KR102347508B1 - Control apparatus and method for multi power source - Google Patents

Abstract

The present invention discloses an apparatus and method for controlling vehicle power multiplexing. The present invention installs a main battery and an auxiliary battery, classifies the loads in the vehicle into a plurality of groups, and then controls on/off control of a plurality of switches inside the vehicle power multiplexing control device according to the preferred embodiment of the present invention. By allowing the group to always receive power from either the main battery or the auxiliary battery, it is possible to stably supply power to the loads in the vehicle.

Description

Vehicle power multiplexing control apparatus and method {Control apparatus and method for multi power source}

The present invention relates to an apparatus and method for controlling vehicle power, and more particularly, to an apparatus and method for controlling vehicle power multiplexing.

Recently, various convenience devices have been installed inside a vehicle, and all of these convenience devices operate by receiving power from the vehicle's battery. As such, as the power demand of the vehicle increases, the demand for installing an additional battery in the vehicle increases.

In particular, if only one battery is used, it is difficult to respond to a fail operation in the event of a failure of an autonomous driving-related load (steering device, braking device, etc.) even in the case of an autonomous driving vehicle, which has recently been attracting attention. In addition, even when a collision accident occurs in the vehicle, the power supply from the main battery to the safety-related loads (such as the door lock) is cut off due to an external collision, and in this case, it is difficult to supply power to the safety-related loads again. It is difficult to ensure the safety of vehicle occupants.

1A and 1B are diagrams illustrating a configuration diagram of a power supply of a vehicle according to the prior art. As shown in FIGS. 1A and 1B , when many convenient devices consume power, it is difficult to secure starting performance of the main battery due to increased power consumption during parking and driving, as well as large power loads (ISG, MDPS, etc.) ), there is a risk of malfunction of sensitive loads due to instantaneous voltage fluctuations during operation.

Accordingly, there is a need for a control apparatus and method capable of stably supplying and controlling power to loads when using multiple power sources by adding other power sources in addition to the main battery.

SUMMARY OF THE INVENTION An object of the present invention is to provide a vehicle power multiplexing control apparatus and method capable of stably supplying and controlling power to loads when using multiple power sources by adding other power sources in addition to a main battery.

A vehicle power multiplexing control apparatus according to a preferred embodiment of the present invention for solving the above problems is connected to a main battery and an auxiliary battery installed in a vehicle, and is connected to a plurality of loads in the vehicle, the main battery and the auxiliary battery A vehicle power multiplexing control device for supplying power from a battery to loads, connected between a plurality of load groups and the main battery and the auxiliary battery, according to a control signal input from an ICU (Integrated Central Control Unit) a switching module for supplying power to the plurality of load groups from the main battery or the auxiliary battery by turning on/off the included switches; and a bidirectional DC/DC converter connected between the main battery and the auxiliary battery in parallel with the switching module and controlled according to a control signal input from the switching module.

In addition, the switching module selectively turns on/off the switches according to the state of the vehicle so that power is always supplied to the plurality of load groups in all states of the vehicle except the parking state, and the bidirectional DC/DC You can control the converter.

In addition, the plurality of load groups include a first load group including steering and braking devices, a second load group including lamp devices, a third load group including devices that consume power during parking, and wakeup. a fourth load group including a device and a vehicle safety related device, wherein the first load group is always supplied with power by the main battery regardless of on/off operation of the switches, and the second load group is the Power is supplied from at least one of the main battery and the auxiliary battery according to the on/off operation of the switches, and the third load group is always supplied with power by the auxiliary battery regardless of the on/off operation of the switches, and The fourth load group may be supplied with power by the main battery and the auxiliary battery regardless of on/off operations of the switches.

In addition, the plurality of load groups may include a first load group to a third load group, and the switching module may include: a first switch and a third switch connected in parallel to the second load group; a second switch connected between the first switch and the main battery; a fourth switch connected between the third switch and the auxiliary battery; and a switching controller configured to control on/off of the first to fourth switches according to the control signal input from the ICU, wherein the forward directions of the parasitic diodes are opposite to each other in the first switch and the second switch It is a connected FET, and the third switch and the fourth switch may be FETs in which forward directions of parasitic diodes are opposite to each other.

In addition, in the second switch and the fourth switch, a forward direction of a parasitic diode may be a direction toward the second load group.

In addition, one end of the bidirectional DC/DC converter may be connected to the second switch and the main battery, and the other end of the bidirectional DC/DC converter may be connected to the fourth switch and the auxiliary battery.

Also, the first load group may be connected between the first switch and the second switch to receive power from the main battery at all times.

In addition, the third load group may be connected between the third switch and the fourth switch to always receive power from the auxiliary battery.

In addition, the plurality of load groups further include the fourth load group, and the fourth load group is directly connected to the main battery and the auxiliary battery through a diode having a forward direction of the fourth load group, respectively, and the main battery Power may be always supplied from the battery and the auxiliary battery.

In addition, in the vehicle power multiplexing control device, in the parking mode, the switching control unit turns off all the switches, the first load group receives power from the main battery through the parasitic diode of the second switch, and the second The third load group may receive power from the auxiliary battery through the parasitic diode of the fourth switch.

In addition, in the vehicle power multiplexing control device, in a standby mode or a start mode, the switching control unit turns on the first switch and the third switch, turns the second switch and the fourth switch off, and the first The load group receives power from the main battery through the parasitic diode of the second switch, the second load group receives power from the main battery through the parasitic diode of the second switch and the first switch, Power may be supplied from the auxiliary battery through the parasitic diode of the fourth switch and the third switch, and the third load group may receive power from the auxiliary battery through the parasitic diode of the fourth switch.

Also, in the vehicle power multiplexing control device, in the starting assist mode, the switching control unit turns on the DC/DC converter from the auxiliary battery to the main battery to supply charging power from the auxiliary battery to the main battery. have.

In addition, in the vehicle power multiplexing control device, in a driving mode, the switching control unit turns on the first switch and the second switch, turns the third switch and the fourth switch off, and the first load group Power is supplied from the main battery through the parasitic diode of the second switch, and the second load group receives power from the main battery through the parasitic diode of the second switch and the first switch, and the third load group may receive power from the auxiliary battery through the parasitic diode of the fourth switch.

In addition, in the vehicle power multiplexing control device, when the voltage of the main battery is maintained below a first threshold for a predetermined time, the switching control unit turns off the first switch and the second switch according to a control signal input from the ICU, The third switch and the fourth switch are turned on to supply power from the main battery to the first load group through the parasitic diode of the second switch, and at the same time, the parasitic diode of the fourth switch and the third switch Power is supplied from an auxiliary battery to the second load group, and when the voltage of the main battery is maintained above a second threshold for a predetermined time, the switching control unit may control the first switch and the second load group according to a control signal input from the ICU. By turning on the second switch and turning off the third switch and the fourth switch, only the main battery may supply power to the second load group.

In addition, the vehicle power multiplexing control device, in the driving mode, when an ISG (Idle Stop & Go) start-off signal or a communication abnormality detection signal (Stand Alone) is input from the ICU to the switching control unit, the switching control unit is The first switch and the third switch are turned on, and the second switch and the fourth switch are turned off, so that the first load group receives power from the main battery through a parasitic diode of the second switch, and The second load group receives power from the main battery through the parasitic diode of the second switch and the first switch, and receives power from the auxiliary battery through the parasitic diode of the fourth switch and the third switch, The third load group receives power from the auxiliary battery through the parasitic diode of the fourth switch, and an ISG (Idle Stop & Go) start-on signal is input from the ICU to the switching control unit, or a communication abnormality detection signal (Stand Alone) is no longer input, it may return to the driving mode, turn on the first switch and the second switch, and turn off the third switch and the fourth switch.

In addition, the vehicle power multiplexing control device includes: a photovoltaic power generation unit installed in the vehicle to convert sunlight into electric power and output a DC voltage; and converting the DC voltage output from the photovoltaic unit into a voltage level suitable for charging the main battery or a voltage level suitable for supplying power to the plurality of load groups to the main battery or the plurality of load groups It may further include a voltage converter for outputting the .

In addition, in a vehicle power multiplexing method according to a preferred embodiment of the present invention for solving the above-described problems, a first switch and a third switch connected in parallel to a second load group, and a connection between the first switch and a main battery a second switch, a fourth switch connected between the third switch and the auxiliary battery, and on/off of the first to fourth switches according to a control signal input from an integrated central control unit (ICU) and a switching control unit for controlling the second switch and the fourth switch, wherein a forward direction of a parasitic diode is a direction toward the second load group, and a forward direction of the parasitic diode is opposite to the first switch and the second switch of the first switch and the second switch a connected FET, the second switch and the fourth switch are FETs connected in opposite directions to each other in the forward direction of a parasitic diode, a first load group is connected between the first switch and the second switch, and a third load group is the A vehicle power multiplexing method performed in a vehicle power multiplexing control device connected between a third switch and the fourth switch, the method comprising: (a) maintaining all switches in an off state in a vehicle parking mode; (b) turning on the first switch and the third switch and turning off the second switch and the fourth switch when the vehicle is changed to the standby mode or the start mode; and (c) turning on, by the switching control unit, the first switch and the second switch, and turning off the third switch and the fourth switch when the vehicle is changed from the standby mode or the start mode to the driving mode; includes

Also, in step (b), the first load group receives power from the main battery through the parasitic diode of the second switch, and the second load group includes the parasitic diode of the second switch and the first switch Power is supplied from the main battery through the parasitic diode of the fourth switch and power is supplied from the auxiliary battery through the third switch, and the third load group is supplied from the auxiliary battery through the parasitic diode of the fourth switch. power can be supplied.

In addition, in step (b), when the startup assist mode is entered, the switching control unit turns on the bidirectional DC/DC converter connected between the main battery and the auxiliary battery from the auxiliary battery toward the main battery, Charging power may be supplied from the auxiliary battery to the main battery side.

Also, in step (c), the first load group receives power from the main battery through the parasitic diode of the second switch, and the second load group includes the parasitic diode of the second switch and the first switch Power may be supplied from the main battery through , and the third load group may receive power from the auxiliary battery through the parasitic diode of the fourth switch.

In addition, in step (c), when the voltage of the main battery is maintained below the first threshold for a predetermined time, the switching control unit turns off the first switch and the second switch according to the control signal input from the ICU, By turning on the third and fourth switches, power is supplied from the main battery to the first load group through the parasitic diode of the second switch, and at the same time, the auxiliary through the parasitic diode of the fourth switch and the third switch Power is supplied from a battery to the second load group, and when the voltage of the main battery is maintained above a second threshold for a predetermined time, the switching control unit may control the first switch and the second load group according to a control signal input from the ICU. By turning on a switch and turning off the third switch and the fourth switch, only the main battery may supply power to the second load group.

In addition, in the vehicle power multiplexing control method, (d) while the vehicle is driving in the intermediate mode, an ISG (Idle Stop & Go) start-off signal is input to the switching control unit, or a communication abnormality detection signal (Stand Alone) is the when input to a switching control unit, the switching control unit turning on the first switch and the third switch, and turning off the second switch and the fourth switch; and (e) when an ISG (Idle Stop & Go) start-on signal is input from the ICU to the switching control unit or a communication abnormality detection signal (Stand Alone) is no longer input, it returns to the driving mode and returns to the first switch and turning on the second switch and turning off the third switch and the fourth switch.

Also, in step (d), the first load group receives power from the main battery through the parasitic diode of the second switch, and the second load group includes the parasitic diode of the second switch and the first switch Power is supplied from the main battery through the parasitic diode of the fourth switch and power is supplied from the auxiliary battery through the third switch, and the third load group is supplied from the auxiliary battery through the parasitic diode of the fourth switch. power can be supplied.

In addition, the plurality of load groups further include the fourth load group, and while steps (a) to (c) are performed, the fourth load group uses a diode in which the fourth load group direction is forward. Through the direct connection to the main battery and the auxiliary battery, respectively, it is possible to always receive power from the main battery and the auxiliary battery.

The present invention installs a main battery and an auxiliary battery, classifies the loads in the vehicle into a plurality of groups, and then controls on/off control of a plurality of switches inside the vehicle power multiplexing control device according to the preferred embodiment of the present invention. By allowing the group to always receive power from at least one of the main battery and the auxiliary battery, it is possible to stably supply power to loads in the vehicle.

1A and 1B are diagrams illustrating a configuration diagram of a power supply of a vehicle according to the related art.
2 is a diagram illustrating a configuration diagram of a power supply of a vehicle according to a preferred embodiment of the present invention.
3 is a diagram illustrating a detailed configuration of an apparatus for controlling vehicle power multiplexing according to a preferred embodiment of the present invention.
4 is a diagram illustrating a detailed circuit configuration of an apparatus for controlling vehicle power multiplexing according to a preferred embodiment of the present invention.
5 is a view for explaining a vehicle power multiplexing method according to a state transition of the vehicle power multiplexing control apparatus according to a preferred embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

2 is a diagram illustrating a configuration diagram of a vehicle power supply according to a preferred embodiment of the present invention, and FIG. 3 is a diagram illustrating a detailed configuration of a vehicle power multiplexing control apparatus 300 according to a preferred embodiment of the present invention. , FIG. 4 is a diagram showing a detailed circuit diagram of a vehicle power multiplexing control apparatus 300 according to a preferred embodiment of the present invention.

2 to 4 , the vehicle power multiplexing control apparatus 300 according to a preferred embodiment of the present invention includes a plurality of loads in a vehicle (first load group L1 to fourth load group L4). connected to and connected to the main battery 100 and the auxiliary battery 200, the power supplied from the main battery 100 and the auxiliary battery 200 to a plurality of loads (the first load group L1 to the fourth load group (L4)). In addition, the vehicle power multiplexing control apparatus 300 of the present invention may provide power input from the solar roof 400 to a plurality of loads.

The vehicle power multiplexing control apparatus 300 of the present invention includes a switching module 310 , a DC/DC converter 320 , and a plurality of diodes D1 and D2 . In addition, the switching module 310 includes a plurality of switches SW1 to SW4 and a switching controller 311 for on/off controlling the switches SW1 to SW4.

The switching module 310 selectively selects the switches SW1 to SW4 according to the state of the vehicle so that power can always be supplied to the plurality of load groups L1 to L4 in all states of the vehicle except the parking state. It turns on/off and controls the bidirectional DC/DC converter 320 .

In addition, the switching module 310 is connected between the plurality of load groups L1 to L4 and the main battery 100 and the auxiliary battery 200, to a control signal input from an ICU (Integrated Central Control Unit). Accordingly, by turning on/off the switches SW1 to SW4 included therein, power is supplied from the main battery 100 or the auxiliary battery 200 to the plurality of load groups L1 to L4 .

The bidirectional DC/DC converter 320 is connected in parallel with the switching module 310 between the main battery 100 and the auxiliary battery 200 and receives a control signal input from the switching module 310 . Accordingly, it is controlled to charge the auxiliary battery 200 using the power of the main battery 100 or charge the main battery 100 using the power of the auxiliary battery 200 .

On the other hand, in the vehicle of the present invention, a photovoltaic unit (Solar Roof) 400 that is installed in the vehicle to convert sunlight into electric power and output a DC voltage, and the DC voltage output from the solar power unit 400 A voltage converter for converting the to a voltage level suitable for charging the main battery 100 or a voltage level suitable for supplying power to the plurality of loads to output to the main battery 100 or the plurality of loads ( SDC: Solar DC/DC Converter) 500 may be installed.

In this case, the vehicle power multiplexing control apparatus 300 according to the preferred embodiment of the present invention receives power from the voltage converter 500 and charges the main battery 100 as shown in FIGS. 3 and 4 . Alternatively, power can be supplied to multiple loads.

3 and 4, the detailed configuration of the vehicle power multiplexing control apparatus 300 according to the preferred embodiment of the present invention will be described. In the preferred embodiment of the present invention, a plurality of loads are divided into four load groups (the 1 to 4 load groups (L1 to L4)), and the switching module 310 of the vehicle power multiplexing device uses the first to fourth switches SW1 to SW4 and the control signal input from the ICU, and a switching control unit 311 for controlling on/off of the first to fourth switches SW1 to SW4.

3 and 4 , the first switch SW1 and the third switch SW3 are connected in parallel to the second load group L2, and the second switch SW2 is the first switch SW1 ) and the main battery 100 , and a fourth switch SW4 is connected between the third switch SW3 and the auxiliary battery 200 .

In this case, the first to fourth switches SW1 to SW4 are implemented as FETs including parasitic diodes, and the forward directions of the parasitic diodes are opposite to each other in the first switch SW1 and the second switch SW2 . The third switch SW3 and the fourth switch SW4 are connected in a forward direction of a parasitic diode opposite to each other. In addition, in the second switch SW2 and the fourth switch SW4, the forward direction of the parasitic diode is toward the second load group L2, and accordingly, the first switch SW1 and the third switch SW1 In SW3), the forward directions of the parasitic diodes are directed toward the main battery 100 and the auxiliary battery 200, respectively.

In addition, the first load group L1 is connected between the first switch SW1 and the second switch SW2, and is always supplied from the main battery 100 through a parasitic diode of the second switch SW2. receive power. In addition, the third load group L3 is connected between the third switch SW3 and the fourth switch SW4 and is always supplied from the auxiliary battery 200 through the parasitic diode of the fourth switch SW4. receive power.

On the other hand, the fourth load group L4 is connected to the main battery 100 through a diode D1 in the forward direction of the fourth load group L4 and is connected to the auxiliary battery 200 through a diode D2, the main battery Power is always supplied from 100 and the auxiliary battery 200 .

Meanwhile, one end of the bidirectional DC/DC converter 320 is connected to the second switch SW2 and the main battery 100 , and the other end of the bidirectional DC/DC converter 320 is the fourth switch SW4 . ) and connected to the auxiliary battery 200 .

In addition, the vehicle power multiplexing control apparatus 300 of the present invention communicates with ICU, BMS (Battery Management System), IBS (Intelligent Battery Sensor), etc. through various vehicle communication methods (CAN, LIN, etc.) to switch The information received from them is reflected in the on/off control of SW1 to SW4).

As described above, in a preferred embodiment of the present invention, a plurality of loads in the vehicle are classified into four load groups (the first load group L1 to the fourth load group L4).

The first load group L1 is a load mainly related to steering and braking devices, and is always supplied with power by the main battery 100 irrespective of the on/off operation of the switches SW1 to SW4 . The first load group L1 may include MDPS, C/FAN, EOP, ESC, RR HTD, EPB, F/PUMP, HORN, P/WDW MTR, S/HEATER, P/SEAT, SUNROOF, and the like.

The second load group L2 is a load mainly related to lamp devices, and receives power from at least one of the main battery 100 and the auxiliary battery 200 according to the on/off operation of the switches SW1 to SW4. are supplied The second load group (L2) includes HEAD LP, STOP LP, B/UP LP, STR'G HTD, MOOD LP, GLOVE LP, OHC LP, T_ROOM LP, S/VISOR LP, WPC, MFSW, RADAR, AMP, SCU. , BLOWER, WIPER, etc. may be included.

The third load group L3 is a load related to devices that mainly consume power during parking, and power is always supplied by the auxiliary battery 200 regardless of the on/off operation of the switches SW1 to SW4. receive The third load group L3 may include a DVRS (black box).

The fourth load group L4 is a load related to a wake-up device and a vehicle safety device, and regardless of the on/off operation of the switches SW1 to SW4 through the diodes D1 and D2, the main battery ( 100) and the auxiliary battery 200 are always supplied with power. The fourth load group L4 may include DOOR LOCK, IBU, IMS, E-CALL, CLUSTER, HUD, DAU, DATC, and the like.

Hereinafter, an operation of the vehicle power multiplexing control apparatus 300 and a vehicle power multiplexing control method performed by the vehicle power multiplexing control apparatus 300 according to a preferred embodiment of the present invention will be described with further reference to FIG. 5 . However, a shaded switch or DC/DC converter 320 indicates an off state, and a non-shaded switch or DC/DC converter 320 indicates an on state.

First, in the parking mode in which the vehicle is parked, the switching control unit 311 maintains all the switches SW1 to SW4 and the DC/DC converter 320 in an OFF state, and the first load group L1 operates the second switch Power is supplied from the main battery 100 through the parasitic diode of SW2 , and the third load group L3 receives power from the auxiliary battery 200 through the parasitic diode of the fourth switch SW4 .

After that, when the parking mode is changed to the standby mode or the start mode, the switching control unit 311 turns on the first switch SW1 and the third switch SW3, and the second switch SW2 and the fourth switch SW4 ) turns off. Then, the first load group L1 receives power from the main battery 100 through the parasitic diode of the second switch SW2 .

The second load group L2 supplies power from the main battery 100 through the parasitic diode of the second switch SW2 and the first switch SW1, and at the same time, the parasitic diode of the fourth switch SW4 and the third switch Power is supplied from the auxiliary battery 200 through SW3.

The third load group L3 receives power from the auxiliary battery 200 through the parasitic diode of the fourth switch SW4. In this way, all of the first load group L1 to the fourth load group L4 are stably supplied with power from the main battery 100 and the auxiliary battery 200 . Meanwhile, the DC/DC converter 320 maintains an off state.

When proceeding from the standby mode or the start mode to the driving mode, the switching control unit 311 turns on the first switch SW1 and the second switch SW2, and the third switch SW3 and the fourth switch SW4 turns off make it Then, the first load group L1 is supplied with power from the main battery 100 through the parasitic diode of the second switch SW2, and the second load group L2 is the parasitic of the second switch SW2. Power is supplied from the main battery 100 through the diode and the first switch SW1, and the third load group L3 supplies power from the auxiliary battery 200 through the parasitic diode of the fourth switch SW4. receive Also, the switching controller 311 turns on the DC/DC converter 320 to charge the auxiliary battery 200 with the power of the main battery 100 .

On the other hand, when the voltage of the main battery 100 is low in the process of receiving the start-on signal from the ICU and proceeding to the driving mode, the switching control unit 311 proceeds to the start-up assist mode, and from the auxiliary battery 200 to the main The bidirectional DC/DC converter 320 is turned on in the direction of the battery 100 to supply charging power from the auxiliary battery 200 to the main battery 100 to proceed to the driving mode.

On the other hand, when the voltage of the main battery 100 is maintained for a predetermined time (200 ms) below the first threshold value (12V) during the driving mode, the switching control unit 311 controls the first switch SW1 according to the control signal input from the ICU. and the second switch SW2 is turned off, and the third switch SW3 and the fourth switch SW4 are turned on. Then, while supplying power from the main battery 100 to the first load group L1 through the parasitic diode of the second switch SW2, the parasitic diode of the fourth switch SW4 and the third switch ( Power is supplied from the auxiliary battery 200 to the second load group L2 through SW3). In this case, the main battery 100 supplies power only to the first load group L1 and does not supply power to the second load group L2, so that the main battery 100 is gradually charged over time.

After that, when the voltage of the main battery 100 is maintained for a predetermined time (200ms) above the second threshold (12.5V), the switching control unit 311 controls the first switch SW1 and The second switch SW2 is turned on, and the third switch SW3 and the fourth switch SW4 are turned off, so that the main battery 100 is restored to the second load group L2 together with the existing first load group L1. ) to supply power. In this case, the auxiliary battery 200 that has been discharged by supplying power to the second load group L2 is charged by receiving charging power from the main battery 100 through the DC/DC converter 320 .

Meanwhile, in the driving mode, when an idle stop & go (ISG) start-off signal or a communication abnormality detection signal (Stand Alone) is input from the ICU to the switching control unit 311 , the switching control unit 311 controls the first switch SW1 and the third switch SW3 are turned on, and the second switch SW2 and the fourth switch SW4 are turned off.

Then, the first load group L1 receives power from the main battery 100 through the parasitic diode of the second switch SW2. The second load group L2 receives power from the main battery 100 through the parasitic diode of the second switch SW2 and the first switch SW1, and at the same time, the parasitic diode of the fourth switch SW4. and power is supplied from the auxiliary battery 200 through the third switch SW3. The third load group L3 receives power from the auxiliary battery 200 through the parasitic diode of the fourth switch SW4.

After that, when the ISG (Idle Stop & Go) start-on signal is input from the ICU to the switching controller 311 or the communication abnormality detection signal (Stand Alone) is no longer input, it returns to the driving mode, and the switching controller Reference numeral 311 turns on the first switch SW1 and the second switch SW2 , and turns off the third switch SW3 and the fourth switch SW4 . Then, it proceeds to the previous driving mode.

As described above, according to the vehicle power multiplexing control apparatus 300 and method according to the preferred embodiment of the present invention, all loads in the vehicle can always receive power stably.

So far, the present invention has been looked at with respect to preferred embodiments thereof. Those of ordinary skill in the art to which the present invention pertains will understand that the present invention can be implemented in a modified form without departing from the essential characteristics of the present invention. Therefore, the disclosed embodiments are to be considered in an illustrative rather than a restrictive sense. The scope of the present invention is indicated in the claims rather than the foregoing description, and all differences within the scope equivalent thereto should be construed as being included in the present invention.

100: main battery
200: auxiliary battery
300: vehicle power multiplexing control device
310: switching module
311: switching control unit
SW1: first switch SW2: second switch
SW3: third switch SW4: fourth switch
320: DC/DC converter
400: Solar Roof
500: voltage converter
L1: first load group L2: second load group
L3: Third load group L4: Fourth load group
D1, D2: diode

Claims (24)

delete delete delete A vehicle power multiplexing control device connected to a main battery and an auxiliary battery installed in a vehicle, connected to a plurality of loads in the vehicle, and supplying power of the main battery and the auxiliary battery to loads, comprising:
It is connected between a plurality of load groups and the main battery and the auxiliary battery to turn on/off switches included therein according to a control signal input from an integrated central control unit (ICU), so that the main battery or the auxiliary battery a switching module for supplying power from the plurality of load groups; and
a bidirectional DC/DC converter connected between the main battery and the auxiliary battery in parallel with the switching module and controlled according to a control signal input from the switching module;
The switching module selectively turns on/off the switches according to the state of the vehicle so that power is always supplied to the plurality of load groups in all states of the vehicle except for the parking state, and operates the bidirectional DC/DC converter control,
The plurality of load groups includes a first load group to a third load group,
The switching module is
a first switch and a third switch connected in parallel to the second load group;
a second switch connected between the first switch and the main battery;
a fourth switch connected between the third switch and the auxiliary battery; and
In accordance with the control signal input from the ICU, a switching control unit for controlling the on / off of the first switch to the fourth switch; includes,
The first switch and the second switch are FETs in which the forward directions of the parasitic diodes are opposite to each other,
The third switch and the fourth switch are FETs in which the forward directions of the parasitic diodes are opposite to each other. 5. The method of claim 4,
The second switch and the fourth switch are
The vehicle power multiplexing control device, characterized in that the forward direction of the parasitic diode is toward the second load group. 6. The method of claim 5,
One end of the bidirectional DC/DC converter is connected to the second switch and the main battery, and the other end of the bidirectional DC/DC converter is connected to the fourth switch and the auxiliary battery. Device. 6. The method of claim 5,
and the first load group is connected between the first switch and the second switch, and is always supplied with power from the main battery. 6. The method of claim 5,
and the third load group is connected between the third switch and the fourth switch, and is always supplied with power from the auxiliary battery. 6. The method of claim 5,
The plurality of load groups further include the fourth load group,
The fourth load group is directly connected to the main battery and the auxiliary battery through a diode with a forward direction of the fourth load group, and power is always supplied from the main battery and the auxiliary battery. controller. 6. The method of claim 5,
In the parking mode, the switching control unit turns off the first switch to the fourth switch,
The first load group receives power from the main battery through the parasitic diode of the second switch,
The third load group receives power from an auxiliary battery through a parasitic diode of the fourth switch. 6. The method of claim 5,
In standby or startup mode,
The switching control unit turns on the first switch and the third switch, and turns off the second switch and the fourth switch,
The first load group receives power from the main battery through the parasitic diode of the second switch,
The second load group receives power from the main battery through the parasitic diode of the second switch and the first switch, and receives power from the auxiliary battery through the parasitic diode of the fourth switch and the third switch,
The third load group receives power from an auxiliary battery through a parasitic diode of the fourth switch. 12. The method of claim 11, wherein in the start assist mode
The switching control unit turns on the DC/DC converter from the auxiliary battery to the main battery to supply charging power from the auxiliary battery to the main battery. 6. The method of claim 5,
In driving mode,
The switching control unit turns on the first switch and the second switch, and turns off the third switch and the fourth switch,
The first load group receives power from the main battery through the parasitic diode of the second switch,
The second load group receives power from the main battery through the parasitic diode of the second switch and the first switch,
The third load group receives power from an auxiliary battery through a parasitic diode of the fourth switch. 14. The method of claim 13,
When the voltage of the main battery is maintained below the first threshold for a predetermined time,
The switching control unit turns off the first switch and the second switch according to a control signal input from the ICU, and turns on the third switch and the fourth switch,
While supplying power from the main battery to the first load group through the parasitic diode of the second switch, power is supplied from the auxiliary battery to the second load group through the parasitic diode of the fourth switch and the third switch supply,
When the voltage of the main battery is maintained above the second threshold for a predetermined time,
The switching control unit turns on the first switch and the second switch according to a control signal input from the ICU, and turns off the third switch and the fourth switch, so that only the main battery supplies power to the second load group Vehicle power multiplexing control device, characterized in that the supply. 14. The method of claim 13,
In the driving mode, when an ISG (Idle Stop & Go) start-off signal or a communication abnormality detection signal (Stand Alone) is input from the ICU to the switching control unit,
The switching control unit turns on the first switch and the third switch, and turns off the second switch and the fourth switch,
The first load group receives power from the main battery through the parasitic diode of the second switch,
The second load group receives power from the main battery through the parasitic diode of the second switch and the first switch, and receives power from the auxiliary battery through the parasitic diode of the fourth switch and the third switch,
The third load group receives power from the auxiliary battery through the parasitic diode of the fourth switch,
When the ISG (Idle Stop & Go) start-on signal is input from the ICU to the switching control unit or the communication abnormality detection signal (Stand Alone) is no longer input,
and returning to the driving mode, turning on the first switch and the second switch, and turning off the third switch and the fourth switch. 6. The method of claim 5,
a solar power generation unit installed in a vehicle to convert sunlight into electric power and output a DC voltage; and
The DC voltage output from the photovoltaic unit is converted into a voltage level suitable for charging the main battery or a voltage level suitable for supplying power to the plurality of load groups to the main battery or the plurality of load groups. Vehicle power multiplexing control device, characterized in that it further comprises a voltage converter to output.
A first switch and a third switch connected in parallel to a second load group, a second switch connected between the first switch and a main battery, a fourth switch connected between the third switch and an auxiliary battery, and an ICU ( and a switching controller for controlling on/off of the first to fourth switches according to a control signal input from an integrated central control unit), wherein the second switch and the fourth switch have a forward direction of the parasitic diode. the direction toward the second load group, the first switch and the second switch are FETs connected in the reverse direction of the parasitic diode, and the second switch and the fourth switch are FETs connected in the forward direction of the parasitic diode in the opposite direction and a first load group is connected between the first switch and the second switch, and a third load group is a vehicle power multiplexing performed in a vehicle power multiplexing control device connected between the third switch and the fourth switch. As a method,
(a) maintaining all switches in the off state in the parking mode of the vehicle;
(b) turning on the first switch and the third switch and turning off the second switch and the fourth switch when the vehicle is changed to the standby mode or the start mode; and
(c) when the vehicle is changed from the standby mode or the start mode to the driving mode, the switching control unit turns on the first switch and the second switch, and turns off the third switch and the fourth switch; Vehicle power multiplexing control method comprising the. The method of claim 17, wherein in step (b),
The first load group receives power from the main battery through the parasitic diode of the second switch,
The second load group receives power from the main battery through the parasitic diode of the second switch and the first switch, and receives power from the auxiliary battery through the parasitic diode of the fourth switch and the third switch,
The third load group receives power from an auxiliary battery through a parasitic diode of the fourth switch. The method of claim 18, wherein in step (b),
When entering the start-up assist mode, the switching control unit
Vehicle power multiplexing control, characterized in that the bidirectional DC/DC converter connected between the main battery and the auxiliary battery is turned on from the auxiliary battery in the direction of the main battery to supply charging power from the auxiliary battery to the main battery side Way. The method of claim 17, wherein in step (c),
The first load group receives power from the main battery through the parasitic diode of the second switch,
The second load group receives power from the main battery through the parasitic diode of the second switch and the first switch,
The third load group receives power from an auxiliary battery through a parasitic diode of the fourth switch. The method of claim 20, wherein in step (c)
When the voltage of the main battery is maintained below the first threshold for a predetermined time,
The switching control unit turns off the first switch and the second switch according to a control signal input from the ICU, and turns on the third switch and the fourth switch,
While supplying power from the main battery to the first load group through the parasitic diode of the second switch, power is supplied from the auxiliary battery to the second load group through the parasitic diode of the fourth switch and the third switch supply,
When the voltage of the main battery is maintained above the second threshold for a predetermined time,
The switching control unit turns on the first switch and the second switch according to a control signal input from the ICU, and turns off the third switch and the fourth switch, so that only the main battery supplies power to the second load group Vehicle power multiplexing control method, characterized in that supply. 18. The method of claim 17,
(d) while the vehicle is driving in the driving mode, when an ISG (Idle Stop & Go) start-off signal is input to the switching controller or a communication abnormality detection signal (Stand Alone) is input to the switching controller, the switching controller is turning on the first switch and the third switch, and turning off the second switch and the fourth switch; and
(e) when the ISG (Idle Stop & Go) start-on signal is input from the ICU to the switching control unit or the communication abnormality detection signal (Stand Alone) is no longer input, it returns to the driving mode and returns to the first switch and The method of claim 1, further comprising turning on the second switch and turning off the third switch and the fourth switch. 23. The method of claim 22, wherein in step (d),
The first load group receives power from the main battery through the parasitic diode of the second switch,
The second load group receives power from the main battery through the parasitic diode of the second switch and the first switch, and receives power from the auxiliary battery through the parasitic diode of the fourth switch and the third switch,
The third load group receives power from an auxiliary battery through a parasitic diode of the fourth switch. 18. The method of claim 17,
The plurality of load groups further include the fourth load group,
While steps (a) to (c) are performed,
Vehicle power multiplexing, characterized in that the fourth load group is directly connected to the main battery and the auxiliary battery through a diode with a forward direction of the fourth load group, and is always supplied with power from the main battery and the auxiliary battery control method.

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