JP2002240656A - Power source monitor device for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily monitor charging condition and exhausted condition of a battery for an automobile in the vehicle. SOLUTION: Charging condition and exhausted condition of the battery is judged by displaying a mean voltage of the battery in the normal condition and displaying a differential voltage between the mean voltage and a battery voltage when an electrical load is applied. A driver can grasp the charging condition with the normal driving and the exhausted condition of the battery by flashing a passing light.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automobile power supply monitoring apparatus for monitoring the state of charge and fatigue of an automobile battery from a driver's seat. 2. Description of the Related Art Conventionally, in order to monitor the power supply system of an automobile, a CHG warning lamp device which detects the presence or absence of power generation by a generator and notifies the driver only when the power generation is stopped is generally used. A few vehicles display battery voltage, but do not indicate whether they are normal or abnormal. In addition, there is no device that detects and displays the battery fatigue state. [0003] Since the fatigue state of the battery is not known and the battery is not replaced in advance,
There was a problem that the engine could not be started on a cold morning. Further, since recent automobiles are equipped with a large number of electronic devices, the battery gradually rises during nighttime running, and there is also a problem that running becomes unstable. According to the present invention, a battery voltage (A) is constantly detected, and an average voltage (B) for a time period of about several seconds is calculated and stored. The difference voltage (C) between the voltage (A) of the battery and the average voltage (B) when an electric load is applied such as lighting of a passing light is calculated, and the difference voltage (C) is calculated.
Is used to determine and display the fatigue state of the battery according to the level, and prompt the driver to replace the battery in advance, thereby solving the above problem. FIG. 1 is a front view of the present invention, in which a front panel 1 is fitted with a transparent acrylic window 2, and various indications are provided on each of them. FIG. 2 is a side view showing the front panel 1, the case 3, and the power jack 6. FIG. 3 is a sectional view, in which a printed board 4 is fixed between the front panel 1 and the case 3 with screws 5. FIG. 4 is a view in which the front panel 1 is removed, and light-emitting diodes 7 to 22 are mounted on the printed board 4. Light emitting diodes 7 to 15 are for charging system display, and 7 and 15 are red, 8, 9, and 14 are yellow, and 10, 11, 12, and 13 are green. Light emitting diodes 16 to 22 are for battery display, 16 is red, 17, 18 are yellow, and 19, 20, 21, 22 are green. In addition, on the printed board 4, a CPU 23, a regulator IC 24, an air temperature detection thermistor 25, and necessary components (not shown) are mounted. FIG. 5 shows a connecting device between the device of the present invention and a vehicle, in which a power plug 26 and a car plug 27 are connected by an electric wire 28. During use, the power plug 26 is inserted into the power jack 6 and the car plug 28 is inserted into a cigarette lighter socket of the vehicle. FIG. 6 is a block diagram of the device of the present invention. The battery voltage of the power jack 6 is divided by a resistor 29, a resistor 30, and a quarter, and is input to the CPU 23 as a voltage signal. The battery voltage is adjusted to 5 V by the regulator IC 24. A temperature signal is input to the CPU 23 by the thermistor 25 and the resistor 31. The CPU 23 outputs the voltage signal for 0.05 second to 0.
A battery voltage (A) is created by sampling every second. The CPU 23 integrates and averages 10 to 20 battery voltages (A) to generate an average voltage (B). The CPU 23 calculates a difference between the battery voltage (A) and the average voltage (B) to generate a difference voltage (C). The average voltage (B) is the driving circuit 3
2 are displayed on the light emitting diodes 7 to 15. The difference voltage (C) is applied to the light emitting diodes 16 through
22 is displayed. When the temperature is low, the CPU 23 limits the output of the difference voltage (C) so that the light emitting diodes 16 to 22 do not emit light when the temperature is low. This is to prevent erroneous display because the difference voltage (C) increases when the temperature of the battery is low. The usage of the device of the present invention will be described.
The driver connects the device of the present invention to the cigar lighter of the vehicle using the connecting device. First, set the ignition key to the accessory position, wait a few seconds, and confirm that the charging system indicator lights up. If green lights up, it is OK. Next, the passing light blinks. At that time, if the battery indicator lights in the green range, the battery is OK. This time, the same operation is performed with the engine turned on. Similarly, if green is lit, it is OK. If the charging system display lights up in yellow or red, the generator or the charging regulator may be abnormal, and if the battery display lights up in yellow or red, the battery may be fatigued. Another Embodiment 1 FIG. 7 shows another embodiment 1 in which the present invention is incorporated in an automobile. Engine control and body control E
The CU 34 supplies a battery voltage signal 35, a passing light signal 36, a headlight signal 37, and an engine coolant temperature signal 38.
The above operation is performed by the CPU of the ECU 34, and the CHG lamp 40 of the vehicle is turned on via the diode 39 only when the battery display is turned on in yellow or red, thereby causing the driver to feel fatigued. Another Embodiment 2 An embodiment in which a battery is used alone will be described. First, the device of the present invention is connected to a battery by a connecting device (not shown) having an alligator clip attached to the other end of the power plug 26. Then, the terminals 43 and 44 of the shunt resistance device 42 incorporating the resistance (about 0.4 ohm) 41 of FIG. 8 are brought into contact with the plus and minus terminals of the battery. If the display of the device of the present invention lights green, the battery is OK. A pilot lamp 45 is connected between the terminal 43 and the terminal 44 of the device 42 so that contact can be confirmed. The distance L between the terminal 43 and the terminal 44 is a small battery (Example 26B1).
The terminal interval can be covered from about 8 type) to about the medium size battery (eg 55D23 type). According to the present invention, the display of the average voltage of the battery in the normal state and the difference voltage between the average voltage and the battery voltage when an electric load is applied are displayed to thereby determine the state of charge of the battery. This is to determine the fatigue state. The driver can know the fatigue state of the battery only by flashing the passing light, and can appropriately replace the battery, thereby preventing running troubles of the vehicle and saving resources.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of the appearance of the present invention. FIG. 2 is a side view of the appearance of the present invention. Body control E
A battery voltage signal 35, a passing light signal 36, a headlight signal 37, an engine water temperature signal 38, and the like are input to the CU 34, and the above operation is performed by the CPU of the ECU 34. The diode 39 is provided only when the display is lit in yellow or red.
To turn on the CHG lamp 40 of the vehicle. Another Embodiment 2 An embodiment in which a battery is used alone will be described. First, the device of the present invention is connected to a battery by a connection device (not shown) having an alligator clip attached to the other end of the power plug 26. Then, the terminals 43 and 44 of the shunt resistance device 42 incorporating the resistance (about 0.4 ohm) 41 of FIG. 8 are brought into contact with the plus and minus terminals of the battery. If the display of the device of the present invention lights green, the battery is OK. In the device 42, a pilot lamp is connected between the terminals 43 and 44 so that contact can be confirmed. Terminal 43
The distance L between the terminal and the terminal 44 is a small battery (Example 26B18).
Terminal) to a medium-sized battery (eg 55D23 type). According to the present invention, the display of the average voltage of a battery in a normal state, and the difference between the average voltage and the battery voltage when an electric load is applied are displayed, whereby the state of charge of the battery is determined. This is to determine the fatigue state. The driver can know the fatigue state of the battery only by flashing the passing light, and can appropriately replace the battery, thereby preventing running troubles of the vehicle and saving resources. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of the appearance of the present invention. FIG. 2 is a side view of the appearance of the present invention. FIG. 3 is a cross-sectional view of the present invention. FIG. 4 is a view showing a state in which a front panel of the present invention is removed. FIG. 5 shows an instrument for connecting the present invention to a vehicle. FIG. 6 is a block diagram of the present invention. FIG. 7 is a block diagram of another embodiment 1 of the present invention. FIG. 3 is a cross-sectional view of the present invention. FIG. 4 is a view showing a state in which a front panel of the present invention is removed. FIG. 5 is a view of a device for connecting the present invention to a vehicle. FIG. 6 is a block diagram of the present invention. FIG. 7 is a block diagram of another embodiment 1 of the present invention. FIG. 8 is a sectional view of a shunt resistance device according to another embodiment 2 of the present invention. [Description of Signs] 1; front panel 2; transparent acrylic plate 3; case
4; printed board 5; screw 6; power jack 7 to 15; charging system display light emitting diode 16 to 22; battery display light emitting diode 2
3; CPU 24; regulator IC 25; thermistors 26 to 28; vehicle connecting devices 29, 30, 31; resistors 32, 33; drive circuit 34;
To 38; various input signals 39; diode 40; CH
G lamps 41 to 45; shunt resistance devices and parts

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[Procedure for Amendment] [Date of Submission] June 18, 2001 (2001.6.1)
8) [Procedure amendment 1] [Document name to be amended] Description [Item name to be amended] Detailed description of the invention [Amendment method] Change [Details of amendment] [Detailed description of the invention] BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle power supply monitoring device for monitoring the state of charge and fatigue of a battery of a vehicle from a driver's seat. 2. Description of the Related Art Conventionally, in order to monitor the power supply system of an automobile, a CHG warning lamp device which detects the presence or absence of power generation by a generator and notifies the driver only when the power generation is stopped is generally used. A few vehicles display battery voltage, but do not indicate whether they are normal or abnormal. In addition, there is no device that detects and displays the battery fatigue state. [0003] Since the fatigue state of the battery is not known and the battery is not replaced in advance,
There was a problem that the engine could not be started on a cold morning. Further, since recent automobiles are equipped with a large number of electronic devices, the battery gradually rises during nighttime running, and there is also a problem that running becomes unstable. According to the present invention, a battery voltage (A) is constantly detected, and an average voltage (B) for a time period of about several seconds is calculated and stored. The difference voltage (C) between the voltage (A) of the battery and the average voltage (B) when an electric load is applied such as lighting of a passing light is calculated, and the difference voltage (C) is calculated.
Is used to determine and display the fatigue state of the battery according to the level, and prompt the driver to replace the battery in advance, thereby solving the above problem. FIG. 1 is a front view of the present invention, in which a front panel 1 is fitted with a transparent acrylic window 2, and various indications are provided on each of them. FIG. 2 is a side view showing the front panel 1, the case 3, and the power jack 6. FIG. 3 is a sectional view, in which a printed board 4 is fixed between the front panel 1 and the case 3 with screws 5. FIG. 4 is a view in which the front panel 1 is removed, and light-emitting diodes 7 to 22 are mounted on the printed board 4. Light emitting diodes 7 to 15 are for charging system display, and 7 and 15 are red, 8, 9, and 14 are yellow, and 10, 11, 12, and 13 are green. Light emitting diodes 16 to 22 are for battery display, 16 is red, 17, 18 are yellow, and 19, 20, 21, 22 are green. In addition, on the printed board 4, a CPU 23, a regulator IC 24, an air temperature detection thermistor 25, and necessary components (not shown) are mounted. FIG. 5 shows a connecting device between the device of the present invention and a vehicle, in which a power plug 26 and a car plug 27 are connected by an electric wire 28. During use, the power plug 26 is inserted into the power jack 6 and the car plug 28 is inserted into a cigarette lighter socket of the vehicle. FIG. 6 is a block diagram of the device of the present invention. The battery voltage of the power jack 6 is divided by a resistor 29, a resistor 30, and a quarter, and is input to the CPU 23 as a voltage signal. The battery voltage is adjusted to 5 V by the regulator IC 24. A temperature signal is input to the CPU 23 by the thermistor 25 and the resistor 31. The CPU 23 outputs the voltage signal for 0.05 second to 0.
A battery voltage (A) is created by sampling every second. The CPU 23 integrates and averages 10 to 20 battery voltages (A) to generate an average voltage (B). The CPU 23 calculates a difference between the battery voltage (A) and the average voltage (B) to generate a difference voltage (C). The average voltage (B) is the driving circuit 3
2 are displayed on the light emitting diodes 7 to 15. The difference voltage (C) is applied to the light emitting diodes 16 through
22 is displayed. When the temperature is low, the CPU 23 limits the output of the difference voltage (C) so that the light emitting diodes 16 to 22 do not emit light when the temperature is low. This is to prevent erroneous display because the difference voltage (C) increases when the temperature of the battery is low. The usage of the device of the present invention will be described.
The driver connects the device of the present invention to the cigar lighter of the vehicle using the connecting device. First, set the ignition key to the accessory position, wait a few seconds, and confirm that the charging system indicator lights up. If green lights up, it is OK. Next, the passing light is blinked. At that time, if the battery indicator lights in the green range, the battery is OK. This time, the same operation is performed with the engine turned on. Similarly, if green is lit, it is OK. If the charging system display lights up in yellow or red, the generator or the charging regulator may be abnormal, and if the battery display lights up in yellow or red, the battery may be fatigued. Another Embodiment 1 FIG. 7 shows another embodiment 1 in which the present invention is incorporated in an automobile. Engine control and body control E
The CU 34 supplies a battery voltage signal 35, a passing light signal 36, a headlight signal 37, and an engine coolant temperature signal 38.
The above operation is performed by the CPU of the ECU 34, and the CHG lamp 40 of the vehicle is turned on via the diode 39 only when the battery display is turned on in yellow or red, thereby causing the driver to feel fatigued. Another Embodiment 2 An embodiment in which a battery is used alone will be described. First, the device of the present invention is connected to a battery by a connection device (not shown) having an alligator clip attached to the other end of the power plug 26. Then, the terminals 43 and 44 of the shunt resistance device 42 incorporating the resistance (about 0.4 ohm) 41 of FIG. 8 are brought into contact with the plus and minus terminals of the battery. If the display of the device of the present invention lights green, the battery is OK. A pilot lamp 45 is connected between the terminal 43 and the terminal 44 of the device 42 so that contact can be confirmed. The distance L between the terminal 43 and the terminal 44 is a small battery (Example 26B1).
The terminal interval can be covered from about 8 type) to about the medium size battery (eg 55D23 type). According to the present invention, the display of the average voltage of a battery in a normal state, and the difference between the average voltage and the battery voltage when an electric load is applied are displayed, whereby the state of charge of the battery is determined. This is to determine the fatigue state. The driver can know the fatigue state of the battery only by flashing the passing light, and can appropriately replace the battery, thereby preventing running troubles of the vehicle and saving resources. [Procedure amendment 2] [Document name to be amended] Description [Item name to be amended] Brief description of drawings [Correction method] Change [Contents of amendment] [Brief description of drawings] [Fig. FIG. FIG. 2 is a side view of the appearance of the present invention. FIG. 3 is a cross-sectional view of the present invention. FIG. 4 is a view showing a state in which a front panel of the present invention is removed. FIG. 5 is a view of a device for connecting the present invention to a vehicle. FIG. 6 is a block diagram of the present invention. FIG. 7 is a block diagram of another embodiment 1 of the present invention. FIG. 8 is a sectional view of a shunt resistance device according to another embodiment 2 of the present invention. [Description of Signs] 1; Front panel 2; Transparent acrylic plate 3; Case 4; Printed board 5; Screw 6; Power jacks 7 to 15; Light emitting diodes 16 to 22 for charging system display;
CPU 24; regulator IC 25; thermistors 26 to 28;
31; resistors 32 and 33; drive circuit 34; control ECUs 35 to 38; various input signals 39;
Diode 40; CHG lamps 41 to 45;

Claims (1)

Claims: 1. A device for detecting a voltage (A) of a battery of an automobile, a device for calculating a voltage (B) by averaging the voltage (A), and the voltage of the battery is instantaneously changed by an electric load. The difference voltage (C) between the voltage (A) when the voltage drops and the average voltage (B)
A power supply monitoring device for a vehicle, comprising: a device for calculating {= (A)-(B)}; and a device for judging a fatigue state of a battery from the level of a difference voltage (C) and informing a driver of the condition. 2. A display device in which the average voltage (B) and the differential voltage (C) are constituted by light emitting diodes or pointer type meters of three colors, a normal voltage range is green, a caution voltage range is yellow, and a malfunction is caused. The power supply monitoring device for an automobile according to claim 1, wherein the voltage range is displayed in red. 3. The vehicle according to claim 1, wherein the green, yellow, and red levels of the difference voltage (C) are used as voltages for lighting a headlamp or passing a light switch. Power monitoring device. 4. A power supply monitoring device for an automobile according to claim 3, wherein the voltage of the battery is detected from an outlet of a cigarette lighter in the vehicle. 5. An automobile power supply monitoring apparatus according to claim 1, wherein an engine water temperature, a vehicle interior temperature, and the like are detected to limit the display of said difference voltage (C). . 6. The detected voltage is sampled at intervals of about 0.1 second, an average of 10 to 20 of the sampled voltages is used as an average voltage of the battery, and the sampling voltage is used as an instantaneous voltage. And a vehicle power supply monitoring device according to claim 4.