KR20180045092A - System for processing fault information of vehicle - Google Patents

Abstract

A system for processing fault information of a vehicle according to the present invention comprises: a blocking device for electrically connecting or blocking power supplied from a battery to an electronic field; and a controller including a detecting portion for detecting an on/off state of the blocking device, a storage portion for storing battery state data and vehicle information data when the detecting portion detects an off state of the blocking device, and a showing portion for outputting a fault code or fault information on a display device based on data stored in the storage portion.

Description

[0001] SYSTEM FOR PROCESSING FAULT INFORMATION OF VEHICLE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixed information processing system for a vehicle, and more particularly, to a fixed information processing system for a vehicle, which, when a lithium battery is used as a low voltage battery used in a vehicle, stores vehicle data, And more particularly, to a fault information processing system for a vehicle that enables a fault diagnosis to be smoothly performed.

An electric vehicle or a fuel cell vehicle that is an environmentally friendly vehicle has a low voltage battery (also referred to as a 'secondary battery') to provide power for starting the vehicle and to provide power to electric loads operating at a low voltage. Also, a general internal combustion engine vehicle that drives an engine using fossil fuel is provided with a battery that can be charged to start the vehicle or provide power to electric loads.

These batteries are mainly used for low-cost lead-acid batteries, but they are expected to replace lithium batteries with longer life and better electrical characteristics.

Since the lithium battery is required to shut off a complete discharge due to its characteristics, when the state of charge of the auxiliary battery becomes lower than a predetermined threshold voltage (lower limit of discharge), the relay is used to shut off the electrical connection with the vehicle system. In order to restart the vehicle in the state that the electrical connection is blocked by the relay, the relay is manually turned on to re-establish the electrical connection. In the past, a reconnection switch applied to apply the battery voltage directly to the coil of the relay was used. That is, conventionally, when the user presses the reconnection switch from the outside, the battery voltage is applied to the coil for driving the relay, and the relay is turned on so that the battery is electrically connected to the vehicle system.

Such a conventional battery relay reconnection method has various problems. For example, when the reconnection switch is kept on for a certain period of time due to erroneous operation of the reconnection switch, the relay coil is continuously applied with the battery voltage, thereby causing the relay coil to be burned. Also, when the battery is in an in-line operation, the battery relay is maintained in a normally-on state for a long time, thereby causing a problem that the battery is over-discharged. Further, when an external power source is connected to the vehicle side terminal of the relay for the jump start, when the external power source has a voltage higher than a certain level, there is a problem that the battery is overcharged or overvoltage is applied and the battery is rapidly deteriorated.

Furthermore, since there is no data left when the relay is shut off, there is a problem that it is impossible to determine whether the relay is shut down due to carelessness of the driver, the problem of the vehicle, or the problem of the battery.

It should be understood that the foregoing description of the background art is merely for the purpose of promoting an understanding of the background of the present invention and is not to be construed as an admission that the prior art is known to those skilled in the art.

JP 2014-187731 A JP 2008-309041 A

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve such problems. In the case of using a lithium battery as a low-voltage battery used in a vehicle, when a relay between a lithium battery and an electric load is turned off, So that the mechanic can accurately recognize the failure state of the vehicle.

According to an aspect of the present invention, there is provided a failure information processing system for a vehicle, comprising: a blocking device for electrically connecting or disconnecting a power source supplied from a battery to an electric load; And a storage unit for storing battery state data and vehicle information data when the sensing unit senses an OFF state of the interception device, And a controller configured to output a failure code or failure information to the display device based on the data stored in the storage unit.

And a voltage sensor connected to a rear end of the blocking device for detecting a voltage, wherein the sensing unit detects the blocking device in an OFF state when the voltage detected by the voltage sensor is less than a preset threshold value .

And a current sensor connected to a rear end of the blocking device to detect a current, and the sensing unit detects the blocking device in an OFF state when the current value detected from the current sensor is 0A can do.

And a relay controller for controlling on / off of the interrupting device, wherein the sensing unit is configured to turn off the interrupting device when receiving an interrupting device off control signal from the relay control unit, And a detection unit for detecting a state of the battery.

The storage unit may be a nonvolatile memory device.

The battery state data may include at least one of a current, a voltage, and a battery SOC, and the vehicle information data may include at least one of a starting state of the vehicle, a driving distance, and wake-up mode data .

According to the fault information processing system of the vehicle constructed as described above, when the relay between the low-voltage battery and the electric-field load is shut off, the vehicle information is stored and displayed so that the driver or the mechanic can understand the cause of the fault Can be easily grasped.

1 is a block diagram showing a system for processing a fault information of a vehicle according to an embodiment of the present invention;
2 is a flowchart illustrating an operation of a fault information processing system of a vehicle according to an embodiment of the present invention.

Hereinafter, a fault information processing system for a vehicle according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

1 is a block diagram showing a system for processing a fault information of a vehicle according to an embodiment of the present invention. Referring to FIG. 1, a fault information processing system for a vehicle according to an embodiment of the present invention includes a battery 10, a rear end connected electrically to the front end in response to a front end and a control signal connected to the battery 10, A reconnection switch 30 having one end connected to the battery 10 and the other end electrically connected to or disconnected from the one end according to an external input; B +), and is woken up according to the electrical state of the other end of the key input or reconnection switch 30 of the vehicle, and outputs a control signal for controlling the connection state of the interrupting device 20 Hereinafter referred to as BMS, 90).

Here, the shielding device 20 may be a relay, but may also be applied as a switch device for controlling the electric power supply.

The battery 10 is an element that stores electrical energy for outputting power at a low voltage (e.g., about 12 V). The battery 10 can provide the power supply required at start-up of the vehicle and, in some cases, can be used to provide the necessary power supply for the low-voltage load during vehicle operation.

In various embodiments of the present invention, the battery 10 may be termed a low voltage battery or a secondary battery to distinguish it from a high voltage battery for motor drive when applied to an environmentally friendly vehicle that drives the motor with high voltage power, In a vehicle, it can simply be called a battery.

As the battery 10, a lead-acid battery or a lithium battery may be applied. Although relatively low cost lead acid batteries have been applied to date, lithium batteries having high reliability and long life span replace lead acid batteries. Particularly, in the case of a lithium battery, when the battery is discharged below a predetermined voltage, its performance deteriorates drastically. Therefore, a cut-off device 20 is required to cut off the connection with the vehicle system when the voltage decreases below a predetermined voltage level . Although various embodiments of the present invention are more likely to be applied to a vehicle in which a lithium battery is used as the battery 10, the battery 10 is not necessarily limited to a lithium battery, and in the case where a lead acid battery is used as the battery 10 Of course.

The interrupting device 20 is an element that establishes or blocks the electrical connection between the battery 10 (particularly, the lithium battery) and the vehicle system. The cut-off device 20 has a front end electrically connected to the battery 10 and a rear end connected to the system side of the vehicle. The cut-off device 20 electrically connects and disconnects the front end and the rear end, The electrical connection state can be determined.

The shutoff device 20 is determined on / off by a control signal input from the outside. For example, when a control signal having a specific voltage is applied to a coil in the interrupter 20 so as to be in an on state, the front end and the rear end of the interrupter 20 are electrically connected to each other, When the control signal having a specific voltage is applied to the coils in the circuit breaker 20, the front end and the rear end of the circuit breaker 20 are electrically disconnected. To this end, the interrupting device 20 may have two control signal input terminals for receiving a control signal for turning on and a control signal for turning off, respectively.

For example, when the battery 10 is operated under conditions that allow it to perform a normal operation (for example, when the voltage of the battery 10 has a value between a predetermined upper limit voltage and a lower limit voltage) When the battery 10 is controlled to maintain a connected state, that is, an on state, and the battery 10 becomes a voltage equal to or lower than a predetermined threshold value (lower limit voltage), the cutoff device 20 is in a cutoff state, ) State. As such, a control signal for determining the ON / OFF state of the shutdown device 20 is provided at the BMS 90. [

The reconnection switch 30 is an element for receiving input from the outside in order to reconnect (turn on) the relay 10 while the interrupter 20 is off. The reconnection switch 30 may have both ends electrically connected or disconnected according to an externally supplied input. One end of the reconnection switch 30 may be connected to the battery 10 and the other end may be connected to the BMS 90. When the reconnection switch 30 is turned on by an external input, the BMS 90 connected to the other end of the reconnection switch 30 recognizes it and blocks the control signal for turning on the interception device 20 To the device (20).

The BMS 90 is directly connected to the battery 10 to receive a constant power source B +, and can set a time period on its own to perform a wake up operation according to the time period. Further, the BMS 90 may perform a wakeup operation in accordance with the key input (ACC, IG1) of the vehicle or the electrical state of the other end of the reconnection switch 30.

The BMS 90 controls the connection state of the cut-off device 20 according to the voltage of the battery 10 when the BMS 90 is in a state to perform a normal operation. That is, the BMS 90 monitors the voltage of the battery 10, and when the voltage of the battery 10 is lower than a predetermined threshold value, the BMS 90 sends a control signal for turning off the shutoff device 20 to the shutdown device 20 To turn off the shutoff device 20. Since the BMS 90 is directly supplied with the battery voltage as a constant power source, its size can be constantly monitored.

In more detail, the BMS 90 may include a constant power input unit, a relay control unit, a wake-up input unit, and a real time clock (RTC).

The constant power input unit is an element that is directly connected to the battery 10 and is always supplied with the power (B +) from the battery 10. In addition, the always-on power input may provide power to all components of the BMS 90 when the BMS 90 is woken up. In the embodiment of the present invention, since the power is always supplied directly from the battery 10, wake-up is possible even when the cut-off device 20 is turned off.

The relay control unit provides a control signal to the shutdown device 20 to control the electrical connection state of the shutdown device 20. [ As described above, when the battery voltage detected by the voltage sensor 50 becomes less than or equal to a predetermined threshold value, the relay control section can provide a control signal to the shutdown device 20 to turn off the shutdown device 20 . In addition, when the reconnection switch 30 is turned on to receive the battery voltage, the relay control unit can provide a control signal for turning on the interrupting device 20 to the interrupting device 20. [

In particular, the relay control section provides a pulse waveform as a control signal for controlling the interrupting device 20. That is, the relay control unit controls the relay on / off by controlling the pulse waveform. Accordingly, even when the reconnection switch 30 is turned on for a long time, the inner coil of the reconnection switch 30 can be prevented from being damaged.

The wakeup input unit is an element for receiving a signal for waking up the BMS 90. When an input for wake-up is generated in the wake-up input unit, the BMS 90 supplies power to each element constituting the wake-up input unit to start normal operation. That is, the BMS 90 enters a sleep state in which only a minimum operation can be performed in a state in which the vehicle is turned off. In this sleep state, power is not supplied to the relay control unit, so that the BMS 90 can not perform the operation of turning on / off the cut-off device 20. When the wake-up input unit is provided with an input for wake-up, the BMS 90 provides power to the respective elements to start operation, and the relay controller can also receive power and perform operations.

The wake-up signal input to the wake-up input unit may be a key input of the vehicle or an input from the reconnection switch. For example, the accessory ACC may be on or the wakeup input may be provided to key input of the ignition IG1 on to wake up the BMS 90. In addition, the wake-up input unit may operate based on a wake-up signal input from a real time clock unit (RTC unit: real time clock unit), which will be described later, at a predetermined time period.

A real time clock unit (RTC portion) may set the time period during which the BMS 90 is woken up and provide a wake up signal accordingly to cause the BMS 90 to wake up. In one embodiment of the present invention, the real-time clock unit can change the generation period of the wake-up signal according to the surrounding situation.

For example, since various embodiments of the present invention operate at a constant power supply directly from the battery 10, if the constant current is continuously used, the power consumption of the battery 10 is increased. To prevent this, the BMS 90 controls the blocking device 20 to be turned off, and then the real-time clock section increases the wake-up signal generation period to a value greater than that set when the interrupting device 20 is on, , Or by not setting the signal generation period itself (or by setting it to infinity) to prevent periodic wakeup. Thereby, after the battery 10 is electrically disconnected from the vehicle system by turning off the interrupting device 20, the current consumed by the BMS 90, which is always powered directly from the battery 10, Thereby minimizing the consumption current of the battery 10.

1, reference numeral 40 denotes a current sensor for detecting a current at a rear end of the shielding device 20, 50 denotes a voltage sensor for detecting a voltage at a rear end of the shielding device 20, Reference numeral 60 denotes a junction box, and 70 denotes an electric field load.

The voltage at the rear end of the cutoff device 20 sensed by the voltage sensor 50 may be provided to the relay control part and used as a factor for controlling the cutoff device 20. [ The junction box 60 is connected to the rear end of the shielding device 20 and can be connected to various low voltage electric field loads 70 of the vehicle to form mutual electrical connection between the connected elements.

Further, the present technology includes a shutdown device 20 for electrically connecting or disconnecting power supplied from the battery 10 to the electric field load 70; A sensing unit 110 for sensing an on / off state of the interrupting device 20 and a sensing unit 110 for sensing an off state of the interrupting device 20, A storage unit 120 for storing battery status data and vehicle information data and a display unit 130 for outputting a failure code or failure information to the display device 80 based on the data stored in the storage unit 120 And a controller 100 configured.

Here, the battery state data may include at least one of a current, a voltage, and a battery SOC, and the vehicle information data may include at least one of a starting state of the vehicle, a driving distance, or wake-up mode data .

That is, the present technology turns off the shutdown device 20 when the performance of the low-voltage battery is expected to deteriorate rapidly, such as overload, overdischarge, low voltage, low SOC, overtemperature, And converts it into a failure code or malfunction information and displays it to the outside, thereby enabling the driver or mechanic to recognize the malfunctioning situation and to take subsequent measures to the vehicle.

The display device 80 may be a display or a sound generating device such as a GSCAN, a GDS, a cluster, a vehicle diagnostic display device, a navigation device, a speaker, or the like so that a driver or a mechanic can visually check a malfunction code or malfunction information of the vehicle .

As described above, the present technology includes a voltage sensor 50 and a current sensor 40 connected to the rear end of the shielding device 20 and detecting voltage and current, respectively. And a relay control unit of the BMS 90 for controlling the on / off control of the blocking device 20.

Therefore, the sensing unit 110 of the controller 100 determines whether the voltage detected by the voltage sensor 50 is less than a predetermined threshold value, the current value detected by the current sensor 40 is 0 A, When the relay off (OFF) control signal is received from the control unit, the shutoff device 20 may be turned off.

In addition, it is preferable that the storage unit 120 is a nonvolatile memory device such as an EEPROM. Even if the vehicle is turned off, a failure code or failure information So that the driver or the mechanic can check them.

The display unit 130 may output a failure code for the vehicle state using the current, voltage, battery SOC, travel distance, vehicle start state, or wake-up mode information stored in the storage unit 120 .

For example, if the vehicle is woken up by a real-time coollock, it can detect low-voltage battery conditions such as overdischarge, overcurrent, overcurrent overcharge, and overvoltage charging depending on current, voltage, and battery SOC. Further, if the wake-up is performed in a state where the vehicle is turned off, it is possible to detect a dark current excess or a vehicle overload condition condition according to the voltage detected from the voltage sensor. When the BMS 90 wakes up due to the operation of the reconnection switch 30, the malfunctioning state of the reconnection switch 30 and the overvoltage charging state can be detected according to the voltage. In case of wake-up under ACC ON, IG ON and START ON, it is possible to detect the discharging situation due to ACC or IG holding and leaving, overvoltage charging status, have.

Thus, by using the current, the voltage, the battery SOC, the vehicle starting state, and the wakeup mode information, it is possible to classify the failure state of the vehicle and to code each failure.

In addition, the display unit 130 can display a situation in which the current sensor or the voltage sensor is faulty, or the case where the driving distance is less than or equal to the threshold value and the cut-off device 20 is turned off as an inline operation situation as a failure code.

Various functions and effects of the battery management system of a vehicle having the above-described configuration will now be described in more detail.

2 is a flowchart illustrating an operation of a fault information processing system of a vehicle according to an embodiment of the present invention. Referring to FIGS. 1 and 2, when the sensing unit 110 senses an OFF state of the cut-off device 20 (S200), the storage unit 120 stores vehicle data at that point of time (S210) , The display unit 130 outputs the failure code or the failure information to the display device 80 based on the stored data so that the driver or the mechanic can easily grasp the reason for the blocking device 20 being blocked and the follow-up action .

According to the fault information processing system of the vehicle constructed as described above, when the relay between the low-voltage battery and the electric-field load is shut off, the vehicle information is stored and displayed so that the driver or the mechanic can understand the cause of the fault Can be easily grasped.

While the present invention has been particularly shown and described with reference to specific embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the following claims It will be apparent to those of ordinary skill in the art.

10: Battery 20: Shut-off device
30: reconnect switch 40: current sensor
50: voltage sensor 60: junction box
70: electric field load 80: display device
90: BMS 100: Controller
110: sensing unit 120:
130:

Claims (6)

A blocking device for electrically connecting or disconnecting power supplied from the battery to the electric field load; And
A storage unit for storing battery status data and vehicle information data when the sensing unit senses an OFF state of the interception device; And a display unit for outputting a failure code or failure information to the display device based on the data stored in the storage unit. The method according to claim 1,
And a voltage sensor connected to a rear end of the blocking device to detect a voltage,
Wherein the sensing unit senses the blocking device as an OFF state when the voltage detected by the voltage sensor becomes less than a preset threshold value. The method according to claim 1,
And a current sensor connected to a rear end of the blocking device to detect a current,
Wherein the sensing unit senses the blocking device as an OFF state when the current value detected from the current sensor is 0A. The method according to claim 1,
And a relay control unit for controlling on / off of the shutdown device,
And the sensing unit detects the blocking device off when receiving a blocking device off control signal from the relay control unit. The method according to claim 1,
Wherein the storage unit is a non-volatile memory device. The method according to claim 1,
Wherein the battery state data includes at least one of a current, a voltage, and a battery SOC,
Wherein the vehicle information data includes at least one of a starting state of the vehicle, a driving distance, and wake-up mode data.

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