KR20220077350A - Apparatus for distributing power employing system of high voltage relay multi controlling in electric vehicle - Google Patents

Abstract

The embodiment relates to a power distribution device to which a high voltage relay multiple control system of an electric vehicle is applied.
Specifically, such a power distribution device assists the vehicle-side main controller to directly control the high voltage relay inside the power distribution device through hard-wire I/O (ie, “direct control assistance”), and this direct control In addition, high-voltage relay multi-control is performed by integrating the method (that is, “direct/indirect control assistance”) to assist the use of indirect control using the high-voltage relay control command of the vehicle-side main controller through internal communication within the vehicle. do.
For reference, the direct control and the indirect control control power distribution in various ways by performing the control in the vehicle-side main controller when such power distribution is performed in the conventional manner. And, this high voltage relay multiple control comes out in addition to this control.
And, at this time, when this power distribution device supports direct control, the internal controller monitors the control voltage through hard-wire I/O, and has a function to momentarily delay blocking the relay when an abnormality occurs. This is achieved by breaking the momentary interruption of the relay.
In addition, when this power distribution device assists with direct/indirect control, the internal controller compares the direct control state of the vehicle-side main controller with the indirect control command, and when one control is wrong, the vehicle-side main controller has a problem. It is determined that it has occurred and has a function of momentarily delaying the relay cutoff, so it is characterized by canceling the instantaneous cutoff of the relay.
Therefore, when the electric vehicle power is distributed through this, an error occurs in the vehicle or the voltage drop of the relay power is caused by the surrounding environment, resulting in chattering at the relay contacts. Avoid damage to high voltage components.
Or, furthermore, the vehicle is prevented from stopping abnormally due to the power being cut off to the driving device due to unintentional relay operation stop.

Description

Apparatus for distributing power employing system of high voltage relay multi controlling in electric vehicle

The content disclosed in this specification relates to the field of electric power distribution device for electric vehicles, and more particularly, when the electric vehicle is driven or charged, it controls the distribution of power from the battery and the charging unit to smoothly provide driving and charging services, etc. It's about technology.

Unless otherwise indicated herein, the material described in this section is not prior art to the claims of this application, and inclusion in this section is not an admission that it is prior art.

In recent years, as the spread of vehicles increases, the problem of environmental pollution due to automobile fumes is emerging, and in order to solve these problems in that energy problems are occurring, research on electric vehicles is actively carried out. have.

Such an electric vehicle mainly uses a battery as a power source to obtain power by driving an AC or DC motor, and can be largely divided into a battery-only electric vehicle and a hybrid electric vehicle.

In addition, the battery-only electric vehicle drives the electric motor using the power of the battery and recharges it when the power is exhausted, and the hybrid electric vehicle generates electricity through the operation of the engine to charge the battery, , to make the car move.

In this regard, in the case of a commercial electric vehicle, since the amount of power required is larger than that of a general electric vehicle, a plurality of battery packs including a plurality of battery modules are required to meet the power demand from the battery module having the current energy density. .

And, in order to secure convenience and safety in use, the commercial electric vehicle is provided with a power distribution unit (PDU) to collect power applied from a plurality of battery packs and apply it to a driving motor and each electric component.

For example, such a power distribution device includes a plurality of connection terminals electrically connected to power distribution control target components such as a battery or an internal controller, and circuit components such as a fuse and a relay.

However, when the power of the electric vehicle is distributed in this way, an abnormality occurs in the vehicle or a chattering phenomenon occurs at the relay contact point due to voltage drop of the relay power due to the surrounding environment, so that an instantaneous boost occurs, and the Damage to high voltage components occurs.

The prior art literature in this background is to the extent that the following patent literature appears.

(Patent Document 0001) KR101949099 B1

For reference, the prior art relates to a power distribution device for an electric vehicle, and is capable of suppressing damage or damage through individual control of a power distribution control target component.

The disclosed content is that, during power distribution of the electric vehicle, an abnormality occurs in the vehicle or a voltage drop of the relay power source is caused by the surrounding environment, resulting in chattering at the relay contact point. An object of the present invention is to provide a power distribution device to which a high voltage relay multi-control system of an electric vehicle is applied to prevent damage to the electric vehicle.

The power distribution device to which the high voltage relay multi-control system of the electric vehicle according to the embodiment is applied,

A method of assisting the vehicle-side main controller to directly control the high-voltage relay inside the power distribution device through hard-wired I/O (hereinafter “direct control assistance”), and in addition to this direct control, the vehicle-side through communication within the vehicle High voltage relay multi-control is performed by integrating the method of assisting the use of indirect control using the high voltage relay control command of the main controller (hereinafter “direct/indirect control assistance”).

For reference, the direct control and the indirect control control power distribution in various ways by performing the control in the vehicle-side main controller when such power distribution is performed in the conventional manner. And, this high voltage relay multiple control comes out in addition to this control.

And, in this case, when this power distribution device assists with direct control, the internal controller monitors the control voltage through hard-wire I/O, and has a function of momentarily delaying the relay disconnection when an abnormality occurs. This is achieved by breaking the momentary blocking of the relay.

In addition, when this power distribution device assists with direct/indirect control, the internal controller compares the direct control state of the vehicle-side main controller with the indirect control command. It is determined that it has occurred and has a function of momentarily delaying the relay cutoff, so it is characterized by canceling the instantaneous cutoff of the relay.

According to the embodiments, when the electric vehicle power is distributed, an abnormality occurs in the vehicle or a voltage drop of the relay power source is caused by the surrounding environment, and a chattering phenomenon occurs at the relay contact point. Avoid damage to internal or high voltage components.

Or, furthermore, the vehicle is prevented from stopping abnormally due to the power being cut off to the driving device due to unintentional relay operation stop.

1 is a diagram for conceptually explaining a power distribution device to which a high voltage relay multiple control system of an electric vehicle is applied according to an embodiment;
FIG. 2 is a view showing an overall system to which a power distribution device to which a high voltage relay multiple control system of an electric vehicle is applied according to an embodiment is applied; FIG.
3 is a block diagram illustrating a configuration of a power distribution device to which a high voltage relay multiple control system of an electric vehicle is applied according to an exemplary embodiment;
4 is a flowchart sequentially illustrating an operation of a power distribution device to which a high voltage relay multiple control system of an electric vehicle is applied according to an exemplary embodiment;

1 is a diagram for conceptually explaining a power distribution device to which a high voltage relay multiple control system of an electric vehicle according to an embodiment is applied.

As shown in FIG. 1 , when the power distribution device 100 of an embodiment distributes power to several driving devices of an electric vehicle, power is distributed from the high voltage relay multiple control system of the embodiment, thereby reducing chattering and Avoid damage to its internal or high voltage components.

In this case, the high voltage relay multiple control system performs the high voltage relay multiple control by integrally performing the above-described direct control assistance and direct/indirect control assistance.

And, in this case, when the multi-control system assists with direct control, the internal controller monitors the control voltage through the hard-wire I/O, and has a function of momentarily delaying the relay disconnection when an abnormality occurs, This is achieved by breaking the momentary blocking of the relay.

In addition, this multi-control system has a function of momentarily delaying the relay disconnection when one control is wrong through the mutual comparison between direct control and indirect control in the internal controller when supporting direct/indirect control. This is achieved by breaking the momentary blockage of

Therefore, when this power distribution device distributes power to the driving device of the electric vehicle, etc., the power is distributed from the high voltage relay multiple control system, so chattering phenomenon is prevented and the power distribution becomes highly stable, and the abnormality of the vehicle Stop protection is achieved.

As part of this advantage, when the electric vehicle power is distributed, an error occurs in the vehicle or the voltage drop of the relay power source is caused by the surrounding environment, which causes chattering at the relay contacts. Avoid damage to internal or high voltage components.

On the other hand, in addition to this as a different form, the power distribution device 100 of an embodiment includes an insulation monitoring device for monitoring a short circuit by monitoring the resistance value between the high voltage battery (high voltage circuit) and the vehicle body, By notifying the main controller of the vehicle side in case of a short circuit, it has a function to prevent electric accidents and damage to parts.

FIG. 2 is a view showing an overall system to which a power distribution device to which a high voltage relay multiple control system of an electric vehicle is applied according to an embodiment is applied.

As shown in Fig. 2, the system of one embodiment is a power distribution device (100-1, 100-2, .. ) and a VCU 200 that manages such a power distribution operation.

In this case, the multi-control system receives a CAN communication-based PRA (Power Relay Assy) control command from the VCU 200 to control the intermittent operation of the relay, and the vehicle side main The controller directly controls the intermittent operation of the relay by hard-wired I/O.

And, in addition to this, according to an embodiment, the multi-control system performs the aforementioned direct control assistance and direct/indirect control assistance.

At this time, when this direct control assistance becomes direct control, the internal controller monitors the control voltage through the hard-wire I/O, and has a function of momentarily delaying the relay disconnection when an abnormality occurs. This is achieved by breaking the momentary blockade.

In addition, when direct control and indirect control are used together, the direct/indirect control assistant monitors the control voltage through hard-wire I/O from the internal controller and checks the PRA control status through internal communication of the vehicle for mutual comparison. Since it has a function of momentarily delaying the relay disconnection when an abnormality occurs, it is achieved by canceling the instantaneous disconnection of the relay.

The power distribution devices 100-1, 100-2, ... are installed by a plurality of different driving devices or electronic parts groups in the electric vehicle according to a user's desire, and a high voltage relay multiple control system with the VCU 200 By controlling the power supply and distribution of each group from In this case, the driving part group groups one, for example, an air conditioner, a heater, a power steering, an inverter motor, and a DC-DC converter as the same group. At this time, the power distribution devices 100-1, 100-2, ... ) are electrically connected for each type of the same drive device so that power is distributed collectively between the same drive device types (eg, air conditioner and heater). do. And, in addition to this, the power distribution device (100-1, 100-2, ...) receives the CAN communication-based PRA control command from the VCU (200) when the power is distributed in this way according to an embodiment, and the relay An indirect control method to control the intermittent operation is implemented. In addition, in this case, the power distribution devices 100-1, 100-2, ... , the VCU 200 directly controls the intermittent operation of the relay by hard-wire I/O is implemented. At this time, when the high voltage relay of the power distribution device 100 is directly controlled, the power distribution device 100-1, 100-2, ... When a small instantaneous voltage drop is generated compared to the preset reference control voltage, it has a function of temporarily delaying the relay shutoff by supplementing it, so it is achieved by eliminating the instantaneous interruption of the relay. In addition, when the direct control and the indirect control are used together, the power distribution device 100 compares the control voltage through the hard-wire I/O with the reference control voltage in the internal controller to generate an instantaneous voltage drop. When the direct control state contradicts the PRA control command of the vehicle internal communication, it has the function of temporarily delaying the relay disconnection by supplementing the control power, so it is achieved by resolving the instantaneous disconnection of the relay. Therefore, when this power distribution device distributes power to the driving device of the electric vehicle, etc., the power is distributed from the high voltage relay multiple control system, so chattering phenomenon is prevented and the power distribution becomes highly stable, and the abnormality of the vehicle Stop protection is achieved.

The VCU 200 as a whole manages the power distribution operation of these power distribution devices 100-1, 100-2, ... Indirect control of the power distribution devices 100-1, 100-2, ... is managed by providing a PRA control command for each different power event. For reference, the power event includes, for example, vehicle key (key) information for determining the driver's will to drive the vehicle, sensor signals such as the accelerator pedal, and various information from the engine management system and the transmission control unit, such as a charging gun signal. received, and generated according to the result of calculating vehicle driving or charging information. And, in addition, the VCU 200 is hard-wired according to the above-described high voltage relay multiple control system. via I/O It also directly controls the intermittent operation of the relay.

3 is a block diagram illustrating a configuration of a power distribution device to which a high voltage relay multiple control system of an electric vehicle is applied according to an exemplary embodiment.

As shown in FIG. 3 , the power distribution device 100 according to an embodiment includes the main interface units 101-1, 101-2, ... , which receive the main power of the battery and the sub power of the charging unit, and the sub-interface unit. (102-1, ... ), sub relays (103-1, ... ) and main relays (104-1, 104-2, ... ) that intermittently intermittently sub-power and main power, and VCU (200 ) and a controller 105 for controlling each intermittent operation according to whether an event occurs or not.

And, in this case, the power distribution device 100 of an embodiment implements a high voltage relay multiple control system by further performing the above-described direct control assistance and direct/indirect control assistance in addition to the existing direct control and indirect control.

Additionally, the power distribution device 100 includes an insulation monitoring device 106 that monitors a leakage current by measuring a resistance value between the high voltage battery (high voltage circuit) and the vehicle body, and the controller 105 monitors this information. Thus, it has a function of warning the VCU 200 through internal communication of the vehicle.

The main interface units 101-1, 101-2, ... are installed for a plurality of different batteries, and are main power from each battery when the electric vehicle is running, that is, power for driving each driving device in the electric vehicle. is supplied by default.

The sub-interface units 102-1, ... are installed for a plurality of different charging units, and when the electric vehicle is driven or charged, sub-power is additionally supplied from each charging unit to supply each battery in the electric vehicle. Used for charging or as a separate power source. This sub-power is selected and supplied by the VCU 200 or the controller 105 as a corresponding driving device when accelerating or charging the electric vehicle.

A plurality of the sub relays 103-1, ... are installed in response to the sub power of each charging unit being supplied, and sub power to the driving device etc. by the high voltage relay multiple control system of the controller 200 crackdown is made

A plurality of the main relays 104-1, 104-2, ... are installed in response to the main power of each battery being supplied, and the driving device is similarly driven by the high voltage relay multiple control system of the controller 105. The main power supply to the furnace is cut off.

The controller 105 basically performs the intermittent operation of the sub relays 103-1, ... , and the main relays 104-1, 104- by the vehicle-side main controller when power is distributed as before. 2, . And, in this case, according to an embodiment, the controller 105 can additionally perform both the direct control assistance and the direct/indirect control assistance described above, and the cooking selection is also possible according to the selection, so that a high voltage relay multiple control system is implemented. . Specifically, when power is distributed, the controller 105 transmits a PRA control command for each different power event preset in relation to power distribution based on the control format from the pre-registered VCU 200 through in-vehicle communication. Provided, the intermittent operation of the sub relay and the main relay is indirectly controlled, and the PRA control state is fed back. In addition, in this case, the main relays 104-1, 104-2, ... and the sub relays 103-1, ... are hard to control PRA from the VCU 200 when power is distributed. - It is also possible to directly control one's intermittent operation by receiving it as a wire I/O control. And, when the direct control assistance by the controller 105 is directly controlled in this way, when a small instantaneous voltage drop occurs by comparing the control voltage through the hard-wire I/O with a preset reference control voltage, the By supplementing the control power to the main relays (104-1, 104-2, ...) and the sub relays (103-1, ...), it has a function of momentarily delaying the relay cutoff, so the relay This is done by breaking the block. In addition, in addition to this, direct/indirect control assistance by the controller 105 is instantaneous by comparing the control voltage through the hard-wire I/O in the internal controller and the reference control voltage when direct control and indirect control are used together. When the voltage drop occurs and the direct control state at this time is different from the PRA control command of the vehicle internal communication, the main relays 104-1, 104-2, ... ) and the sub relays 103-1, ... By supplementing the control power, it has a function of momentarily delaying the relay disconnection, so it is achieved by canceling the instantaneous disconnection of the relay. Accordingly, when the controller 105 distributes power to the driving device of the electric vehicle, etc., the power is distributed from this high voltage relay multiple control system, so that chattering is prevented and the power distribution is highly stable, and the Abnormal stopping prevention is achieved.

The insulation monitoring device 106 measures the insulation resistance value between each battery and the vehicle body and provides it to the controller 105 . In this case, the controller 105 a) when the insulation resistance value is monitored by the insulation monitoring device 106, transmits the insulation resistance measurement result to the VCU 200 based on the monitored result. And, b) the monitored insulation resistance value is compared with a preset reference insulation resistance value. So the controller 105 returns the comparison result. When the monitored insulation resistance value is lower than the reference insulation resistance value, the VCU 200 warns of the risk of a short circuit, and does not warn when it conforms to the reference insulation resistance value, thereby preventing electrical safety accidents and damage to parts. has a preventive function.

On the other hand, when the power distribution device 100 according to another embodiment additionally interworks with the VCU 200 to become a high voltage relay multiple control system, the connection between the VCU 200 and itself is made quickly, so that a plurality of driving devices When it is necessary to distribute power to the

To this end, when the power distribution device 100 is assisted in indirect control or direct/indirect control by the above-described VCU 200, based on a power distribution table in which relay device information corresponding to a plurality of different driving device types is registered. By processing the PRA control command, power is distributed in units of work.

In this case, the power distribution table may be formed by, for example, grouping electric devices in an electric vehicle, and matching driving devices belonging to each group to relay device information for each type.

In this case, as the type of the driving device, for example, the air conditioner and the heater are the same type. Then, a steering device and a power converter device (eg, an inverter motor and a DC-DC converter) are set as the drive device types, respectively.

So, through this, when the high voltage relay multiple control system is implemented in conjunction with the VCU 200, the power distribution device 100 connects quickly between the VCU and itself, so that power must be distributed to a plurality of driving devices. power is distributed.

On the other hand, when power distribution is performed as described above, the power distribution device 100 according to an embodiment different from these predicts the power consumption pattern of each driving device, thereby detecting abnormality when power distribution is performed. make it possible

To this end, the controller 105 is additionally provided with the following configuration.

That is, the controller 105 is

a) Based on the power driving characteristics of each driving device, the power consumption pattern for each driving device is analyzed, and the predicted power consumption is matched and registered for each different power change pattern,

b) When each driving device is driven, the actual power change pattern is extracted,

c) by comparing the actual power consumption according to the extracted actual power change pattern with the predicted power consumption matched to the corresponding change pattern,

d) As a result of the comparison, when the difference value between the actual power consumption and the predicted power consumption falls within a preset range, the VCU is not alarmed, and, if applicable, an alarm is performed.

4 is a flowchart sequentially illustrating operations of a power distribution device to which a high voltage relay multiple control system of an electric vehicle is applied according to an exemplary embodiment (refer to FIG. 3 ).

As shown in FIG. 4 , in the power distribution device according to an embodiment, first, the main interface unit is installed for a plurality of different batteries in the electric vehicle, and receives main power from each battery ( S401 ).

In addition, the sub-interface unit is installed for a plurality of different charging devices in the electric vehicle, and receives sub power from each charging device (S402).

In this state, when an event related to power supply occurs, the controller receives the PRA control command for each different power event preset for power distribution based on the control format from the previously registered VCU through internal communication of the sub The intermittent operation of the relay and the main relay is indirectly controlled (S403 and S406-S407), and the PRA control state is fed back.

For example, the controller receives a PRA control command according to the mode from the VCU for each driving and charging mode of the electric vehicle through CAN communication to control the sub relay and the main relay.

At this time, for reference, the sub relay intermittently controls the sub power input by the sub interface unit. In addition, the main relay is installed for a plurality of different driving device types in the electric vehicle, and receives the main power input by the main interface unit and the sub power interrupted by the sub relay integrally to the driving device through the corresponding interface unit. control the power supply to

In addition, the main relay and the sub relay are different from the above indirect control, and when an event to supply power occurs, they receive PRA control from the VCU as hard-wire I/O control, and their intermittent operation is performed. It is also directly controlled (S404 and S406-S407).

And, in this case, when direct control is performed in this way, the controller compares the control voltage through the hard-wire I/O with a preset reference control voltage (S405), and when a small instantaneous voltage drop occurs, the main relay and the sub relay The control power is supplemented (S406).

On the other hand, when the instantaneous voltage drop does not occur, the general relay control command of the VCU is executed, and as such adjustment, it has a function of momentarily delaying the relay disconnection, so it is accomplished by resolving the momentary disconnection of the relay.

In addition, when direct control and indirect control are used together, an instantaneous voltage drop occurs by comparing the control voltage through hard-wire I/O in the internal controller with the reference control voltage, and the direct control state at this time is the If it is different from the PRA control command, the control power is supplemented to the main relay and the sub relay or the relay power is maintained (S406).

So, in this case different from the PRA control command, that is, when the direct control state is momentarily confirmed to be off, it supports the control power of the relay to delay the relay cutoff to maintain the operating state, and transmits the abnormal state to the VCU. Inducing vehicle inspection.

On the other hand, when the VCU cuts off the relay control power to turn off the relay, and the direct control state at this time is the same as the PRA control command of the vehicle internal communication, the main relay and the sub relay are turned off to normally block the relay. (S406).

That is, if the VCU cuts off the power to the hard-wired I/O to turn off the relay operation and is in an off state due to a normal voltage drop, and the PRA control command of the vehicle-side main controller is also an off command, the relay is normally turned off, resulting in chattering prevent the phenomenon.

Therefore, in the case of power distribution in the electric vehicle, the power distribution device according to an embodiment is technically implemented with a control method with the VCU to prevent chattering, and the power distribution is performed stably and abnormally in the vehicle. Stop protection is achieved.

As a part of this advantage, when power is distributed, an error occurs in the vehicle or chattering at the relay contact point due to a voltage drop in the relay power due to the surrounding environment, causing instantaneous voltage boost and inside the PDU or to prevent damage to high voltage components.

As described above, in one embodiment, direct control assistance, that is, the vehicle-side main controller directly controls the high voltage relay inside the power distribution device through hard-wire I/O, and direct/indirect control assistance, that is, this direct In addition to the control, the high voltage relay multiple control is performed by integrally performing a method of assisting the use of indirect control using the high voltage relay control command of the vehicle side main controller through internal communication within the vehicle.

And, at this time, when this direct control assistance becomes direct control, the internal controller monitors the control voltage through the hard-wire I/O, and has a function of momentarily delaying the relay disconnection when an abnormality occurs. This is achieved by breaking the momentary blockage of

In addition, when direct control and indirect control are the same, this direct/indirect control assist has a function of momentarily delaying relay blocking when one control is wrong through the mutual comparison between direct control and indirect control in the internal controller. , by relieving the momentary interruption of the relay.

Accordingly, in one embodiment, when power is distributed in an electric vehicle, an abnormality occurs in the vehicle or a voltage drop of the relay power source is caused by the surrounding environment to prevent chattering at the relay contact point to increase the instantaneous voltage. and damage to the PDU's internal or high-voltage components caused by it.

Or, furthermore, the vehicle is prevented from stopping abnormally due to the power being cut off to the driving device due to unintentional relay operation stop.

Meanwhile, in addition, this power distribution device includes an insulation monitoring device provided to the controller by monitoring the insulation resistance value between each battery and the vehicle body (S408).

And, in this case, the controller also performs the following operation.

a) That is, when the insulation resistance value is monitored by the insulation monitoring device, the controller transmits the insulation resistance measurement result to the VCU based on the monitored result.

b) Then, the monitored insulation resistance value is compared with a preset reference insulation resistance value (S409).

As a result of the comparison, when the monitored insulation resistance value does not correspond to the reference insulation resistance value, the VCU warns the risk of short circuit (S410), and if applicable, does not warn, thereby preventing electrical safety accidents and driving safely Implement a power distribution system that promotes

100: power distribution device 200: VCU
101: main interface unit 102: sub interface unit
103: sub relay 104: main relay
105: controller 106: insulation monitoring device

Claims (4)

a main interface unit installed for a plurality of different batteries in the electric vehicle and receiving main power from each battery;
a sub interface unit installed for a plurality of different charging devices in the electric vehicle and receiving sub power from each charging device;
a sub relay controlling the sub power input by the sub interface unit;
A main power that is installed for a plurality of different driving device types in the electric vehicle and receives the main power inputted by the main interface unit and the sub power interrupted by the sub relay integrally and controls the driving device through the corresponding interface unit relay; and
a controller for distributing power to each driving device by controlling the intermittent operation of the sub relay and the intermittent operation of the main relay according to a preset power event occurrence; contains,

The controller is
When the power is distributed, a PRA (Power Relay Assy) control command for each power event preset in relation to power distribution is provided through internal communication of the vehicle based on a corresponding control format from a pre-registered vehicle-side main controller, and the sub Intermittent operation of relay and main relay control, feedback PRA control status,
The main relay and the sub relay,
When the power is distributed, PRA control from the vehicle-side main controller is received as a hard-wire I/O control, and its own intermittent operation can be directly controlled,

The controller is
a) When the hard-wire I/O is directly controlled by the vehicle-side main controller, the control voltage input to the main relay and the sub relay through the hard-wire I/O is compared with a preset reference control voltage. ,
b) As a result of the comparison, when an instantaneous voltage drop smaller than the reference control voltage occurs, the control power of the main relay and the sub relay is supported, and when a normal voltage drop occurs to turn off the relay power, the relay control power is turned on preventing the chattering phenomenon by turning off the relay by blocking; A power distribution device to which a high voltage relay multi-control system of an electric vehicle is applied. The method according to claim 1,
The controller is
c) When the indirect control by the vehicle internal communication and the direct control by the hard-wire I/O are integrated by the vehicle-side main controller, the control voltage input to the main relay through the hard-wire I/O is compared with a preset reference control voltage,
d) By checking the status information of the PRA control command input through the vehicle internal communication,
e-1) In the operation state of the relay, as a result of the comparison and confirmation, the PRA indirect control command by in-vehicle communication of the vehicle-side main controller maintains the operation command, while the hard-wired I/O to the vehicle When an abnormality occurs or an instantaneous voltage drop occurs due to the surrounding environment and the direct control state is momentarily confirmed to be off, the control power of the relay is supported to delay the relay shutoff to maintain the operating state, and Inducing inspection of the vehicle by conveying the abnormal state,
e-2) As a result of the comparison and confirmation, the vehicle-side main controller cuts off the power to the hard-wire I/O to turn off the relay operation and is in an off state due to a normal voltage drop, and the PRA control command of the vehicle-side main controller is also an off command in the case of preventing chattering by turning off the relay normally; A power distribution device to which a high voltage relay multi-control system of an electric vehicle is applied. 3. The method according to claim 2,
an insulation monitoring device for monitoring an insulation resistance value between each battery and the vehicle body and providing it to the controller; including,
The controller is
a) When the insulation resistance value is monitored by the insulation monitoring device, the insulation resistance measurement result is transmitted to the vehicle-side main controller based on the monitored result,
b) comparing the monitored insulation resistance value with a preset reference insulation resistance value, and warning the vehicle-side main controller of the risk of a short circuit when the monitored insulation resistance value does not correspond to the reference insulation resistance value as a result of the comparison; , If the insulation resistance value drops to a risk of electric shock level even while warning the vehicle-side main controller, or if it continues for a certain period of time, a failure warning is notified to the vehicle-side main controller for safety and the high voltage relay is cut off to reduce the risk of electric shock preventing an electric shock accident by blocking and not warning when the monitored insulation resistance value corresponds to the reference insulation resistance value as a result of the comparison; A power distribution device to which a high voltage relay multi-control system of an electric vehicle is applied. The method according to claim 1,
The controller is
When indirect control is performed by the vehicle-side main controller, power distribution is performed in units of work by processing a PRA control command based on a power distribution table in which relay device information corresponding to a plurality of different drive device types is registered. ; A power distribution device to which a high voltage relay multi-control system of an electric vehicle is applied.

Images