JP2003246246A - Vehicle-mounted power source monitoring apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To promote the suppression of the power consumption of mounted electric appliances in response to the degree of the reduction of an accumulated electricity residual amount to a driver or the like by automatically warning the reduction of the accumulated electricity residual amount of a battery 2 due to the power consumption of the mounted electric appliances 3d to 3f in response to the degree. <P>SOLUTION: In a vehicle, a vehicle-mounted power source-monitoring apparatus 1a is provided. The mounted power source-monitoring apparatus 1a has a poser source voltage detecting means 7 which detects the power source voltage Vin of the vehicle- mounted battery 2, a grade determination means 4, and a warning-notifying means (e.g. an automobile telephone set, a cellular phone or the like) 8. In this case, the grade determination means 4 determines a grade from among a plurality grades being set in advance, to which the power source voltage Vin being output from the means 7 and/or a reduction value ΔVin(=Vstan-Vin) from the reference voltage Vstan belongs. The warning-notifying means 8 transmits a warning message to promote the control (e.g. the turning-off of the power source) of the power consumption of the vehicle-mounted electric appliances as being set in advance in response to a determination result by the determination means 4. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle-mounted power supply monitoring device, and more particularly, to a vehicle-mounted power supply monitoring device for monitoring the remaining charge of the vehicle-mounted battery in order to prevent the battery from running down and issuing a warning prompting control of power consumption based on the monitoring result. Power supply monitoring device.

[0002]

2. Description of the Related Art Generally, an automobile is not only equipped with a motor for an engine starter, a lamp, an air conditioner, etc., an in-vehicle electric device which is indispensable for the operation of the engine, safe driving of the automobile, the environment inside the automobile, car audio equipment, car It is equipped with a variety of comfortable and convenient in-vehicle electrical devices such as navigation devices. The electric power for these on-vehicle electric devices is supplied by a power supply device including a generator (alternator) that operates with the operation of the engine and a battery (: secondary battery, for example, lead acid battery) charged by the generator. It

[0003]

By the way, when the automobile is in a normal running state, the on-vehicle battery is charged by the generator rotated by the operation of the engine, and the electric power consumption of the on-vehicle electric device of the automobile is somewhat high. However, the remaining charge of the battery does not decrease. However, at the time of traffic jam, stoppage, etc., there is a possibility that the amount of discharge to the in-vehicle electric device will be larger than the amount of charge of the battery generated by the generator. When the amount of discharge of the battery becomes larger than the amount of charge, the remaining amount of stored electricity naturally decreases. Further, the battery has a property that the remaining amount of stored electricity is small even if it does not consume electric power, that is, even if the vehicle is not used. Then, when the remaining amount of stored electricity falls below a certain level, the engine cannot be started, that is, the vehicle cannot run. This phenomenon is called "battery goes up."

Therefore, when the remaining charge of the battery becomes low, it is absolutely necessary to maintain the power supply of the on-vehicle electric equipment for starting, running, or for ensuring running safety (engine control system, night time). It can be said that it is preferable to reduce the power consumption and suppress the reduction of the remaining amount of stored electricity, except for the lighting devices etc. during traveling).

However, the driver who is required to drive safely can appropriately reduce the remaining charge amount by accurately determining the extent of the remaining charge amount, the current power consumption, the power consumption amount of each on-vehicle electric device, and the like. It is difficult to request even suppression. For example, it is quite complicated for the user to properly turn on / off the power supply of the onboard electric device in consideration of the power consumption (or current amount) of the onboard electric device at the time of operation, suspension, or automatic startup. However, too much nerve can lead to a traffic accident.

Further, even if the on-vehicle electric equipment to be used is selected and the power source is turned on and off by appropriately considering the power consumption, the remaining charge of the battery changes depending on the outside temperature and the state of the battery itself. It is necessary to select the on-vehicle electrical equipment to be used, turn on and off the power in consideration of the factor, but it is very complicated, and it is virtually impossible to demand such a thing from the driver. Is.

However, in the past, there has been no notification to the driver or the user of the degree of reduction in the remaining charge of the battery. Therefore, a so-called battery may run out. It is also possible that the battery is near the permissible limit while the vehicle is not used for a while, and the vehicle runs without noticing it, and the battery runs out on the way.

However, conventionally, no means has been taken to make the driver recognize the necessity of suppressing such excess current and consumption current. Therefore, the battery is likely to run out.

The present invention has been made to solve the above problems, and is intended to reduce the remaining charge of the battery due to the power consumption of the on-vehicle electric equipment, the power supply voltage of the battery or the current consumption of the on-vehicle electric equipment. It is possible to monitor the power consumption from the vehicle and automatically warn the driver according to the result of the monitoring to prompt the driver or the like to control the power consumption of the in-vehicle electric device according to the degree of reduction of the remaining charge amount. The purpose is to prevent the battery from running out.

[0010]

According to a first aspect of the present invention, there is provided an on-vehicle power supply monitoring device, a power source voltage detecting means for detecting a power source voltage of an on-vehicle battery, a power source voltage output from the power source voltage detecting means, and / or a reference thereof. Grade determination means for determining which of a plurality of preset grades the voltage drop value belongs to, and power consumption of the in-vehicle electric device as preset according to the determination result by the grade determination means It is characterized by having a warning reporting means for warning the control of.

Therefore, according to the on-vehicle power supply monitoring device of the first aspect, it is determined which grade the power supply voltage of the on-vehicle battery detected by the power supply voltage detecting means and / or the reduction value from the reference value belongs to which grade. The determination means detects and the warning notification means warns as preset according to the grade of the detection result. Therefore, the driver is prompted to control the power consumption of the on-vehicle electric equipment according to the warning. be able to.

[0012] Therefore, even if the remaining charge of the on-vehicle battery becomes small, the driver does not notice it and does not control the power consumption of the on-vehicle electric equipment, so that the remaining charge of the battery is reduced and eventually the battery is exhausted. It is possible to prevent the accident.

According to a second aspect of the present invention, there is provided a remaining capacity detecting means for detecting a remaining capacity from a consumed capacity consumed by at least a part of the on-vehicle electric equipment connected to the on-vehicle battery, and the remaining capacity. Grade judging means for judging which of a plurality of preset grades the remaining capacity detected by the capacity detecting means belongs to, and the on-vehicle electric equipment as preset according to the judgment result by the grade judging means Warning notification means for issuing a warning prompting control of power consumption of the device.

Therefore, according to the on-vehicle power supply monitoring device of the second aspect, the remaining capacity is monitored and a warning is given according to the grade of the remaining capacity. Therefore, the driver is informed of the power consumption of the on-vehicle electric equipment according to the warning. It is possible to prompt the driver to control, and eventually it is possible to make the driver notice that the remaining capacity of the vehicle-mounted battery is significantly reduced, and it is possible to prevent the battery from becoming dead. . That is, as the consumption capacity of the on-vehicle electric device increases, the remaining capacity decreases, so the total sum of the remaining capacity can be monitored and the degree of decrease in the remaining charge can be determined from that grade.
Based on the determination result, a warning corresponding to the degree of decrease can be issued.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION The first embodiment of the on-vehicle power supply monitoring device of the present invention is basically a power supply voltage detecting means for detecting a power supply voltage of an on-vehicle battery, and a power supply voltage output from the detecting means. Alternatively, a grade determination means for determining which one of a plurality of preset grades the drop value from the reference voltage belongs to, and the on-vehicle electrical equipment as preset according to the determination result by the grade determination means. It has a warning reporting means for warning the control of the power consumption of the device,
Examples of the warning reporting means include a car telephone device and a mobile phone.

The second on-vehicle power supply monitoring device of the present invention is
Basically, the remaining capacity is detected from the sum of the consumed capacities consumed by at least some of the in-vehicle electric devices,
The remaining capacity is classified into grades and a warning is given according to the grade. That is, when the grade of the remaining capacity changes, a warning corresponding to the content will be issued.

As the warning according to the degree of reduction in the remaining charge of the battery, there is also a warning for limiting the power consumption by defining an upper limit of power consumption for a predetermined on-vehicle electric device. For example, "If you are using a car audio device, lower the volume to less than half the maximum", for example, how many steps should be taken to reduce the power consumption of the backlight of a car navigation device using a liquid crystal display device as a display. When it is possible to switch the display brightness to another, a warning message such as "to lower the brightness of the display by one step" may be issued.

In the above grade setting mode, when the grades are classified according to the power supply voltage, the absolute value of the power supply voltage may be, for example, V1a (for example, 10 V) or less and V2a.
(For example, 4.5 V) or less and V3a (for example, 2.7 V) or less, and a mode in which the power supply voltage is reduced from a preset reference value (for example, 14 V) (reference value-current power supply voltage) Depending on the value, for example, V1r (eg 4V) or more, V2r (eg 9.5V) or more, V3r
(For example, 11.3V) or more, there is a mode in which grades are classified, and only one mode may be adopted or both modes may be adopted.

If only one of the modes is adopted, for example, when the absolute value of the first-grade power supply voltage V1a (for example, 10 V) or less, a warning for prompting the power-off of the car audio device is issued, and the second-grade absolute power supply voltage is absolute. Value V2a
When the voltage is 4.5V or lower, a warning is issued to also turn off the power of the car navigation device, and when the absolute value of the third-grade power supply voltage V3a is 2.7V or lower, a warning to turn off the power of the security system is also issued. An example is given.

Further, in this aspect, with respect to the decrease value of the power supply voltage from the reference value (for example, 14V), when the first grade V1r (4V) or more is prompted to turn off the power of the car audio device, the second grade V2r. There is also an example in which the power of the car navigation device is prompted to be turned off at (9.5 V) or higher, and the power of the security system is also turned off at the third grade (11.3 V) or higher.

Further, there is also a mode in which the grade to which the power supply voltage belongs is judged from both the absolute value of the power supply voltage and the decrease value from the reference value of the power supply voltage. In the first embodiment to be described later, the latter one of them is determined. Is adopted. Incidentally, V1
a, V2a, V3a, V1r, V2r, V3r, etc. have different appropriate values depending on the car audio device, car navigation device, security system model, etc., and V1a is 10V, V2a is 4.5V, and V3a is 2V. ．
7V, V1r is 4V, V2r is 9.5V, V3r is 1
1.3V is just an example until you get tired of it.

The setting of the grade when the decrease of the remaining capacity of the on-vehicle battery is monitored and warned from the consumed capacity is, for example, less than or equal to the remaining capacity comparison reference value (first remaining capacity comparison reference value) I1a with the remaining capacity Iin. (Or smaller)
If the remaining capacity is the first grade, and the remaining capacity comparison reference value (second remaining capacity comparison reference value) I2a or less (or smaller) that is appropriately smaller than that, the second grade, and the remaining When the remaining capacity is equal to or smaller than (or smaller than) the remaining capacity comparison reference value (third remaining capacity comparison reference value) I3a, which is appropriately smaller than the capacity comparison reference value I2, the third grade is performed.

Then, as the grade changes, such as the first grade and the second grade, warnings having different message contents are issued. Then, for example, when the car audio device is connected to the first output, the car navigation device is connected to the second output, and the security device is connected to the third output, the first remaining capacity comparison reference value I1.
The sum of the consumed capacities of the car audio device, the car navigation device and the security device is set as a, and the sum of the consumed capacities of the car navigation device and the security system is set as the second remaining capacity comparison reference value I2a. It is advisable to set the consumed capacity of the security device as the third remaining capacity comparison reference value I3a.

Therefore, if the car audio device has a consumed capacity of 5 Ah, the car navigation device has a consumed capacity of 3 Ah, and the security system has a consumed capacity of 1 Ah, for example, the first remaining capacity comparison reference value I1a is 9 Ah.
It can be said that it is preferable to set h, the second remaining capacity comparison reference value I2a to 4 Ah, and the third remaining capacity comparison reference value I3a to 1 Ah. However, since the in-vehicle electric devices such as car audio devices, car navigation devices, and security systems have different consumed capacities, the remaining capacity comparison reference values I1a, I2a, I3a, etc. must be changed accordingly. Therefore, I1a is 9Ah, I2a is 4Ah, I3
The fact that a is 1 Ah is just an example until tired.

[0025]

The present invention will be described in detail below with reference to the illustrated embodiments. 1 (A), (B) and FIG. 2 are for explaining a first embodiment of the in-vehicle power supply monitoring device of the present invention.
(A) is a schematic system diagram of an electric system in a vehicle, (B) is a schematic configuration diagram of an in-vehicle power supply monitoring device, and FIG. 2 is a flowchart showing an operation of the in-vehicle power supply monitoring device.

First, the electric system in the automobile will be described with reference to FIG. In the drawing, reference numeral 1a denotes an on-vehicle power supply monitoring device, which detects a power supply voltage of an on-vehicle battery 2 and gives a warning prompting to turn off the power to the on-vehicle electric devices 3d to 3f according to the detection result.

Reference numeral 3a is an on-vehicle electrical equipment (for example, a lamp), 3b is an engine control computer, 3c is a starter motor, and these supply a power supply voltage from the viewpoints of starting, running, and ensuring safe driving of the vehicle. Since it should not be restricted, the supply of the power supply voltage is not restricted by the operation of the driver or the like.

Of the on-vehicle electric devices 3d to 3e which are the targets of the warning for prompting the power-off by the on-vehicle power supply monitoring device 1a, 3
d is a car audio device, 3e is a car navigation device, 3f is a security system, and these devices 3d to 3
The order of importance is set among f, the security system 3f has the highest importance, the car navigation device 3e has the highest importance, and the car audio device 3d has the lowest importance.

This is because the car audio device 3d, the car navigation device 3e, and the security system 3f.
Of these, the security system 3f is the most important in terms of safety, and the car navigation device 3e has the second most important importance in terms of understanding the route to the destination and the current location.
This is because the car audio device 3d cannot be said to be absolutely indispensable for running, and therefore can be said to have the lowest importance among them.

Next, the configuration of the vehicle-mounted power supply monitoring device 1a will be described with reference to FIG. A CPU (central processing unit) 4 controls the inside of the vehicle-mounted power supply monitoring device 1a. 5 is RO
M (read only memory) stores a program executed by the CPU 4 and the like. A CPU 6 performs temporary storage necessary when the CPU 4 executes the program stored in the ROM 5.

An A / D 7 detects the output voltage (power supply voltage) of the vehicle-mounted battery 2 and converts it into a digital signal.
The converter inputs the output digital signal to the CPU 4, and corresponds to the power supply voltage detecting means in the claims. The output 1 is the car audio device 3
d, the output 2 is connected to the car navigation device 3e, and the output 3 is connected to the power supply line of the security system 3f.

Reference numeral 8 is a warning reporting means for issuing a warning wirelessly, 9 is a memory for storing the telephone number of a warning party of the warning constituting the warning reporting means 8, 10 is a transmitting / receiving section, and the base station from the warning reporting means 8 is wireless. To and from the base station. The warning notification means 8 may unilaterally wirelessly transmit a warning regarding the reduction of the remaining charge of the battery, but since the transmission state to the base station is formed, it is necessary to exchange a signal with the base station. , Reception is also necessary. 11
Is a transmitting / receiving antenna.

When the warning reporting means 8 stores the warning calling party telephone number in the memory 9 for storing the calling party calling party number, the power source voltage of the vehicle-mounted battery 2 detected by the A / D converter 7 is preset. When the specified warning becomes a required grade, a control signal is exchanged with the base station to form a transmittable state, and then a warning message preset according to the grade (for example, a voice message) To the telephone with the alert destination telephone number.

Next, the control operation executed by the CPU 4 will be described with reference to FIG. (1) “Detecting Voltage Level Vin” First, the power supply voltage Vin is detected. Specifically, A / D
The detection output of the converter 7 is fetched. (2) “Vin <V1a?” Next, the detected power supply voltage Vin is V1a (for example, 10
V) It is determined whether it is smaller than.

(3) “ΔVin> V1r?” When the determination result of the above step (2) is No (: N),
It is determined whether ΔVin is larger than V1r (for example, 4V). In addition, ΔVin is a decrease value (ΔVin = Vstan−V) of the power supply voltage Vin from the power supply voltage reference value Vstan (the maximum value of the power supply voltage of the vehicle-mounted battery 2, for example, 14V).
in). When Vin is equal to the reference value Vstan, ΔVin = 0V, and when Vin is 1V lower than the reference value, ΔVin = 1V.

(4) "Warning notification of output 1" When the determination result of step (2) or (3) is Y, the power supply voltage of the on-vehicle battery is the first grade,
A warning message prompting the power-off of the on-vehicle electric device connected to the output 1, that is, the car audio device is issued. The warning message preferably has a content, for example, "The remaining charge is low. Turn off the car audio device." This is the first stage of the warning regarding the reduction of the remaining charge of the battery 2. It can be said that the steps (2) and (3) are steps for determining whether the output voltage (power supply voltage) of the vehicle-mounted battery 2 is the first grade.

(5) "Vin <V2a?" When the determination result of step (3) is N or when step (4) is completed, the detected power supply voltage Vin is V2a.
(For example, 4.5 V) is determined. (6) “ΔVin> V2r?” When the determination result of step (5) is No (: N),
It is determined whether ΔVin is larger than V2r (for example, 9.5V).

(7) "Warning notification of output 2" When the determination result of step (5) or (6) is Y, the power supply voltage of the on-vehicle battery 2 is the second grade, and the on-vehicle electric power connected to the output 2 is A warning message prompting the power-off of the device, that is, the car navigation device is issued. The warning message is, for example, "The remaining battery charge is considerably low.
Also turn off the car navigation system. The content like " This is the second stage of the warning regarding the reduction of the remaining charge of the battery 2. It can be said that the steps (5) and (6) are steps for determining whether the output voltage (power supply voltage) of the vehicle-mounted battery 2 is the second grade.

(8) "Vin <V3a?" When the determination result of step (6) is N, or when step (7) is completed, the detected power supply voltage Vin is V3a.
(For example, 2.7 V) is determined. (9) “ΔVin> V3r?” When the determination result of step (8) is No (: N),
It is determined whether ΔVin is larger than V3r (for example, 11.3V). When the determination result is N, the process returns to step (1).

(10) "Warning notification of output 3" When the determination result of step (8) or (9) is Y, the power supply voltage of the on-vehicle battery is the third grade,
A warning message prompting the power-off of the vehicle-mounted electric device connected to the output 3, that is, the security system 3f is issued. The warning message has a good content, for example, "The remaining charge level has dropped considerably enough to warn you. Turn off the power of the security system device."
This is the third step of suppressing the reduction of the remaining charge of the battery 2, and is also the final step in this embodiment. It can be said that the above steps (8) and (9) are steps for determining whether the output voltage (power supply voltage) of the vehicle-mounted battery 2 is the third grade.

(11) "Stop operation" When step (10) is completed, the operation is stopped and the flow ends.

According to such an on-vehicle power supply monitoring device, from the power supply voltage Vin of the on-vehicle battery 2 detected by the A / D converter 7 which is the power supply voltage detecting means, the power supply voltage Vin and the reference value Vstan of the power supply voltage Vin. CPU 4 determines which grade the decrease value ΔVin (Vstan-Vin) from belongs to, and based on the determination result, a warning message corresponding to the grade is stored in the telephone number memory 9 for storing the telephone number of the telephone number. It is possible to transmit from the transmitting / receiving unit 10 via the antenna 11.

Therefore, if the driver has, for example, an automobile telephone or a mobile telephone, the warning message can be received in the form of a telephone, and if the power supply of the vehicle-mounted electric device 3 is turned off in accordance with the warning message, the vehicle-mounted electric device can be turned on. It is possible to suppress power consumption in the devices 3d to 3f. Therefore, when the remaining charge of the in-vehicle battery becomes small, it is urged to reduce the power consumption of the in-vehicle electric device to suppress the reduction of the remaining charge of the battery in accordance with the degree of the remaining charge. It can be prevented.

Although the warning reporting means 8 is of the automobile telephone system, the warning reporting means 8a of the portable telephone system may be used as shown in FIG. In this case, a warning destination telephone number is registered in advance, and further, a warning message by voice or e-mail corresponding to the grade to be issued each time when each grade to be warned is also registered, When a warning grade is reached, a warning message corresponding to the grade is automatically issued to the telephone having the telephone number.

By doing so, there is an advantage that the warning message can be issued by voice, or the warning message can be issued by e-mail using the Internet. In the figure, ICs are an analog front end circuit and a digital baseband circuit. The warning reporting means 8a does not exist because a speaker and a microphone are unnecessary. Further, the power supply voltage is received from the vehicle-mounted battery 2.

FIG. 4 shows a mobile phone type warning reporting means 8a.
It is a figure which shows one warning example by an electronic mail at the time of using. 20 is a mobile phone that the driver has,
21 is a display. The message in FIG. 4 warns that the battery level of the car is low and that the engine needs to be started within 2 days. When the driver does not use the car by phone or e-mail. It is possible to recognize a decrease in the remaining charge of the battery 2.

By doing so, for example, the number of grades which was only up to the third grade in the above embodiment,
This can be achieved by increasing the number to have the fourth grade or higher and issuing such a warning message in the fourth or higher specific grade.

5 and 6 are for explaining the second embodiment 1b of the on-vehicle power supply monitoring device of the present invention. FIG. 5 is a schematic configuration diagram of the on-vehicle power supply monitoring device, and FIG. 6 is on-vehicle power supply monitoring device 1.
It is a flow chart which shows operation of b. The electric system in the vehicle in this embodiment is substantially the same as that shown in FIG.

In the drawings, the on-vehicle power supply monitoring device 1b shown in FIG. 5 is different from the on-vehicle power supply monitoring device 1 shown in FIG. Instead, it has a capacity meter 17, and the total capacity consumed by some of the vehicle-mounted electric devices 3a to 3f 3d to 3f is measured by the capacity meter 17. However, it is common in all other respects. The warning reporting means may be of the automobile telephone device type 8 as in the first embodiment of FIG. 1 or may be of the mobile telephone device type 8a of FIG.

Next, the control operation executed by the CPU 4 will be described with reference to FIG. (21) "Detection of Remaining Capacity Iin" First, the CPU 4 takes in the output of the capacity meter 17 which detects the sum of the capacities consumed by the in-vehicle electric devices 3d to 3f. The remaining capacity Iin is obtained from the consumed capacity measured by the capacity meter 17.

(22) "Iin <I1a?" Next, it is determined whether or not the detected remaining capacity Iin is smaller than (or below) the first remaining capacity comparison reference value I1a. The first remaining capacity comparison reference value I1a is set to, for example, the sum of the consumed capacities of the vehicle-mounted electric devices 3d to 3f connected to the outputs 1, 2 and 3. Therefore, the in-vehicle electric device (car audio device) 3d consumes, for example, 5 Ah, the in-vehicle electric device (car navigation device) 3e consumes, for example, 3 Ah, in-vehicle electric device (security system).
If the consumption capacity of 3f is 1 Ah, for example, the first remaining capacity comparison reference value I1a is set to 9 Ah. Of course, since the in-vehicle electric device 3 has different consumption capacities depending on the model, the remaining capacity comparison reference value I1a must be changed accordingly.

(23) "First-stage warning notification" If the determination result of step (22) is Y, a message of the first-stage warning content is transmitted. For example,
A message with a warning content such as "The battery capacity is low, please turn off the car audio device." Is sent. (24) “Iin <I2a?” When the determination result of step (22) is N or when step (23) is completed, the detected remaining capacity Iin is the second value.
It is determined whether or not the current remaining capacity comparison reference value I2a is less than. The second remaining capacity comparison reference value I2a is set to, for example, the sum of the consumed capacities of the on-vehicle electrical equipment (car navigation device) 3e and the on-vehicle electrical equipment (security system) 3f connected to the outputs 2 and 3 (for example, 4 Ah). To do.

(25) "Second-stage warning notification" If the determination result of step (24) is Y, a message of the second-stage warning content is transmitted. For example,
A message with a warning content, such as "The battery capacity is low, please turn off the car audio device and the car navigation device." Is sent. (26) “Iin <I3a?” When step (25) is completed or step (2
When the determination result of 4) is N, the detected remaining capacity Iin
Is smaller than the third remaining capacity comparison reference value I3a. The third remaining capacity comparison reference value I3a is the in-vehicle electric device (security system) 3f connected to the output 3.
Is set to the consumed capacity (for example, 1 Ah). Step (2
If the determination result in 6) is N, the process returns to step (21).

(27) "Third-stage warning notification" If the judgment result of the step (26) is Y, a message of the third-stage warning content is transmitted. For example,
A warning message such as "The battery capacity is low, please turn off all power to the car audio device, car navigation device and security system" is sent. (28) "Operation stop" When step (27) is completed, the operation is stopped and the flow is ended.

According to such an on-vehicle power supply monitoring device, the remaining capacity obtained from the sum of the consumed capacities of the car audio device 3d, the car navigation device 3e and the security system 3f is monitored, and which grade (I1a, I2a,
The CPU 4 determines whether it belongs to I3a), and sends a warning message corresponding to the determination result wirelessly from the warning notification means 8 (or 8a), so that the driver may receive a warning by a telephone, for example, a mobile telephone. If the power of the on-vehicle electric devices 3d to 3f is turned off in accordance with the warning, the power consumption capacity of the on-vehicle electric devices can be reduced and the reduction of the remaining capacity can be suppressed.
It is possible to prevent the battery from running out.

It should be noted that not only the warning message for prompting the power-off of the on-vehicle electric devices 3d, 3e, etc. but also the warning for prompting the reduction of the power consumption capacity thereof, for example, "Please lower the volume". You may send a message. For example, although the maximum audio output of the car audio device 3d varies depending on the model, it rises to several tens of watts, the consumed capacity becomes very large when the volume is maximized, and the remaining capacity of the vehicle-mounted battery 2 drops rapidly. Therefore, when the remaining capacity of the vehicle-mounted battery 2 becomes small, a warning is issued to lower the upper limit of the power consumption, which prompts the reduction of the consumed capacity.

A car navigation device 3e or the like having a liquid crystal display, which has a consumption capacity mode such as a normal mode or a low consumption capacity mode, and is capable of mode switching, is set to the low consumption capacity mode. A warning message prompting may be issued. In the low power consumption mode, the screen of the liquid crystal display becomes slightly dark, but the display is visible, and the power consumption can be reduced. According to this, there is no need to suddenly turn off the power supply of an on-vehicle electric device such as the car navigation device 3e or the car audio device 3d from a certain stage, and the volume or the brightness of the display is gradually changed. As a result, it is possible to more finely suppress the reduction of the remaining capacity of the vehicle-mounted battery 2.

[0058]

According to the on-vehicle power supply monitoring device of the first aspect,
The grade determination means detects to which grade the power supply voltage of the vehicle-mounted battery detected by the power supply voltage detection means and / or a reduction value thereof from a reference value belongs,
Since the warning notification means gives a warning as preset according to the grade of the detection result, it is possible to prompt the driver to control the power consumption of the on-vehicle electric device according to the warning. Therefore, even if the remaining charge of the in-vehicle battery becomes low, the driver does not notice it and does not control the power consumption of the in-vehicle electric device, which reduces the remaining charge and eventually causes the battery to run out. Can be prevented in advance.

According to the on-vehicle power supply monitoring device of the second aspect, the remaining capacity is monitored and a warning is given according to the grade of the remaining capacity, so that the driver controls the power consumption of the on-vehicle electric equipment according to the warning. Therefore, the driver can be made aware that the remaining capacity of the vehicle-mounted battery is significantly reduced, and it is possible to prevent the battery from becoming dead.

According to the on-vehicle power supply monitoring device of the third aspect, the warning for prompting the control of the power consumption is for prompting the power-off of the on-vehicle electrical equipment. Each time the power is turned off, it can be expected to reduce the power consumption or the current consumption of the vehicle-mounted battery by the power consumption or the current consumption, and it is possible to prevent the battery from running out.

According to the on-vehicle power supply monitoring device of the fourth aspect, the warning prompting the control of the power consumption prompts the reduction of the power consumption. Therefore, it is necessary to immediately turn off the power of the on-vehicle electrical device from a certain stage. However, it is possible to urge that the volume or the brightness of the display is changed step by step or continuously so that it is possible to more finely suppress the reduction of the remaining charge of the in-vehicle battery. .

According to the on-vehicle power supply monitoring device of the fifth aspect, since the communication warning means emits a warning by radio which can be received by the radio receiver, the driver or the like can be transmitted through a normal telephone, a car telephone or a mobile telephone. You can receive a warning message. Therefore, the driver can control the power consumption of the in-vehicle electric device according to the warning message to suppress the power consumption in the vehicle and suppress the reduction of the remaining amount of the stored electricity, which in turn can prevent the battery from running out. .

[Brief description of drawings]

1A and 1B show a first embodiment of an in-vehicle power supply monitoring device of the present invention, in which FIG. 1A is a schematic system diagram of an electric system in a vehicle, and FIG. It is a schematic block diagram of an apparatus.

FIG. 2 is a flowchart showing the operation of the first embodiment.

FIG. 3 is a circuit block diagram showing a schematic configuration of another example (mobile phone) of the warning reporting means.

FIG. 4 is a front view showing a mobile phone that has received one warning message.

FIG. 5 is a schematic configuration diagram of a second embodiment of the in-vehicle power supply monitoring device of the present invention.

FIG. 6 is a flowchart showing the operation of the second embodiment of the vehicle-mounted power supply monitoring device of the present invention.

[Explanation of symbols]

1a, 1b ... In-vehicle power supply monitoring device, 2 ... In-vehicle battery, 3d-3f ... In-vehicle electrical equipment, 3d ... Car audio device, 3e ... Car navigation device,
3f ... Security system, 4 ... Grade determination means (CPU), 7 ... Power supply voltage detection means (A / D)
Converter), 17 ... Capacity meter, 8, 8a ... Warning reporting means.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) G08B 21/00 G08B 21/00 C H02J 7/00 H02J 7/00 N 302 302D F term (reference) 2G016 CA03 CB12 CC04 CC06 CC07 CC16 CC27 CC28 CE03 CE07 CE31 5C086 AA32 BA22 CA02 CB27 DA06 DA08 EA08 EA15 EA41 EA45 FA18 5G003 BA01 DA13 EA05 GC05

Claims (5)

[Claims] 1. A power supply voltage detecting means for detecting a power supply voltage of an in-vehicle battery, and a plurality of grades in which a power supply voltage output from the power supply voltage detecting means and / or a reduction value thereof from a reference voltage are preset. A grade determination means for determining which the vehicle belongs to, and a warning notification means for issuing a warning prompting control of power consumption of the on-vehicle electric device as preset according to the determination result by the grade determination means An in-vehicle power supply monitoring device characterized in that 2. A remaining capacity detecting means for detecting a remaining capacity from a consumed capacity consumed by at least a part of the on-vehicle electric equipment connected to the on-vehicle battery, and a remaining capacity detected by the remaining capacity detecting means. Grade judging means for judging which of a plurality of preset grades the capacity belongs to, and urging control of power consumption of the on-vehicle electric equipment as preset according to the judgment result by the grade judging means An in-vehicle power supply monitoring device comprising: a warning reporting means for issuing a warning. 3. The in-vehicle power supply monitoring device according to claim 1, wherein the warning prompting the control of the power consumption prompts the power-off of the in-vehicle electrical device. 4. The in-vehicle power supply monitoring device according to claim 1, wherein the warning for prompting control of power consumption is for prompting reduction of power consumption. 5. The in-vehicle power supply monitoring device according to claim 1, wherein the warning notification means issues a warning by radio that can be received by a radio receiver.