Failure detecting device and method thereof

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 fault detection method. [Background technology]

[0002] Electric Vehicle (EV) or Plug-in Hybrid Plug-In Hybrid Electric Vehicle (PHE Eco-cars such as 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, the electric vehicle charging device The EVCC (Electrical Vehicle Control Controller) 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 an electric vehicle 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 the direct current supplied by the charger, and slow charging In this case, the battery is charged by the alternating current supplied to the charger. Therefore, Chargers used for quick charging are called quick chargers or DC chargers, while 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 displays that show the charging status. The charging port is equipped with a charger, and the user can check the charging status by checking the LED indicator on the charging port. However, it is not possible to detect failures in the LED display, and even if the user is aware of the failure, the cause of the failure is unknown. The problem is that we cannot know the cause. Summary of the Invention [Problem to be solved by the invention]

[0007] In the embodiment, the presence or absence of a malfunction of a display that displays the charging state of an electric vehicle and the type of the malfunction are examined. The present invention relates to a fault detection device which outputs a fault signal and a fault detection method using the same.

[0008] Problems to be solved by the embodiments are not limited to those described above, but include the following problems: The present invention also includes objectives and effects that can be understood from the means for solving the problem and embodiments. [Means for solving the problem]

[0009] A fault detection device that detects a fault 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 preset. An interrupt generator generates an interrupt signal when a certain event is satisfied. 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 for determining at least one of the types of failure.

[0010] When it is determined that the display is in operation, the determination unit outputs the interrupt signal The presence or absence of a malfunction of the display and the type of malfunction are determined according to the presence or absence of the generation 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 a voltage value of the control signal is greater than a first threshold. the first threshold value is greater than the first threshold value and less than a second threshold value that is greater than the first threshold value If the display is turned on, it is determined that the display is operating normally and 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 measured value is not within the acceptable range, it can be determined that a malfunction has occurred in the display.

[0012] The determination unit determines whether the interrupt signal is generated and whether a voltage value of the control signal is greater than a first threshold. If the detected value is less than or equal to the detected value, the type of fault of the indicator is determined to be a short circuit to ground; If the voltage value of the control signal is greater than or equal to a second threshold value, the indicator 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 0.05, 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 a voltage value of the control signal. Accordingly, it is possible to determine whether or not the display is malfunctioning and the type of malfunction.

[0016] The determination unit determines whether a 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 a fourth threshold value, the display is determined to be in a normal state. If it is greater than 0.05, the type of failure of the indicator can be determined as a battery short circuit.

[0017] A fault detection device that detects a fault 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 an analog value of the control signal into a digital value to detect a 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 display is malfunctioning and the type of malfunction; The method includes a step of determining whether the display is in operation or not, and when it is determined that the display is in operation, When it is determined that the interrupt signal has occurred, the 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. Effect of the Invention

[0019] According to an embodiment of the present invention, the display can be operated without installing additional hardware for fault detection. It has the advantage that it is easy to detect whether or not a display is broken and what type of failure it is through the analysis of control signals. do.

[0020] The various and beneficial advantages and 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 describing the embodiments. [Brief description of the drawings]

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

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

[0023] [Diagram 3] 4 is a diagram illustrating a first embodiment of a determination unit according to an embodiment of the present invention.

[0024] [Figure 4] 11 is a diagram illustrating a second embodiment of a determination unit according to an embodiment of the present invention.

[0025] [Diagram 5] 13 is a diagram illustrating a third embodiment of a determination unit according to an embodiment of the present invention.

[0026] [Figure 6] 2 is a flowchart of a fault detection method according to an embodiment of the present invention.

[0027] [Figure 7] 7 is a flowchart showing 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 PREFERRED EMBODIMENTS

[0031] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 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. The present invention may be embodied in various different forms, and the technical concept of the present invention may be included within the scope of the present invention. One or more of the components may be selectively combined or substituted for use.

[0033] In addition, the terms (including technical and scientific terms) used in the embodiments of the present invention are clearly Unless otherwise defined and described, those skilled in the art will understand that the present invention is It can be interpreted as a commonly understood meaning, like a term defined in a dictionary. Generally used terms should be interpreted in light of the context 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 the clarity.

[0035] In this specification, the singular can include the plural, unless the phrase specifically states otherwise, and includes "A and When it is described as "A and (B) 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 term The present invention is not limited to the nature, order, or procedure of the components.

[0038] And, when a component is described as being "connected," "coupled," or "connected" to another component, When mounted on a device, 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 "connect," "couple," or "connect" are used interchangeably.

[0039] In addition, it is assumed that the components are 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 problem caused by the embodiment of the present invention requires an agnostic trouble code. The fault detection system is an indicator that shows the battery charge status of an electric vehicle when charging the electric vehicle. It is possible to detect information to determine fault codes 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, the PWM controller 30, the indicator 40 and the microcontroller 50 may be included. do.

[0043] The regulator 10 may 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 12 V.

[0044] The current limiter 20 receives the input from the regulator 10. When the current caused by 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 a preset value, When the current flow is interrupted, the output voltage of the regulator 10 is PWM controlled. For example, the voltage 12 input from the regulator 10 can be controlled so as not to be input to the power supply 30. If the current caused by a 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 Modulation (PWM) signal. The PWM controller 30 may be a control signal according to the output of the regulator 10. A 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 can be used to control the regulator 10. For example, the regulator 10 may output a 12V DC voltage. When a DC voltage of 12 V is output, the PWM controller 30 generates a control signal of 12 V. 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 preparing to charge. 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 charging states of the electric vehicle. The indicator 40 may be implemented by an LED element.

[0047] The microcontroller 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-controlled signal having a magnitude of The microcontroller 50 may receive a control signal that the controller 30 sends 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 A control signal input through the second input terminal of the device generates an interrupt signal. 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 awake at a predetermined period. It can be done.

[0048] As shown in FIG. 1, a microcontroller 50 includes a fault detection device according to an embodiment of the present invention. The fault detection device 100 may include 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 control device 30 to the display device 40 is analyzed to determine whether or not the display device 40 is faulty and The fault detection device 100 can determine at least one of the following types: will be described 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 device. The control unit 100 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 preset event. The control signal input to the interrupt generating unit 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. by predefined events such as presence or absence, rising edge presence or absence, falling edge presence or absence For example, the interrupt generator 110 may generate an interrupt signal based on 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 through a digital signal processing circuit. By monitoring the control signal, the voltage value of the control signal can be detected.

[0053] The determination unit 130 determines whether the display unit 40 is in operation, 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 degree of the malfunction are determined based on at least one of the voltage values ​​of the control signals. At least one of the types can be determined. At this time, the presence or absence of the operation of the display 40 is determined by the For example, the determination unit 130 may receive the input from the microcontroller 50. On the other hand, a trigger signal regarding the operation or non-operation of the display 40 can be input from the controller 50. The microcontroller 50 inputs the operation status of the display 40 to the PWM controller 30. For example, the determination unit 130 may determine whether the PWM control unit 30 is in a normal operating 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 in operation, The presence or absence of a malfunction of the indicator 40 is determined based on the presence or absence of a signal generation and the voltage value of the control signal. The sequence 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 display 40 is operating 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 the indicator 40 is faulty and 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 preset. A determination unit 130 that compares the detected value with a threshold value and determines whether or not the display 40 is malfunctioning and the type of malfunction. This may refer to 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 (the third threshold and a fourth threshold value) may be used. In this case, the first threshold value, the third threshold value, and the fourth threshold value may 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 for explaining a first embodiment of a determination unit according to an embodiment of the present invention.

[0061] FIG. 3 is a diagram showing a first sequence in which the determination unit 130 determines whether or not the display 40 is malfunctioning and the extent of the malfunction. The process of determining the type is shown.

[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 unit 40 is in operation, the determination unit 130 performs an interactive The presence or absence of a malfunction of the indicator 40 is detected depending on whether or not a prompt 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 the interrupt signal is generated and the voltage value of the control signal is a first If the value is within the range larger than the threshold value and smaller than the second threshold value, the display 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 display a fault. 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 a voltage value of a control signal is If 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 display 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]. When the voltage value of the control signal is between 2 [V] and 13 [V], the determination unit 130 Therefore, 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 display 40 may fail due to a short circuit to ground. The determination unit 130 determines whether the voltage value of the control signal is greater than 13 [V]. or in the equal range, the indicator 40 indicates 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 is a diagram showing a second sequence in which the determination unit 130 determines whether or not the display 40 is malfunctioning and the extent of the malfunction. The process of determining the type is shown.

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

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

[0071] In FIG. 4, 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 indicates that a fault has occurred due to a short to ground. When the voltage value of the control signal is in a range greater than 2 [V], the determination unit 130 determines whether the display It was determined that the device 40 had a failure due to a short circuit to the battery. I can say no.

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

[0073] FIG. 5 is a flow chart showing the process in which the determination unit 130 determines whether or not the display 40 is malfunctioning and the extent of the malfunction by the third sequence. The process of determining the type is shown.

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

[0075] If the voltage value of the control signal is less than or equal to the fourth threshold value, the determination unit 130 When the voltage value of the control signal is greater than the fourth threshold value, the display 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] In FIG. 5, 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]. When the battery voltage is in the range larger than 10 V, the indicator 40 indicates a short to battery It can be determined that a failure due to TT occurred.

[0077] FIG. 6 is a flow chart 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 may receive 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 control signal based on a preset predetermined 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 judgment unit 130 of the fault detection device 100 judges whether the display 40 is in operation, the interrupt signal The display 40 is determined to have a fault based on at least one of the presence or absence of generation of the control 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 is replaced by 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 determines whether an interrupt signal is generated. It can be determined whether the above has been done (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 the malfunction (S643).

[0088] On the other hand, if it is determined that the interrupt signal is not generated, the determination unit 130 The sequence can determine whether or not the display 40 is malfunctioning and the type of malfunction (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 step S643 of FIG. 7 in detail.

[0091] Referring to FIG. 8, step S643 in FIG. 7 is 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 shutdown 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. As a result, 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 less than or equal to the first threshold value, the determination The unit 130 can determine that the type of failure of the display 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 determination unit 130 can determine that the type of failure of the display 40 is cable open (S643- 5).

[0097] FIG. 9 is a flowchart showing step S644 of FIG. 7 in detail.

[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 determination unit 130 determines whether the voltage value of the control signal is smaller 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 It can be determined that a fault has occurred in the display 40 and that the type of fault is 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 has 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 step S645 of FIG. 7 in detail.

[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 determination 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 has 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 operated without installing additional hardware for fault detection. It has the advantage that it is easy to detect whether or not a display is broken and what type of failure it is through the analysis of control signals. do.

[0108] The term "part" used in this embodiment refers to software or FPGA (Field Programmable Gate Array). ASIC (Advanced Programmable Gate Array) or hardware A "part" refers to a software component, and a "unit" performs a certain role. "Part" does not mean to be limited to software or hardware. The present invention may be configured to include a recording medium capable of being reproduced by 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, program code Segments, drivers, firmware, microcode, circuits, data, databases Includes classes, data structures, tables, arrays, and variables. The functions described may be combined into a smaller number of components and parts or may be added in additional parts. The components and units may be further separated into devices or or one or more CPUs in the security multimedia card. This can be realized as follows.

[0109] The above description has been centered on the embodiment, but this is merely an example and does 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 without departing from the intended characteristics of the product. 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 within the scope of the present invention.

Claims

1. A fault detection device that detects a fault in the display that displays the charging status of the vehicle battery in response to a control signal. In the ejection device, When the control signal meets a preset event, an interrupt signal is generated. an interrupt generation unit for 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. A pressure detection unit, and Whether the display operates, whether the interrupt signal is generated, and The presence or absence of a malfunction of the display and the type of the malfunction are determined based on at least one of the voltage values. and a determination unit that determines at least one of the above.

2. The determination unit is If it is determined that the indicator is active, The display device is controlled in response to the generation or non-generation of the interrupt signal and the voltage value of the control signal.

2. The fault detection device according to claim 1, which judges the presence or absence of a fault and the type of the fault.

3. The determination unit is The interrupt signal is generated when the voltage value of the control signal is greater than a first threshold value. If the range is greater than the first threshold value and less than the second threshold value, the table The indicator is deemed to be operating normally. The interrupt signal is generated when the voltage value of the control signal is greater than the first threshold. If the second threshold is not included in the range, a failure occurs in the indicator.

3. The fault detection device according to claim 2, wherein the fault detection device judges that a fault has occurred.

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

5. The determination unit is If the interrupt signal is not generated, it is determined that a malfunction has occurred in the display.

3. The fault detection device according to claim 2.

6. The determination unit is If the voltage value of the control signal is less than or equal to a third threshold value, the indicator The fault type was determined to be a ground short circuit. If the voltage value of the control signal is greater than a third threshold value, the type of failure of the indicator is determined.

6. The fault detection device according to claim 5, wherein the fault is judged to be a battery short circuit.

7. The determination unit is If it is determined that the indicator is not active, and determining whether or not the display is malfunctioning and the type of malfunction according to a voltage value of the control signal.

2. The fault detection device according to claim 1.

8. The determination unit is If the voltage value of the control signal is less than or equal to a fourth threshold value, the indicator is determined to be in normal condition, If the voltage value of the control signal is greater than a fourth threshold value, the type of failure of the indicator is determined as BAL.

8. The fault detection device according to claim 7, wherein the fault is judged to be a battery short circuit.

9. A fault detection device that detects a fault in the display that displays the charging status of the vehicle battery in response to a control signal. A fault detection method using an output device, comprising: When the control signal meets a preset event, an interrupt signal is generated. and A step of converting the analog value of the control signal into a digital value and detecting the voltage value of the control signal. Tep and, Whether the display operates, whether the interrupt signal is generated, and The presence or absence of a malfunction of the display and the type of the malfunction are determined based on at least one of the voltage values. and determining at least one of the following:

10. determining whether or not the display is malfunctioning and / or the type of malfunction; teeth, determining whether the indicator is in operation; If it is determined that the display is in operation, it is determined that the interrupt signal has occurred. Then, the presence or absence of the generation of the interrupt signal and the voltage value of the control signal are determined. At least one of the presence or absence of a malfunction of the display and the type of the malfunction is determined based on at least one of the following: determining one of the If it is determined that the display is not in operation, the display is turned on or off based on the voltage value of the control signal. determining at least one of the presence or absence of a malfunction of the indicator and the type of the malfunction; The fault detection method according to claim 9,

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