Fault detection device and method

Abstract

To provide a failure detecting device for detecting the presence or absence of a failure and the type of failure of a display for displaying a charging state of an electric vehicle, and a failure detecting method using the same.SOLUTION: A failure detecting device 100 for detecting a failure of a display for displaying a charging state of a vehicle battery in response to a control signal includes: an interrupt generating unit 110 for generating an interrupt signal when the control signal satisfies a predetermined event that has already been set; a voltage detecting unit 120 for converting an analog value of the control signal into a digital value and detecting a voltage value of the control signal; and a determining unit 130 for determining at least one of the presence / absence of a failure of the display and a type of failure based on at least one of the presence / absence of operation of the display, the presence / absence of generation of the interrupt signal, and the voltage value of the control signal.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The embodiment relates to a fault detection device and a method thereof. [Background technology]

[0002] Electric vehicle (EV) or plug-in hybrid Plug-In Hybrid Electric Vehicle (PHE) Eco-cars like V) are electric vehicles that are installed at charging stations to charge their batteries. Equipment (Electric Vehicle Supply Equipment, EVS E) is used.

[0003] For this purpose, an electric vehicle charging device (Electric Vehicle Charging The EVCC is installed in the EV and controls the EV and EVSE. and controls the charging of electric vehicles.

[0004] For example, when the EVCC receives a signal from the electric vehicle instructing it to start charging, it starts charging. When a signal to end charging is received from the electric vehicle, the charging is stopped. It can be controlled to do so.

[0005] Charging methods for electric vehicles can be divided into fast charging and slow charging depending on the charging time. When charging, the battery is charged by DC current supplied from the charger, and slow charging In this case, the battery is charged by the AC current supplied to the charger. Chargers used for fast charging are called quick chargers or DC chargers, and those used for slow charging are called DC chargers. Chargers that use this method are called slow chargers or AC chargers.

[0006] On the other hand, electric vehicles are charged with high voltage and current, which increases safety concerns during charging. For this reason, the charging ports of electric vehicles are equipped with LED indicators that show the charging status. The user can check the charging status by checking the LED indicator on the charging port. However, it is not possible to detect faults in the LED display, and even if the user recognizes the fault, the cause of the fault is unknown. The problem is that we cannot know the cause. Summary of the Invention [Problem to be solved by the invention]

[0007] In this example, the presence or absence of a malfunction in the display that displays the charging status of an electric vehicle and the type of malfunction are detected. The present invention relates to a fault detection device that outputs a fault signal and a fault detection method that uses the same.

[0008] The problems to be solved by the embodiments are not limited to these, and include the problems described below. The present invention also includes objectives and effects that can be grasped from the means for solving the problems and embodiments. [Means for solving the problem]

[0009] A fault detection system that detects faults in the display that displays the charging status of the vehicle battery in response to a control signal. In the fault detection device according to the embodiment of the present invention, the control signal is An interrupt generator generates an interrupt signal when a specified event is met, and a A voltage detector that converts the analog value of the control signal into a digital value and detects the voltage value of the control signal. and whether the display operates, whether the interrupt signal is generated, and and determining whether or not the indicator is faulty based on at least one of the voltage values ​​of the control signal. and a determination unit that determines at least one of the types of failure.

[0010] When it is determined that the display is in operation, the determination unit The presence or absence of a fault in the display and the type of fault are determined depending on whether or not the signal is generated and the voltage value of the control signal. You can determine the type.

[0011] The determination unit determines whether the interrupt signal is generated and whether the voltage value of the control signal is greater than or equal to a first threshold. the first threshold and the second threshold are included in the range of If the display is not working properly, the interrupt signal is generated. , the voltage value of the control signal is greater than the first threshold value and less than the second threshold value. If the value is not within the specified range, it can be determined that a malfunction has occurred in the indicator.

[0012] The determination unit determines whether the interrupt signal is generated and whether the voltage value of the control signal is greater than or equal to a first threshold. If the value is smaller than or equal to the value, the fault type of the indicator is determined to be a ground short circuit; If the voltage value of the control signal is greater than or equal to a second threshold value, The type of failure can be determined to be an open cable.

[0013] The determination unit determines whether a malfunction has occurred in the display device if the interrupt signal is not generated. It can be judged that this was the case.

[0014] The determination unit determines whether a voltage value of the control signal is smaller than or equal to a third threshold value. For example, the type of failure of the indicator is determined to be a ground short circuit, and the voltage value of the control signal is equal to or greater than a third threshold value. If it is greater than , the type of failure of the indicator can be determined as a battery short circuit.

[0015] When it is determined that the display device is not in operation, the determination unit determines whether the voltage value of the control signal is Accordingly, it is possible to determine whether or not the indicator is malfunctioning and the type of malfunction.

[0016] The determination unit determines whether the voltage value of the control signal is smaller than or equal to a fourth threshold value. If the voltage value of the control signal is equal to or greater than the fourth threshold value, the display is determined to be in a normal state. If it is greater than , the type of failure of the indicator can be determined as a battery short circuit.

[0017] A fault detection system that detects faults in the display that displays the charging status of the vehicle battery in response to a control signal. In a fault detection method using an output device, the fault detection method according to an embodiment of the present invention includes: generating an interrupt signal when the signal satisfies a predefined event; and converting the analog value of the control signal into a digital value to detect the voltage value of the control signal. and determining whether the display operates and whether the interrupt signal is generated. and determining whether or not the indicator is faulty based on at least one of the voltage values ​​of the control signal. and determining at least one of the fault type.

[0018] determining whether or not the indicator is malfunctioning and the type of malfunction; a step of determining whether the display is operating; and a step of determining whether the display is operating. When it is determined that the interrupt signal has occurred, The display is determined based on at least one of the presence or absence of generation and the voltage value of the control signal. determining at least one of the presence or absence of a fault and the type of the fault; If it is determined that the display is not in operation, the display is turned on based on the voltage value of the control signal. and determining at least one of the presence or absence of a malfunction and the type of malfunction. do. [Effects of the Invention]

[0019] According to an embodiment of the present invention, the display can be detected without installing additional hardware for fault detection. The advantage is that it is possible to easily detect whether or not a display is faulty and the type of fault through analysis of the control signal. do.

[0020] The various advantageous and beneficial effects of the present invention are not limited to those described above, but may be varied in accordance with the specific This will be more easily understood in the course of explaining the embodiments. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a diagram illustrating a fault detection system using a fault detection device according to an embodiment of the present invention.

[0022] [Figure 2] 1 is a configuration diagram of a fault detection device according to an embodiment of the present invention;

[0023] [Figure 3] 1 is a diagram illustrating a first example of a determination unit according to an embodiment of the present invention;

[0024] [Figure 4] 10 is a diagram illustrating a second example of a determination unit according to an embodiment of the present invention.

[0025] [Figure 5] 10 is a diagram illustrating a third embodiment of a determination unit according to an embodiment of the present invention.

[0026] [Figure 6] 3 is a flowchart of a fault detection method according to an embodiment of the present invention.

[0027] [Figure 7] 7 is a flowchart showing the step S640 of FIG. 6 in detail.

[0028] [Figure 8] 8 is a flowchart showing step S643 of FIG. 7 in detail.

[0029] [Figure 9] 8 is a flowchart showing step S644 of FIG. 7 in detail.

[0030] [Figure 10] 8 is a flowchart showing step S645 of FIG. 7 in detail. DETAILED DESCRIPTION OF THE INVENTION

[0031] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0032] However, the technical idea of ​​the present invention is not limited to some of the embodiments described, and The present invention can be embodied in various different forms, and variations between the embodiments are possible within the scope of the technical concept of the present invention. One or more of the components can be selectively combined or substituted for use.

[0033] Furthermore, the terms used in the examples of the present invention (including technical and scientific terms) are clearly Unless otherwise defined and described, those skilled in the art will understand that It can be interpreted as a commonly understood meaning, similar to a dictionary definition. The meaning of commonly used terms should be interpreted taking into account the contextual meaning of the relevant art. It should be possible.

[0034] Furthermore, the terms used in the examples of the present invention are intended to explain the examples, and It is not intended to limit clarity.

[0035] In this specification, the singular can also include the plural unless the phrase specifically states otherwise, such as "A and and (and) at least one (or more) of B and C. It may include one or more of all combinations of A, B, and C.

[0036] In addition, in describing the components of the embodiment of the present invention, first, second, A, B, (a), Terms such as (b) can be used.

[0037] These terms are used to distinguish the component from other components, and the terms The present invention is not limited to the essence, order, or procedure of the components.

[0038] It is also noted that a component is "coupled," "connected," or "connected" to another component. When mounted, the component is not directly connected, coupled, or connected to any other component. Not only when the component is connected to other components, but also when the component is connected to other components or when the component is connected to other components. This also includes cases where the terms "connected," "coupled," or "connected" are used interchangeably.

[0039] In addition, it is assumed that it is formed or placed "above or below" each component. When described above, above or below refers to the area where two components are in direct contact with each other. Not only when one or more other components are formed or placed between the two components, Also, when it is expressed as "upper" or "lower," it is a single structure. It can mean not only the upward direction but also the downward direction based on the constituent element.

[0040] FIG. 1 is a diagram showing a fault detection system using a fault detection device according to an embodiment of the present invention. do.

[0041] Electric vehicles use fault codes (DTC, Diagnosis and Treatment) to diagnose faults in the components that make up the vehicle. The present invention requires a strict troubleshooting code. The fault detection system is an indicator that shows the battery charge status of an electric vehicle when the electric vehicle is being charged. The information can be detected to determine a fault code to detect 40 fault conditions.

[0042] Referring to FIG. 1, a fault detection system according to an embodiment of the present invention includes a regulator 10, a power supply The flow restrictor 20 may include a PWM controller 30, a display 40, and a microcontroller 50. do.

[0043] The regulator 10 can be a device that stabilizes the voltage. The regulator 10 can control the input DC voltage so that it can be output stably. For example, The regulator 10 converts the DC voltage input from the converter It can output a stabilized DC voltage of 12V.

[0044] The current limiter 20 receives the input from the regulator 10. When the current due to the DC voltage applied exceeds a preset level, the device cuts off the flow of current. The current limiter 20 is disposed between the regulator 10 and the PWM controller 30. When the current due to the DC voltage input from the regulator 10 exceeds the preset value, When the voltage is high, the current flow is interrupted, and the output voltage of the regulator 10 is controlled by PWM. For example, the voltage 12 input from the regulator 10 can be controlled so as not to be input to the regulator 30. When the current due to the DC voltage of [V] exceeds 20 [mA], the current will be cut off. This has the advantage of protecting the PWM controller 30 from overcurrent.

[0045] The PWM controller 30 controls the input of the display 40. The control signal may be a pulse width modulated signal. The PWM controller 30 may be a control signal according to the output of the regulator 10. The control signal is generated based on the input DC voltage and the control command output by the microcontroller 50. The PWM control signal generated by the PWM controller 30 is For example, if the regulator 10 outputs a 12V DC voltage, When a DC voltage of 12V is output, the PWM controller 30 generates a control signal of 12V. It can be achieved.

[0046] The indicator 40 responds to the control signal output by the PWM controller 30. The display 40 can display the charging status of the vehicle battery. The display may indicate any one of the states of not charging, charging, and charging preparation. The charging status and the charging readiness status are examples of the charging status of the vehicle battery. According to an embodiment of the present invention, the indicator 40 may also indicate various states of charge of an electric vehicle. The indicator 40 may be implemented by an LED element.

[0047] The microcontroller (Micro Controller Unit) 50 controls A command may be generated and sent to the PWM controller 30. At this time, the control command may be a voltage of 5 [V]. The microcontroller 50 may be a PWM signal having a magnitude of The microcontroller 30 may receive control signals to be sent to the display 40. The control signal can be input through two input terminals. The control signal input through the input terminal can be used to detect the voltage value, and the two input terminals The control signal input through the second input terminal of the The first input terminal may be an ADC port, and the second input terminal may be an ADC port. The input terminal may be an interrupt port. The C port can be continuously awake, and the interrupt port can be woken up at a predetermined interval. It can be done.

[0048] As shown in FIG. 1, a microcontroller 50 includes a fault detection system according to an embodiment of the present invention. The fault detection device 100 may be implemented via a microcontroller 50. The fault detection device 100 may be, but is not limited to, an algorithm for PWM control. The control signal sent from the controller 30 to the display 40 is analyzed to determine whether or not the display 40 is faulty. The fault detection device 100 can determine at least one of the following types. will be explained in detail with reference to the following drawings.

[0049] FIG. 2 is a configuration diagram of a fault detection device according to an embodiment of the present invention.

[0050] Referring to FIG. 2, a fault detection device 100 according to an embodiment of the present invention includes an interrupt generation unit. The circuit may include a voltage detection unit 110, a voltage detection unit 120, and a determination unit 130.

[0051] The interrupt generator 110 generates an interrupt when the control signal satisfies a predetermined event. The control signal input to the interrupt generator is Input via the second input terminal of the microcontroller 50, i.e., the interrupt port The interrupt generator 110 may generate an interrupt signal in response to a change in the voltage value of the control signal. Predetermined events such as presence or absence, presence or absence of a rising edge, or presence or absence of a falling edge For example, the interrupt generator 110 may generate an interrupt signal by receiving a control signal When a falling edge is detected from the obtain.

[0052] The voltage detection unit 120 converts the analog value of the control signal into a digital value to obtain the voltage value of the control signal. The control signal input to the voltage detection unit 120 is It may be a control signal input via the first input terminal, i.e., the ADC port. The output unit 120 samples and quantizes the control signal, which is an analog signal. Sequences such as Quantization and Coding The voltage detector 120 may convert the converted voltage into a digital signal. By monitoring the control signal, the voltage value of the control signal can be detected.

[0053] The determination unit 130 determines whether the display 40 is operating, whether an interrupt signal is generated, and whether a control signal is generated. The presence or absence of a malfunction of the indicator 40 and the extent of the malfunction are determined based on at least one of the voltage values ​​of the control signals. At this time, whether or not the indicator 40 is operating can be determined by the For example, the determination unit 130 may receive the input from the microcontroller 50. On the other hand, a trigger signal can be input from the controller 50 regarding whether the indicator 40 is operating or not. The microcontroller 50 inputs the operation or non-operation of the display 40 to the PWM controller 30. For example, the determination unit 130 may determine whether the PWM controller 30 is in a normal or abnormal state based on a control command. The control command can be analyzed to determine whether the display 40 is operating or not.

[0054] According to an embodiment of the present invention, the determination unit 130 determines whether the display 40 is operating, whether an interrupt is generated, and The presence or absence of a malfunction of the indicator 40 is determined based on whether or not a signal is generated and the voltage value of the control signal. It may include three sequences that determine the type of

[0055] The first sequence is when the display 40 is operating and an interrupt signal is generated. The voltage value of the control signal is compared with a preset threshold value to determine whether or not the indicator 40 is faulty. It may refer to the process of the determination unit 130 determining the type of failure.

[0056] The second sequence is when the indicator 40 is active and no interrupt signal is generated. In this case, the voltage value of the control signal is compared with a preset threshold value to determine whether or not the indicator 40 is faulty. It may refer to the process of the determination unit 130 determining the type of failure.

[0057] In the third sequence, when the display 40 is not operating, the voltage value of the control signal is set to a preset value. A determination unit 130 compares the detected value with a threshold value to determine whether or not the display 40 is faulty and the type of fault. This can mean the process of

[0058] In the first sequence, two thresholds (first and second thresholds) are used. The second and third sequences each have one threshold (third threshold and fourth thresholds) can be used. The four thresholds may be set to the same value. The second threshold is set to a value greater than the first threshold. A different value can be set.

[0059] Each sequence of the determination unit 130 will be described in detail with reference to the following drawings.

[0060] FIG. 3 is a diagram illustrating a first embodiment of a determination unit according to an embodiment of the present invention.

[0061] FIG. 3 shows the first sequence in which the determination unit 130 determines whether or not the display 40 is faulty and the extent of the fault. The process for determining the type is shown below.

[0062] The first sequence is when the display 40 is operating and an interrupt signal is generated. When the determination unit 130 determines that the display device 40 is in operation, the determination unit 130 The presence or absence of a malfunction of the indicator 40 is determined depending on whether or not a put signal is generated and the voltage value of the control signal. Be able to determine the type of disability.

[0063] Specifically, the determination unit 130 determines whether an interrupt signal is generated and the voltage value of the control signal is a first value. If the value is greater than the threshold value and less than the second threshold value, the indicator 40 is normal. It can be judged that it works properly.

[0064] Meanwhile, the determination unit 130 determines whether the interrupt signal is generated and the voltage value of the control signal is equal to or exceeds the first threshold. If the value is not within the range of the first threshold and the second threshold, the indicator 40 will It can be determined that a fault has occurred.

[0065] If it is determined that a malfunction has occurred, the determination unit 130 determines the type of malfunction of the display device 40. Specifically, the determination unit 130 determines whether an interrupt signal is generated and whether the voltage value of the control signal is is less than or equal to the first threshold, the fault type of the indicator 40 is determined to be a short circuit to ground. If the voltage value of the control signal is greater than or equal to the second threshold value, the indicator The fault type 40 can be determined to be an open cable.

[0066] Figure 3 shows the case where the first threshold is set to 2 [V] and the second threshold is set to 13 [V]. The determination unit 130 determines that the voltage value of the control signal is between 2 [V] and 13 [V]. , it can be determined that the display 40 is operating normally. The determination unit 130 determines whether the voltage value of the control signal is less than or equal to 2 [V]. In this case, the indicator 40 may fail due to a short circuit to ground. The determining unit 130 determines whether the voltage value of the control signal is greater than 13 [V]. or in an equal range, the indicator 40 will indicate Cable Open. It can be determined that a failure occurred due to this.

[0067] FIG. 4 is a diagram illustrating a second embodiment of a determination unit according to an embodiment of the present invention.

[0068] FIG. 4 shows the second sequence in which the determination unit 130 determines whether or not the display 40 is faulty and the extent of the fault. The process for determining the type is shown below.

[0069] The second sequence is when the indicator 40 is active and no interrupt signal is generated. The determination unit 130 determines whether the display 40 is in operation but the interrupt signal is not present. If it is not generated, it can be determined that a malfunction has occurred in the display 40.

[0070] If it is determined that a fault has occurred, the determination unit 130 determines whether the voltage value of the control signal is equal to or greater than the third threshold. If the value is smaller than or equal to the value, the type of fault of the indicator 40 is determined to be a ground short circuit, and the control If the voltage value of the control signal is greater than the third threshold, the indicator 40 displays the type of failure as battery failure. It can be considered a short circuit.

[0071] 4 shows a case where the third threshold value is set to 2 [V]. When the voltage value of the control signal is less than or equal to 2 [V], the indicator 4 0 can be judged to be a fault caused by a short to ground. The determination unit 130 determines whether the display is in a range where the voltage value of the control signal is greater than 2 [V]. It was determined that the device 40 had a short circuit to the battery. I can say no.

[0072] FIG. 5 is a diagram illustrating a third embodiment of a determination unit according to an embodiment of the present invention.

[0073] FIG. 5 shows the third sequence in which the determination unit 130 determines whether or not the display 40 is faulty and the extent of the fault. The process for determining the type is shown below.

[0074] The third sequence may be performed when the display 40 is not operating. , whether or not the indicator 40 is faulty based on the voltage value of the control signal without considering the interrupt signal. and the type of failure can be determined.

[0075] The determination unit 130 determines whether the voltage value of the control signal is smaller than or equal to the fourth threshold value. When the voltage value of the control signal is greater than the fourth threshold value, the indicator 40 is determined to be in a normal state. If it is larger, the type of failure of the indicator 40 can be determined to be a battery short circuit.

[0076] 5 shows a case where the fourth threshold value is set to 2 [V]. When the voltage value of the control signal is less than or equal to 2 [V], the indicator 4 0 indicates a normal state. The determination unit 130 determines whether the voltage value of the control signal is 2 [V]. If the battery voltage is in the range greater than 100 V, the indicator 40 will indicate a short to battery condition. It can be determined that a failure due to TT occurred.

[0077] FIG. 6 is a flowchart of a fault detection method according to an embodiment of the present invention.

[0078] Referring to FIG. 6, a fault detection method using the fault detection device 100 according to an embodiment of the present invention is , S610, S620, S630 and S640.

[0079] First, the fault detection device 100 receives a control signal (S610). The control signal may refer to a control signal that the PWM controller 30 sends to the display 40 .

[0080] The interrupt generator 110 of the fault detection device 100 generates a predetermined control signal. If an event is satisfied, an interrupt signal may be generated (S620).

[0081] The voltage detection unit 120 of the fault detection device 100 converts the analog value of the control signal into a digital value. The voltage value of the control signal can be detected (S630).

[0082] The determination unit 130 of the fault detection device 100 determines whether the display 40 is operating, whether an interrupt signal is received, The fault of the indicator 40 is determined based on at least one of the presence or absence of the generation of the signal and the voltage value of the control signal. At least one of the presence or absence of a fault and the type of the fault can be determined (S640).

[0083] FIG. 7 is a flowchart showing the step S640 of FIG. 6 in detail.

[0084] Referring to FIG. 7, step S640 in FIG. 6 corresponds to steps S641 to S645. may include:

[0085] First, the determination unit 130 determines whether the display device 40 is operating (S641).

[0086] If it is determined that the display 40 is in operation, the determination unit 130 generates an interrupt signal. It can be determined whether the information has been stored (S642).

[0087] If it is determined that an interrupt signal is generated, the determination unit 130 executes the first sequence. By this, it is possible to determine whether or not there is a malfunction in the display 40 and the type of malfunction (S643).

[0088] On the other hand, if it is determined that the interrupt signal is not generated, the determination unit 130 The sequence determines whether or not the display 40 is faulty and the type of fault (S644). .

[0089] If it is determined that the display 40 is not in operation, the determination unit 130 outputs an interrupt signal. Regardless of whether or not the display 40 is generated, the third sequence determines whether or not the display 40 is faulty and the extent of the fault. Able to determine types (S645).

[0090] FIG. 8 is a flowchart showing the details of step S643 in FIG.

[0091] Referring to FIG. 8, step S643 in FIG. 7 is a sequence of steps S643-1 to S643-5. The method may include steps.

[0092] First, the determination unit 130 determines whether the voltage value of the control signal is between the first threshold value and the second threshold value. It is possible to determine whether or not the

[0093] If it is determined that the voltage value of the control signal is between the first threshold value and the second threshold value, The disconnecting unit 130 can determine that the display 40 operates normally (S643-2).

[0094] On the other hand, it is determined that the voltage value of the control signal is not between the first threshold value and the second threshold value. Then, the determination unit 130 can determine that the display device 40 has failed (S643-3).

[0095] At this time, if the voltage value of the control signal is smaller than or equal to the first threshold value, the determination The unit 130 can determine that the type of failure of the indicator 40 is a ground short circuit (S643-4 ).

[0096] If the voltage value of the control signal is greater than or equal to the second threshold value, the determining unit 130 can determine that the type of failure of the indicator 40 is cable open (S643- 5).

[0097] FIG. 9 is a flowchart showing the details of step S644 in FIG.

[0098] Referring to FIG. 9, step S644 in FIG. 7 is a sequence of steps S644-1 to S644-3. The method may include steps.

[0099] First, the determining unit 130 determines whether the voltage value of the control signal is less than or equal to the third threshold value. Able to identify squid (S644-1).

[0100] If the voltage value of the control signal is less than or equal to the third threshold value, the determination unit 130 , a fault occurs in the display 40, and the type of fault can be determined to be a ground short circuit (S 644-2).

[0101] On the other hand, if the voltage value of the control signal is greater than the third threshold value, the determination unit 130 A fault occurred in the battery 0, and the type of fault can be determined to be a battery short circuit (S64 4-3).

[0102] FIG. 10 is a flowchart showing the details of step S645 in FIG.

[0103] Referring to FIG. 10, steps S645 in FIG. 7 are S645-1 to S645-3. The method may include the steps of:

[0104] First, the determining unit 130 determines whether the voltage value of the control signal is smaller than or equal to the fourth threshold value. Able to identify squid (S645-1).

[0105] If the voltage value of the control signal is less than or equal to the fourth threshold value, the determination unit 130 Therefore, it can be determined that the display 40 is in a normal state (S645-2).

[0106] On the other hand, if the voltage value of the control signal is greater than the fourth threshold value, the determination unit 130 A fault occurred in the battery 0, and the type of fault can be determined to be a battery short circuit (S64 5-3).

[0107] According to an embodiment of the present invention, the display can be detected without installing additional hardware for fault detection. The advantage is that it is possible to easily detect whether or not a display is faulty and the type of fault through analysis of the control signal. do.

[0108] The term "part" used in this embodiment refers to software or FPGA (Field Programmable Gate Array). hardware such as ASICs or ASICs A "part" refers to a software component, and a "part" performs a certain role. It is not limited to software or hardware. The present invention may be configured to include a recording medium that can be used to reproduce one or more processors. Therefore, as an example, the term "~ unit" may be a software component. , object-oriented software components, such as class components and task components. components, processes, functions, attributes, procedures, subroutines, and program code Segments, drivers, firmware, microcode, circuits, data, databases Contains data structures, tables, arrays, and variables. The functions described may be combined into fewer components and parts, or may be implemented using additional It can be further separated into components and “units.” Furthermore, components and “units” can be used to refer to devices or or security multimedia card to regenerate one or more CPUs It can be realized like this.

[0109] The above description has been centered on the examples, but these are merely examples and do not limit the present invention. However, a person having ordinary skill in the art to which the present invention pertains would understand the essence of this embodiment. Various modifications and applications not exemplified above are possible within the scope of the intended characteristics. For example, each component specifically shown in the embodiment can be modified and implemented. The differences relating to such modifications and applications are defined in the appended claims. It should be construed as being included within the scope of the present invention.

Claims

1. 1. A fault detection device for detecting a fault in an indicator that displays the state of charge of a vehicle battery in response to a control signal, an interrupt generator that generates an interrupt signal in response to the control signal; a voltage detection unit that converts the control signal and detects a voltage value of the control signal; and a determination unit that determines at least one of whether or not the indicator has a malfunction and the type of malfunction, The determination unit If it is determined that the indicator is not active, a fault detection device for determining whether or not the indicator is faulty and the type of the fault according to the voltage value of the control signal;

2. The determination unit When it is determined that the indicator is active, 2. The fault detection device according to claim 1, wherein the presence or absence of a fault in the indicator and the type of the fault are determined according to whether the interrupt signal is generated and the voltage value of the control signal.

3. The determination unit When the interrupt signal is generated and the voltage value of the control signal is greater than a first threshold value and less than a second threshold value that is greater than the first threshold value, the display device is determined to operate normally; 3. The fault detection device according to claim 2, wherein when the interrupt signal is generated and the voltage value of the control signal is not within a range greater than the first threshold value and less than the second threshold value, it is determined that a fault has occurred in the display.

4. The determination unit If the interrupt signal is generated and the voltage value of the control signal is less than or equal to a first threshold, the type of failure of the indicator is determined to be a ground short circuit; 4. The fault detection device according to claim 3, wherein if the voltage value of the control signal is greater than or equal to a second threshold value, the fault type of the indicator is determined to be an open cable.

5. The determination unit 3. The fault detection device according to claim 2, wherein if the interrupt signal is not generated, it is determined that a fault has occurred in the display device.

6. The determination unit If the voltage value of the control signal is less than or equal to a third threshold value, the type of failure of the indicator is determined to be a ground short circuit; 6. The fault detection device according to claim 5, wherein if the voltage value of the control signal is greater than a third threshold value, the type of fault of the indicator is determined to be a battery short circuit.

7. The determination unit If the voltage value of the control signal is less than or equal to a fourth threshold value, it is determined that the indicator is in a normal state; 2. The fault detection device according to claim 1, wherein if the voltage value of the control signal is greater than a fourth threshold value, the fault type of the indicator is determined to be a battery short circuit.

8. 1. A fault detection method using a fault detection device for detecting a fault in an indicator that displays the state of charge of a vehicle battery in response to a control signal, comprising: generating an interrupt signal in response to the control signal; converting the control signal to detect a voltage value of the control signal; and determining at least one of whether or not the indicator has a malfunction and the type of malfunction; The step of determining at least one of whether or not the indicator has a malfunction and the type of the malfunction, determining whether the indicator is operating; and and if it is determined that the indicator is not in operation, determining at least one of whether or not the indicator is faulty and the type of the fault based on the voltage value of the control signal.

9. The step of determining at least one of whether or not the indicator has a malfunction and the type of the malfunction, 9. The fault detection method of claim 8, further comprising the step of determining, when it is determined that the display is operating and when it is determined that the interrupt signal has been generated, whether or not the display is faulty and the type of the fault based on at least one of whether or not the interrupt signal has been generated and the voltage value of the control signal.

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