) by being coupled to the anti-friction member (240) provided at the corner portion of the second surface (212b) of the mounting member (212). As an example, the inclined support member (254) may be formed in a pillar shape. In addition, the lower portion of the inclined support member (254) may be provided in a form that can be fitted into the anti-friction member (240). In addition, the upper end of the inclined support member (254) may be in contact with the lower portion of the inclined main body part (252).

[0132] Meanwhile, the inclined support member (254) is configured to be inclined at an angle greater than the angle of inclination with respect to the second surface (212b) of the inclined main body member (252) when the inclined main body member (252) supports the diagnostic module main body (110) in an inclined state, so as to support the lower portion of the inclined main body member (252).

[0133] That is, when the battery diagnosis module (100) is connected to the battery and diagnoses the battery, the inclined support member (254) is configured to be inclined at an angle greater than the angle of inclination with respect to the second surface (212b) of the inclined main body member (252) while the lower end is supported by the anti-friction member (240) including a material with excellent elasticity, such as silicone or rubber, so as to support the lower portion of the inclined main body member (252). Accordingly, the diagnostic module main body (110) can be supported on the carrier main body (210) without shaking, thereby further increasing the accuracy of the battery diagnosis.

[0134] FIG. 12 and FIG. 13 are drawings showing a battery diagnostic device (14) according to a third embodiment of the present invention.

[0135] Since the battery diagnosis device (14) according to the present embodiment is similar to the battery diagnosis device (10) according to the previous embodiment, duplicate descriptions of components that are substantially the same or similar to those of the previous embodiment will be omitted, and the following will focus on differences from the previous embodiment.

[0136] Referring to FIGS. 12 and 13, in the battery diagnostic device (14), the carrier module (200) may further include a diagnostic module buffer (260).

[0137] The above diagnostic module buffer (260) may have one end connected to the diagnostic module fixing portion (230) and the other end connected to the fixing connection portion (118). In addition, the diagnostic module buffer (260) may be configured to elastically support the diagnostic module body (110) with respect to the carrier body (210). As an example, the diagnostic module buffer (260) may include an elastic spring.

[0138] Specifically, the diagnostic module buffer unit (260) may include a first buffer unit (260a) and a second buffer unit (260b).

[0139] The above first buffer part (260a) may be configured such that one end is connected to the first fixing part (230a) and the other end is connected to the second connecting part (118b) to elastically support the lower side of the diagnostic module body (110) with respect to the upper side of the carrier body (210).

[0140] The second buffer part (260b) may be configured such that one end is connected to the second fixing part (230b) and the other end is connected to the first connecting part (118a) to elastically support the upper side of the diagnostic module body (110) relative to the lower side of the carrier body (210).

[0141] This diagnostic module buffer (260) can be separated from the diagnostic module fixing portion (230) and the fixing connection portion (118) when the battery diagnostic module (100) performs a diagnosis on the battery (when the diagnostic module body (110) is separated from the carrier body (210).

[0142] Meanwhile, in the battery diagnostic device (14), the first buffer part (260a) coupled to the first fixing part (230a) of the carrier module (200) may be connected to the second connection part (118b) arranged on the lower side of the first connection part (118a) without being connected to the first connection part (118a) of the diagnostic module body (110) coupled to the first fixing part (230a), and the second buffer part (260b) coupled to the second fixing part (230b) of the carrier module (200) may be connected to the first connection part (118a) arranged on the upper side of the second connection part (118b) without being connected to the second connection part (118b) of the diagnostic module body (110) coupled to the second fixing part (230b).

[0143] That is, when viewed from one side and the other side in the left-right direction (Y-axis direction) of the battery diagnostic device (14), the first buffer part (260a) and the second buffer part (260b) can elastically support the diagnostic module body (110) with respect to the carrier body (210) in a state where they are crossed vertically.

[0144] Accordingly, when the carrier module (200) is moved, the diagnostic module body (110) can be prevented from being separated from the carrier body (210) in the forward / backward direction (X-axis direction) of the carrier module (200). That is, according to the present embodiment, the portability of the battery diagnostic module (100) can be maximized while damage to the battery diagnostic module (100) during the transport process can be minimized.

[0145] FIG. 14 and FIG. 15 are drawings showing a battery diagnostic device (16) according to the fourth embodiment of the present invention.

[0146] Since the battery diagnostic device (16) according to the present embodiment is similar to the battery diagnostic device (10) according to the previous embodiment, duplicate descriptions of components that are substantially the same or similar to those of the previous embodiment will be omitted, and the following will focus on differences from the previous embodiment.

[0147] Referring to FIGS. 14 and 15, in the battery diagnosis device (16), the battery diagnosis module (100) may further include a measurement component guide section (130).

[0148] The above measurement component guide portion (130) may be configured to support at least a portion of the measurement component (C) that is coupled to the opening portion (116) and connects between the battery and the terminal connection portion (112).

[0149] Specifically, the measuring component guide portion (130) may include a joining portion (130a) and a folding portion (130b).

[0150] The above-mentioned connecting portion (130a) can be connected to the inner surface of the opening portion (116).

[0151] The above folding portion (130b) can be connected to the connecting portion (130a). As an example, the folding portion (130b) can be composed of a plurality of members connected to each other by a hinge connection.

[0152] As shown in Fig. 14, this folding part (130b) can be positioned inside the diagnostic module body (110) in contact with the inner surface of the opening part (116) in a multi-folded state when the opening part (116) is closed. In addition, as shown in Fig. 15, the folding part (130b) can be configured to unfold and support the lower end of the measurement component (C) when the opening part (116) is opened during battery diagnosis.

[0153] That is, when the terminal connection part (112) of the battery diagnosis module (100) is connected to the battery and the battery diagnosis part (120) diagnoses the battery, the folding part (130b) is unfolded to support the lower part of the measurement part (C), thereby preventing the accuracy of the battery diagnosis from being lowered due to shaking of the measurement part (C) or interference with other parts.

[0154] According to this implementation configuration, when the battery diagnosis module (100) is transported, the measurement component guide section (130) is configured compactly so that it is not exposed to the outside, and when a battery diagnosis is performed by the battery diagnosis module (100), the measurement component (C) connecting the battery and the terminal connection section (112) is supported using the measurement component guide section (130), thereby increasing the accuracy of the battery diagnosis.

[0155] Fig. 16 is a flowchart illustrating a battery diagnosis method using a mobile battery diagnosis device according to one embodiment of the present invention, and Fig. 17 is a drawing exemplarily explaining a method of connecting a mobile battery diagnosis device and an electric vehicle battery according to one embodiment of the present invention. Fig. 18 is a flowchart explaining a technical feature of diagnosing a condition by measuring the insulation resistance of a battery according to one embodiment of the present invention.

[0156] In one embodiment, a method for diagnosing an electric vehicle battery using a mobile battery diagnosis device can be provided, including a step (S10) of obtaining impedance data of an electric vehicle battery after performing a customized connection method depending on whether an electric vehicle battery is detached or removed and whether a cover is removed, a step (S20) of diagnosing the state of the electric vehicle battery using the measured impedance to generate battery state information, and a step (S30) of providing the generated battery state information to a user.

[0157] Referring to FIG. 17, according to one embodiment, a method for customizing a battery connection for an electric vehicle may provide a method for connecting a battery using a charging terminal of an electric vehicle while the battery is installed on-board the electric vehicle, a method for connecting a battery at the bottom of the electric vehicle using any one of a high-voltage connector, a BMS connector, and a manufacturer connector, a method for connecting a battery removed from the electric vehicle using any one of a high-voltage connector, a BMS connector, and a manufacturer connector, and a method for connecting a battery removed from the electric vehicle by removing the cover of the battery and using an internal connection terminal and connector.

[0158] In one embodiment, a customized connection method for an electric vehicle battery may be selected based on one of the following: the type and status of the electric vehicle battery, user input, and judgment of the control unit.

[0159] In one embodiment, the step of obtaining impedance data of an electric vehicle battery is characterized by obtaining data generated from an electric vehicle battery through a BMS and OBD terminal of the electric vehicle or the battery of the electric vehicle, and the data of the battery can be obtained through impedance measurement, insulation resistance measurement, DC-IR measurement, and AC-IR measurement.

[0160] In one embodiment, the step of generating electric vehicle battery status information may provide a step of obtaining user input for inputting the type of electric vehicle battery, an insulation resistance measurement step for measuring an insulation resistance value of the electric vehicle battery, an impedance measurement step for obtaining impedance characteristics of the electric vehicle battery, and a battery status diagnosis step for diagnosing the status of the electric vehicle battery based on the status measurement value of the electric vehicle battery.

[0161] This will be explained in detail below.

[0162] In the description below, the internal battery refers to a battery that supplies power used for the operation of the mobile battery diagnostic device (100), and the electric vehicle battery refers to a battery of an electric vehicle whose status is diagnosed by the mobile battery diagnostic device (100).

[0163] Referring to Fig. 18, the insulation resistance measurement step may include a step of setting a test voltage (S31), a step of measuring insulation resistance (S32), and a step of comparing the insulation resistance and the lower limit value of the insulation resistance (S33).

[0164] Here, insulation resistance is a value that indicates the degree to which leakage current flows between conductors. For electric vehicle batteries, good insulation between internal components is essential for safe use. Low insulation resistance indicates a high level of internal leakage current, which can lead to reduced battery performance, overheating, and even the risk of explosion.

[0165] A decrease in insulation resistance can shorten the life of the battery, and electric vehicle batteries with low insulation resistance have a higher risk of short circuits or overheating, which can cause safety accidents. In addition, low insulation resistance can reduce the capacity of the electric vehicle battery and reduce charging efficiency, so measuring the insulation resistance value is an important process for judging the performance of electric vehicle batteries.

[0166] Step 31 of setting the test voltage according to one embodiment establishes the basic environment for insulation resistance measurement. This includes preparing the measurement equipment and verifying the connection to the electric vehicle battery being measured. Next, an appropriate test voltage can be set based on the nominal voltage of the electric vehicle battery being measured.

[0167] In the test voltage setting step (S31) according to one embodiment, if the nominal voltage of the electric vehicle battery is less than 500 V, the test voltage may be set to 500 Vdc, if the nominal voltage of the electric vehicle battery is 500 V or more and less than 1000 V, the test voltage may be set to 1000 Vdc, and if the nominal voltage of the electric vehicle battery is 1000 V or more, the test voltage may be set to 2500 Vdc. This method uses a pressurized method to measure insulation resistance, and the pressurized method is a method of measuring insulation resistance by applying a high voltage from the outside.

[0168] Another alternative approach is to use a voltage divider to measure a portion of an electric vehicle battery's voltage, thereby estimating the overall voltage. This voltage divider approach is safe because it doesn't directly apply high voltage, and it simplifies measurement by eliminating the need for a separate high-voltage generator. Furthermore, it allows for continuous monitoring of the insulation status even during battery operation.

[0169] More specifically, the insulation resistance measurement step (S31) may include a voltage distribution measurement step of measuring a portion of the voltage of the electric vehicle battery using a voltage divider and estimating the total voltage of the electric vehicle battery using the portion of the voltage of the electric vehicle battery measured by the ideal device, and an insulation resistance calculation step of calculating the insulation resistance based on the measured total voltage of the electric vehicle battery.

[0170] In addition, the voltage distribution measurement step indirectly calculates the insulation resistance corresponding to the nominal voltage of the electric vehicle battery through a portion of the measured voltage of the electric vehicle battery, and continuously monitors the micro-leakage current using a high impedance meter, thereby evaluating the insulation status of the electric vehicle battery.

[0171] Here, the nominal voltage is the standard voltage value that an electric vehicle battery exhibits under normal operating conditions, and may be set differently depending on the type, capacity, and usage environment of the battery.

[0172] Here, the test voltage is a voltage artificially applied to evaluate the insulation performance of an electric vehicle battery. It is a voltage that can be used to check the insulation status of an electric vehicle battery, predict the possibility of failure, and verify that it meets safety standards. It is generally set higher than the nominal voltage.

[0173] For electric vehicle batteries, higher nominal voltages are designed to operate at higher voltages. Higher nominal voltages require higher insulation requirements, necessitating more stringent test conditions. Therefore, test voltages are set differently depending on the nominal voltage. Consequently, setting an appropriate test voltage for the nominal voltage can prevent insulation breakdown and enable efficient testing to detect insulation defects while complying with safety regulations.

[0174] In an insulation resistance measurement step (S32) according to one embodiment, a test voltage set according to the nominal voltage may be applied and the insulation resistance value may be measured for a predetermined period of time. For example, the insulation resistance may be measured for approximately 60 seconds to obtain a meaningful insulation resistance measurement value.

[0175] Next, in the step (S33) of comparing the insulation resistance with the insulation resistance lower limit, the measured insulation resistance value is compared with the predetermined insulation resistance lower limit, and if the insulation resistance is below the lower limit, the insulation condition is determined to be poor, the electric vehicle battery is determined to be unusable, and further electric vehicle battery condition diagnosis can be stopped. In this case, a battery condition diagnosis report can be created based on the reason for determining unusable.

[0176] Here, the non-reusable judgment is a reference judgment determined by the mobile battery diagnostic device (100), and does not necessarily mean that the battery cannot be reused. Rather, it may mean information that includes the reason for the non-reusable judgment to recommend non-reusability to the user. In other words, the non-reusable judgment is information to help the user decide whether to reuse (recycle) the electric vehicle battery.

[0177] Here, the lower limit of insulation resistance can be appropriately set by considering the type of battery to be measured, the usage environment, safety standards, etc., and errors that occur due to factors such as the accuracy of the measuring equipment, the measurement environment, and the user's operation can be taken into account.

[0178] Additionally, if the measured insulation resistance value is higher than the lower insulation resistance limit, the insulation condition of the electric vehicle battery can be determined to be good. At this time, the mobile battery diagnostic device (100) can create a condition analysis report based on the battery insulation condition or proceed with a process for the next condition diagnosis.

[0179] In one embodiment, the battery status diagnosis step may compare the measured insulation resistance value with a predetermined insulation resistance lower limit value, determine that there is a high possibility of a problem with the battery if the measured value is lower than the lower limit value, and output a status diagnosis result.

[0180] The results of diagnosing the status of the electric vehicle battery in the battery status diagnosis step may be displayed on the display unit of the mobile battery diagnosis device (100) or transmitted to a device other than the mobile battery diagnosis device (e.g., a user terminal, an external server).

[0181] A series of steps can be used to periodically measure the insulation resistance of electric vehicle batteries to detect abnormalities early, extend the life of electric vehicle batteries by replacing or managing problematic batteries early, and prevent system failures caused by electric vehicle battery problems in advance, thereby improving system stability.

[0182] Below, each step and the steps before and after it are explained in detail.

[0183] FIG. 19 is a flowchart explaining the flow of battery appearance inspection and BMS inspection according to one embodiment of the present invention, FIG. 19 is a flowchart showing a BMS inspection step of an electric vehicle battery according to one embodiment of the present invention, FIG. 20 is a flowchart explaining an ACIA inspection performed before measuring insulation resistance of a battery according to one embodiment of the present invention, and FIG. 22 is a flowchart explaining a technical feature of generating a battery condition diagnosis report according to EIS measurement of an electric vehicle battery according to one embodiment of the present invention.

[0184] <Exterior inspection stage>

[0185] According to one embodiment of the present invention, a mobile battery diagnostic device (100) can provide an external inspection step (S301) for inspecting the internal pressure state of a battery, electrolyte leakage state, gas emission, case state, terminal state, wiring state, insulator system state, and cooling system state, and a battery reuse judgment step (S302) for analyzing and providing information necessary for determining whether or not to reuse the battery based on the inspection results of the external inspection step.

[0186] Hereinafter, the step of determining battery reuse refers to the step of generating battery diagnosis information by diagnosing whether the battery can be reused based on the results derived from various battery inspection processes previously performed by the mobile battery diagnosis device (100). More specifically, the battery diagnosis information generated based on battery inspection information such as appearance information, SOC, SOH, SOB, impedance signal, and other battery inspections is provided to the user, thereby helping the user to refer to it when determining whether the battery can be reused. In other words, the step of determining battery reuse is not a step of unconditionally determining whether the battery can be reused, but rather a step of generating and providing judgment information on whether reuse is possible based on the results of the battery inspection.

[0187] As shown in Fig. 19, the mobile battery diagnostic device (100) can perform an external inspection (S301) of an electric vehicle battery before communication with the electric vehicle battery is established. The external inspection (S301) of an electric vehicle battery is a very important first step in evaluating the safety and performance of an electric vehicle battery. After confirming the information (type, capacity, manufacturer, etc.) of the battery to be inspected, a visual inspection is performed or, if necessary, quantitative data is obtained through thickness measurement, temperature measurement, etc., and the presence of internal damage can be checked using X-ray, etc.

[0188] - Case inspection: Thoroughly check the electric vehicle battery case for deformation, swelling, cracks, and corrosion, examine the case surface for foreign substances or scratches, and check for gaps or openings in the joints.

[0189] -Terminal inspection: Check for corrosion, discoloration, rust, deformation, or cracks in the terminal area, check for looseness or poor contact in the terminal, and check the condition of the insulation around the terminal.

[0190] -Seal Inspection: Check the seal for damage, cracks, or swelling, and check for foreign matter or traces of penetration around the seal.

[0191] -Exhaust Inspection: Check for blockages or deformations in the exhaust port and check for signs of liquid leakage around the exhaust port.

[0192] -Label Inspection: Check for damage, detachment, or alteration of the label, check that the information on the label matches the information on the actual battery, and check the information on the battery to be inspected (type, capacity, manufacturer, etc.).

[0193] -Wiring inspection: Check for damage to the wiring, open circuits, and damaged insulation, and check for looseness and rust in the wiring connections.

[0194] -Cooling system: Check for damage or blockage in cooling fans, cooling pipes, etc., and check for coolant leaks.

[0195] -Other: Check sensory aspects such as smell and noise.

[0196] If any of the above-mentioned abnormalities are detected, the electric vehicle battery may be deemed abnormal. If any of the symptoms identified as particularly serious are detected, the electric vehicle battery may be deemed unusable. For example, if any of the following conditions occur, the electric vehicle battery should be deemed unusable.

[0197] - (Reason 1) Inflated due to internal pressure: There is a high possibility of gas generation due to internal short circuit or overheating.

[0198] - (Reason 2) Electrolyte leakage: Leaked electrolyte can corrode surrounding components and cause safety issues.

[0199] - (Reason 3) Gas eruption status: There is a high possibility of gas generation due to an internal abnormal reaction, and there is a risk of explosion.

[0200] - (Reason 4) Damage caused by external impact: May cause internal circuit short circuit or performance degradation.

[0201] - (Reason 5) Damage to terminal area: May cause poor contact or short circuit, resulting in system malfunction.

[0202] - (Reason 6) Damage and deformation of wiring, insulators, high-voltage buses, insulation systems, and PCBs: Causes electrical problems, which may result in fire or electric shock.

[0203] The reasons mentioned above are only examples, and more reasons may arise, and each reason may include specific numbers.

[0204] According to one embodiment of the present invention, a mobile battery diagnostic device (100) can provide a user with battery diagnostic information obtained by analyzing external information based on the results derived from the battery inspection step through a battery diagnostic step. That is, in the battery diagnostic step, battery diagnostic information can be provided to assist the user in determining whether or not to reuse the battery.

[0205] <BMS 검사>

[0206] A mobile battery diagnostic device (100) according to one embodiment can obtain an input from a user to select a type of electric vehicle battery (S303).

[0207] According to one embodiment of the present invention, a mobile battery diagnostic device (100) can provide a user input acquisition step (S303) for acquiring user input for selecting a type of battery, a BMS inspection step (S304) for an electric vehicle battery, and a step (S305) for determining whether the BMS inspection result is normal.

[0208] The user input acquisition step (S303) receives input from the user regarding the type, type, etc. of the electric vehicle battery, and the mobile battery diagnosis device (100) can search the information of the electric vehicle battery included in the user input from a database and display the diagnostic conditions and other information of the electric vehicle battery through the display. Since the mobile battery diagnosis device (100) cannot connect to the BMS in the case of an unregistered electric vehicle battery for which no information has been previously registered, the mobile battery diagnosis device (100) can provide a user UI requesting registration of information.

[0209] A mobile battery diagnostic device (100) according to one embodiment can perform a BMS inspection as shown in FIG. 20.

[0210] A mobile battery diagnostic device (100) according to one embodiment measures the cell voltage (B.C_V) of a battery cell ) is the preset minimum allowable voltage (B.C_V min ) to the maximum allowable voltage (B.C_V) max ) can be performed to determine whether the cell voltage is in the range of 0 to 1000 V.

[0211] More specifically, the voltage of each cell of an electric vehicle battery is individually measured, and the measured cell voltage is set to a preset minimum allowable voltage (B.C_V min ) and maximum allowable voltage (B.C_V max ), if the measured voltage is within the set range, it is judged as normal, and if it is out of the range, it is judged as abnormal, and replacement or additional inspection is performed. (Judgment criteria: B.C_V min ≤ V cell ≤ B.C_V max )

[0212] Next, the battery pack voltage (B_V batt ) is the preset minimum allowable voltage (B_V min ) to the maximum allowable voltage (B_V max) can be performed. In this step, the voltage of the entire battery pack is measured to check whether the voltage of the entire battery pack is within the normal range, and the measured pack voltage is compared to the preset minimum allowable voltage (B_V min ) and maximum allowable voltage (B_V max ) and if the measured voltage is within the set range, it is considered normal. If it is outside the range, it is considered abnormal, and the possibility of cell imbalance, internal short circuit, or other problems is determined. (Judgment criteria: BV min ≤ V batt ≤ BV max )

[0213] In one embodiment, a voltage imbalance determination step (S3043) between individual modules is performed to determine whether the difference between the sum of the pack voltage and the module voltage (Pack / System V - Module * N) of the battery has an error of less than 1%. In this step, the voltage difference between the modules is checked to see if it is within the allowable range, and the value obtained by subtracting the sum of the module voltages from the pack voltage is calculated to determine whether there is an imbalance between the modules, and it is checked whether the calculated value is within 1% of the pack / system voltage. If it is within the error range of 1%, it is determined to be normal, and if it is out of the range, it is determined that there is a possibility that an imbalance between the modules has occurred. (Judgment criteria: Pack / System V - Module * N = Pack / System V within 1%)

[0214] In one embodiment, the temperature of the battery (B_T) is set to a preset minimum allowable temperature (B_T min ) to the maximum allowable temperature (B_T max ) can be performed. In this step, the measured electric vehicle battery temperature is set to a preset minimum allowable temperature (B_T) to determine whether the battery temperature is within a normal range and to determine the risk of deterioration or overheating. min) and maximum allowable temperature (B_T max ) is judged as normal if the measured temperature is within the set range, and as abnormal if it is outside the range. (Judgment criteria: B.Tmin ≤ T ≤ B.Tmax)

[0215] Next, a battery reuse determination step (S3045) is performed to determine whether to reuse the battery based on the results of the cell voltage determination step, the pack voltage determination step, the voltage imbalance determination step, and the battery temperature determination step.

[0216] SOC (State of Charge) is a percentage (%) that indicates how much electrical energy remains in the battery, and SOB (State of Balance) is an indicator of the degree of imbalance between cells.

[0217] In one embodiment, by utilizing the State of Charge (SoC), it is possible to determine whether to charge the electric vehicle battery by checking how much power remains in the battery, and by controlling charging and discharging based on the SOC, it is possible to prevent overcharging and overdischarging of the battery, and by analyzing the SOC change pattern, it is possible to predict the life of the battery and determine when to replace it.

[0218] In one embodiment, by utilizing the State of Balance (SoB), the voltage difference between individual cells is analyzed to check and manage cell imbalance. In particular, if the cell imbalance becomes severe, safety issues such as heat generation and internal short circuits may occur, so this can be detected and prevented in advance through the SOB.

[0219] The mobile battery diagnostic device (100) can analyze SoC and SoB together to evaluate the overall health of the battery and predict its lifespan, and can use all previously acquired data together to generate information on whether or not an electric vehicle battery can be reused.

[0220] In summary, according to one embodiment of the present invention, the mobile battery diagnostic device (100) can provide a user with battery diagnostic information by analyzing appearance information, SOC, SOH, SOB, or other battery inspection information based on the results derived from the corresponding battery inspection step. In other words, the mobile battery diagnostic device (100) can ultimately provide battery diagnostic information to assist the user in determining whether or not to reuse the battery.

[0221] <ACIA 검사>

[0222] According to one embodiment of the present invention, an ACIA inspection step (S401) and a normal range determination step (S402) of voltage conditions and temperature conditions can be performed after a BMS inspection.

[0223] The ACIA test step (S401) involves connecting a high-voltage relay to the test battery, then connecting an alternating current impedance analyzer (ACIA) to the high-voltage relay to apply an AC signal to the battery. This allows the voltage and temperature of the electric vehicle battery to be detected. The ACIA test accurately measures the battery's internal resistance, capacity, and other factors to assess its health. The following steps are performed.

[0224] - High-voltage relay connection: Connect the high-voltage relay to the battery under test. The high-voltage relay safely connects the ACIA to the battery and, if necessary, disconnects the battery from the ACIA.

[0225] -ACIA connection: Connect the ACIA to the high-voltage relay. The ACIA generates an AC signal and analyzes the signal from the battery to measure impedance.

[0226] -AC signal application: An AC signal of a specific frequency and amplitude is applied to the battery via the ACIA. The conditions for the applied signal may vary depending on the battery type and capacity.

[0227] Voltage and Temperature Detection: While an AC signal is applied to the battery, the battery's voltage and temperature are measured. Voltage measurements are used to calculate the battery's open-circuit voltage (OCV) and AC component, which are then used to calculate the battery's internal resistance. Temperature measurements are crucial for determining the battery's thermal condition.

[0228] In one embodiment, in step S402, it is possible to determine whether to reuse the battery based on the result of determining whether the voltage and temperature of the detected electric vehicle battery are within a predetermined normal range. More specifically, the measured voltage and temperature of the electric vehicle battery are set to a preset reference value (BV min , BV max , BT min , BT max ) is compared with.

[0229] Voltage Comparison: BV min ≤ Vbatt ≤ BV max

[0230] Temperature comparison: BT min ≤ T ≤ BT max

[0231] A mobile battery diagnostic device (100) according to one embodiment determines whether the battery can be reused if all conditions are satisfied based on the comparison results, and if the measured value does not satisfy some criteria, it is possible that the battery's performance has deteriorated or an abnormality has occurred, so it can decide to conduct additional inspection or replace the battery.

[0232] In Fig. 23, the characteristics of connecting a battery to a mobile battery diagnostic device (100) before performing the steps of Figs. 18 to 20 after an external inspection of an electric vehicle battery are described in a time-series flow.

[0233] An electric vehicle battery that is judged normal in the electric vehicle battery appearance inspection (S701) is connected to a mobile battery diagnostic device (100) via an HV cable (S702), then connected to the mobile battery diagnostic device (100) via a BMS cable (S703), and a temperature sensor is connected to the electric vehicle battery (S704). When the mobile battery diagnostic device (100) is connected to the electric vehicle battery via the HV cable, BMS cable, and temperature sensor, it executes electric vehicle battery diagnostic software (S705).

[0234] At this time, the mobile battery diagnosis device (100) determines whether the power of the built-in battery is higher than the second reference power (S706), and if the power of the built-in battery is lower than the second reference power, it is not sufficient to perform a diagnosis of the electric vehicle battery, so a charging guidance UI is displayed (S707) to allow the user to charge the mobile battery diagnosis device (100). If the power of the built-in battery is higher than the second reference power, the mobile battery diagnosis device (100) establishes communication with the electric vehicle battery and initiates a diagnosis of the state of the electric vehicle battery.

[0235] <EIS 검사>

[0236] A mobile battery diagnostic device (100) according to one embodiment can perform an EIS data acquisition step (S501) of acquiring EIS data of a battery under predetermined EIS measurement conditions, a step (S502) of correcting the battery EIS data based on a measurement temperature under the EIS measurement conditions and determining whether the internal resistance is within a normal range, and an SOH calculation step (S503) of calculating SOH_EIS from the EIS data.

[0237] In one embodiment, electrochemical impedance spectroscopy (EIS) is a key analytical technique for assessing a battery's health by accurately measuring its internal resistance, capacity, and other parameters. To obtain accurate data, measurement conditions must be appropriately set. These conditions may vary depending on the battery's characteristics and the purpose of the analysis.

[0238] In one embodiment, the EIS measurement conditions set in the EIS data acquisition step (S501) are the minimum frequency conditions (B.Freq min ), frequency maximum condition (B.Freq max ) and the size of the AC current applied (AC Range).

[0239] In one embodiment, the frequency minimum condition (B.Freq min ) is the lowest frequency used for measurement, and the impedance value at low frequency reflects the overall resistance of the battery, which can be used to evaluate the health of the battery. In addition, the maximum frequency condition (B.Freq max ) is the highest frequency used for impedance measurement, and the impedance value at high frequencies reflects the charge transfer resistance occurring on the electrode surface, which can be used to evaluate the possibility of a short circuit or corrosion in the battery.

[0240] In one embodiment, the magnitude of the AC current applied (AC Range) refers to the magnitude of the AC current applied to the battery, and by varying the magnitude of the AC current, the nonlinear characteristics of the battery can be analyzed. Generally, applying a small current allows for analysis of the high-frequency characteristics of the battery, while applying a large current allows for analysis of the low-frequency characteristics.

[0241] In step S502, the EIS data can be temperature compensated using the measured temperature, and feature parameters (Rs, Rct) can be extracted from the temperature-compensated EIS data.

[0242] Here, Rs represents the ohmic resistance (high-frequency resistance) of the electric vehicle battery, representing the resistance between the electrodes and the electrolyte. Rct represents the battery's charge transfer resistance, representing the resistance to the charge transfer reaction occurring on the electrode surface. SoH (State of Health) is an indicator of the battery's health.

[0243] At step S503, the state of health (SoH) of the battery can be calculated using EIS data.

[0244] Equivalent Circuit Modeling: Based on measured data, the battery can be represented as an equivalent circuit model. The Randles circuit model is commonly used, extracting parameters such as Rs (high-frequency resistance), Rct (charge transfer resistance), and T (time constant).

[0245] -Temperature compensation: Accurately measure the temperature of the electric vehicle battery during measurement, and compensate for the Rs and Rct values ​​using the temperature compensation formula.

[0246] -Judgment using BattInfo.RS lower bound and BattInfo.RS upper bound:

[0247] i) Setting the Rs range: BattInfo.RS lower limit and BattInfo.RS upper limit represent the lower and upper limits of the Rs value, respectively, and this range represents the normal operating range of the battery.

[0248] ii) Range comparison: If the temperature-compensated Rs value is less than the BattInfo.RS lower limit or greater than the BattInfo.RS upper limit, the battery is likely not in a normal condition.

[0249] Additionally, in addition to Rs, other parameters such as Rct and T can be comprehensively analyzed to more accurately evaluate the condition of the battery. Since various factors such as charge / discharge speed and surrounding environment can affect the EIS results, these factors should be taken into consideration when analyzing.

[0250] Here, BattInfo.RS lower limit is the minimum Rs value that the battery can exhibit when operating normally, and if Rs is lower than this value, a short circuit may have occurred inside the battery or there may be other problems.

[0251] Here, BattInfo.RS upper limit is the maximum Rs value that the battery can exhibit when operating normally. If Rs is greater than this value, the internal resistance of the battery may have increased, resulting in reduced performance or the end of its lifespan.

[0252] In conclusion, the health of the battery can be indirectly assessed by determining the Rs value using the BattInfo.RS lower bound and BattInfo.RS upper bound.

[0253] At step S504, the SoH can be used to diagnose the condition of an electric vehicle battery and generate a condition diagnosis report. Specifically, SoH can be used to obtain information such as the remaining lifespan of an electric vehicle battery, the degree of aging, capacity loss, output reduction, increased internal resistance, potential failure, and replacement timing, allowing for accurate assessment of battery condition.

[0254] In step S505, the generated battery status diagnostic report can be provided to the user. More specifically, the battery status diagnostic report can be provided via the display unit, a user terminal, or an external server.

[0255] Here, the battery condition diagnosis report may include battery diagnosis information analyzed by the mobile battery diagnosis device (100) based on the results derived from the corresponding battery inspection step, such as appearance information, SOC, SOH, SOB, impedance signal, or other battery inspection information.

[0256] FIG. 23 is a flowchart illustrating a technical feature of initiating a battery diagnosis system according to an internal battery power of a mobile battery diagnosis device according to one embodiment of the present invention.

[0257] Figure 23 illustrates a process of checking the internal battery status of a mobile battery diagnostic device (100) and determining the operating mode of the device accordingly. That is, depending on whether the mobile battery diagnostic device (100) has sufficient or insufficient power, it determines whether it is in normal operation, limited operation, or non-operational state, and visually informs the user of this.

[0258] According to one embodiment of the present invention, a power supply step (S601) for supplying power to a mobile battery diagnostic device is performed, and a step (S602) for determining whether the mobile battery diagnostic device is in mobile mode is performed. Mobile mode refers to a mode in which the device is not connected to an external power source and operates only with an internal battery. If it is not in mobile mode, a step (S603) for changing to a mode for a diagnostic system is performed. The mode for a diagnostic system may be a mode that consumes more power because it is connected to an external power source.

[0259] On the other hand, in the mobile mode, a first voltage comparison step (S604) of comparing the power of the mobile battery diagnosis device with a first reference voltage may be performed. If the power of the mobile battery diagnosis device is lower than the first reference voltage, a step of determining that the mobile battery diagnosis device is inoperable and lighting a red LED indicating the inoperable state of the mobile battery diagnosis device may be performed (S605), if the power of the mobile battery diagnosis device is higher than the first reference voltage, a second voltage comparison step (S606) of comparing the power of the mobile battery diagnosis device with a second reference voltage, a step of determining that the mobile battery diagnosis device is inoperable and lighting a yellow LED indicating the limited operation state of the mobile battery diagnosis device may be performed (S607) if the power of the mobile battery diagnosis device is lower than the second reference voltage, a step of determining that the mobile battery diagnosis device is inoperable and lighting a green LED indicating the normal operation state of the mobile battery diagnosis device may be performed (S608).

[0260] The first reference voltage is the voltage required for the mobile battery diagnostic device (100) to perform its minimum functions, and may be set to, for example, 9 V. If it is below 9 V, the mobile battery diagnostic device (100) may not operate normally and errors may occur. In addition, if it is close to or below 9 V, it indicates that the battery is discharged and requires charging or replacement, and a red LED may be lit to notify the user.

[0261] The second reference voltage is the voltage required for the mobile battery diagnosis device (100) to perform all functions normally, and may be set to, for example, 9.6 V. If the mobile battery diagnosis device (100) has a voltage equal to or higher than the second reference voltage, the battery is sufficiently charged and the device can be used stably. Therefore, if the voltage of the mobile battery diagnosis device (100) is less than 9.6 V, it is determined that the battery power is limited and only some functions can be used, and a yellow LED is turned on to notify the user. If the voltage of the mobile battery diagnosis device (100) is 9.6 V or higher, it is determined that the battery power is sufficient and all functions can be used normally, and a green LED is turned on to notify the user.

[0262] In addition, the mobile battery diagnostic device (100) can further perform a step (S609) of applying power to the Power BD (Power Board) and the Mini PC when the yellow LED or the green LED is lit. The Power BD (Power Board) and the Mini PC can be located inside or outside the mobile battery diagnostic device (100), and the Power BD can stably supply the power required for the Mini PC, and the Mini PC can perform tasks such as data processing and algorithm execution using the power supplied from the Power BD, and provide the measurement results to the user.

[0263] Through this process, the mobile battery diagnostic device (100) can be equipped with conditions for diagnosing an electric vehicle battery in an optimal state.

[0264] FIG. 25 is a drawing showing the configuration of a mobile battery diagnostic device according to one embodiment of the present invention.

[0265] A mobile battery diagnostic device (100) according to one embodiment may include a memory (110), a control unit (120), an input unit (130), a terminal unit (140), a measurement unit (150), a display unit (160), a power supply unit (170), and a built-in battery (172).

[0266] The memory (110) can store various information for diagnosing the status of an electric vehicle battery, and can store program codes, setting information, measurement data, etc.

[0267] The control unit (120) controls the overall operation of the mobile battery diagnosis device (100) and can be responsible for communication with other components. The control unit (120) determines whether the voltage of the internal battery is equal to or higher than the required operating voltage of the mobile battery diagnosis device (100) required for battery condition diagnosis, and if the voltage of the internal battery is equal to or higher than a voltage threshold, obtains a user input requesting condition diagnosis of the electric vehicle battery, measures the insulation resistance value of the electric vehicle battery in response to the user input, and diagnoses the condition of the battery based on the result of comparing the measured insulation resistance value of the electric vehicle battery with a predetermined insulation resistance lower limit value.

[0268] The input unit (130) can be used to receive user input and set the operation of the mobile battery diagnostic device (100) or change the measurement mode, and the terminal unit (140) provides an electrical connection that can measure the status of the electric vehicle battery by connecting to the battery. In addition, the display unit (160) visually shows the user information such as the status diagnosis information and the status diagnosis process of the electric vehicle.

[0269] The measuring unit (150) may include various sensor units and circuit units for diagnosing the status of an electric vehicle battery, and may include, for example, a voltage sensor, a current sensor, a resistance measuring circuit, a temperature sensor, an impedance measuring circuit, a CAN communication interface, etc.

[0270] The power supply unit (170) supplies the power required for the operation of the mobile battery diagnosis device (100), and in particular, the built-in battery (172) supplies the power required for the basic operation of the mobile battery diagnosis device (100), and can operate the device even when an external power source is not connected. The power supply unit (170) can receive power from an external driving power source to operate the mobile battery diagnosis device (100) or charge the built-in battery (172).

[0271] FIG. 26 is a drawing illustrating a flow of technical features for diagnosing the status of a battery connected to a pad according to one embodiment of the present invention, and FIG. 27 is a drawing for explaining the physical nature of a mobile battery diagnosis device according to one embodiment of the present invention.

[0272] Figures 26 and 27 exemplarily show the appearance and process of implementing an actual mobile battery diagnostic device (100). Here, MDZ may be the name of the mobile battery diagnostic device (100).

[0273] In one embodiment, a diagnostic device (MDZ) can be used to diagnose the condition of an electric vehicle battery. The MDZ is a portable device that can diagnose the condition of an electric vehicle battery in a short period of time (within approximately 15 minutes) without charging or discharging the battery. It is connected to the battery's BMS (Battery Management System) and HV (High Voltage) connector for measurement, and can diagnose not only a removed battery but also an on-board battery installed in an electric vehicle. It operates on 220 V AC power or an internal 12 V DC battery, and can provide a user interface (1002) by connecting to a tablet (display unit, 160) via Bluetooth.

[0274] First, the electric vehicle battery is mounted on the electric vehicle battery pad (1001), connected to a diagnostic device (MDZ) and powered on. The diagnostic device then executes software to collect and analyze various battery information. This information may include battery voltage, internal resistance, temperature, and EIS.

[0275] In one embodiment, the diagnostic results can be expressed as a pass or fail for each test item, with a fail indicating a problem with the battery. This allows for the identification of battery performance degradation or abnormalities, and, if necessary, replacement or additional diagnostics.

[0276] In particular, when using a diagnostic device (MDZ), non-destructive testing can be performed with a simple connection without charging or discharging the battery, accurate diagnostic results can be derived in a short period of time, various battery test items can be measured, it can be easily used in the field as a mobile device, and it can provide an intuitive user interface using a tablet, thereby improving the safety and lifespan of electric vehicles and contributing to reducing maintenance costs.

[0277] Unless there is a clear description of the order or sequence of steps constituting the method according to the present invention, the steps may be performed in any appropriate order. The present invention is not necessarily limited to the order in which the steps are described.

[0278] Any use of examples or exemplary terms (e.g., "etc.") in the present invention is merely intended to illustrate the present invention in detail and is not intended to limit the scope of the present invention, unless otherwise defined by the claims. Furthermore, those skilled in the art will appreciate that various modifications, combinations, and variations can be made within the scope of the appended claims or their equivalents, depending on design conditions and factors.

[0279] Any use of examples or exemplary terms (e.g., "etc.") in the present invention is merely intended to illustrate the present invention in detail and is not intended to limit the scope of the present invention, unless otherwise defined by the claims. Furthermore, those skilled in the art will appreciate that various modifications, combinations, and variations can be made within the scope of the appended claims or their equivalents, depending on design conditions and factors.

[0280] Therefore, the idea of ​​the present invention should not be limited to the embodiments described above, and not only the scope of the patent claims described below, but also all scopes equivalent to or equivalently modified from the scope of the patent claims are considered to fall within the scope of the idea of ​​the present invention.

[0281] Meanwhile, although terms indicating directions such as up, down, left, right, front, and back are used in the present invention, it is obvious to those skilled in the art that these terms are only for the convenience of explanation and may vary depending on the location of the target object or the location of the observer.

Claims

1. A battery diagnostic module configured to diagnose a battery; and A battery diagnostic device characterized by including a carrier module that detachably supports the battery diagnostic module and is configured to be movable.

2. In paragraph 1, The above battery diagnostic module, A diagnostic module body detachably coupled to the carrier module; and A battery diagnostic device characterized by including a battery diagnostic unit provided inside the diagnostic module body and connected to the battery and configured to diagnose the battery.

3. In paragraph 2, The above diagnostic module body is, A terminal connection part provided on the upper side of the above diagnostic module body, connected to the battery diagnostic part, and connected to the battery and the measuring part through the same; A gripping part provided on the upper side of the above diagnostic module body and configured in a form that can be gripped by the user; and A battery diagnostic device characterized by including an opening configured to open and close a portion of the diagnostic module body having the terminal connection portion.

4. In paragraph 3, The above carrier module, A carrier body including a mounting portion on which the diagnostic module body is mounted; A moving part provided at the bottom of the carrier body and configured to move the carrier body; and It includes a diagnostic module fixing part which is provided on the carrier body and is connected to the fixing connection part of the diagnostic module body to fix the diagnostic module body to the mounting part, The above diagnostic module fixing part is, A battery diagnostic device characterized in that the terminal connection part is configured to secure the diagnostic module body to the mounting part so that the terminal connection part faces upward.

5. In paragraph 4, The above carrier module, The above fixing part further includes a friction prevention part configured to prevent friction between the diagnostic module body and the fixing part that occurs when the diagnostic module body is fixed to the fixing part. The above friction prevention part is, A battery diagnostic device characterized in that it is provided on at least one of a corner portion of a first surface of the mounting portion that is in contact with the side of the main body of the diagnostic module and a corner portion of a second surface of the mounting portion that is connected in a direction perpendicular to the first surface of the mounting portion and in contact with the lower side of the main body of the diagnostic module.

6. In paragraph 4, The above carrier body is, A battery diagnostic device further comprising a measuring component receiving portion that receives the measuring component therein.

7. In paragraph 4, The above carrier module, A battery diagnostic device characterized in that it further includes a diagnostic module guide portion configured to support the diagnostic module body when the battery diagnostic module is connected to the battery.

8. In paragraph 7, The above-mentioned anchorage is, A first surface that comes into contact with the side of the diagnostic module body when the diagnostic module body is mounted on the mounting portion; A second surface connected in a direction perpendicular to the first surface and in contact with the lower side of the diagnostic module body when the diagnostic module body is seated on the mounting portion; and Including a fixed groove provided in an area where the first surface and the second surface meet, The above diagnostic module guide section, A battery diagnostic device characterized by including an inclined main body part in which the battery diagnostic module is arranged at the upper portion and an end is joined to the fixed groove part and arranged at an angle with respect to the second surface.

9. In paragraph 8, The above carrier module, The above fixing part further includes a friction prevention part configured to prevent friction between the diagnostic module body and the fixing part that occurs when the diagnostic module body is fixed to the fixing part. The above diagnostic module guide section, A battery diagnostic device characterized in that it further includes an inclined support portion configured to support a lower portion of the inclined main body portion by being coupled to a friction prevention portion provided at a corner portion of the second surface.

10. In paragraph 4, The above carrier module, A battery diagnostic device characterized in that it further includes a diagnostic module buffer portion, one end of which is connected to the diagnostic module fixing portion, the other end of which is connected to the fixing connection portion, and configured to elastically support the diagnostic module body with respect to the carrier body.

11. In paragraph 10, The above diagnostic module fixing part is, A first fixing part provided on the carrier body; and A second fixing part is provided on the carrier body and is arranged on the lower side of the first fixing part, The above fixed connection part is, A first connecting part provided in the above diagnostic module body and connected to the first fixing part; and It includes a second connecting part which is provided in the above diagnostic module body and is positioned below the first connecting part and connected to the second fixing part, The above diagnostic module buffer section is, A first buffer member configured to elastically support the lower side of the diagnostic module body relative to the upper side of the carrier body by having one end connected to the first fixing member and the other end connected to the second connecting member; and A battery diagnostic device characterized by including a second buffer member, one end of which is connected to the second fixing member and the other end of which is connected to the first connecting member to elastically support the upper side of the diagnostic module body relative to the lower side of the carrier body.

12. In paragraph 3, The above battery diagnostic module, Further comprising a measuring component guide portion coupled to the above opening portion and configured to support at least a portion of the measuring component connecting between the battery and the terminal connection portion; The above measuring component guide part, A joining part joined to the inner surface of the above opening; and A battery diagnostic device characterized by including a folding part connected to the above-mentioned connecting part, positioned inside the diagnostic module body in a multi-folded state when the above-mentioned opening is closed, and configured to unfold and support the lower end of the above-mentioned measuring part when the above-mentioned opening is opened.

13. A step of selecting and performing a customized connection method according to whether the electric vehicle battery is detachable and whether the cover is dismantled, and then obtaining impedance data of the electric vehicle battery; A step of diagnosing the state of the electric vehicle battery using the measured impedance and generating battery state information; and A step of providing the generated battery status information to a user; A method for diagnosing an electric vehicle battery using a mobile battery diagnostic device including a .

14. In the 13th paragraph, the customized connection method, A method of connecting using a charging terminal of an electric vehicle while the electric vehicle battery is installed (on-board) in the electric vehicle; A connection method using any one of a high-voltage connector, a BMS connector, and a manufacturer connector for an electric vehicle battery at the bottom of the electric vehicle; A method of connecting an electric vehicle battery removed from the above electric vehicle using one of a high-voltage connector, a BMS connector, and a manufacturer connector; and A method of removing the cover of an electric vehicle battery from the electric vehicle and connecting it using internal connection terminals and connectors; A method for diagnosing an electric vehicle battery using a mobile battery diagnostic device including a 15. In the 13th paragraph, the step of obtaining the impedance data of the electric vehicle battery is, It is characterized by obtaining data generated from the electric vehicle battery through the BMS and OBD terminal of the electric vehicle or the battery of the electric vehicle. A method for diagnosing an electric vehicle battery using a mobile battery diagnosis device, characterized in that the impedance data of the electric vehicle battery is obtained through impedance measurement, insulation resistance measurement, DC-IR measurement, and AC-IR measurement.

16. In the 13th paragraph, the step of generating the electric vehicle battery status information is as follows: A step of obtaining user input for entering the type of the electric vehicle battery; An insulation resistance measurement step for measuring the insulation resistance value of the above electric vehicle battery; An impedance measurement step for obtaining the impedance characteristics of the above electric vehicle battery; and A battery status diagnosis step for diagnosing the status of an electric vehicle battery based on a status measurement value of the electric vehicle battery; A method for diagnosing an electric vehicle battery using a mobile battery diagnostic device including a .

17. In the 16th paragraph, the insulation resistance measurement step is, A test voltage setting step for setting a test voltage based on the nominal voltage condition of the electric vehicle battery; and An insulation resistance measurement step of measuring the insulation resistance value of the electric vehicle battery by applying the above-described set test voltage to the electric vehicle battery for a predetermined period of time; A method for diagnosing an electric vehicle battery using a mobile battery diagnostic device characterized by including a.

18. In the 17th paragraph, the test voltage setting step is: If the nominal voltage of the above electric vehicle battery is less than 500 V, the test voltage is set to 500 Vdc, If the nominal voltage of the above electric vehicle battery is 500 V or more and less than 1000 V, the test voltage is set to 1000 Vdc, A method for diagnosing an electric vehicle battery using a mobile battery diagnosis device, characterized in that when the nominal voltage of the electric vehicle battery is 1000 V or higher, the test voltage is set to 2500 Vdc.

19. In the 16th paragraph, the insulation resistance measurement step is, A voltage distribution measurement step of measuring a portion of the voltage of the electric vehicle battery using a voltage divider and estimating the total voltage of the electric vehicle battery using a portion of the voltage of the electric vehicle battery measured by an ideal divider; and An insulation resistance calculation step for calculating the insulation resistance using the total voltage of the above-mentioned measured electric vehicle battery; A method for diagnosing an electric vehicle battery using a mobile battery diagnostic device characterized by including a.

20. In paragraph 19, the voltage distribution measurement step is: Indirectly calculate the insulation resistance corresponding to the nominal voltage of the electric vehicle battery through some of the voltage of the electric vehicle battery measured above, A method for diagnosing an electric vehicle battery using a mobile battery diagnosis device, characterized in that the insulation condition of an electric vehicle battery is evaluated by continuously monitoring a micro-leakage current using a high impedance meter.

21. In paragraph 16, An external inspection step for inspecting the internal pressure status, electrolyte leakage status, gas emission, case status, terminal status, wiring status, insulator system status, and cooling system status of the above electric vehicle battery; and A battery reuse judgment step for determining whether to reuse the electric vehicle battery based on the inspection results of the above appearance inspection step; A method for diagnosing an electric vehicle battery using a mobile battery diagnostic device characterized by further including:

22. In paragraph 16, Connect the above electric vehicle battery to the BMS to measure the cell voltage (B.C_V) of the above electric vehicle battery. cell ), the pack voltage (B_V) of the above electric vehicle battery batt ) and a BMS inspection step of measuring the temperature (B_T) of the electric vehicle battery; A SOC calculation step for calculating the SOC (State of Charge) of the electric vehicle battery based on the type of the electric vehicle battery; and A SOB calculation step for calculating SOB (State Of Balance) based on the above calculated SOC; A method for diagnosing an electric vehicle battery using a mobile battery diagnostic device characterized by further including:

23. In paragraph 15, The cell voltage (B.C_V) of the above electric vehicle battery cell ) is the preset minimum allowable voltage (B.C_V) min ) to maximum allowable voltage (B.C_V) max ) cell voltage judgment step; The pack voltage (B_V) of the above electric vehicle battery batt ) is the preset minimum allowable voltage (B_V) min ) to the maximum allowable voltage (B_V) max ) is in the pack voltage judgment step; A voltage imbalance judgment step between individual modules to determine whether the difference between the sum of the pack voltage and module voltage (Pack / System V - Module * N) of the above electric vehicle battery has an error of less than 1%; The temperature (B_T) of the above electric vehicle battery is lower than the preset minimum allowable temperature (B_T min ) to the maximum allowable temperature (B_T max ) to determine whether the electric vehicle battery temperature is in a predetermined range; and A battery reuse determination step for determining whether to reuse the electric vehicle battery based on the results of the cell voltage determination step, the pack voltage determination step, the voltage imbalance determination step, and the electric vehicle battery temperature determination step; A method for diagnosing an electric vehicle battery using a mobile battery diagnostic device characterized by further including:

24. In paragraph 16, An AC signal applying step of connecting a high voltage relay to the electric vehicle battery and then connecting an alternating current impedance analyzer to the high voltage relay to apply an AC signal to the electric vehicle battery; A step of detecting the voltage and temperature of an electric vehicle battery to which the above AC signal is applied; and An electric vehicle battery reuse determination step for determining whether to reuse the electric vehicle battery based on the result of determining whether the voltage and temperature of the detected electric vehicle battery are within a preset normal range; A method for diagnosing an electric vehicle battery using a mobile battery diagnostic device characterized by further including:

25. In paragraph 16, An EIS data acquisition step for acquiring EIS data of the electric vehicle battery under predetermined EIS measurement conditions; A temperature compensation step for compensating EIS data of the electric vehicle battery based on the measurement temperature under the above EIS measurement conditions; and SOH calculation step of calculating SOH_EIS from the above EIS data; A method for diagnosing an electric vehicle battery using a mobile battery diagnostic device characterized by further including:

26. In paragraph 25, the above-determined EIS measurement conditions are: Minimum frequency condition (B.Freq min ), frequency maximum condition (B.Freq max ) and the size of the AC current to be applied (AC Range). A method for diagnosing an electric vehicle battery using a mobile battery diagnostic device.

27. In paragraph 25, An internal resistance judgment step for judging whether the value of the internal resistance acquired in the above EIS data acquisition step is within the normal range of the internal resistance value of the predetermined electric vehicle battery; and A battery reuse determination step for determining whether to reuse the electric vehicle battery based on the result of determining whether the value of the internal resistance of the electric vehicle battery is within a normal range; A method for diagnosing an electric vehicle battery using a mobile battery diagnostic device characterized by further including:

28. In paragraph 16, A step of determining whether to reuse the electric vehicle battery based on the electric vehicle battery status information; A step of generating a diagnostic report on the results of whether the above electric vehicle battery can be reused; and A step of providing the above diagnostic report through a user interface; A method for diagnosing an electric vehicle battery using a mobile battery diagnostic device characterized by further including:

29. In paragraph 13, A first voltage comparison step for comparing the power of the above-mentioned mobile battery diagnostic device with a first reference voltage; A step of determining that the mobile battery diagnostic device is inoperable when the power of the mobile battery diagnostic device is below the first reference voltage and lighting a red LED indicating the inoperable state of the mobile battery diagnostic device; A second voltage comparison step for comparing the power of the mobile battery diagnostic device with a second reference voltage when the power of the mobile battery diagnostic device is higher than the first reference voltage; A step of determining that the mobile battery diagnostic device is performing a limited operation when the power of the mobile battery diagnostic device is below the second reference voltage and lighting a yellow LED indicating the limited operation performance status of the mobile battery diagnostic device; and A step of determining normal operation when the power of the mobile battery diagnostic device is equal to or higher than the second reference voltage and lighting a green LED indicating the normal operation status of the mobile battery diagnostic device; A method for diagnosing an electric vehicle battery using a mobile battery diagnostic device characterized by further including:

30. An input unit for obtaining user input requesting diagnosis of the condition of an electric vehicle battery; A measuring unit for obtaining an impedance measurement value of the above electric vehicle battery; A connecting part connecting the above electric vehicle battery and the above measuring part; and A control unit which performs a customized connection method according to whether the electric vehicle battery is detached or removed and whether the cover is removed, acquires impedance data of the electric vehicle battery, diagnoses the status of the electric vehicle battery using the measured impedance, generates battery status information, and provides the generated battery status information to a user; A portable battery diagnostic device comprising:

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