JP2011207384A - Power supply apparatus for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To save power consumed in a vehicle battery without providing individual wiring connection between each load loaded on a vehicle and the battery.SOLUTION: The vehicle battery and a plurality of the loads are connected in a net-like state through a plurality of switching circuits 21a, 21b, 22a to 22d, and a wire harness, wherein the plurality of the switching circuits 21a, 21b, 22a to 22d are switched between a power conductive state and a power shut-off state. A control part 23 identifies a vehicle condition with a predetermined vehicle condition, and controls to switch the plurality of the switching circuits so as to put the switching circuit provided between the load to be powered and the vehicle battery in the power conductive state, and put the switching circuit provided between the load not to be powered and the vehicle battery in the power shut-off state in accordance with the identified vehicle condition.

Description

  The present invention relates to a vehicle power supply device that supplies power from a vehicle battery mounted on a vehicle to a plurality of loads mounted on the vehicle via a wire harness.

  2. Description of the Related Art Conventionally, there is one that connects a vehicle battery mounted on a vehicle and a large number of electrical components mounted on the vehicle via various wirings such as trunk wiring and branch wiring (for example, Patent Document 1). reference).

Japanese Patent Publication No.57-34132

  The vehicle is provided with a plurality of power supply lines such as a constant power supply (+ B), an accessory power supply (ACC), and an ignition power supply (IG), and each load installed in the vehicle requires each load. It is connected to the power line. Then, when the power supply position is sequentially switched according to the pressing operation or the brake operation on the start switch for instructing the engine to be started by the driver, or the operation of the ignition key by the driver, power is sequentially supplied to each power supply line. It is like that. Specifically, when the power supply position is off (OFF), power is always supplied to the power supply line of the power supply (+ B), and power is not supplied to the power supply lines of the accessory power supply (ACC) and the ignition power supply (IG). . When the power supply position is switched to the accessory (ACC), power is supplied to both the power supply lines of the constant power supply (+ B) and the accessory power supply (ACC), and no power is supplied to the power supply line of the ignition power supply (IG). Further, when the power supply position is switched to ignition on (IG-ON), power is supplied to the power supply lines of the constant power supply (+ B), the accessory power supply (ACC), and the ignition power supply (IG).

  In such a configuration, power is sequentially supplied to each power supply line step by step according to the driver's operation, so that power is supplied even to a load that does not require power supply. Subsequently, wasteful power is consumed by these loads. For example, when power is supplied to the power line of the ignition power supply according to the operation of the operation unit by the driver, power is continuously supplied not only to the power supply line of the ignition power supply but also to the power supply line of the constant power supply. Like an immobilizer ECU that performs key verification, power is continuously supplied to a load that requires power supply from a constant power supply but does not require power supply from an ignition power supply, and wasteful power is consumed.

  Therefore, for example, a wire harness (power supply line) is added so that the control unit and each load are individually connected, for example, one-to-one, and power supply to a load that does not require power supply is individually stopped. Can be considered. However, in such a configuration, the number of wire harnesses increases, resulting in an increase in cost, and there is a problem that fuel consumption may be deteriorated due to an increase in weight.

  The present invention has been made in view of the above problems, and an object of the present invention is to save power consumed by a vehicle battery without separately wiring a load mounted on the vehicle.

  In order to achieve the above object, an invention according to claim 1 is a vehicle power supply device that supplies power to a plurality of loads mounted on a vehicle via a wire harness from a vehicle battery mounted on the vehicle. And a plurality of switching means for switching the energized state or the cut-off state according to a control signal from the control unit, and the vehicle battery and the plurality of loads are connected in a mesh shape via the plurality of switching means and a wire harness. And the control unit specifies information collecting means for collecting information for specifying a predetermined vehicle situation, and specifies a predetermined vehicle situation based on the information collected by the information collecting means, In accordance with the specified vehicle situation, the switching means disposed between the load to which power is to be supplied and the vehicle battery is turned on, and the load to be stopped and the vehicle battery are to be stopped. Is characterized by comprising a switching control means for switching control of the plurality of switching means arranged switching means outputs a control signal to the cut-off state during the re.

  According to such a configuration, a predetermined vehicle situation should be specified based on information for specifying a predetermined vehicle situation, and power should be supplied according to the specified vehicle situation. A control signal is output so that the switching means arranged between the load and the vehicle battery is in a conducting state and the switching means arranged between the load and the vehicle battery from which power supply is to be stopped is cut off. Thus, since the switching control of the plurality of switching means is performed, it is possible to save the power consumed by the vehicle battery without separately wiring between the loads mounted on the vehicle.

  In the invention according to claim 2, the load is connected to the vehicle battery via a plurality of different switching means connected in parallel, and the control unit is connected to the plurality of different switching means connected in parallel. When it is determined that the power supply to the connected load has become abnormal, the power supply to the load connected to a plurality of different switching means connected in parallel is different so that the power supply to the load is normal. It is characterized in that a control signal is output to a plurality of switching means to perform switching control of the plurality of switching means.

  According to such a configuration, the load is connected to the vehicle battery via a plurality of different switching means connected in parallel, and the control unit is connected to a plurality of different switching means connected in parallel. When it is determined that the power supply to the load has become abnormal, a plurality of different switches connected in parallel so that the power supply to the load connected to a plurality of different switching means connected in parallel is normal Since the control signal is outputted to the means and the switching control of the plurality of switching means is performed, the backup by the different switching means connected in parallel becomes possible, and the reliability can be improved.

  According to a third aspect of the present invention, the control unit includes a communication unit for performing power line communication using the wire harness as a communication line, and performs power line communication with the load via the communication unit. The control unit is characterized in that each of the loads is put into an operating state or a stopped state by power line communication.

  According to such a configuration, the control unit can place each of the loads in an operating state or a stopped state by power line communication, and thus a new connection line for placing each load in the operating state or the stopped state is arranged. Therefore, it is possible to save power by individually stopping loads that should stop supplying power.

  Further, as in the fourth aspect of the invention, the information collecting means can also collect information for specifying a predetermined vehicle situation via power line communication.

  In the invention according to claim 5, the switching control means obtains a condition for specifying the importance of power supply to the load, and sets the condition for specifying the importance of power supply to the load. Based on this, the priority of power supply to the load is determined, and the switching control of the plurality of switching means is changed according to the priority of power supply to the load.

  According to such a configuration, the priority of the power supply to the load is determined based on the condition for specifying the importance of the power supply to the load, and a plurality of priority is set according to the priority of the power supply to the load. Since the switching control of the switching means is changed, it is possible to start or stop the optimal power supply to the load according to the priority of power supply to the load.

  According to a sixth aspect of the present invention, the vehicle is equipped with a plurality of vehicle batteries, and the switching control means switches the switching means so as to average the power supply amounts of the plurality of vehicle batteries. It is characterized by performing.

  According to such a configuration, since switching control of the switching means is performed so as to average the power supply amounts of the plurality of vehicle batteries, it is possible to save power by suppressing wasteful power generation.

  In the invention according to claim 7, when the switching control unit specifies that the vehicle is in a stopped state, the switching is arranged between the load to which power is to be supplied and the vehicle battery in the state where the vehicle is stopped. A plurality of switching means by outputting a control signal so that the switching means disposed between the load and the vehicle battery which should stop power supply in a situation where the vehicle is running and the vehicle battery are cut off. The switching control is performed.

  According to such a configuration, when it is specified that the vehicle is in a stopped state, the switching means disposed between the load to which power is to be supplied and the vehicle battery in a state where the vehicle is stopped and the vehicle battery are in a conductive state. Since switching control of a plurality of switching means is performed by outputting a control signal so that the switching means arranged between the load that should stop power supply and the vehicle battery in a situation where the vehicle travels and the vehicle battery, It is possible to prevent wasteful power consumption while the vehicle is stopped.

  In the invention according to claim 8, when the switching control means specifies that the vehicle is traveling, the switching control means places between the load to which power is to be supplied and the vehicle battery while the vehicle is traveling. A control signal is output so that the arranged switching means is turned on, and the switching means arranged between the load and the vehicle battery to be stopped when the vehicle is stopped is turned off. It is characterized by switching control of a plurality of switching means.

  According to such a configuration, when it is specified that the vehicle is traveling, the switching control means is disposed between the load to which power is to be supplied and the vehicle battery while the vehicle is traveling. A plurality of switching by outputting a control signal so that the switching means is in a conduction state and the switching means arranged between the load and the vehicle battery that should stop power supply when the vehicle is stopped and the vehicle battery is cut off. Since the means switching control is performed, it is possible to prevent wasteful power consumption while the vehicle is traveling.

  According to the ninth aspect of the present invention, when the switching control unit specifies that the occupant is in the vehicle, the switching control unit is provided between the vehicle battery and the load to which power is to be supplied in the state where the occupant is in the vehicle. A control signal is output so that the switching means placed in a conductive state and the switching means placed between a load that should stop power supply and the vehicle battery in a situation where an occupant is in the vehicle and the vehicle battery are shut off. Thus, the switching control of a plurality of switching means is performed.

  According to such a configuration, the switching control means is disposed between the vehicle battery and the load to which power is to be supplied when the occupant is in the vehicle when the occupant is in the vehicle. A plurality of control signals are output by setting the switching means to a conductive state and outputting a control signal so that the switching means disposed between the load and the vehicle battery that should stop power supply in a situation where an occupant is on the vehicle and the vehicle battery is cut off. Since the switching control of the switching means is performed, it is possible to prevent wasteful power consumption in a situation where an occupant gets on the vehicle.

  The invention as set forth in claim 10 is characterized in that the control section and the switching means are stored in the same case.

  In this way, standardization can be achieved by storing the control unit and the switching means in the same case. For example, application to not only a specific vehicle type but also a plurality of different vehicle types can be facilitated.

  The invention according to claim 11 is characterized in that at least one of the plurality of vehicle batteries is stored in the same case together with the control unit and the switching means.

  Thus, it becomes possible to achieve standardization by storing at least one of the plurality of vehicle batteries together with the control unit and the switching unit in the same case. For example, not only a specific vehicle type but also a plurality of different vehicle types Can be easily applied.

  The invention according to claim 12 has a structure in which the case can be attached to a position where a junction box for concentrating wire harnesses connected to a plurality of loads mounted on a vehicle is arranged. It is characterized by having.

  In this way, the case has a structure that allows attachment to a position where a junction box that collects wire harnesses connected to a plurality of loads mounted on a vehicle is arranged. Alternatively, it can be easily attached to the vehicle.

  The invention as set forth in claim 13 is characterized in that the control unit and the switching means are arranged in a junction box for collecting wire harnesses connected to a plurality of loads mounted on the vehicle.

  In this way, the control unit and the switching means can be arranged in a junction box that collects wire harnesses connected to a plurality of loads mounted on the vehicle.

  In the invention according to claim 14, the control unit has an in-vehicle LAN interface for connecting to an in-vehicle LAN connected to a plurality of loads, and is connected to the in-vehicle LAN via the in-vehicle LAN interface. Each of these is set to an operation state or a stop state.

  In this way, the control unit has an in-vehicle LAN interface for connecting to an in-vehicle LAN connected to a plurality of loads, and connects to the in-vehicle LAN via the in-vehicle LAN interface, and each load is operated or stopped. Can be in a state.

It is a figure which shows the structural example of the electric power supply apparatus for vehicles which concerns on one Embodiment of this invention. It is a figure which shows the example of power distribution corresponding to the structural example of the electric power supply apparatus for vehicles which concerns on one Embodiment of this invention. It is a figure for demonstrating the action | operation of a control part. It is a figure for demonstrating a modification.

(First embodiment)
FIG. 1 shows a configuration example of a vehicle power supply device according to the first embodiment of the present invention. This vehicle power supply device 1 supplies power from a vehicle battery 10 mounted on a vehicle to a plurality of loads mounted on the vehicle via a wire harness (power line). The vehicle also has an idling stop function and an auto cruise function. In this embodiment, a body ECU 30, a door lock motor 30a, an immobilizer ECU (denoted as immobilizer ECU) 31, an air conditioner ECU 32, an antilock brake system ECU (denoted as ABS ECU in the diagram) 33, an engine ECU 34, a cruise ECU 35, and Although the laser radar 35a will be described as a plurality of loads mounted on the vehicle, actually, other various loads are also mounted on the vehicle.

  The vehicle power supply device 1 includes a control unit 23 and switching circuits 21a, 21b, 22a, 22b, 22c, and 22d, which are stored in a power supply box. The vehicle battery 10 and a plurality of loads are connected in a mesh shape (tree shape) via switching circuits 21a, 21b, 22a, 22b, 22c, 22d and a wire harness.

  The switching circuits 21a and 21b are arranged between the vehicle battery 10 and a plurality of loads mounted on the vehicle, respectively, and are energized according to a control signal input from the control unit 23 via a control line (not shown). Or the shut-off state is switched.

  A load that requires power supply when the vehicle is parked is connected to the switching circuit 21a, and a load that requires power supply when the vehicle is running is connected to the switching circuit 21b. Note that a load such as an air conditioner ECU 32 that requires power supply even when the vehicle is parked or running is connected from both the switching circuit 21a and the switching circuit 21b.

  The switching circuits 22a to 22d are respectively arranged between the vehicle battery 10 and a plurality of loads mounted on the vehicle, and are connected according to a control signal input from the control unit 23 via a control line (not shown). Switches. The switching circuits 22a to 22d are configured by an electromagnetic relay having one movable contact and two fixed contacts, and according to a control signal from the control unit 23, either the movable contact or the two fixed contacts. The contact is in a conductive state, and the other contact between the movable contact and the two fixed contacts is in a disconnected state.

  In the switching circuits 22a, 22b, 22c, and 22d, switching between the supply of power to the load to which power supply should be supplied and the stop of power supply to the load that should stop power supply according to the state of the vehicle, respectively. Each load is classified and connected so as to be possible.

  The control part 23 is comprised as a computer provided with CPU23a, the memory 23b, and the communication part 23c, and CPU23a implements various processes according to the program memorize | stored in the memory 23b. The communication unit 23c is for performing power line communication using the power line between the load and the load as a communication line.

  Although not shown, the body ECU 30 and the air conditioner ECU 32 in the present embodiment are provided with the same components as the communication unit 23c.

  The control unit 23 can individually set the body ECU 30 and the air conditioner ECU 32 to an operating state or a stopped state by power line communication using a power line with the load.

  The body ECU 30 manages whether the vehicle is in a parked state or a traveling state, and performs control such as locking or unlocking a power window and a door provided in the vehicle. The body ECU 30 controls the door lock or unlock by driving the door lock motor 30a.

  When the locking or unlocking of the vehicle door is completed, a signal indicating that the locking or unlocking of the vehicle door has been completed is input from the door lock motor 30a to the body ECU 30.

  The body ECU 30 sends a signal corresponding to the unlocking operation of the vehicle door, a signal indicating that the unlocking of the vehicle door is completed, and the like to the control unit 23. The body ECU 30 sends an engine start request signal or an engine stop request signal to the engine ECU 34 in response to a user operation.

  The immobilizer ECU 31 electronically collates the unique ID code of the transponder embedded in the key and permits engine start. The immobilizer ECU 31 does not require power supply while the vehicle is running, and corresponds to a load that should stop power supply.

  The air conditioner ECU 32 performs various controls for vehicle interior air conditioning such as cooling, heating, and air blowing. The activation or stop of the air conditioner ECU 32 is performed by operating an air conditioner operation unit.

  The anti-lock brake system ECU 33 performs braking control so as to prevent the tire from locking during braking.

  The engine ECU 34 comprehensively performs electrical control in engine running. The engine ECU 34 starts the engine according to the engine start request signal, and stops the engine according to the engine stop request signal. The engine ECU 34 has an idle stop function for automatically stopping the engine when the vehicle is stopped, and outputs information indicating the idle stop state to the control unit 23 when the idle stop state is entered.

  The cruise ECU 35 measures the distance from the preceding vehicle using a laser radar 35a, and travels so that the distance between the preceding vehicle and the preceding vehicle is constant, or travels at a constant speed regardless of the accelerator operation. Perform cruise control. The cruise ECU 35 is started or stopped by operating an operation unit disposed in the vicinity of the steering or the like.

  FIG. 2 shows a power distribution example corresponding to the configuration example of the vehicle power supply device 1 shown in FIG. In FIG. 2, the control unit 23 shown in FIG. 1 is omitted. In this embodiment, the engine is started in response to an operation for instructing the engine to be started by the driver, for example, a pressing operation on a start switch for starting the engine while stepping on the brake, and the vehicle is ready to run Is in the running state. Note that the idle stop state in which the engine is stopped by the idling stop function is included in the running state. Then, a state in which the engine is stopped in accordance with an operation for instructing the engine to stop by the driver, for example, a pressing operation on the start switch while the vehicle is stopped is set as a parking state.

  The switching circuit 21a is in an energized state (on state) in a parking state to supply power to a load to which power is to be supplied, and in a traveling state, it is in a cut-off state (off state) and stops supplying power. The control unit 23 controls the power supply to the load to be cut off.

  On the other hand, the switching circuit 21b is in a cut-off state (off state) when parked, cuts off power supply to a load that should stop power supply, and is in an energized state (on state) when running. Thus, the control unit 23 controls the power supply so as to supply power to the load to which power is to be supplied.

  The switching circuit 22a is normally in the connection state shown in FIG. 2, and the connection state is switched in accordance with the door unlocking operation, and in FIG. 2 in accordance with the completion of the door unlock control. It is controlled by the control unit 23 so as to return to the connected state.

  The switching circuit 22b is normally in the connection state shown in FIG. 2, and the connection state is switched in accordance with an operation on the air conditioner operation unit, and in FIG. It is controlled by the control unit 23 so as to return to the connection state shown in FIG.

  The switching circuit 22c is normally in the connection state shown in FIG. 2, and the connection state is switched when the idle stop state is reached, and returns to the connection state shown in FIG. 2 when the idle stop state is lost. It is controlled by the control unit 23.

  The switching circuit 22d is normally in the connection state shown in FIG. 2, and the connection state is switched according to the operation start instruction for the auto cruise operation unit, and the connection circuit 22d is switched according to the operation end instruction for the auto cruise operation unit. 2 is controlled by the control unit 23 so as to return to the connection state shown in FIG.

  Next, according to FIG. 3, the operation when the control unit 23 identifies the situation of the vehicle and performs the switching control of each switching circuit according to the situation of the vehicle will be described. The memory 23b has information (map) indicating which load is supplied with power to each switching circuit when the switch circuit is turned on and to which load power supply is stopped when the switch circuit is turned off. It is remembered. The control unit 23 performs switching control of a plurality of switching circuits based on this information.

  First, the control part 23 acquires the information for specifying the condition of a vehicle, and specifies the condition of a vehicle based on this acquired information (S100). Specifically, information for specifying whether the vehicle is in a parking state or a traveling state is acquired from the engine starting state, and whether the vehicle is in a parking state or a traveling state is specified.

  Here, it is assumed that the engine is in a stopped state (parking state) in response to an operation for instructing the engine to be stopped by the driver. In this case, it is determined that the vehicle is parked, and the parking power supply is energized (S102). Specifically, a control signal is output to each of the switching circuits 21a and 21b so that the switching circuit 21a is turned on and the switching circuit 21b is turned off, and the switching circuit 21a passes through the switching circuits 22a and 22b. The switching circuit 22a and the switching circuit 22b are controlled so that electric power is supplied from the vehicle battery 10 to the power supply path (parking power supply) leading to the immobilizer ECU 31. At this time, electric power is supplied from the vehicle battery 10 to the body ECU 30 and the immobilizer ECU 31, and supply of electric power to loads other than the body ECU 30 and the immobilizer ECU 31 is cut off.

  Here, when the unlocking operation of the vehicle door is performed and a signal corresponding to the unlocking operation of the vehicle door is input (S104), the vehicle is in a parked state and is unlocked by the occupant. It is determined that the lock operation has been performed, and the door lock motor 30a is energized (S106). Specifically, the connection state of the switching circuit 22a is switched, and a control signal is sent to the switching circuit 22a so that electric power is supplied from the switching circuit 22a to the door lock motor 30a, the body ECU 30, and the immobilizer ECU 31. Thereby, the door lock motor 30a starts to rotate.

  Next, when unlocking of the vehicle door is completed and a signal indicating whether the unlocking of the vehicle door is completed is input from the body ECU 30 (S108), the vehicle is parked and the vehicle door is unlocked. Then, it is determined that the unlocking has been completed, and the power supply to the door lock motor 30a of the vehicle is cut off (S110). Specifically, energization to the door lock motor 30a of the vehicle is cut off by sending a control signal to the switching circuit 22a so as to return the connection state of the switching circuit 22a to the original state shown in FIG.

  Next, when the air conditioner operation is performed by the occupant and a signal corresponding to the operation of the air conditioner operation unit by the occupant is input (S112), the vehicle is in a parked state and the occupant operates the air conditioner operation unit. Then, the air conditioner ECU 32 is turned on (S114). Specifically, the connection state of the switching circuit 22b is switched, and a control signal is sent to the switching circuit 22b so that electric power is supplied from the switching circuit 22b to the air conditioner ECU 32 and the immobilizer ECU 31.

  Next, when an engine start operation is performed and an engine start request signal is input (S116), it is determined that the vehicle state is a state where the vehicle is in the running state from the parking state, and the parking power supply is shut off (S118). Then, the running power supply is energized (S120). Specifically, a control signal is output to each of the switching circuits 21a and 21b so that the switching circuit 21a is turned off and the switching circuit 21b is turned on, and the switching circuit 21b through the switching circuits 22c and 22d. The switching circuit 22c and the switching circuit 22d are controlled so that electric power is supplied from the vehicle battery 10 to a power supply path (running power supply) leading to the air conditioner ECU 32 and the engine ECU 34. At this time, electric power is supplied from the vehicle battery 10 to the anti-lock brake system ECU 33, the air conditioner ECU 32, and the engine ECU 34, and power supply to loads other than the anti-lock brake system ECU 33, the air conditioner ECU 32, and the engine ECU 34 is cut off.

  Next, when an operation for instructing the start of operation of the cruise ECU 35 is performed by the occupant and a signal for instructing the start of the cruise ECU 35 is input (S122), the vehicle is in a running state and the auto cruise control is performed. It is determined that the situation is to be started, and the cruise ECU 35 is energized (S124). Specifically, the connection state of the switching circuit 22d is switched, and a control signal is sent to the switching circuit 22b so that electric power is supplied from the switching circuit 22d to the air conditioner ECU 32, the engine ECU 34, the laser radar 35a, and the cruise ECU 35.

  Next, when an operation for instructing to stop the operation of the cruise ECU 35 is performed by the occupant and a signal to instruct the stop of the cruise ECU 35 is input (S126), the vehicle is in a running state and the auto cruise control is performed. It is determined that the situation is to be stopped, and the power supply to the cruise ECU 35 is cut off (S128). Specifically, the energization to the cruise ECU 35 is interrupted by sending a control signal to the switching circuit 22d so as to return the connection state of the switching circuit 22d to the state shown in FIG.

  Next, when the vehicle enters the idle stop state and information indicating the idle stop state is input (S130), it is determined that the vehicle is in the traveling state and the idle stop state, and the engine ECU 34 is determined. Is turned off (S132). Specifically, the connection state of the switching circuit 22c is switched, and a control signal is sent to the switching circuit 22c so that electric power is supplied from the switching circuit 22c to the air conditioner ECU 32.

  Next, when the vehicle resumes running, the idle stop state is released, and information indicating the release of the idle stop state is input (S134), the vehicle is in the running state and is in the idle stop stop state. It is determined that the situation is present, and the engine ECU 34 is energized (S136). Specifically, power supply to the engine ECU 34 is started by sending a control signal to the switching circuit 22c so as to return the connection state of the switching circuit 22c to the state shown in FIG.

  As described above, the control unit 23 identifies the vehicle situation, and repeatedly performs switching control of the plurality of switching circuits according to the identified vehicle situation.

  According to the configuration described above, a plurality of switching circuits that switch the energized state or the cut-off state according to a control signal from the control unit are provided, and the vehicle battery and the plurality of loads are connected via the plurality of switching circuits and the wire harness. The control unit collects information for identifying a predetermined vehicle situation, identifies a predetermined vehicle situation based on the collected information, and identifies the vehicle. The switching circuit arranged between the load to be supplied with power and the vehicle battery is brought into a conductive state according to the situation of the vehicle, and the switching circuit arranged between the load to be supplied with power and the vehicle battery is stopped. Since the control signal is output so as to set the shut-off state, the switching control of the plurality of switching circuits is performed, so that it is consumed by the vehicle battery without separately wiring between the load mounted on the vehicle. That the power of the power saving can be achieved.

  In addition, the information for specifying the predetermined vehicle situation is information that can specify the load that should supply power and the load that should stop supplying power for each load mounted on the vehicle. be able to.

  Further, if the “vehicle status” is subdivided to increase the number of settings and the number of switching circuits, the processing becomes complicated, but fine switching control is possible, and a large power consumption reduction effect can be obtained. . In addition, if the number of “vehicle status” settings is reduced, the effect of reducing power consumption is limited, but the number of switching circuits can be reduced and the processing can be simplified. As described above, it is possible to implement switching control suitable for each vehicle by appropriately changing the set number of “vehicle status” and the number of switching circuits.

  Further, the load is connected to the vehicle battery through a plurality of different switching circuits connected in parallel.

  According to such a configuration, the load is connected to the vehicle battery via a plurality of different switching means connected in parallel, and the power is supplied via the plurality of different switching means connected in parallel from the vehicle battery. Since the power supply via one of the switching means becomes abnormal, the power is supplied to the load via another switching means connected in parallel. Can be improved.

  In addition, the control unit has a communication unit for performing power line communication using the wire harness as a communication line, and can perform power line communication with the load via the communication unit. Since the power supply line communication sets each of the loads to the operating state or the stopped state, the power supply should be stopped without newly providing a connection line for setting each load to the operating state or the stopped state. It is possible to save power by individually stopping the load.

  In addition, when it is specified that the vehicle is in a stopped state, the switching circuit arranged between the load to which power is to be supplied and the vehicle battery in a state in which the vehicle is stopped is brought into a conductive state, and the vehicle is in a traveling state. Since the control signal is output so that the switching circuit arranged between the load that should stop the supply of power and the vehicle battery is cut off, the switching control of the plurality of switching circuits is performed, so that the vehicle is stopped It is possible to avoid wasting unnecessary power.

  In addition, when the control unit specifies that the vehicle is traveling, the control circuit places the switching circuit disposed between the load to which power is to be supplied and the vehicle battery in a conductive state while the vehicle is traveling. At the same time, when the vehicle is stopped, the control signal is output so that the switching circuit disposed between the load and the vehicle battery that should stop supplying power is cut off, and the switching control of the plurality of switching circuits is performed. Therefore, it is possible to prevent wasteful power consumption while the vehicle is traveling.

  Further, since the control unit and the switching circuit are stored in the same case, standardization can be achieved, and for example, application to a plurality of different vehicle types as well as a specific vehicle type can be facilitated.

  In addition, when the control unit specifies that the occupant is in the vehicle, the controller places the switching circuit disposed between the load to which power is to be supplied and the vehicle battery in the state where the occupant is in the vehicle. At the same time, the control signal is output so that the switching circuit arranged between the load that should stop power supply and the vehicle battery in a situation where an occupant gets on the vehicle and the vehicle battery are in the cut-off state, thereby performing switching control of the plurality of switching circuits It is characterized by doing.

According to such a configuration, the switching control means is disposed between the vehicle battery and the load to which power is to be supplied when the occupant is in the vehicle when the occupant is in the vehicle. A plurality of control signals are output so that the switching circuit is turned on and the switching circuit arranged between the vehicle battery and the load that should stop power supply in a situation where an occupant is on the vehicle and the vehicle battery is shut off. Since the switching control of the switching circuit is performed, it is possible to prevent wasteful power consumption in a situation where an occupant gets on the vehicle.
(Second Embodiment)
In the first embodiment, the control unit 20 collects information for specifying a predetermined vehicle situation, specifies a predetermined vehicle situation based on the collected information, and specifies the specified vehicle. Depending on the situation, the switching circuit disposed between the load to which power is to be supplied and the vehicle battery is brought into conduction, and the switching circuit disposed between the load to be supplied with power and the vehicle battery is Although the control signal is output so as to be in the cut-off state and the switching control of the plurality of switching circuits is performed, in the present embodiment, a condition for specifying the importance level of power supply to the load is further acquired. , Determining priority of power supply to the load based on a condition for specifying the importance of power supply to the load, and switching control of a plurality of switching circuits according to the priority of power supply to the load To change.

  Specifically, as a condition for specifying the importance of power supply to the load, raindrop detection information obtained by a raindrop sensor (not shown) mounted on the vehicle is acquired, and the raindrop is detected based on the detection information. If it is determined that the raindrop is not detected based on the detection information, the power supply priority to the wiper ECU is decreased. To do. Then, when the priority is high, power is supplied to the wiper ECU, and when the priority is low, a control signal is sent to each switching circuit so as to stop the supply of power to the wiper ECU.

  Further, as a condition for specifying the importance of power supply to the load, vehicle speed information indicating the traveling speed is acquired, and when it is determined that the vehicle is traveling based on the vehicle speed information, the door is locked. When the priority of the power supply to the body ECU 30 is increased and it is determined that the vehicle is stopped based on the vehicle speed information, the priority of the power supply to the body ECU 30 that performs door locking is reduced, and the priority is reduced. When it is high, power is supplied to the body ECU 30, and when the priority is low, a control signal is sent to each switching circuit so as to stop the supply of power to the body ECU 30.

  According to the configuration described above, the priority of power supply to the load is determined based on the condition for specifying the importance of power supply to the load, and a plurality of priority levels are determined according to the priority of power supply to the load. Since the switching control of the switching circuit is changed, it is possible to start or stop the optimal power supply to the load according to the priority of power supply to the load.

(Third embodiment)
FIG. 4 shows a configuration example of the vehicle power supply device according to the present embodiment. In addition, the same code | symbol is attached | subjected to the same part as the said embodiment, description is abbreviate | omitted, and it demonstrates below centering on a different part.

  Two vehicle batteries 10 are mounted on the vehicle according to the present embodiment. The engine ECU 34 is configured to receive power from one vehicle battery 10, and the body ECU 30 is configured to receive power from the other vehicle battery 10. The cruise ECU 35, the light 40, and the air conditioner ECU 32 are supplied with power from either of the two vehicle batteries 10 via a switching circuit 50 that performs switching control according to a control signal sent from the control unit 23. Is possible.

  The control unit 23 collects information for identifying a predetermined vehicle situation, identifies a predetermined vehicle situation based on the collected information, and determines each vehicle according to the identified vehicle situation. In order to average the power supply amount of the vehicle battery 10, the switching circuit arranged between the load to which power is to be supplied and the vehicle battery is brought into a conductive state, and the load of the vehicle battery and the vehicle battery 10 to be stopped A control signal is output so that the switching circuit disposed between them is put into a cut-off state, and switching control of the switching circuit 50 is performed.

  Further, the control unit 23 places each of the loads in an operating state or a stopped state by power line communication so as to average the power supply amount of each vehicle battery 10.

  According to the above-described configuration, the switching control of the switching circuit is performed so as to average the power supply amounts of the plurality of vehicle batteries. Therefore, it is possible to save power by suppressing wasteful power generation.

  In the first embodiment, the control unit and the switching circuit are stored in the same case. For example, at least one of the plurality of vehicle batteries is stored in the same case together with the control unit and the switching circuit. You may do it.

(Other embodiments)
In the above embodiment, the CPU 23a, the memory 23b, and the like are provided, and the switching control of the switching circuits 21a, 21b, and 22a to 22d is performed by the processing of the CPU 23a. However, the switching is performed by hardware without using the processing of the CPU 23a. You may make it implement switching control of the circuits 21a, 21b, and 22a-22d.

  Also, the load and the vehicle battery are connected via a plurality of different switching circuits connected in parallel, and the control unit is abnormal in power supply to the loads connected to the plurality of different switching means connected in parallel. When it is determined that the power supply to the load connected to the plurality of different switching circuits connected in parallel is normal, the control signal is output to the plurality of switching circuits connected in parallel so that the power supply to the load is normal. Thus, switching control of a plurality of switching means may be performed. According to such a configuration, backup by different switching means connected in parallel is possible, and reliability can be improved.

  Moreover, in the said embodiment, although the switching means was comprised using the electromagnetic relay, you may comprise a switching means using switching circuits other than an electromagnetic relay, for example, a semiconductor element etc.

  Moreover, in the said 1st Embodiment, the state which had the unlocking operation of the door in the parking state, the parking state, the state which completed unlocking of the door in the parking state, the state which started the auto cruise control in the traveling state and the traveling state The switching control of each switching circuit was performed according to various vehicle conditions, but the above-described vehicle condition is an example, and may be changed as appropriate according to the type and grade of the vehicle, the vehicle-mounted device mounted on the vehicle, etc. Can be applied.

  Further, in the above embodiment, the configuration in which each load is operated or stopped by power line communication is shown, but it is not always necessary to set each load to the operating state or stopped state by power line communication. A dedicated signal line is provided between the load that needs to be individually controlled to the operating state or the stopped state, and each load is individually controlled to the operating state or the stopped state via this dedicated signal line. May be.

  Moreover, in the said 1st Embodiment, although the control part and the switching circuit were stored in the same case, the junction which performs the concentrating of the wire harness connected to the some load mounted in the control part and the switching circuit in the vehicle You may arrange in a box.

  Moreover, in the said 1st Embodiment, although the control part and the switching circuit were stored in the same case, the junction box which concentrates the wire harness connected to the some load mounted in the vehicle for a case is arrange | positioned. It is also possible to adopt a structure that allows attachment to a certain position. The case can be easily attached to the vehicle as an alternative to the junction box by providing the case with a fixing portion similar to a fixing portion (for example, screw hole, fitting portion, etc.) for attaching the junction box to the existing vehicle. Is possible.

  Moreover, in the said embodiment, although the structure which sets each of load to an operation state or a stop state via power line communication was shown, the vehicle-mounted for connecting to the vehicle-mounted LAN connected to the some load in the control part, for example A LAN interface may be provided and connected to the in-vehicle LAN via the in-vehicle LAN interface, and each of the loads may be in an operating state or a stopped state.

  The correspondence between the configuration in the embodiment and the configuration in the claims will be described. The switching circuits 21a, 21b, 22a to 22d, 50 correspond to switching means, and S100, S104, S108, S112, S116, S122, S126, S130, and S134 correspond to information collecting means, and S102, S106, S110, S114, S118, S120, S124, S128, S132, and S136 correspond to switching control means.

DESCRIPTION OF SYMBOLS 1 Vehicle power supply apparatus 10 Vehicle battery 21a, 21b Switching circuit 22a-22d Switching circuit 23 Control part 23a CPU
23b Memory 23c Communication part 30 Body ECU
30a Door lock motor 31 Immobilizer ECU
32 Air conditioner ECU
33 Anti-lock brake system ECU
34 Engine ECU
35 Cruise ECU
35a Laser radar 40 Light 50 Switching circuit

Claims (14)

A vehicle power supply device that supplies power from a vehicle battery mounted on a vehicle to a plurality of loads mounted on the vehicle via a wire harness,
A plurality of switching means for switching the energized state or the interrupted state according to a control signal from the control unit,
Between the vehicle battery and the plurality of loads, connected to the network via the plurality of switching means and the wire harness,
The controller is
Information collecting means for collecting information for identifying a predetermined vehicle situation;
A predetermined vehicle situation is specified based on the information collected by the information collecting means, and is arranged between the load to be supplied with power and the vehicle battery according to the specified vehicle situation. The control means is output so that the switching means placed in a conducting state and the switching means disposed between the load to stop the supply of electric power and the vehicle battery are put in a shut-off state. And a switching control means for performing switching control of the switching means. The load is connected to the vehicle battery via a plurality of different switching means connected in parallel.
When the control unit determines that power supply to the load connected to the plurality of different switching units connected in parallel has become abnormal, the plurality of different switching units connected in parallel And switching control of the plurality of switching means by outputting the control signal to the plurality of different switching means connected in parallel so that power supply to the load connected to the power supply becomes normal. The vehicle power supply device according to claim 1. The control unit has a communication unit for performing power line communication using the wire harness as a communication line, and is capable of performing power line communication with the load via the communication unit.
The vehicular power supply apparatus according to claim 1, wherein the control unit puts each of the loads into an operating state or a stopped state through the power line communication.   4. The vehicle power supply device according to claim 3, wherein the information collection unit collects information for specifying the predetermined vehicle situation via the power line communication.   The switching control means acquires a condition for specifying the importance level of power supply to the load, and determines the power supply to the load based on the condition for specifying the importance level of power supply to the load. 5. The vehicular power according to claim 1, wherein priority is determined and switching control of the plurality of switching means is changed according to a priority of power supply to the load. Feeding device. The vehicle is equipped with a plurality of the vehicle batteries,
The vehicle switching device according to any one of claims 1 to 5, wherein the switching control unit performs switching control of the switching unit so as to average power supply amounts of the plurality of vehicle batteries. Power supply device.   When the switching control unit specifies that the vehicle is in a stopped state, the switching unit disposed between the load to which the power is to be supplied and the vehicle battery in a state in which the vehicle is stopped And outputting the control signal so that the switching means disposed between the load that should stop the supply of electric power and the vehicle battery in a state in which the vehicle has traveled is shut off. The vehicle power supply device according to any one of claims 1 to 6, wherein switching control of the means is performed.   When the switching control means specifies that the vehicle is traveling, the switching means is disposed between the vehicle battery and the load to which the electric power is to be supplied when the vehicle is traveling. The control signal is output so that the switching means arranged between the load to stop the supply of power and the vehicle battery in a state where the vehicle is stopped and the vehicle battery are shut off. The vehicle power supply device according to any one of claims 1 to 7, wherein switching control of the plurality of switching means is performed.   The switching control means is arranged between the load to be supplied with the electric power and the vehicle battery when the occupant is in the vehicle when the occupant is in the vehicle. The control signal is output so that the switching means disposed between the load to stop the supply of power and the vehicle battery is shut off in a situation where an occupant is in the vehicle. The vehicle power supply device according to any one of claims 1 to 8, wherein switching control of the plurality of switching means is performed.   The vehicle power supply device according to any one of claims 1 to 9, wherein the control unit and the switching unit are stored in the same case.   The vehicle power supply device according to claim 6, wherein at least one of the plurality of vehicle batteries is stored in the same case together with the control unit and the switching unit.   The case has a structure that allows attachment to a position where a junction box that collects the wire harness connected to the plurality of loads mounted on the vehicle is arranged. The vehicle power supply device according to claim 10 or 11.   The said control part and the said switching means are arrange | positioned in the junction box which collects the said wire harness connected to these load mounted in the said vehicle, Any one of Claim 1 thru | or 9 characterized by the above-mentioned. The vehicle power supply device according to claim 1.   The control unit has an in-vehicle LAN interface for connecting to the in-vehicle LAN connected to the plurality of loads, and is connected to the in-vehicle LAN through the in-vehicle LAN interface, and each load is operated or stopped. The vehicle power supply device according to claim 1, wherein the vehicle power supply device is in a state.

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