KR102224076B1 - Apparatus for diagnosing reserving charging function of battery and method thereof - Google Patents

Abstract

The present invention relates to an apparatus and method for diagnosing the reserved charge function of a battery, comprising: a real-time controller that operates based on a defined clock signal and generates an interrupt signal at a reserved charge time set by a user for a battery of a vehicle, charging to a battery The charging switch driving unit is connected to the power output terminal for driving the charging switch that regulates the supply of power to drive the charging switch, and the charging switch driving unit is wake-up by an interrupt signal generated by the real-time controller. The battery is scheduled to be charged at the reserved charge time by turning on the charge switch through the first diagnosis, which diagnoses an abnormality of the real-time controller based on a clock signal input from the real-time controller, and an abnormality of the reserved charge time set in the real-time controller. And a controller for performing a second diagnosis to diagnose or a third diagnosis to diagnose an abnormality in the power output terminal based on a feedback signal input from the power output terminal.

Description

Device and method for diagnosing the reserved charge function of the battery {APPARATUS FOR DIAGNOSING RESERVING CHARGING FUNCTION OF BATTERY AND METHOD THEREOF}

The present invention relates to an apparatus and method for diagnosing a reserved charging function of a battery, and more particularly, to an apparatus and method for diagnosing a reserved charging function of a battery for diagnosing a reserved charging function for a battery mounted in a vehicle.

Charging systems such as On-Board Charger (OBC) applied to electric vehicles such as EV (Electric Vehicle) or PHEV (Plug-in Hybrid Electric Vehicle) are based on commercial power. It performs charging for the battery, and also supports a reservation charging function that performs reservation charge of the battery according to the battery reservation schedule set by the user. When the battery reservation schedule is programmed by the user, the charging system of the vehicle automatically wakes up at the reserved charging time on the battery reservation schedule to start charging the battery.

On the other hand, there may be a situation in which the battery is not scheduled to be charged at the reserved charging time set by the user due to a failure of the charging system of the vehicle. In this case, the user does not have any diagnostic information about the error of the charging system. It may be accompanied by an inconvenience that the vehicle cannot be used in a state where it is not provided. In addition, if charging of the battery is started at a time other than the reserved charging time set by the user due to an error in the charging system of the vehicle, an unintended electric charge may be charged. Even though charging of the battery is started, the possibility of personal injury due to electric shock cannot be ruled out if the user or passengers board the vehicle without recognizing the defect in the battery charging function.

The background technology of the present invention is disclosed in Korean Patent Application Publication No. 10-2018-0029713 (published on March 21, 2018).

The present invention was invented to solve the above-described problem, and an object according to an aspect of the present invention is to diagnose an abnormality in the reservation charging function for a battery installed in a vehicle and provide the diagnosis result to the user, thereby allowing the user to Diagnosis of the battery's scheduled charging function, which allows you to check for abnormalities in the reservation charge function and prevents unexpected electric charges and human damage by blocking the scheduled charging operation of the battery in the event of an abnormality in the reservation charging function. It is to provide an apparatus and method.

The apparatus for diagnosing the reservation charging function of a battery according to an aspect of the present invention is a real-time controller that operates based on a defined clock signal to generate an interrupt signal for a vehicle battery at a reserved charging time set by a user, and charging the battery. The charging switch driver is connected to the power output terminal for driving the charging switch that regulates the supply of power to drive the charging switch, and the charging is wake-up by an interrupt signal generated by the real-time controller. The first diagnosis for diagnosing an abnormality of the real-time controller based on a clock signal input from the real-time controller, the real-time, performing a reservation charging of the battery at the reserved charging time by turning on the charging switch through a switch driving unit. And a controller for performing a second diagnosis for diagnosing an abnormality in the reserved charging time set in the controller or a third diagnosis for diagnosing an abnormality in the power output terminal based on a feedback signal input from the power output terminal.

In the present invention, the clock signal has a predefined clock frequency, and the control unit determines whether the clock frequency of the clock signal is out of a preset threshold frequency range when performing the first diagnosis. It characterized in that it diagnoses the abnormality of the real-time controller by using.

In the present invention, when performing the second diagnosis, the control unit uses a method of determining whether a difference between the reserved charging time set in the real-time controller and the reference time information obtained from the outside exceeds a preset threshold value. Thus, it is characterized in that the abnormality of the reserved charging time is diagnosed.

In the present invention, when performing the third diagnosis, the control unit determines whether the analog feedback voltage input from the power output terminal as the feedback signal exceeds a preset threshold voltage. It is characterized by diagnosing abnormalities.

In the present invention, the control unit sequentially performs the first diagnosis, the second diagnosis, and the third diagnosis, but when an abnormality is detected in each diagnosis process, the diagnosis result is stored and a reservation charge operation of the battery is performed. It is characterized in that to stop.

In the present invention, the control unit is configured to perform the first diagnosis, the second diagnosis, and the third diagnosis sequentially, and as a result of sequentially performing the first diagnosis, the second diagnosis, and the third diagnosis, when it is determined that all of the real-time controller, the reservation charging time, and the power output terminal are normal, the charging The charging switch is turned on through a switch driving unit to perform scheduled charging of the battery.

A method for diagnosing the reservation charge function of a battery according to an aspect of the present invention is a real-time controller that operates based on a defined clock signal and generates an interrupt signal at a reserved charge time set by a user for a battery of a vehicle, charging to the battery. The charging switch driver is connected to the power output terminal for driving the charging switch that regulates the supply of power to drive the charging switch, and the charging is wake-up by an interrupt signal generated by the real-time controller. A method for diagnosing a reserved charging function of the battery in a vehicle power system including a control unit for performing reserved charging of the battery at the reserved charging time by turning on the charging switch through a switch driving unit, wherein the control unit comprises: A first diagnosis step of diagnosing an abnormality of the real-time controller based on a clock signal input from the real-time controller, a second diagnosis step of diagnosing an abnormality of the reserved charging time set in the real-time controller, or a feedback signal input from the power output terminal A third diagnosis step of diagnosing an abnormality in the power output terminal is performed based on the diagnosis of a reservation charging function of the battery.

In the present invention, the control unit sequentially performs the first diagnosis step, the second diagnosis step, and the third diagnosis step, but when an abnormality is detected in each of the diagnosis steps, the diagnosis result is stored and the battery It characterized in that the reservation charging operation is stopped.

In the present invention, the first diagnosis step includes determining, by the control unit, whether a source of wake-up corresponds to an interrupt signal generated by the real-time controller, and the source of wake-up is the interrupt signal When it is determined that it corresponds to, determining whether a clock frequency predefined in the clock signal is out of a preset threshold frequency range, and when it is determined that the clock frequency is out of the threshold frequency range, a first error Increasing the count, and when the first error count reaches a preset first threshold count, the real-time controller diagnoses an abnormality, stores the diagnosis result, and stops the reservation charging operation of the battery. It is characterized.

In the present invention, the control unit performs the second diagnosis step when it is determined that the clock frequency does not exceed the threshold frequency range, and in the second diagnosis step, the control unit includes a reservation charge set in the real-time controller. Determining whether a difference between time and reference time information obtained from the outside exceeds a preset threshold, increasing a second error count when it is determined that the difference exceeds the threshold, and the second 2 When the error count reaches a preset second threshold count, diagnosing that the reserved charging time is abnormal, storing the diagnosis result, and stopping the reservation charging operation of the battery.

In the present invention, the control unit performs the third diagnosis step when it is determined that the difference is equal to or less than the threshold value, and the third diagnosis step includes the control unit, an analog input from the power output terminal as the feedback signal. Determining whether a feedback voltage exceeds a preset threshold voltage, increasing a third error count when it is determined that the analog feedback voltage exceeds the threshold voltage, and the third error count 3, when the threshold count is reached, diagnosing that the power output terminal is abnormal, storing the diagnosis result, and stopping the reservation charging operation of the battery.

In the present invention, when it is determined that the analog feedback voltage is less than or equal to the threshold voltage, the control unit further comprises the step of performing a scheduled charging of the battery by turning on the charging switch through the charging switch driving unit. .

According to one aspect of the present invention, the present invention is a superimposed method for diagnosing an abnormality in a real-time controller, an abnormality in a reserved charging time when the charging system wakes up, and an abnormality in a power stage output for driving a charging switch. Through the diagnosis process, an abnormality in the reservation charging function of the battery can be more accurately diagnosed, and the diagnosis result is provided to the user to confirm, so that the user can take appropriate follow-up measures.

In addition, according to the present invention, when an abnormality in the reservation charging function occurs, the charging switch of the vehicle is safely turned off to block the reservation charging operation of the battery, thereby preventing unexpected electric charges and personal injury.

1 is a block diagram illustrating an apparatus for diagnosing a reservation charge function of a battery according to an embodiment of the present invention.
2 is a block diagram illustrating a detailed configuration of an apparatus for diagnosing a reservation charge function of a battery according to an embodiment of the present invention.
3 to 5 are flowcharts illustrating a method of diagnosing a reservation charging function of a battery according to an exemplary embodiment of the present invention.

Hereinafter, embodiments of an apparatus and method for diagnosing a reservation charge function of a battery according to the present invention will be described with reference to the accompanying drawings. In this process, the thickness of the lines or the size of components shown in the drawings may be exaggerated for clarity and convenience of description. In addition, terms to be described later are terms defined in consideration of functions in the present invention, which may vary according to the intention or custom of users or operators. Therefore, definitions of these terms should be made based on the contents throughout the present specification.

1 is a block diagram illustrating an apparatus for diagnosing a reservation charge function of a battery according to an embodiment of the present invention, and FIG. 2 is a detailed configuration diagram of an apparatus for diagnosing a reservation charge function of a battery according to an embodiment of the present invention. It is a block diagram shown as.

1 and 2, the apparatus for diagnosing a reservation charging function of a battery according to an embodiment of the present invention includes a first power supply unit 100, a second power supply unit 200, a control unit 300, and a real-time controller 400. ), a charging switch driving unit 500 and a reference time information providing unit 600, each of the components 100-600 is a vehicle controller (VCU: Vehicle Control Unit) can be configured. As illustrated in FIG. 2, the vehicle controller (VCU) may include a control unit 300 (Micro Controller Unit) and a real time controller 400 (RTC) as a control unit. The control unit 300 and the real-time controller 400 may operate by receiving operating power from the first power supply unit 100 and the second power supply unit 200 respectively connected to each other.

The real-time controller 400 is configured to communicate with the controller 300 through a Serial Peripheral Interface (SPI) bus. In this embodiment, the real-time controller 400 operates based on a defined clock signal to generate an interrupt signal for the vehicle battery at a reserved charging time set by the user, and the generated interrupt signal is the real-time controller 400 It is input to the en2 terminal of the first power supply unit 100 from the INT terminal of, and accordingly, operation power is supplied to the control unit 300 so that the control unit 300 may wake-up. In addition, the clock signal of the real-time controller 400 has a predefined clock frequency (eg, 1 Hz), and is input from the clk_out terminal of the real-time controller 400 to the clk_in terminal of the controller 300. As will be described later, the controller 300 may diagnose an abnormality in the real-time controller 400 based on a clock signal input from the real-time controller 400.

The charging switch driving unit 500 may function as a driver for driving the charging switch SW_CHARGE by being connected to a power output terminal for driving the charging switch SW_CHARGE that regulates the supply of charging power to the battery. Here, the charging switch (SW_CHARGE) is a relay connected between the battery and the on-board charger (OBC) of the vehicle to regulate the supply of charging power to the battery through the on-board charger (OBC). ) Can be implemented.

In this embodiment, the charging switch driver 500 includes a high side switch 510 (High Side Switch) provided on the battery side as shown in FIG. 2, and a low side switch 520 (LSS) provided on the ground side. Low Side Switch). When the power output terminal to which the charging switch driver 500 is connected is divided into first and second power output terminals, the high-side switch 510 is connected between the battery and the first power output terminal, and the low-side switch 520 is a second power output terminal. It may be connected between the power output terminal and the ground GND. In the normal charging operation state of the battery, the high-side switch 510 and the low-side switch 520 are turned on by the control of the control unit 300, and accordingly, the relay coil of the charging switch SW_CHARGE is excited and the charging switch SW_CHARGE ) Is turned on so that the battery can be charged.

The reference time information providing unit 600 transmits reference time information used to diagnose an abnormality in the reserved charging time set in the real-time controller 400 in a second diagnosis process to be described later through a controller area network (CAN) communication. ) Can be provided. The reference time information providing unit 600 may be implemented as an audio unit applied to a vehicle to provide real-time information as the reference time information to the control unit 300. Further, the reference time information providing unit 600 may be implemented as a multimedia device such as an AVN (Audio, Video, Navigation) system mounted on a vehicle, and accordingly, a UI (User Interface).

The control unit 300 wakes up by receiving operating power from the first power supply unit 100 enabled through the en1 terminal as the ignition key is turned on in a normal state in which the reservation charging operation of the battery is not performed. It is up and can operate. In addition, when the user sets the battery reservation schedule, the controller 300 wakes up by an interrupt signal generated by the real-time controller 400 at the reserved charging time, and the charging switch (SW_CHARGE) through the charging switch driver 500 ) By turning on, it is possible to operate to perform the reservation charging of the battery at the reserved charging time.

However, if a preliminary diagnosis of the abnormality of the reserved charging function is not pre-selected before starting the reservation charging of the battery, as mentioned above, the user is inconvenient that no diagnostic information about the abnormality of the reserved charging function is provided. This is accompanied, and unexpected electric charges and personal damage may occur. In this embodiment, first to third diagnosis procedures are employed to diagnose an abnormality in the reservation charging function, which will be described in detail below.

The control unit 300 includes a first diagnosis for diagnosing an abnormality in the real-time controller 400 based on a clock signal output from the real-time controller 400, and a second diagnosis for diagnosing an abnormality in the reserved charging time set in the real-time controller 400. Alternatively, a third diagnosis for diagnosing an abnormality in the power output terminal may be performed based on a feedback signal input from the power stage output. When an abnormality is not detected in the corresponding diagnosis process, the control unit 300 may sequentially perform the first to third diagnosis through a method of performing the next diagnosis process. When an abnormality is detected in each diagnosis process, the corresponding It is possible to save the diagnosis result of the diagnosis process and stop the scheduled charging operation of the battery.

The first diagnosis is a process for diagnosing whether the real-time controller 400 operates normally. When the controller 300 performs the first diagnosis, the clock frequency of the clock signal of the real-time controller is out of a preset threshold frequency range. It is possible to diagnose an abnormality of the real-time controller 400 by using a method of determining whether or not.

That is, the real-time controller 400 may generate a clock signal having a predefined clock frequency (eg, 1 Hz) based on a plurality of timer modules applied therein, and operate based on the generated clock signal to provide a user with a It can operate to generate an interrupt signal at the reserved charge time set by this. The controller 300 may determine whether the timer of the real-time controller 400 is abnormal using the clock frequency of the real-time controller 400, and when the clock frequency is out of the threshold frequency range (for example, the clock frequency is preset). If the threshold frequency is exceeded), the timer of the real-time controller 400 may be diagnosed as abnormal. In this case, in order to secure the reliability of abnormality diagnosis of the real-time controller 400, when the number of times the clock frequency exceeds the threshold frequency range reaches the set number, it may be diagnosed as an abnormality of the real-time controller 400, and the configuration is When the first error count, which increases each time the frequency deviates from the threshold frequency, reaches a preset first threshold count, the real-time controller 400 may diagnose an abnormality. Meanwhile, the threshold frequency may be a frequency of a clock signal generated based on a timer module inside the control unit 300 for the operation of the control unit 300, and thus the threshold frequency generated by the control unit 300 is a real-time controller ( Since the clock frequency of the 400) is different from the clock source, it is compared with the clock frequency of the real-time controller 400 to be used as a reference frequency capable of diagnosing an abnormality in the real-time controller 400.

If the real-time controller 400 is diagnosed as abnormal through the first diagnosis, the controller 300 may store the diagnosis result in a memory (eg, EEPROM, etc.) and stop the scheduled charging operation of the battery. An alarm can be generated through an LED mounted on the device or a Malfunction Indication Lamp (MIL) so that the user can check for abnormalities in the reserved charging function. In addition, the power of the vehicle controller VCU may be turned off in order to safely turn off the charging switch SW_CHARGE (that is, the power of the vehicle controller VCU may be turned off, thereby disabling the reserved charging operation of the battery).

If, in the first diagnosis process, it is determined that the clock frequency does not exceed the threshold frequency, the controller 300 diagnoses that the real-time controller is normal and performs the next second diagnosis.

The second diagnosis is a process for diagnosing an abnormality in the reserved charging time set in the real-time controller 400, that is, a process for diagnosing whether the controller 300 normally wakes up at the reserved charging time set by the user, Through the second diagnosis, a situation in which the reserved charging is started at a time other than the reserved charging time set by the user may be prevented.

When performing the second diagnosis, the controller 300 makes a reservation using a method of determining whether the difference between the reserved charging time set in the real-time controller 400 and the reference time information obtained from the outside exceeds a preset threshold. It is possible to diagnose an abnormality in the charging time. As described above, the reference time information may be obtained by being transmitted from the reference time information providing unit 600, which may be implemented as an audio unit, and accordingly, the control unit 300 reserves the reservation set in the real-time controller 400. If the difference between the charging time and the reference time information obtained from the reference time information providing unit 600 exceeds a preset threshold, it may be diagnosed that the reserved charging time set in the real-time controller 400 is abnormal (that is, the control unit 300 ) Can be diagnosed as abnormal wake-up time). In this case, in order to secure the reliability of diagnosis of abnormality in the reservation charging time, when the number of times the difference exceeds the threshold value reaches the set number, it may be diagnosed as an abnormality in the reservation charging time. When the second error count, which increases each time it exceeds, reaches a preset second threshold count, it may be implemented as an embodiment of diagnosing that the reserved charging time is abnormal.

When it is diagnosed that the reservation charging time set in the real-time controller 400 is abnormal through the second diagnosis, the controller 300 stores the diagnosis result in a memory (eg, EEPROM, etc.) and stops the reservation charging operation of the battery. In addition, an alarm can be generated through an LED mounted on the vehicle's cluster or a Malfunction Indication Lamp (MIL), allowing the user to check for abnormalities in the reserved charging function. In addition, the power of the vehicle controller VCU may be turned off in order to safely turn off the charging switch SW_CHARGE (that is, the power of the vehicle controller VCU may be turned off, thereby disabling the reserved charging operation of the battery).

If, in the second diagnosis process, it is determined that the difference between the reserved charging time and the reference time information is less than or equal to the threshold value, the control unit 300 diagnoses that the reserved charging time set in the real-time controller 400 is normal and performs the next third diagnosis. do.

The third diagnosis is a process for diagnosing an abnormality in the power stage output described above. When performing the third diagnosis, the controller 300 sets an analog feedback voltage input from the power output terminal in advance. An abnormality in the power output terminal can be diagnosed using a method of determining whether or not the threshold voltage is exceeded.

As described above, the high side switch 510 of the charging switch driver 500 is connected between the battery and the first power output terminal, and the low side switch 520 may be connected between the second power output terminal and the ground (GND). Accordingly, the first analog feedback voltage input from the first power output terminal exceeds a preset first threshold voltage, or the second analog feedback voltage input from the second power output terminal exceeds a preset second threshold voltage. If determined, the controller 300 may diagnose an abnormality in the power output terminal (eg, short circuit to battery (SCB) or short circuit to ground (SCG)). The first and second analog feedback voltages may be preset in consideration of voltages detected at the first and second power output terminals when a battery short or a ground short does not occur. In this case, in order to secure the reliability of diagnosis of an abnormality in the power output stage, when the number of times the analog feedback voltage exceeds the threshold voltage reaches the set number, it may be diagnosed as an abnormality in the power output stage. A third error count that increases each time (i.e., whenever the first analog feedback voltage exceeds the first threshold voltage or the second analog feedback voltage exceeds the second threshold voltage) is set to a third threshold. When the count is reached, the power output stage may be diagnosed as abnormal.

When it is diagnosed that the power output terminal is abnormal through the third diagnosis, the control unit 300 may store the diagnosis result in a memory (eg, EEPROM, etc.) and stop the scheduled charging operation of the battery. An alarm can be generated through an LED or MIL (Malfunction Indication Lamp) to allow the user to check for abnormalities in the reserved charging function. In addition, the power of the vehicle controller VCU may be turned off in order to safely turn off the charging switch SW_CHARGE (that is, the power of the vehicle controller VCU may be turned off, thereby disabling the reserved charging operation of the battery).

If, in the third diagnosis process, it is determined that the analog feedback voltage is less than the threshold voltage (that is, if it is determined that the first and second analog feedback voltages are less than the first and second threshold voltages, respectively), the control unit 300 It can be diagnosed as normal, and in this case, the real-time controller 400, the reserved charging time, and the power output stage are all determined to be normal through the first to third diagnosis processes, so the controller 300 controls the charging switch driver 500. Through this, the charging switch SW_CHARGE may be turned on to perform the scheduled charging of the battery.

In the above-described embodiment, the control unit 300 diagnoses an abnormality of the real-time controller 400 based on a clock signal input from the real-time controller 400, a first diagnosis step (S100), which is set in the real-time controller 400. A second diagnostic step (S200) of diagnosing an abnormality in the reserved charging time or a third diagnostic step (S300) of diagnosing an abnormality in the power output terminal based on a feedback signal input from the power output terminal is performed to perform the reserved charging function of the battery. It may be implemented as a diagnostic method for diagnosing a battery reservation charge function.

Hereinafter, a method for diagnosing the reservation charging function of a battery according to an embodiment of the present invention will be described with reference to FIGS. 3 to 5, and a description overlapping with the above is omitted, and the battery of this embodiment is focused on the time series configuration. Describes the method of diagnosing the reserved charge function of

Referring to FIG. 3, the first diagnosis step (S100) will be described, first, the control unit 300 determines whether the source of the wake-up corresponds to an interrupt signal generated by the real-time controller 400 (S110). . In step S110, the controller 300 may determine whether the current wake-up source corresponds to an interrupt signal through an interrupt signal input through the fb_en2 terminal. If the ignition key signal is input through the fb_en1 terminal, the control unit 300 determines that the battery has been wake-up in a normal state in which the reservation charging operation is not performed, and performs a normal control operation.

When it is determined in step S110 that the wake-up source corresponds to the interrupt signal, the controller 300 determines whether a clock frequency predefined in the clock signal of the real-time controller 400 is out of a preset threshold frequency range. (S120). In step S120, the controller 300 may determine whether the clock frequency exceeds a preset threshold frequency as illustrated in FIG. 3.

When it is determined in step S120 that the clock frequency is out of the threshold frequency range (that is, when it is determined that the clock frequency exceeds the preset threshold frequency), the controller 300 increases the first error count by 1 (S130 ) (Initial value of the first error count = 0). In step S130, the controller 300 may output a real-time controller reset signal RST_RTC as shown in FIG. 3.

As a result of the repetitive execution of steps S110 to S130, when the first error count reaches a preset first threshold count (S140), the controller 300 diagnoses the real-time controller 400 as abnormal and stores the diagnosis result. (S150) The reservation charging operation of the battery is stopped, and the power of the vehicle controller VCU is turned off to safely turn off the charging switch SW_CHARGE (S160).

Meanwhile, when it is determined in step S120 that the clock frequency does not exceed the threshold frequency, the next second diagnosis step (S200) is performed.

When the second diagnosis step (S200) is described with reference to FIG. 4, first, the controller 300 determines whether the difference between the reserved charging time set in the real-time controller 400 and the reference time information obtained from the outside exceeds a preset threshold. Whether or not it is determined (S210). As described above, the reference time information may be obtained by being transmitted from the reference time information providing unit 600 that may be implemented as an audio unit.

If it is determined that the difference in step S210 exceeds the threshold value, the control unit 300 increases the second error count by 1 (S220) (initial value of the second error count = 0).

As a result of the repetitive execution of steps S210 and S220, when the second error count reaches a preset second threshold count (S230), the controller 300 diagnoses that the reserved charging time is abnormal and stores the diagnosis result (S240). ) The reservation charging operation of the battery is stopped, and the power of the vehicle controller VCU is turned off to safely turn off the charging switch SW_CHARGE (S250).

Meanwhile, when it is determined that the difference in step S210 is less than or equal to the threshold value, the next third diagnosis step S300 is performed.

Referring to FIG. 5, the third diagnosis step (S300) will be described, first, the controller 300 determines whether the analog feedback voltage input from the power output terminal exceeds a preset threshold voltage (S310). In step S310, the controller 300 determines whether the first analog feedback voltage input from the first power output terminal exceeds a preset first threshold voltage, and the second analog feedback voltage input from the second power output terminal is preset. 2 Determine whether or not the threshold voltage is exceeded.

When it is determined that the analog feedback voltage exceeds the threshold voltage in step S310 (that is, when it is determined that the first analog feedback voltage exceeds the first threshold voltage or the second analog feedback voltage exceeds the second threshold voltage) ), the control unit 300 increases the third error count by 1 (S320) (initial value of the third error count = 0).

As a result of repetitive execution of steps S310 and S320, when the third error count reaches a preset third threshold count (S330), the controller 300 diagnoses that the power output terminal is abnormal and stores the diagnosis result (S340). The reserved charging operation of the battery is stopped, and the power of the vehicle controller VCU is turned off to safely turn off the charging switch SW_CHARGE (S350).

Meanwhile, when it is determined that the analog feedback voltage is less than or equal to the threshold voltage in step S310 (that is, when it is determined that the first analog feedback voltage is less than or equal to the first threshold voltage and the second analog feedback voltage is less than or equal to the second threshold voltage), the controller In operation 300, the charging switch SW_CHARGE is turned on through the charging switch driving unit 500 to perform reservation charging of the battery (S400).

As described above, the present embodiment provides an overlapping diagnosis process for diagnosing an abnormality in a real-time controller, an abnormality in the reserved charging time when the charging system wakes up, and an abnormality in the power output terminal for driving the charging switch. The abnormality can be diagnosed more accurately, and the diagnosis result can be provided to the user to confirm, thereby allowing the user to take appropriate follow-up measures. In addition, according to the present embodiment, when an abnormality in the reservation charging function occurs, the charging switch of the vehicle is safely turned off to block the reservation charging operation of the battery, thereby preventing unexpected electric charges and personal injury.

The implementation described herein may be implemented in, for example, a method or process, an apparatus, a software program, a data stream or a signal. Although discussed only in the context of a single form of implementation (eg, only as a method), the implementation of the discussed features may also be implemented in other forms (eg, an apparatus or program). The device may be implemented with appropriate hardware, software and firmware. The method may be implemented in an apparatus such as a processor, which generally refers to a processing device including, for example, a computer, a microprocessor, an integrated circuit or a programmable logic device, or the like. Processors also include communication devices such as computers, cell phones, personal digital assistants ("PDAs") and other devices that facilitate communication of information between end-users.

As described above, the present invention has been described with reference to the embodiments shown in the drawings, but this is only an example, and various modifications and other equivalent embodiments are possible from those of ordinary skill in the field to which the technology pertains. I will understand the point. Therefore, the technical protection scope of the present invention should be determined by the following claims.

100: first power supply
200: second power supply
300: control unit
400: real-time controller
500: charging switch driving unit
510, 520: high side switch, low side switch
600: reference time information providing unit
SW_CHARGE: charging switch
OBC: On-board charger

Claims (12)

A real-time controller that operates based on a defined clock signal and generates an interrupt signal for a battery of the vehicle at a reserved charging time set by a user;
A charging switch driving unit connected to a power output terminal for driving a charging switch that regulates supply of charging power to the battery to drive the charging switch; And
A wake-up is performed by an interrupt signal generated by the real-time controller, and the charging switch is turned on through the charging switch driving unit, thereby performing reserved charging of the battery at the reserved charging time, and the real-time controller A first diagnosis for diagnosing an abnormality of the real-time controller based on a clock signal input from the, a second diagnosis for diagnosing an abnormality in the reserved charging time set in the real-time controller, or the feedback signal input from the power output terminal. A control unit for performing a third diagnosis for diagnosing an abnormality in the power output terminal;
Including,
Wherein the control unit sequentially performs the first diagnosis, the second diagnosis, and the third diagnosis.
The method of claim 1,
The clock signal has a predefined clock frequency,
When performing the first diagnosis, the controller diagnoses an abnormality of the real-time controller by using a method of determining whether a clock frequency of the clock signal is out of a preset threshold frequency range. Scheduled charging function diagnostic device.
The method of claim 1,
When performing the second diagnosis, the control unit uses a method of determining whether a difference between the reserved charging time set in the real-time controller and the reference time information obtained from the outside exceeds a preset threshold value. An apparatus for diagnosing a reservation charge function of a battery, characterized in that diagnosing an abnormality in time.
The method of claim 1,
When performing the third diagnosis, the controller diagnoses an abnormality in the power output terminal using a method of determining whether an analog feedback voltage input from the power output terminal as the feedback signal exceeds a preset threshold voltage. An apparatus for diagnosing a reservation charge function of a battery, characterized in that.
The method of claim 1,
The control unit, when an abnormality is detected in each diagnosis process, stores the diagnosis result and stops a reservation charging operation of the battery.
The method of claim 5,
When it is determined that the real-time controller, the reservation charging time, and the power output terminal are all normal as a result of sequentially performing the first diagnosis, the second diagnosis, and the third diagnosis, the control unit uses the charging switch driving unit. The battery reservation charge function diagnosis apparatus, characterized in that the reservation charge of the battery is performed by turning on the charge switch.
A real-time controller that operates based on a defined clock signal and generates an interrupt signal for a battery of the vehicle at a reserved charging time set by a user; A charging switch driving unit connected to a power output terminal for driving a charging switch that regulates supply of charging power to the battery to drive the charging switch; And a control unit that wakes up by an interrupt signal generated by the real-time controller and turns on the charging switch through the charging switch driving unit, thereby performing reserved charging of the battery at the reserved charging time. A method for diagnosing a reservation charging function of the battery in a vehicle power system including,
A first diagnosis step of diagnosing an abnormality of the real-time controller based on a clock signal input from the real-time controller, a second diagnosis step of diagnosing an abnormality in a reserved charge time set in the real-time controller, or from the power output terminal. A method of diagnosing a reservation charging function of a battery, characterized in that the reservation charging function of the battery is diagnosed by performing a third diagnosis step of diagnosing an abnormality in the power output terminal based on an input feedback signal.
The method of claim 7,
The control unit sequentially performs the first diagnosis step, the second diagnosis step, and the third diagnosis step, and stores the diagnosis result when an abnormality is detected in each diagnosis step, and performs a reservation charging operation of the battery. A method for diagnosing a scheduled charging function of a battery, characterized in that stopping.
The method of claim 7,
In the first diagnosis step, the control unit,
Determining whether a source of wake-up corresponds to an interrupt signal generated by the real-time controller;
When it is determined that the source of the wake-up corresponds to the interrupt signal, determining whether a clock frequency predefined in the clock signal is out of a preset threshold frequency range;
If it is determined that the clock frequency is out of the threshold frequency range, increasing a first error count; And
Diagnosing that the real-time controller is abnormal when the first error count reaches a preset first threshold count, storing the diagnosis result, and stopping a reservation charging operation of the battery;
A method for diagnosing a reservation charging function of a battery, comprising: a.
The method of claim 9,
When it is determined that the clock frequency does not exceed the threshold frequency range, the control unit performs the second diagnosis step,
In the second diagnosis step, the control unit,
Determining whether a difference between the reserved charging time set in the real-time controller and reference time information obtained from the outside exceeds a preset threshold value;
Increasing a second error count when it is determined that the difference exceeds the threshold value; And
Diagnosing that the reserved charging time is abnormal when the second error count reaches a preset second threshold count, storing the diagnosis result, and stopping the reservation charging operation of the battery;
A method for diagnosing a reservation charging function of a battery, comprising: a.
The method of claim 10,
The control unit performs the third diagnosis step when it is determined that the difference is less than or equal to the threshold value,
In the third diagnosis step, the control unit,
Determining whether an analog feedback voltage input from the power output terminal as the feedback signal exceeds a preset threshold voltage;
Increasing a third error count when it is determined that the analog feedback voltage exceeds the threshold voltage; And
Diagnosing that the power output terminal is abnormal when the third error count reaches a preset third threshold count, storing the diagnosis result, and stopping a reservation charging operation of the battery;
A method for diagnosing a reservation charging function of a battery, comprising: a.
The method of claim 11,
When it is determined that the analog feedback voltage is less than or equal to the threshold voltage, the control unit turns on the charge switch through the charge switch driving unit to perform a reservation charge of the battery; How to diagnose the reservation charge function.

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