KR20220020517A - Junction box control device and method thereof - Google Patents

Abstract

The present invention relates to a vehicle power distribution device and a method thereof, in which one among constant power, key-on power and ACC power can be selected and used according to the control of a controller when power is distributed by a junction box in a vehicle. The vehicle power distribution device according to the present invention has higher extensibility than that of an existing vehicle junction box as a supply source for constant power, key-on power and ACC power can be selected and set after the manufacture of the vehicle junction box. In addition, excessive voltage, excessive current and overheating, which occur on a component in the vehicle power distribution device, can be checked easily through a dashboard, and re-connection can be performed without replacing a fuse. In addition, electric current can be supplied to a necessary component through long-distance communication. In addition, it is possible to inspect a fuse and a relay through communication, and to grasp a part where burning damage has occurred. In addition, the vehicle power distribution device can operate even if the vehicle junction box malfunctions. The vehicle power distribution device comprises a controller, a multiplexer, and a power switching unit.

Description

Vehicle power distribution device and method {Junction box control device and method thereof}

The present invention relates to an apparatus and method for distributing power to a vehicle, and more particularly, when power is distributed through a junction box in a vehicle, among regular power, Key On power, and ACC power under the control of a controller It relates to a vehicle power distribution apparatus and method for selecting and using one.

In general, a junction box is provided in an engine room and interior of a vehicle to distribute power to a plurality of electric devices.

Dozens of fuses and relays are provided in a vehicle, and if these fuses and relays are distributed and arranged, the structure becomes complicated and control becomes difficult. Accordingly, a junction box is used as a device for integrating a fuse and a relay in one place and distributing power to each electric device module.

As shown in FIG. 1 , a conventional vehicle junction box includes a battery 1 , a vehicle diagnosis display unit 2 , a power board 10 , and a load L.

Here, the power board 10 includes a control board 20 , a fuse and a relay 26 . In addition, the control board 20 includes a voltage regulator 21 , a micro controller unit (MCU) 22 , a diagnostic unit 23 , a relay driving unit 24 , and a CAN (Controller Area Network) transceiver unit. (25).

The conventional junction box having such a configuration is connected to the vehicle battery 1 for supplying power to various electronic components of the vehicle to control the power supply of the corresponding battery 1 . Accordingly, power supplied to various loads L in the vehicle is controlled to operate each electronic device in the vehicle.

In addition, the battery 1 of the vehicle applies power to the load L of various vehicles through the power board 10 . Here, the load L of the vehicle may be, for example, an air conditioner, a vehicle headlight, a fog lamp, a fan, a CDP (Compact Disk Player), a vehicle navigation system, a vehicle PC, and the like.

In addition, the voltage regulator 21 supplies driving power to the MCU 22 by adjusting the voltage applied from the battery 1 .

In addition, the MCU 22 collects and outputs the operation record in the vehicle junction box, and transmits the open and short information of the load L diagnosed through the diagnosis unit 23 to the can transceiver 25 . do. Also, the MCU 22 is connected to the CAN transceiver 25 and receives operation signals related to various electronic devices applied from the CAN transceiver 25 to control the switching operation of the relay driving unit 24 and the like. In addition, the MCU 22 serves to control all operations within the vehicle junction box.

In addition, the diagnosis unit 23 diagnoses the power of the battery 1 using the contact impedance of the fuse and the relay 26 to diagnose the open and short circuit of the load L operated using the fuse and the relay 26 . do. Then, the diagnosis unit 23 transmits the diagnosed open and short information of the load L to the MCU 22 .

In addition, the relay driving unit 24 controls the relay driving of the fuse and the relay 26 . The fuse and relay 26 serve to prevent damage to vehicle equipment due to short circuit or reverse current.

In addition, the CAN transceiver 25 transmits/receives diagnostic information of the load L applied from the MCU 22 to and from the vehicle diagnosis display unit 2 . Accordingly, whether the load L diagnosed by the diagnosis unit 23 is abnormal is notified to the vehicle diagnosis display unit 2 using CAN communication. On the other hand, information applied from the vehicle diagnosis display unit 2 is transmitted to the MCU 22 .

In addition, the vehicle diagnosis display unit 2 may display specific causes of vehicle failure, for example, non-operation of vehicle load due to open and short of load L or damage to a specific vehicle load due to overcurrent, etc. to the driver or It is a device that displays this so that a mechanic can easily know it.

In general, a vehicle mainly uses three types of power sources. The first is constant power and uses power supplied from the battery. The second uses the Key On power supplied when the car key is plugged in. The third uses ACC power supplied from the alternator when the vehicle's ignition is on.

However, the conventional vehicle junction box as described above has a problem in that it is impossible to flexibly manage the three power sources described above.

Korean Patent Publication No. 10-1723043 (Registration date March 29, 2017)

An object of the present invention for solving the above-mentioned problems is to select one of the regular power, the Key On power, and the ACC power according to the control of the controller when power is distributed through the junction box in the vehicle To provide a vehicle power distribution device and method to be used.

A vehicle power distribution device according to an embodiment of the present invention for achieving the above object is a vehicle power distribution device that distributes and supplies power through a fuse and a relay. a controller outputting a selection signal for selecting one of the power sources; a multiplexer outputting switching signals according to the selection signal output from the controller; and a power switching unit for switching and connecting to one of a regular power supply, a key-on power supply, and an ACC power supply according to a switching signal output from the multiplexer. includes

On the other hand, the vehicle power distribution method according to an embodiment of the present invention for achieving the above object is a vehicle power distribution method by a vehicle power distribution device that distributes and supplies power through a fuse and a relay, (a) a controller outputting a selection signal for selecting one of virtual constant power, key on power, and ACC power; (b) outputting, by a multiplexer, a switching signal according to the selection signal output from the controller; and (c) switching the power switching unit to one of a regular power supply, a key-on power supply, and an ACC power supply according to the switching signal output from the multiplexer.

According to the present invention, the existing vehicle junction box needs to be re-manufactured when the supply power is different depending on the equipment characteristics, but the vehicle junction box according to the present invention is a supply source for constant power, key-on power, and ACC power. In that the vehicle power distribution device can be selected and set after the vehicle junction box is manufactured, there is an advantage of high expandability compared to the existing vehicle junction box.

In addition, there is an advantage in that it is possible to check the transient voltage, transient current, overheat, etc. occurring in the component of the vehicle power distribution device, and to know it easily through the instrument panel, and to be able to reconnect without replacing the fuse.

In addition, there is an advantage that current can be supplied to a necessary component through communication over a long distance.

In addition, it is possible to check the vehicle power distribution device through communication, and there is an advantage in that it is possible to determine the part where the burnout has occurred.

In addition, there is an advantage that it is possible to provide a vehicle power distribution device configured to be able to operate even if the vehicle junction box fails.

1 is a block diagram of a conventional vehicle junction box.
2 is a block diagram of a vehicle junction box to which the present invention is applied.
3 is a configuration diagram schematically showing the configuration of a vehicle power distribution device according to the first embodiment of the present invention.
4 is a diagram illustrating an example of a multiplexer according to an embodiment of the present invention.
5 is a diagram illustrating another example of a multiplexer according to an embodiment of the present invention.
6 is a diagram illustrating a structure of a vehicle power distribution device according to a second embodiment of the present invention.
7 is a configuration diagram schematically illustrating the configuration of a vehicle power distribution device according to a third embodiment of the present invention.
8 is a diagram illustrating a forced button unit for applying forced power to a vehicle junction box in a vehicle power distribution device according to a third embodiment of the present invention.
9 is a view illustrating an operation state of a forced button unit for applying forced power to a vehicle junction box in a vehicle power distribution device according to a third embodiment of the present invention.
10 is a flowchart illustrating an operation process when an excessive current occurs in a vehicle power distribution device according to an embodiment of the present invention.
11 is a view showing a screen for warning by displaying on the instrument panel that an excessive current has occurred in the vehicle power distribution device according to an embodiment of the present invention.

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the technical field to which the present invention belongs It is provided to fully inform the possessor of the scope of the invention, and the present invention is only defined by the scope of the claims. Accordingly, in some embodiments, well-known process steps, well-known device structures, and well-known techniques have not been specifically described in order to avoid obscuring the present invention. Like reference numerals refer to like elements throughout.

In order to clearly express various layers and regions in the drawings, the thicknesses are enlarged. Throughout the specification, like reference numerals are assigned to similar parts. When a part, such as a layer, film, region, plate, etc., is “on” another part, it includes not only cases where it is “directly on” another part, but also cases where there is another part in between. Conversely, when we say that a part is "just above" another part, we mean that there is no other part in the middle. Also, when a part of a layer, film, region, plate, etc. is said to be "under" another part, it includes not only the case where it is "directly under" another part, but also the case where there is another part in the middle. Conversely, when a part is said to be "just below" another part, it means that there is no other part in the middle.

Spatially relative terms "below", "beneath", "lower", "above", "upper", etc. It can be used to easily describe the correlation between an element or components and other elements or components. The spatially relative terms should be understood as terms including different orientations of the device during use or operation in addition to the orientation shown in the drawings. For example, when an element shown in the figures is turned over, an element described as "beneath" or "beneath" another element may be placed "above" the other element. Accordingly, the exemplary term “below” may include both directions below and above. The device may also be oriented in other orientations, and thus spatially relative terms may be interpreted according to orientation.

In the present specification, when a part is said to be connected to another part, this includes not only a case in which it is directly connected, but also a case in which it is electrically connected with another element interposed therebetween. In addition, when it is said that a part includes a certain component, this means that other components may be further included, rather than excluding other components, unless otherwise stated.

In this specification, terms such as first, second, third, etc. may be used to describe various components, but these components are not limited by the terms. The above terms are used for the purpose of distinguishing one component from other components. For example, without departing from the scope of the present invention, a first component may be referred to as a second or third component, and similarly, the second or third component may be alternately named.

Unless otherwise defined, all terms (including technical and scientific terms) used herein may be used with the meaning commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, terms defined in a commonly used dictionary are not to be interpreted ideally or excessively unless clearly defined in particular.

Hereinafter, a vehicle power distribution device according to the present invention will be described with reference to FIGS. 2 to 11 .

2 is a block diagram of a vehicle junction box to which the present invention is applied.

Referring to FIG. 2 , a vehicle junction box to which the present invention is applied includes a battery 1 , a vehicle diagnosis display unit 2 , a power board 10 , and a load L.

The power board 10 includes a control board 20 , a voltage regulator 21 , a microcontroller unit 22 , a diagnosis unit 23 , a CAN transceiver unit 25 , and a vehicle power distribution device 200 . includes

The vehicle junction box of the present invention having such a configuration is connected to the vehicle battery 1 for supplying power to various electronic components of the vehicle to control the power supply of the corresponding battery 1 . Accordingly, power supplied to various loads L in the vehicle is controlled to operate each electronic device in the vehicle.

Here, the battery 1 of the vehicle applies power to the load L of various vehicles through the power board 10 . Here, the load L of the vehicle may be, for example, an air conditioner, a vehicle headlight, a fog lamp, a fan, a CDP (Compact Disk Player), a vehicle navigation system, a vehicle PC, and the like.

In addition, the voltage regulator 21 supplies driving power to the MCU 22 by adjusting the voltage applied from the battery 1 .

In addition, the MCU 22 collects and outputs the operation record in the vehicle junction box, and transmits the open and short information of the load L diagnosed through the diagnosis unit 23 to the can transceiver 25 . do.

Then, the MCU 22 is connected to the CAN transceiver 25 and receives operation signals related to various electronic devices applied from the CAN transceiver 25 to control the switching operation of the vehicle power distribution device 200 and the like. . In addition, the MCU 22 serves to control all operations within the vehicle junction box.

In addition, the diagnosis unit 23 uses the contact impedance of the vehicle power distribution device 200 to apply the power of the battery 1 to diagnose the open and short circuit of the load L operated using the vehicle power distribution device 200 . and transmits the diagnosed open and short information of the load L to the MCU 22 .

In addition, the CAN transceiver 25 transmits/receives diagnostic information of the load L applied from the MCU 22 to and from the vehicle diagnosis display unit 2 . Accordingly, whether the load L diagnosed by the diagnosis unit 23 is abnormal is notified to the vehicle diagnosis display unit 2 using CAN communication. On the other hand, information applied from the vehicle diagnosis display unit 2 is transmitted to the MCU 22 .

In addition, the vehicle diagnosis display unit 2 determines the specific cause of the vehicle failure, for example, non-operation of the vehicle load due to the open and short of the load L, or damage to a specific vehicle load due to overcurrent to the driver or It is a device that displays this so that a mechanic can easily know it.

As a result, the driver or the mechanic can clearly confirm the error information of the vehicle load L through the vehicle diagnosis display unit 2 visually and audibly. Accordingly, when the driver and the mechanic check the result that the corresponding load L does not operate properly, it is possible to clearly understand in which part the failure occurred, and it is possible to take immediate action against the failure.

Meanwhile, the vehicle power distribution device 200 will be described in detail below with reference to FIG. 3 .

3 is a configuration diagram schematically showing the configuration of a vehicle power distribution device according to the first embodiment of the present invention.

Referring to FIG. 3 , the vehicle power distribution device 200 according to the first embodiment of the present invention distributes power to one of a constant power supply, a key on power supply, and an ACC power supply through a multiplexer type vehicle power supply. It may be referred to as a distribution device 200 .

For this purpose, the vehicle power distribution apparatus 200 according to the first embodiment of the present invention may include a controller 210 , a multiplexer 220 , and a power switching unit 230 .

The controller 210 outputs selection signals 00, 01, 10, and 11 for selecting one of the regular power, the key on power, and the ACC power.

The multiplexer 220 outputs the switching signals IN0 , IN1 , and IN2 according to the selection signal output from the controller 210 . Here, among the switching signals, the IN0 signal is a signal that turns on the power at all times, the IN1 signal is a signal that turns on the key-on power, and the IN2 signal is a signal that turns on the ACC power. can

The multiplexer 220 is configured separately from the controller 210 , but may be located inside the controller 210 .

The power switching unit 230 is connected to one of a regular power supply, a key-on power supply, and an ACC power supply according to a switching signal output from the multiplexer 220 .

The constant power is power that is constantly supplied from the battery.

Key On power is the start power used to start the vehicle.

ACC power is the power supplied from the alternator to audio devices, air conditioners, and heating wires when the vehicle is turned on. It refers to the power supplied while the car key is in the Acc position after the vehicle is started.

4 is a diagram illustrating an example of a multiplexer according to an embodiment of the present invention.

The multiplexer 220 according to an embodiment of the present invention may be implemented as a 3×1 MUX as shown in FIG. 4 .

The 3×1 MUX has two selection lines SEL0 and SEL1, three input lines IN0, IN1, IN2, and one output line OUT.

At this time, among the three input lines, the IN0 line is connected to the regular power, the IN1 line is connected to the Key On power, and the IN2 line is connected to the Acc power.

The two selection lines SEL0 and SEL1 are connected to the controller 210 .

Therefore, according to the values input to the two selection lines SEL0 and SEL1, the output shown in Table 1 below can be obtained.

SEL OUT 00 IN0 01 IN1 10 IN2 11 IN2

That is, when “00” is input to the two selection lines SEL0 and SEL1, the IN0 signal is output to the output line OUT and the power is always turned on. When “01” is input, the IN1 signal is output and the Key On The power is turned on, and when “10” or “11” is input, the IN2 signal is output to turn on the Acc power.

5 is a diagram illustrating another example of a multiplexer according to an embodiment of the present invention.

The multiplexer 220 according to an embodiment of the present invention may be implemented as a 3×1 MUX using a 2×1 MUX as shown in FIG. 5 .

The other 3×1 MUX has a structure in which two 2×1 MUXs are connected, so that the output of one 2×1 MUX is input to the other 2×1 MUX, and three input lines (IN0, IN1, IN2 ), two selection lines SEL0 and SEL1, and one output line OUT.

Similarly, when “00” is input to the two selection lines SEL0 and SEL1 from the controller 210, the IN0 signal is output to turn on the power at all times, and when “01” is input, the IN1 signal is output and the Key On The power is turned on, and when “10” or “11” is input, the IN2 signal is output to turn on the Acc power.

6 is a diagram illustrating a structure of a vehicle power distribution device according to a second embodiment of the present invention.

Referring to FIG. 6 , the vehicle power distribution device according to the second embodiment of the present invention includes: a ground layer 510; ACC power layer 520 located on the ground layer; a key on (Key On) power layer 530 located on the ACC power layer; a constant power layer 540 positioned on the key-on power layer; and a control layer 550 positioned on the constant power layer.

At this time, the control layer 550 passes through the via hole 560 from the control layer 550 to the ground layer 510 , and the control layer 550 passes through the via hole 560 to the ACC power layer 520 and key on. It may be selectively connected to one of the power layer 530 and the constant power layer 540 .

In addition, when the control layer 550 is electrically connected to the ACC power layer 520 through the via hole 560 , the ACC power may be connected and supplied.

In addition, when the control layer 550 is electrically connected to the key-on power layer 530 through the via hole 560 , the key-on power supply may be connected and supplied.

In addition, when the control layer 550 is electrically connected to the constant power layer 540 through the via hole 560 , the constant power may be connected and supplied.

7 is a configuration diagram schematically illustrating the configuration of a vehicle power distribution device according to a third embodiment of the present invention.

Referring to FIG. 7 , the vehicle power distribution device according to the third embodiment of the present invention includes a voltage detection unit 620 , a current detection unit 630 , a display unit 640 , a control unit 650 , and a CAN transceiver unit. (25) may be included.

Among the elements shown in FIG. 7 , the same reference numerals are used for the same elements as those shown in FIG. 2 .

The vehicle junction box 610 is connected to the battery 1 , the generator (Alternator, ALT), and the display unit 640 , and distributes and supplies power through the vehicle power distribution device 200 .

The voltage detector 620 detects a voltage of the vehicle power distribution device 200 .

The current detector 630 detects a current flowing through the vehicle power distribution device 200 or a current flowing through a fuse and a relay of the vehicle power distribution device 200 .

The display unit 640 displays a power supply abnormal state of the vehicle power distribution device 200 . The display unit 640 may be, for example, an instrument panel of a vehicle.

The controller 650 controls the power supply through the vehicle power distribution device 200 , for example, stops the power supply or cuts off the current through the vehicle power distribution device 200 .

The CAN transceiver 25 electrically connects the control unit 650 and the display unit 640 . Accordingly, the control unit 650 may transmit the control processing result or device operation process to the display unit 640 through the can transceiver 25 and output it on the display unit 640 .

When the voltage of the vehicle power distribution device 200 detected through the voltage detection unit 620 is detected as an excessive voltage greater than or equal to the reference voltage, the control unit 650 transmits a message guiding that an error has occurred in the equipment to the CAN transceiver unit 25 ) to the display unit 640 and control the vehicle power distribution device 200 to temporarily stop the power supply.

In addition, the vehicle power distribution apparatus according to another embodiment of the present invention may further include a temperature detector for detecting the temperature of the vehicle power distribution apparatus 200 .

When the internal temperature of the vehicle power distribution device 200 detected through the temperature detection unit rises above 100 ° C., the control unit 650 lowers the limit current to the minimum operating current, and consumes more current than the minimum operating current. The working lamp or other parts are turned off, and when the internal temperature of the vehicle power distribution device 200 is below a certain level, it is possible to control the minimum operating current to be supplied as the normal operating current.

And, the vehicle power distribution device according to another embodiment of the present invention, as shown in FIG. 8 , may further include a forced button unit for applying forced power to the vehicle power distribution device 200 . 8 is a diagram illustrating a forced button unit for applying forced power to the vehicle power distribution device 200 in the vehicle power distribution device according to the third embodiment of the present invention. In FIG. 8 , the force button unit includes a selection button 710 and an operation button 720 . The selection button 710 is composed of six ON/OFF buttons as shown in FIG. 8 , but is not limited thereto and may be configured in a smaller number or a larger number. That is, the selection button 710 may select one of regular power, Key On power, and ACC power according to the ON or OFF state of each button among the six on/off buttons. The operation button 720 supplies power corresponding to the selection of the selection button 710 .

For example, in the selection button 710 of FIG. 7 , when button 1, button 3, and button 5 are in an ON state, and the remaining buttons are in an OFF state, the selection button 710 is always powered You choose to be approved. At this time, when the operation button 720 is pressed by the user, the corresponding constant power is supplied according to the selection of the selection button 710 .

As described above, the forced button unit applies the selected power to the fuse and the relay according to the selection of the selection button 710 and the ON operation of the operation button 720 during the emergency operation of the vehicle power distribution device 200 . it will be used to

Here, the forced button unit may be installed on a part of the front surface of the vehicle power distribution device 200 or installed on the rear surface thereof.

As shown in FIG. 9 , in the normal operation state of the vehicle power distribution device 200 , the operation button 720 is switched and connected to the MCU, that is, the controller 650 . 9 is a view illustrating an operation state of a force button unit for applying forced power to the vehicle power distribution apparatus 200 in the vehicle power distribution apparatus according to the third embodiment of the present invention. In FIG. 9, when the operation button 720 is pressed by the user in the abnormal operation state of the vehicle junction box 610, the operation button 720 is turned on and the emergency power of 1.5V is turned on by the selection button ( 710), and the selection button 710 causes one of forced power among regular power, Key On power, and ACC power to be supplied to a single device (Component) according to the switching connection state as shown in FIG. 8 .

10 is a flowchart illustrating an operation process when an excessive current occurs in the vehicle power distribution device 200 according to an embodiment of the present invention.

Referring to FIG. 10 , in the vehicle power distribution device according to the present invention, the vehicle power distribution device 200 supplies one of regular power, key-on power, and ACC power, and the control unit 650 controls the current detection unit 630 . The current of the vehicle power distribution device 200 is detected through (S910).

That is, the current detection unit 630 detects a current flowing out to each fuse and relay of the vehicle power distribution device 200 .

At this time, the control unit 650 outputs the selection signals 00, 01, 10, 11, the multiplexer 220 outputs the switching signals IN0, IN1, IN2 according to the selection signal, and the power switching unit 230 is switched to one of the regular power, key-on power, and ACC power according to the switching signal. Accordingly, the vehicle power distribution device 200 supplies one of the regular power, the key-on power, and the ACC power.

Here, the multiplexer 220 outputs an IN0 switching signal so that the power is always turned on when receiving the selection signal “00” from the control unit 650 , and when receiving the selection signal “01” from the control unit 650 , turns on the key The IN1 switching signal is output so that the power is ON, and when the selection signal “10” or “11” is received from the control unit 650 , the IN2 switching signal may be output so that the Acc power is ON.

In addition, as shown in FIG. 6 , the vehicle power distribution device 200 includes a ground layer 510 , an ACC power layer 520 , a key-on power layer 530 , and a regular power layer 540 . and a control layer 550 , which penetrates from the control layer 550 to the ground layer 510 through the via hole 560 , so that the control layer 550 passes through the via hole 560 to the ACC power layer, the key By selectively connecting one of the on power layer and the regular power layer, one of the constant power, the key on power, and the ACC power can be supplied.

Next, the controller 650 recognizes that an excessive current has occurred when the detected current is detected for a predetermined period of time (seconds) or longer than the set current (S920).

Then, when an excessive current of the vehicle power distribution device 200 occurs, the control unit 650 controls the vehicle power distribution device 200 to stop the current supply, and detects abnormalities in the fuse and relay currents of the vehicle power distribution device 200 . A guide message is transmitted to the display unit 640 through the CAN transceiver 25 (S930).

Accordingly, the display unit 640 such as the instrument panel displays and outputs a message guiding abnormalities in the fuse and relay current of the vehicle power distribution device 200 in a pop-up state on the screen (S940).

In addition, as a result of detecting currents going out to each fuse and relay of the vehicle power distribution device 200 through the current detection unit 630 , the controller 650 detects an inrush current corresponding to a predetermined multiple of the set voltage. When it is detected for more than 0.1 second, the vehicle power distribution device 200 is controlled to cut off the current supply, and a message guiding the current abnormality of the fuse and relay is transmitted to the display unit 640 through the CAN transceiver unit 25 . can

In addition, the control unit 650 checks the detection of the transient current in units of 0.01 seconds through the current detection unit 630 and, when the set current value is reached, turns off the vehicle power distribution device 200 for 0.1 second, and then again It is turned on, and even after that, the detection of transient current is checked every 0.01 second, and when the set current value is reached, the operation of turning on again after turning off after 0.1 second can be repeated.

Here, the vehicle power distribution device according to the present invention may include a check completion button for checking an abnormal state of the vehicle power distribution device 200 and inputting that the check has been completed. Therefore, an abnormal state of the vehicle power distribution device 200 is displayed on the instrument panel of the vehicle, and after the driver or user checks this and takes emergency measures, it is possible to input that the inspection has been completed through the inspection completion button.

Then, when the check completion button is input (S950-Yes), the control unit 650 reconnects the vehicle power distribution device 200 (S960).

However, if the check completion button is not input (S950 - No), the control unit 650 continues to maintain the separation state of the vehicle power distribution device 200 (S970).

Then, the control unit 650 transmits a message guiding such a state to the display unit 640 through the CAN transceiver unit 25 so that it can be displayed on the instrument panel as shown in FIG. 11 . 11 is a view showing a screen for warning by displaying on the instrument panel that an excessive current has occurred in the vehicle power distribution device 200 according to an embodiment of the present invention. In FIG. 11 , the display unit 640 such as the instrument panel outputs a message guiding that an over current has occurred in the fuse and the relay on the screen, and also a message such as “maintain unchecked” or “check complete” also display output.

Accordingly, the driver of the vehicle can take emergency measures by checking the information displayed on the instrument panel and checking the vehicle power distribution device 200 .

As described above, according to the present invention, when power is distributed from the vehicle through the vehicle power distribution device, one of the regular power, the Key On power, and the ACC power can be selected and used according to the control of the controller, A vehicle power distribution apparatus and method may be realized.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and it is common in the technical field to which the present invention pertains that various substitutions, modifications and changes are possible within the scope without departing from the technical spirit of the present invention. It will be clear to those who have the knowledge of

1: Battery 2: Vehicle diagnostic display unit
10: power board 20: control board
21: voltage regulator 22: MCU
23: diagnostic unit 25: CAN transceiver unit
200: vehicle power distribution device 210: controller
220: multiplexer 230: power switching unit
L: load SEL0, SEL1: selection line
IN0, IN1, IN2: input line OUT: output line
510: ground layer 520: ACC power layer
530: Key ON power layer 540: constant power layer
550: control layer 610: vehicle junction box
620: voltage detection unit 630: current detection unit
640: display unit (instrument panel) 650: control unit
ALT: Generator 710: Select button
720: operation button

Claims (14)

A vehicle power distribution device that distributes and supplies power through fuses and relays,
a controller for outputting a selection signal for selecting one of constant power, key on power, and ACC power;
a multiplexer outputting switching signals according to the selection signal output from the controller; and
A vehicle power distribution device comprising a; a power switching unit for switching and connecting to one of a regular power supply, a key-on power supply, and an ACC power supply according to the switching signal output from the multiplexer.
The method of claim 1,
The switching signals include an IN0 signal, an IN1 signal, and an IN2 signal,
The IN0 signal always turns on the power,
The IN1 signal turns on the Key On power,
The IN2 signal is a vehicle power distribution device that is a signal for turning on the ACC power.
The method of claim 1,
Ground Layer;
an ACC power layer positioned on the ground layer;
a key-on power layer positioned on the ACC power layer;
a constant power layer positioned on the key-on power layer; and
It further comprises; a control layer located on the constant power layer;
Penetrates through a via hole from the control layer to the ground layer,
and the control layer is selectively connected to one of an ACC power layer, a key-on power layer, and a regular power layer through the via hole.
4. The method of claim 3,
ACC power is supplied when the control layer is electrically connected to the ACC power layer through the via hole,
When the control layer is electrically connected to the key-on power layer through the via hole, key-on power is supplied;
The vehicle power distribution device, wherein when the control layer is electrically connected to the constant power layer through the via hole, constant power is supplied.
According to claim 1,
a voltage detection unit detecting a voltage of the vehicle power distribution device;
a current detection unit detecting a current flowing to the fuse and the relay of the vehicle power distribution device;
a display unit for displaying an abnormal power supply state of the vehicle power distribution device;
a control unit controlling the fuse and the relay to stop the power supply or cut off the current; and
A vehicle power distribution device including a; a CAN transceiver for connecting the control unit and the display unit.
6. The method of claim 5,
When the voltage of the vehicle power distribution device is detected as an excessive voltage greater than or equal to the reference voltage through the voltage detection unit, the control unit transmits a message informing that an error has occurred in the equipment to the display unit through the can transceiver unit, and the fuse and a vehicle power distribution device for temporarily stopping power supply by controlling the relay.
6. The method of claim 5,
When the current flowing out to each fuse and relay of the vehicle power distribution device through the current detection unit detects a current equal to or greater than the set current for a predetermined time (seconds) or longer, the control unit controls the fuse and the relay to stop supplying current, and transmitting a message guiding an abnormality of the fuse and relay current to the display unit through the CAN transceiver unit.
6. The method of claim 5,
When an inrush current corresponding to a predetermined multiple of a set voltage for 0.1 second or more is detected through the current detection unit, the control unit controls the fuse and relay control to cut off the current supply and transmit a message guiding an abnormal current of the fuse and relay to the display unit through the can transceiver unit.
6. The method of claim 5,
The control unit checks the detection of the transient current in units of 0.01 seconds through the current detection unit, and when the set current value is reached, the control unit turns off the fuse and the relay for 0.1 second, turns it on again, and thereafter, 0.01 A vehicle power distribution device that checks the detection of transient current in seconds and repeats the operation of turning on again after turning off after 0.1 seconds when the set current value is reached.
6. The method of claim 5,
Further comprising; a temperature detection unit for detecting the temperature of the vehicle power distribution device,
When the internal temperature of the vehicle power distribution device rises above 100 ° C, the control unit lowers the limit current to the minimum operating current, and the working lamp or other parts that consume more current than the minimum operating current A vehicle power distribution device that controls to supply a minimum operating current as a normal operating current when the internal temperature of the vehicle power distribution device is below a certain level by turning it off.
6. The method of claim 5,
Further comprising; a forced button unit for applying forced power to the vehicle power distribution device;
Power is applied to the fuse and the relay according to a button-on operation of the forced button unit during an emergency operation of the vehicle power distribution device.
A vehicle power distribution method by a vehicle power distribution device that distributes and supplies power through a fuse and a relay, comprising:
(a) outputting, by the controller, a selection signal for selecting one of regular power, key on power, and ACC power;
(b) outputting, by a multiplexer, a switching signal according to the selection signal output from the controller; and
(c) a power switching unit switching and connecting to one of a regular power supply, a key-on power supply, and an ACC power supply according to a switching signal output from the multiplexer;
13. The method of claim 12,
(d) inputting a selection signal for selecting one of the constant power, the key-on power, and the ACC power to the vehicle power distribution device;
(e) electrically connecting the control layer to a layer corresponding to the selection signal among the ACC power layer, the key-on power layer, and the constant power layer through a via hole; and
(f) the vehicle power distribution device supplying power through a layer electrically connected to the control layer; further comprising,
The vehicle power distribution device,
When an excessive current is detected, an emergency operation is performed to stop the current supply through the fuse and relay.
Controls so that forced power is applied to the fuse and relay according to the selection of the selection button of the forced button unit and the ON operation of the operation button during the emergency operation,
A plurality of selection buttons of the forcible button unit are selectively turned on or off and forcing power to be supplied according to an input of the operation button, the vehicle power distribution method.
13. The method of claim 12,
(g) supplying, by the vehicle power distribution device, one of regular power, key-on power, and ACC power;
(h) detecting a current of the vehicle power distribution device by a current detection unit;
(i) controlling the fuse and the relay to stop the current supply when the detected current is an excessive current;
(j) transmitting, by the control unit, a message guiding the transient current state of the vehicle power distribution device to the display unit through CAN communication; and
(k) displaying and outputting, by the display unit, a message guiding the transient current state of the vehicle power distribution device;

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