JP4963904B2 - In-vehicle system and power supply control device - Google Patents

Description

  The present invention relates to an in-vehicle system including a plurality of connection devices connected by a power supply line for supplying power from a power source and a signal line for transmitting a signal, and a plurality of power loads connected to the connection device by a power supply line. In particular, the present invention relates to a power supply control device used in the vehicle-mounted system, and particularly to a vehicle-mounted system and a power supply control device that suppresses power consumption while maintaining convenience.

  In recent years, the number of electrical components such as electronic control units (ECUs), which are power loads mounted on vehicles, has been increasing due to various advantages such as safety, convenience, comfort and product power. As the number of electrical components increases, the amount of power consumed not only while driving but also when parked is increasing. In addition, with the diversification of life in recent years, there has been a great diversification of requirements for the usage methods of vehicles and further the usage methods of electrical components while riding.

Patent Document 1 discloses a technique for supplying power to individual electrical components regardless of the position of a key switch (ignition switch).
JP-A-5-139220

  However, each electrical component is pre-set to operate depending on the position of the ignition switch, so power will be supplied not only to the desired electrical component but also to unnecessary electrical components. There is a problem that leads to. Depending on the power consumption state, there is a risk that the remaining amount of power of the lead storage battery mounted as a power source in the vehicle becomes less than the minimum necessary power required for starting the engine.

  Since the technique for supplying power to each electrical component disclosed in Patent Document 1 is a technique that assumes an operation check of the electrical component on the assembly line of the vehicle, an abnormality related to the remaining amount of power is not considered. Therefore, even if the technique disclosed in Patent Document 1 is applied to a vehicle that is generally used, there is a possibility that the power supply of individual electrical components causes an abnormality in which the remaining amount of power is less than the minimum required power. is there.

When the power source is a lead-acid battery, the power of the power source is charged by the operation of the vehicle engine, and it is possible to prevent the remaining amount of the power source from being less than the minimum required power. When the engine is started in a stopped state, there is a problem that it adversely affects the natural environment and the residential environment, such as emission of exhaust gas such as CO ₂ and NO _x , and generation of noise. As a specific example, the number of vehicles parked and parked around the cram school to transfer children to the cram school is increasing, and parents who ride in each vehicle are equipped with electrical equipment such as televisions, audio equipment, and air conditioners. When the engine is operated to operate the engine, exhaust gas and engine noise are generated, and a social problem in which the living environment of surrounding residents deteriorates can be raised.

  The present invention has been made in view of such circumstances, and a plurality of connection devices such as junction boxes used for connection of a power supply line and a signal line are connected to each connection device by a signal line, and then to a power load. A power supply control device that controls the power supply of the vehicle is disposed in the vehicle, and the power supply control device determines whether power can be supplied and then determines whether power can be supplied to the power load. In-vehicle system that prevents the consumption of electricity and prevents the remaining amount of power from becoming less than the minimum required power, and further prevents adverse effects on the natural environment and the residential environment, and power supply used in the in-vehicle system The purpose is to provide a control device.

An in-vehicle system according to the present invention includes a plurality of connection devices connected by a power supply line for supplying power from a power source and a signal line for transmitting a signal, and a plurality of power loads connected to the connection device by a power supply line. In an in-vehicle system comprising: an individual power supply request unit that requests power supply to one power load connected to any one of the connection devices to the connection device connected to the power load; and each connection A power supply control device that controls power supply to the power load by connecting to the device with a signal line, and the connection device requests determination of whether power supply is possible or not when receiving a power supply request from the individual power supply request unit Means for transmitting a determination request signal to the power supply control device, the power supply control device, with respect to the received determination request signal, a determination means for determining whether power supply is possible, and a determination result signal indicating the determination result, Judgment request signal And means for transmitting to the transmission source of the connection device, the connection device, when the determination result received the determination result signal is a feed-friendly, characterized by further comprising means for supplying power to a power load.
The in-vehicle system according to claim 1, further comprising means for collectively supplying / interrupting power to a plurality of power loads connected to one connection device. .

  In the present invention, since the power supply control device determines whether individual power supply to the power load is possible or not, power can be supplied only to the necessary power load and when it is determined that power supply is possible. Power consumption can be prevented, and unlimited power supply is not permitted, so that it is possible to prevent the remaining amount of power from being less than the minimum required power.

Vehicle system according to the present invention, the pre-Symbol power supply control device further comprises means for obtaining the status of the power related to feeding, the determining means, based on the quantity of electricity supplied to the determined power state and power load, It is configured to determine whether or not power supply is possible. When the determination result indicates that power supply is possible, the power supply time is calculated based on the acquired power supply state and the amount of electricity supplied to the power load. It is characterized by being.

  In the present invention, based on the current power consumption, the integrated value of the supplied power, the state of power supply such as the remaining amount, and the amount of electricity such as the amount of power supplied to the power load, When the situation is calculated with high accuracy and it is determined that power supply is possible, it is possible to realize high-accuracy power management by calculating the power supply time.

Vehicle system according to the present invention, the pre-Symbol power supply control device, the determination unit, when it is determined that the power supply not, and characterized by further comprising means for outputting a notification signal indicating the power supply not to a predetermined power load To do.

  In the present invention, the passenger can grasp the state of the power source by outputting a notification signal to a predetermined power load such as an LED or a liquid crystal panel.

The power supply control device according to the present invention is connected to a power supply line that supplies power from a power source to a vehicle-mounted power load and a plurality of connection devices that are connected by a signal line that transmits a signal, and supplies power to the power load. And a means for receiving a determination request signal for requesting determination of whether or not power can be supplied to one power load from the connection device, and whether or not power supply is possible for the received determination request signal. And a means for transmitting a determination result signal indicating a result of the determination to a connection device that is a transmission source of the determination request signal.

  In the present invention, by determining whether or not individual power supply to the power load connected to the connection device is possible, power can be supplied only to the necessary power load and when power supply is determined to be possible. Power consumption can be prevented, and unlimited power supply is not permitted, so that it is possible to prevent the remaining amount of power from being less than the minimum required power.

  An in-vehicle system and a power supply control device according to the present invention include a plurality of connection devices such as a junction box connected to a power supply line that supplies power and a signal line that transmits a signal, and a plurality of connection devices connected to the connection device via a power supply line. A power supply, an individual power supply request unit that requests power supply to one power load connected to the connection device to the connection device to which the power load is connected, and a power supply control device that controls power supply to the power load Are arranged in the vehicle. Then, in response to the power supply request from the individual power supply request unit, the connection device transmits a determination request signal for determining whether or not power supply is possible to the power supply control device. In response to the received determination request signal, the power supply control device determines whether power supply is possible, and transmits a determination result signal indicating the determined result to the connection device. Supply power to the load.

With this configuration, according to the present invention, power can be supplied only to a necessary power load when it is determined that power can be supplied. Therefore, it is possible to prevent consumption of power more than necessary, and power can be supplied indefinitely. Since it does not permit, it is possible to prevent the remaining amount of the power source from being less than the minimum required power, and so on. In the present invention, since it is possible to prevent the consumption of electric power more than necessary, it is not necessary to charge the power source by operating the vehicle engine when parking or stopping, so that exhaust gases such as CO ₂ and NO _x are discharged. It has excellent effects such as being able to prevent adverse effects on the natural environment and the residential environment such as noise generation.

  In addition, the present invention acquires the current power consumption, the integrated value of the supplied power, the state related to the power supply such as the remaining amount, and the acquired power state and the amount of electricity such as the amount of power supplied to the power load. Based on this, it is possible to calculate the power consumption consumed by the power supply with high accuracy and to calculate the power supply time when it is determined that power supply is possible. Has an effect.

  Furthermore, according to the present invention, when the power supply control device determines that power supply is not possible, the passenger can grasp the state of the power supply by outputting a notification signal to a predetermined power load such as an LED or a liquid crystal panel. Etc. have excellent effects.

  And in this invention, although comprised so that a some connection apparatus may be used, compared with the case where one connection apparatus is used, it can respond easily to the increase in electric power load, and electric power load When the communication process is performed, various mechanisms related to the communication process are started in connection device units, so that it is possible to suppress the power consumption, and the excellent effects are obtained.

  Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof. FIG. 1 is a block diagram illustrating a configuration example of an in-vehicle system according to the present invention. In FIG. 1, reference numeral 1 denotes a vehicle. The vehicle 1 is equipped with a plurality of connection devices 2, 2,... Such as a junction box, a relay box, and a fuse box that relay and distribute DC power and communication signals. Each of the connection devices 2, 2,... Is connected by a power supply line that supplies power and a signal line that transmits a signal. 1 shows a configuration example in which connecting devices 2, 2,... Are arranged in the front engine room, in the vicinity of the driver's seat, in the vicinity of the front passenger seat, and in the rear trunk room in the vehicle 1, respectively. Each of the connection devices 2, 2,... Has one or a plurality of power loads 3, 3,... That are configured by electrical components such as an electronic control unit (ECU) with a power supply line and a signal line. It is connected. One power load 3 here does not necessarily correspond to one electrical component, and one power load 3 may be constituted by a plurality of interlocked electrical components. That is, one power load 3 indicates one or a series of interlocking electrical components. Further, a power supply control device 4 of the present invention that controls power supply to the power loads 3, 3,... Is connected to the connection devices 2, 2,.

  The connection device 2 disposed in the engine room is connected to a power source 5 using a lead storage battery for supplying DC power by a power supply line, and further, a voltmeter, a current for detecting the remaining power of the power source 5 A power sensor 5 a such as a meter or a hydrometer is attached, and the power sensor 5 a is connected to the connection device 2 through a signal line. In addition, various power loads 3, 3,... Such as a front right headlight are connected to the connection device 2 disposed in the engine room.

  The connection device 2 disposed in the vicinity of the driver's seat includes various mechanisms related to the driver's side door such as a power window mechanism, a door lock mechanism, and a door mirror mechanism, and a power remaining amount display monitor that indicates the remaining amount of the power source 5. Various power loads 3, 3,... Such as various instrument mechanisms, an external power feeding mechanism such as an ACC socket, an audio visual related mechanism, and a navigation mechanism are connected. Further, individual power supply switches (individual power supply request units) 6, 6,... Such as pushbuttons for individually operating the respective power loads 3, 3,... Connected to the connection device 2 disposed in the vicinity of the driver's seat are disposed. In addition, a display unit such as an LED or a liquid crystal monitor for notifying the driver that the operation by the individual power supply switches 6, 6,.

  The connection device 2 disposed in the vicinity of the front passenger seat includes various mechanisms related to the front passenger side door such as a front left headlight, an illumination mechanism such as a room light, a power window mechanism, a door lock mechanism, and a door mirror mechanism. .. Are connected. Further, individual power supply switches 6, 6,... For individually operating the respective power loads 3, 3,... Connected to the connection device 2 disposed in the vicinity of the passenger seat are disposed.

  The connection device 2 disposed in the trunk room includes an illumination mechanism such as a rear light, a power window mechanism, a door lock mechanism, various mechanisms related to a door on the passenger side such as a door mirror mechanism, and a television disposed in a rear seat. Various power loads 3, 3,... Such as an audio visual mechanism are connected. Further, individual power supply switches 6, 6,... For individually operating the power loads 3, 3,... Connected to the connection device 2 disposed in the trunk room are disposed.

  A detection mechanism 7 that detects the position of the ignition switch is connected to the power supply control device 4. Note that the detection mechanism 7 may be connected to the connection device 2 disposed in the vicinity of the driver's seat instead of being connected to the power supply control device 4.

  Next, the configuration of various devices will be described. FIG. 2 is a block diagram showing a configuration example of the connection device 2 used in the in-vehicle system of the present invention. The connection device 2 includes a first connection mechanism 21 that accommodates a signal transmission / reception circuit and a power supply circuit, and a second connection mechanism 22 that accommodates a power supply line for constant power supply and a fuse incorporated in the power supply line.

  The first connection mechanism 21 includes contact / separation means 210 including a transmission / reception circuit and a power supply circuit. The contact / separation means 210 is a control means 211 such as a microcomputer that controls transmission / reception of signals using the transmission / reception circuit and contact / separation by the power supply circuit. And a recording means 212 such as an EEPROM for recording various data used for the control of the control means 211.

  The connection device 2 transmits power to the other connection devices 2, 2,... And the power supply control device 4 from the power source 5 directly or via other connection devices 2, 2,. The power supply line L2, the other connection devices 2, 2,..., The signal line L3 that transmits and receives signals to and from the power supply control device 4, the power supply lines L4, L4,. , 6,... Are connected to various feed lines and signal lines such as signal lines L5, L5,... The connecting device 2 and the power load 3 may be connected by a power supply line and a signal line, and a signal from the individual power supply switch 5 may be received via the signal line.

  In the recording means 212, as information required for control of the control means 211, information required for transmission / reception of signals, and each power load 3, 3,... Associated with identification information identifying each power load 3, 3,. Various kinds of information such as information on the power supply is recorded. Information on power supply to each power load 3, 3,..., Information indicating power consumption of each power load 3, 3,..., Contact / separation (on / off) with each power load 3, 3,. Information such as information indicating the power supply state is given.

  FIG. 3 is a block diagram illustrating a configuration example of the power supply control device 4 used in the in-vehicle system of the present invention. The power supply control device 4 includes a connection mechanism 41 that accommodates a signal transmission / reception circuit and a power supply circuit, a power supply control mechanism 42 that controls power supply to each of the power loads 3, 3,..., And outputs from LEDs, liquid crystal panels, speakers, and the like. Part 43.

  The connection mechanism 41 includes contact / separation means 410 including a transmission / reception circuit and a power supply circuit, and the contact / separation means 410 includes control means 411 such as a microcomputer that controls transmission / reception of signals using the transmission / reception circuit and contact / separation by the power supply circuit; And recording means 412 such as an EEPROM for recording various data used for control of the control means 411.

  The contact / separation means 410 detects a feed line L2 that receives power through the connection devices 2, 2,..., A signal line L3 that transmits and receives signals to and from the connection devices 2, 2,..., And a position signal that indicates the position of the ignition switch. Various power supply lines such as a signal line L6 received from the mechanism 7 and signal lines are connected.

  In the recording means 412, as information required for control by the control means 411, information required for signal transmission / reception, and each power load 3, 3,... Associated with identification information for identifying each power load 3, 3,. Various kinds of information such as information on the power supply is recorded. Information on power supply to each power load 3, 3,..., Information indicating power consumption of each power load 3, 3,..., Contact / separation (on / off) with each power load 3, 3,. Information such as information indicating the power supply state can be given.

  The power supply control mechanism 42 includes a control unit 420 that controls power supply to the power loads 3, 3,... And a recording unit 421 that records various programs and data required for the control of the control unit 420. The recording means 421 includes a remaining amount of power of the power supply 5 received from the power sensor 5a via the signal line L3, an integrated value of the power supplied to each power load 3, 3,. Information such as the state and power consumption of each power load 3, 3,... Is recorded.

  Next, processing of various devices used in the in-vehicle system according to the present invention will be described. FIG. 4 is a flowchart illustrating an example of the power supply control process of the connection device 2 and the power supply control device 4 included in the in-vehicle system of the present invention. When the passenger boarding the vehicle 1 wishes to supply power only to the unpowered power load 3 when the ignition switch is in the OFF (OFF) position or the accessory (ACC) position, the power load 3 A power supply request is made by operating the individual power supply switch 6 that supplies power only to the power supply. For example, when the ignition switch is in the off position and the user desires to supply power to the television disposed in the rear seat, the passenger presses the individual power supply switch 6 that requests power supply only to the power load 3. Perform the operation.

  The individual power supply switch 6 receives a passenger's operation and sends a power supply request signal for requesting power supply to only the corresponding power load 3 to the connected connection device 2.

  The connection device 2 receives a power supply request signal under the control of the control unit 211 (step S1), and receives a determination request signal for requesting whether power supply to the power load 3 requested by the received power supply request signal is possible. Then, it transmits to the power feeding control device 4 (step S2). The determination request signal transmitted in step S2 includes the identification information of the power load 3 recorded in the recording unit 212 and information indicating the power consumption.

  The power supply control device 4 receives the determination request signal under the control of the control unit 411 (step S3), and acquires the power consumption state in the connection devices 2, 2,... Based on the control of the control unit 420 (step S3). S4), a state relating to the remaining amount of the power source 5 is acquired from the power sensor 5a (step S5).

  In step S4, the power consumption status of the connection devices 2, 2,... Acquired is the current consumption supplied to each connected power load 3, 3,. It is an integrated value of the electric energy and the supplied electric energy, and is acquired from each electric power load 3, 3,. In step S <b> 5, the acquired power consumption state is, for example, the current power consumption and the integrated value of the supplied power, and is recorded in the recording unit 421. The power supply control device 4 can recognize the current power consumption amount from the total value of the power amount currently supplied to each power load 3, 3,. The total amount of supplied power can be recognized from the integrated value of the amount of power supplied to each power load 3, 3,. Further, in step S5, the state relating to the remaining amount of the power source 5 to be acquired is, for example, a measured value of voltage, current, specific gravity, or the like obtained by directly measuring the power source 5, or a value obtained by converting the measured value into a predetermined index. The acquisition of the consumption status in step S4 and the state of the power source 5 in step S5 are separately acquired and recorded in the recording unit 421, and read from the recording unit 421 at the timings of step S4 and step S5. Also good.

  And the electric power feeding control apparatus 4 determines the propriety of electric power feeding based on the state of the power supply 5 and the electric energy supplied to the electric power load 3 by control of the control means 420 (step S6), and when it determines with electric power feeding being possible (step) (S6: YES), the supply time is calculated based on the state of the power source 5 and the amount of power supplied to the power load 3 (step S7).

  In step S6, the state of the power source 5 is the remaining amount of power of the power source 5 calculated from the various information acquired in steps S4 to S5, and the amount of power supplied to the power load 3 requests power supply. This is the amount of power to be supplied to the power load 3 being recorded, and is recorded in the recording means 421 in advance. Moreover, the power consumption in the case where supply of electric power is permitted can be predicted from the information acquired in steps S4 to S5 and the electric power to be supplied to the power load 3. Then, the total amount of power that can be supplied to the power load 3 is calculated with respect to the remaining amount of power of the power source 5 and the predicted power consumption, and the calculated power amount and the power consumption per unit time of the power load 3 Are compared to determine whether or not power supply is possible, and when power supply is permitted, the power supply time is calculated by dividing the total amount of power that can be supplied by the power consumption per unit time. Note that it is possible to determine whether or not to supply power and calculate the supply time by using an amount of electricity such as current instead of electric power.

  Then, under the control of the control unit 411 and the control unit 420, the power supply control device 4 transmits a determination result signal indicating whether power supply is possible and the power supply time to the connection device 2 that is the transmission source of the determination request signal (step S8).

  The connection device 2 receives the determination result signal under the control of the control unit 211 (step S9), determines whether or not the determination result indicated by the received determination result signal is feedable (step S10), When it is determined that power supply is possible (step S10: YES), power supply to the power load 3 related to the individual power supply switch 6 that is the transmission source of the power supply request signal is performed with the power supply time indicated by the determination result signal as an upper limit. Start (step S11). In addition, when the time after starting the electric power feeding to the electric power load 3 reaches the upper limit time, the electric power feeding to the electric power load 3 is stopped. Further, when power supply is stopped, the passenger may be notified from the output unit 43 of the power supply control device 4 by a method such as turning on a warning light, displaying a message, or outputting a predetermined warning sound. Further, for example, an output unit such as an LED, a liquid crystal monitor, and a speaker is provided in the connection device 2, and boarding is performed by performing predetermined outputs such as lighting of a warning lamp, display of a message, and output of a warning sound from the output unit. Notification may be made to the person.

  In step S6, when it is determined that power feeding is not possible (step S6: NO), the power feeding control device 4 outputs predetermined warning outputs such as lighting of a warning lamp indicating that power feeding is not possible, displaying a message, and outputting a warning sound. (Step S12), the process proceeds to Step S8, and a determination result signal indicating whether power supply is possible is transmitted to the connection device 2 that is the transmission source of the determination request signal (Step S8). In addition, when the output part is arrange | positioned at the connection apparatus 2 to which the electric power load 3 is connected, you may make it perform a predetermined | prescribed warning output from the output part.

  In Step S10, when it is determined that the determination result indicated by the received determination result signal cannot supply power (Step S10: NO), power is supplied to the power load 3 related to the individual power supply switch 6 that is the transmission source of the power supply request signal. Ends the process without starting. However, even if the determination result is that power supply is not possible, when a predetermined emergency operation such as long pressing of the individual power supply switch 6 is performed, power supply to the power load 3 is started regardless of the determination result. For example, when an abnormal situation occurs such that the door cannot be opened due to some kind of trouble, even if the power of the power source 5 is exhausted, the power load 3 that is a power window mechanism must be supplied, and the power window must be opened to escape from the vehicle. This is because the occurrence of a state where it is not possible is considered.

  In the above-described embodiment, a configuration in which one power supply control device is provided has been described. However, the present invention is not limited to this, and a plurality of power supply control devices may be provided.

  The number, arrangement, and other various conditions of the various devices shown in the above embodiment are merely examples, and can be appropriately designed according to various factors such as the vehicle and the system configuration.

It is a block diagram which shows the structural example of the vehicle-mounted system of this invention. It is a block diagram which shows the structural example of the connection apparatus used with the vehicle-mounted system of this invention. It is a block diagram which shows the structural example of the electric power feeding control apparatus used with the vehicle-mounted system of this invention. It is a flowchart which shows an example of the electric power feeding control process of the connection apparatus and electric power feeding control apparatus with which the vehicle-mounted system of this invention is provided.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Connection apparatus 3 Electric power load 4 Feed control apparatus 5 Power supply 6 Individual feed switch

Claims (5)

In an in-vehicle system comprising a plurality of connection devices connected by a power supply line for supplying power from a power source and a signal line for transmitting a signal, and a plurality of power loads connected to the connection device by a power supply line,
An individual power supply requesting unit that requests power supply to one power load connected to any of the connection devices to the connection device connected to the power load;
A power supply control device connected to each of the connection devices via a signal line and controlling power supply to the power load,
The connecting device is
When a request for power supply is received from the individual power supply request unit, the unit includes a means for transmitting a determination request signal requesting determination of whether power supply is possible to the power supply control device,
The power supply control device
A determination means for determining whether or not power supply is possible with respect to the received determination request signal;
Means for transmitting a determination result signal indicating the determination result to the connection device that is the transmission source of the determination request signal,
The connecting device is
An in-vehicle system, further comprising means for supplying power to a power load when a determination result signal indicating that the determination result indicates that power can be supplied is received. The in-vehicle system according to claim 1, further comprising means for collectively supplying / cutting off power to a plurality of power loads connected to one connection device. The power supply control device
A means for obtaining a state of a power supply related to power supply;
The determination means is configured to determine whether or not power supply is possible based on the acquired power supply state and the amount of electricity supplied to the power load.
When the determination result is powered-friendly, based on the state and quantity of electricity supplied to power load of the acquired power, characterized in that are configured so as to calculate the power supply time claim 1 or claim 2 The in-vehicle system described in 1. 4. The power supply control device according to claim 1, further comprising means for outputting a notification signal indicating that power supply is not possible to a predetermined power load when the determination means determines that power supply is not possible . The vehicle-mounted system in any one . A power supply control device for controlling power supply to a power load by connecting with a power supply line for supplying power from a power source to a vehicle-mounted power load and a plurality of connection devices connected by a signal line for transmitting signals. ,
Means for receiving, from the connection device, a determination request signal for requesting determination of whether or not power can be supplied to one power load;
Means for determining whether or not power supply is possible in response to the received determination request signal;
A power supply control device comprising: a determination result signal indicating a determination result to a connection device that is a transmission source of the determination request signal.

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