JP2014046722A - Vehicle battery monitoring system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle battery monitoring system that reduces erroneous determination on theft of a vehicle.SOLUTION: A vehicle battery monitoring system (a monitoring system 20) includes a monitoring unit 21 that monitors an electric state (for example, a voltage V or current A) of a first battery 2 (a vehicle battery) with which a power plant 4 of a vehicle 100 can be started, and a power supply that is a second battery 23 which feeds power to the monitoring unit 21. Based on a result of monitoring by the monitoring unit 21 (for example, the voltage V of the first battery 2 and/or the current A of the first battery 2), the monitoring unit 21 determines whether the vehicle 100 has been thieved.

Description

  The present invention relates to a system (vehicle battery monitoring system) for monitoring a battery provided in a vehicle.

  A vehicle such as an automobile includes electric components such as a head ride and a car security device, and these electric components can be operated by being supplied with electric power from a vehicle battery. For example, FIG. 2 of Patent Document 1 discloses a car security device 2, and according to the description of paragraph [0045] of Patent Document 1, the car security device 2 normally receives power from the main power supply 11 (vehicle battery). On the other hand, when the power from the main power supply 11 is not supplied, the power from the rechargeable battery 13 (auxiliary power supply) is supplied via the power supply switching unit 12.

JP 2008-279939 A

  The vehicle battery can start the vehicle prime mover and is therefore an important part. However, as described above, the vehicle battery can supply power to various electrical components, and the remaining amount of the vehicle battery is reduced depending on the operating status (usage status) of the electrical components. When the remaining amount of the vehicle battery is low, the vehicle prime mover cannot be started. In other words, the vehicle battery rises depending on the operating status (usage status) of the electrical component.

  According to the description in paragraph [0041] of Patent Document 1, vibration is detected by the sensor 3. However, when determining whether or not a vehicle has been stolen based on the presence or absence of vibration, for example, when a cat rides on the hood, vibration occurs, and the vehicle is stolen by mistake even when the vehicle is not actually stolen. Sometimes it is judged. In particular, if it is erroneously determined that the vehicle is stolen at night, the alarm sound causes trouble for neighbors.

  One object of the present invention is to provide a vehicle battery monitoring system that reduces erroneous determinations related to vehicle theft. Other objects of the present invention will become apparent to those skilled in the art by referring to the aspects and preferred embodiments exemplified below and the accompanying drawings.

  In the following, in order to easily understand the outline of the present invention, embodiments according to the present invention will be exemplified.

According to a first aspect of the present invention, a monitoring unit that monitors an electrical state of a first battery capable of starting a prime mover of a vehicle;
A power supply unit that is a second battery for supplying power to the monitoring unit;
With
The monitoring unit relates to a vehicle battery monitoring system that determines whether the vehicle has been stolen based on a monitoring result of the monitoring unit.

  The monitoring unit can monitor the electrical state such as the voltage and current of the first battery capable of starting the prime mover of the vehicle. For example, an electrical component may be used illegally and the first battery may be consumed. Further, if the vehicle is illegally moved without operating the prime mover, the influence of ACG is not reflected on the state of the first battery. Thus, when the vehicle is stolen or after it is stolen, an abnormality occurs in the electrical state such as the voltage and current of the first battery. Therefore, the monitoring unit can monitor the electrical state such as the voltage and current of the first battery that can start the prime mover of the vehicle, and the monitoring result of the monitoring unit (the voltage of the first battery and / or the first Based on the battery current), it can be determined whether the vehicle has been stolen. In other words, the monitoring unit can determine that the vehicle has been stolen when the voltage and / or current of the first battery shows a predetermined pattern. In addition, the monitoring unit that monitors the electrical state of the first battery or the vehicle theft is not supplied with power from the first battery that can start the prime mover of the vehicle, and is different from the first battery. Power from the battery is supplied. Therefore, when monitoring the voltage of the first battery or the presence or absence of theft of the vehicle, the second battery can suppress a decrease in the remaining amount of the first battery.

  In the first aspect, when the prime mover is stopped, the monitoring unit determines whether the rate of decrease in the voltage of the first battery as the electrical state is greater than a predetermined rate, and / or It may be monitored whether the current consumption rate of the first battery as the electrical state is larger than a predetermined consumption rate.

  When a vehicle is stolen, the theft can enter the room illegally and start the prime mover illegally. Since the thief does not have the vehicle key, it takes time to start the unauthorized prime mover. In addition, when a theft person steals an electrical component (part of a vehicle) such as an audio device, it takes time to remove the electrical component. At this time, the time during which the room lamp is turned on becomes longer with the unauthorized entry into the room. Therefore, in such a situation, the rate of decrease in the voltage of the first battery and / or the rate of consumption of the current in the first battery is increased. The monitoring unit can monitor whether or not the vehicle is stolen through the rate of decrease in voltage of the first battery and / or the rate of consumption of current in the first battery.

  In the first aspect, when the vehicle is moving, the monitoring unit determines whether a fluctuation range of the voltage of the first battery as the electrical state in a predetermined period is smaller than a predetermined fluctuation range, And / or it may monitor whether the charge amount of the current of the first battery as the electrical state in a predetermined period is smaller than a predetermined charge amount.

  When a vehicle is stolen, the theft may pull the vehicle with a tow truck without starting the prime mover. When the prime mover does not operate, ACG does not generate electricity. Accordingly, in such a situation, the fluctuation range of the voltage of the first battery and / or the charge amount of the current of the first battery does not increase. The monitoring unit can monitor whether or not the vehicle is stolen through the fluctuation range of the voltage of the first battery and / or the charge amount of the current of the first battery.

  In the first aspect, when the vehicle is stolen, the monitoring unit may discharge the first battery.

  When the first battery is discharged, the voltage or remaining amount of the first battery is reduced. Therefore, in this situation, the prime mover can no longer be started with the first battery. The prime mover cannot be started, and the vehicle itself can be prevented from being stolen.

In the first aspect, the vehicle battery monitoring system includes:
When the said vehicle is stolen, you may further provide the interruption | blocking part which interrupts | blocks the electric power supplied to an electrical component from a said 1st battery.

  When the power supplied to the electrical component is cut off, the prime mover can no longer be started. The prime mover cannot be started, and the vehicle itself can be prevented from being stolen.

In the first aspect, the vehicle battery monitoring system includes:
You may further provide the alerting | reporting part which alert | reports the monitoring result of the said monitoring part to a user.

  Since the notification unit can notify the user of the monitoring result (the voltage of the first battery and / or the current of the first battery), the user can determine whether the monitoring result represents theft of the vehicle by the user himself / herself. Can be confirmed. In other words, since the monitoring unit may erroneously determine the vehicle theft, for example, when it is clear that the vehicle is not stolen, the user can cancel the erroneous determination. Alternatively, if it is clear that the vehicle has been stolen, the user can confirm the theft of the vehicle.

  Those skilled in the art will readily understand that the illustrated embodiments according to the present invention can be further modified without departing from the spirit of the present invention.

The structural example of the vehicle battery monitoring system according to this invention is shown. 1 shows an example of a schematic functional block diagram of a monitoring device according to the present invention. An example of the explanatory view of the relation between the remaining amount of the vehicle battery and the voltage is shown. An example of the time change of the remaining amount of the vehicle battery is shown. The other structural example of the vehicle battery monitoring system according to this invention is shown. An example of another schematic functional block diagram of the monitoring apparatus according to the present invention is shown.

  The preferred embodiments described below are used to facilitate an understanding of the present invention. Accordingly, those skilled in the art should note that the present invention is not unduly limited by the embodiments described below.

  FIG. 1 shows a configuration example of a vehicle battery monitoring system according to the present invention. In the example of FIG. 1, the vehicle battery monitoring system monitors a first battery 2 (vehicle battery) provided in the vehicle 100 and includes, for example, a monitoring device 20. In other words, the vehicle battery monitoring system includes at least the monitoring device 20 and can also include, for example, the first battery 2. The vehicle battery monitoring system may further include electrical components such as the headlight 11.

  In the example of FIG. 1, the monitoring device 20 is installed at the node P2 on the constant power supply line + B. However, the monitoring device 20 can be set at any node on the constant power supply line + B. You may install in the node P1 near the base of + terminal (positive electrode) of 1 battery 2. As will be described later, the monitoring device 20 or the vehicle battery monitoring system constantly monitors the electrical state on the power supply line + B, that is, the electrical state (voltage) of the first battery 2, and the monitoring device 20 or the vehicle that is a security device. The battery monitoring system also monitors whether the vehicle 100 has been stolen.

  In the example of FIG. 1, a vehicle 100 is, for example, an automobile, and the automobile has an engine room that stores a prime mover 4 that is an internal combustion engine such as a gasoline engine, and a room that stores a driver's seat, for example. The first battery 2 is disposed on the engine room side, and the negative terminal (negative electrode) of the first battery 2 is grounded to the vehicle body 1. The + terminal (positive electrode) of the first battery 2 constitutes the starting point of the constant power supply line + B, and is connected or wired to, for example, the main fuse box 6 via the node P1 on the constant power supply line + B. The constant power supply line + B branches off before the main fuse box 6 and is connected to, for example, an ACG (alternating current generator) 3. The ACG 3 can generate alternating current with the operation or rotation of the prime mover 4, and can charge the first battery 2 with direct current converted from the alternating current.

  The main fuse box 6 has a main fuse (not shown) connected to the node P1 on the constant power supply line + B. The constant power supply line + B branches in the main fuse box 6 and a plurality of branched constant power supplies Each of the lines + B is connected to electrical components such as the headlight 11 and the starter 5 through a sub fuse (not shown) in the main fuse box 6. The main fuse box 6 has a relay (not shown) that always connects or disconnects the power supply line + B to the electrical component via the sub fuse. For example, the headlight 11 is turned on when the switch 8 is ON, while the switch 8 In the OFF state, the headlight 11 is turned off. Further, the constant power supply line + B from the main fuse box is directly connected to the indoor fuse box 10 disposed on the indoor side, and is connected to the indoor fuse box 10 via the ignition switch 9.

  The indoor fuse box 10 has a plurality of fuses (not shown), and the constant power line + B is branched in the indoor fuse box 10, and each of the branched constant power lines + B is in the indoor fuse box 10. And connected to an electrical component such as the monitoring device 20 via a fuse. The constant power line + B from the main fuse box is converted into the accessory power line ACC by the ignition switch 9, and the accessory power line ACC branches in the indoor fuse box 10, and each of the branched accessory power lines ACC is The indoor fuse box 10 is connected to an electrical component such as an audio device (not shown) via a fuse. For example, an audio device connected to the accessory power supply line ACC is activated when the ignition switch 9 is in an ON state or an ACC state, while the operation of the audio device is stopped when the ignition switch 9 is in an OFF state.

  In addition, the starter 5 operates in the START state of the ignition switch 9, the prime mover 4 starts, and thereafter, the prime mover 4 operates or rotates as long as the ignition switch 9 is maintained in the ON state. When the remaining amount of the first battery 2 is small, the first battery 2 cannot start the prime mover 4 of the vehicle 100 with the starter 5. In other words, for example, when the prime mover 4 is stopped and the ACG 3 does not generate power, the first battery 2 is raised by continuous lighting of the headlight 11.

  The monitoring device 20 constituting the vehicle battery monitoring system is installed at, for example, the node P2 on the constant power line + B, but the monitoring device 20 only monitors the electrical state on the constant power line + B. The electric power from the first battery 2 is not supplied via the constant power line + B. The monitoring device 20 is supplied with power from the second battery 23 of FIG. Since the first battery 2 (vehicle battery) is an important part that enables the prime mover 4 to start, the monitoring device 20 not only monitors the vehicle 100 for theft, but incidentally, A decrease in the remaining amount of the battery 2 may be suppressed.

  FIG. 2 shows an example of a schematic functional block diagram of the monitoring device 20 according to the present invention. In the example of FIG. 2, the monitoring device 20 configuring the vehicle battery monitoring system includes a monitoring unit 21 that constantly monitors the electrical state on the power supply line + B, that is, the electrical state of the first battery 2. The monitoring device 20 or the vehicle battery monitoring system includes not only the monitoring unit 21 but also a power supply unit. This power supply unit is not the first battery 2 (vehicle battery) in FIG. 1 but the second battery 23 in FIG. (Spare battery). The power supply unit that is the second battery 23 can supply power to the monitoring unit 21. Therefore, when the monitoring unit 21 monitors the electrical state of the first battery 2, the second battery 23 can suppress a decrease in the remaining amount of the first battery 2.

  The monitoring unit 21 monitors the voltage V of the first battery 2 (for example, the node P2 on the constant power supply line + B) as the electrical state of the first battery 2. In particular, when the prime mover 4 is stopped, the voltage V or remaining amount of the first battery 2 is determined by the receiver of the keyless entry system (not shown), the electronic control unit (not shown) for controlling the prime mover 4, etc. It is reduced by the dark current of the electrical equipment. The monitoring unit 21 can additionally monitor whether or not the prime mover 4 can be started with the current voltage V or the remaining amount of the first battery 2. At this time, the monitoring unit 21 can grasp the accurate remaining amount of the first battery 2 by using the stable voltage V of the first battery 2 after the prime mover 4 is stopped. An operation example of the monitoring unit 21 will be described later.

  The monitoring device 20 or the vehicle battery monitoring system includes a switching unit 22 that can connect the first battery 2 and the second battery 23 in parallel, a notification unit 24 that notifies a user of a monitoring result of the monitoring unit 21, and a prime mover. 4, a vibration sensor 25 that detects vibration of 4, and a blocking unit 26 that blocks power supplied from the first battery 2 to the electrical component. Examples of operations of the switching unit 22, the notification unit 24, the vibration sensor 25, and the blocking unit 26 will be described later. Note that the power supply unit that is the second battery 23 can supply power to the switching unit 22, the notification unit 24, the vibration sensor 25, and the cutoff unit 26. Therefore, when the switching unit 22, the notification unit 24, the vibration sensor 25, and the blocking unit 26 are operated, the second battery 23 can suppress a decrease in the remaining amount of the first battery 2. The monitoring device 20 can include a movement sensor 25 that detects the movement of the vehicle 100 instead of or in addition to the vibration sensor 25. In other words, the sensor 25 may constitute a security device only with a vibration sensor, may constitute a security device with a vibration sensor and a movement sensor, or may constitute a security device with only a movement sensor. Good.

  The monitoring unit 21 determines or monitors whether or not the vehicle 100 has been stolen based on the monitoring result of the monitoring unit 21 (the voltage V of the first battery 2). Specifically, the monitoring unit 21 can determine that the vehicle 100 has been stolen when the voltage V of the first battery 2 shows a predetermined pattern. In other words, when the vehicle 100 is stolen, an abnormality occurs in the voltage of the first battery 2. For example, the following situation is reflected in the predetermined pattern indicating the abnormality.

  The first battery 2 may be consumed due to unauthorized use of electrical components. Further, if the vehicle 100 is moved illegally without operating the prime mover 4, the influence of the ACG 3 is not reflected on the voltage V of the first battery 2. Further, when the constant power line + B is cut, the voltage of the constant power line + B becomes almost zero.

  More specifically, when the prime mover 4 is stopped, the monitoring unit 21 monitors whether or not the decrease rate of the voltage V of the first battery 2 is larger than a predetermined decrease rate. When the vehicle 100 is stolen, the theft may enter the room illegally and start the prime mover 4 illegally. Since the thief does not have the key of the vehicle 100, it takes time to start the unauthorized prime mover 4. In addition, when a theft person steals an electrical component (part of a vehicle) such as an audio device, it takes time to remove the electrical component. At this time, the time during which a room lamp (not shown) is lit is increased with an unauthorized entry into the room. Therefore, in such a situation, the rate of decrease of the voltage V of the first battery 2 becomes large. In addition, if the thief always cuts the power supply line + B, the rate of decrease in the voltage V of the first battery 2 will increase. The monitoring unit 21 can monitor whether the vehicle 100 is stolen via the rate of decrease in the voltage V of the first battery.

  When a thief enters the room illegally, the receiver of the keyless entry system does not receive an unlock signal from a door (not shown). In other words, when a thief enters the room illegally, the room lamp is turned on as the door (not shown) is opened without blinking the blinker lamp (not shown). Although the rate of decrease of the voltage V of the first battery 2 increases due to the lighting of the room lamp, the monitoring unit 21 preferably determines or monitors that the blinker lamp is not blinking at this time. When the blinker lamp blinks, ripples (dents) occur in the waveform of the voltage V of the first battery 2, so that the monitoring unit 21 has a rate of decrease in the voltage V of the first battery 2 greater than a predetermined rate of decrease. In addition, it is preferable to monitor whether or not a ripple has occurred in the waveform of the voltage V of the first battery 2. As the monitoring result, the notification unit 24 can notify the user of vehicle theft such as “A suspicious person has opened the door” or “Please check the car” via the notification unit 4.

  Or more specifically, when the vehicle 100 is moving, the monitoring unit 21 monitors whether or not the fluctuation range of the voltage V of the first battery 2 in a predetermined period is smaller than the predetermined fluctuation range. . When the vehicle 100 is stolen or after the vehicle 100 is stolen, the theft person may pull the vehicle 100 with a tow truck (not shown) without starting the prime mover 4. When the prime mover 4 does not operate, the ACG 3 does not generate electricity. Therefore, in such a situation, the fluctuation range of the voltage V of the first battery 2 does not increase. On the other hand, when the ACG 3 generates electric power, the fluctuation range of the voltage V of the first battery 2 is large. For example, the voltage V of the first battery 2 increases and decreases in small increments. The monitoring unit 21 can monitor whether or not the vehicle 100 is stolen via the fluctuation range of the voltage V of the first battery.

  FIG. 5 shows another configuration example of the vehicle battery monitoring system according to the present invention. In the example of FIG. 5, the vehicle battery monitoring system includes an ammeter 29 instead of the blocking unit 26 of FIG. 1. In the example of FIG. 5, the ammeter 29 is installed between the positive terminal (positive electrode) of the first battery 2 and the main fuse box 6, and can detect the current of the first battery 2. In the example of FIG. 5, the vehicle battery monitoring system may include the first blocking unit 26 together with the ammeter 29.

  FIG. 6 shows an example of another schematic functional block diagram of the monitoring device according to the present invention. In the example of FIG. 6, the monitoring device 20 constituting the vehicle battery monitoring system can include an ammeter 29, and the electric power at the base of the positive terminal (positive electrode) of the first battery 2 while using the ammeter 29. A monitoring unit 21 for monitoring the state (current), that is, the electrical state (current) of the first battery 2 is provided. Note that the power supply unit that is the second battery 23 can supply power to the ammeter 29.

  In the example of FIG. 6, the monitoring unit 21 monitors the current A of the first battery 2 (for example, the base of the positive terminal (positive electrode) of the first battery 2) as the electrical state of the first battery 2. Preferably, the monitoring unit 21 can monitor not only the current A of the first battery 2 but also the voltage V of the first battery 2 as described above, for example.

  In the example of FIG. 6, the monitoring unit 21 steals the vehicle 100 based on the current A (preferably, the voltage V of the first battery 2) of the first battery 2 that is the monitoring result of the monitoring unit 21. It is determined or monitored whether or not. Specifically, the monitoring unit 21 can determine that the vehicle 100 has been stolen when the current A of the first battery 2 shows a predetermined pattern. In other words, when the vehicle 100 is stolen, an abnormality occurs in the current of the first battery 2. For example, the following situation is reflected in the predetermined pattern indicating the abnormality.

  The first battery 2 may be consumed due to unauthorized use of electrical components. Further, if the vehicle 100 is illegally moved without operating the prime mover 4, the influence of the ACG 3 is not reflected on the current A of the first battery 2.

  More specifically, when the prime mover 4 is stopped, the monitoring unit 21 monitors whether or not the increase rate of the current A of the first battery 2 is larger than a predetermined increase rate. When the vehicle 100 is stolen, the theft may enter the room illegally and start the prime mover 4 illegally. As a theft person enters the room illegally, the time for which a room lamp (not shown) is lit becomes longer. Therefore, in such a situation, the consumption rate of the current A of the first battery 2 (the increase rate of the integrated value of the discharge current of the first battery 2) becomes large.

  When a thief enters the room illegally, the receiver of the keyless entry system does not receive an unlock signal from a door (not shown). In other words, when a thief enters the room illegally, the room lamp is turned on as the door (not shown) is opened without blinking the blinker lamp (not shown). The consumption rate of the current A of the first battery 2 increases due to the lighting of the room lamp. At this time, the monitoring unit 21 preferably determines or monitors that the blinker lamp is not blinking. When the blinker lamp blinks, ripples (dents) occur in the waveform of the current A of the first battery 2, so that the monitoring unit 21 has a consumption rate of the current A of the first battery 2 greater than a predetermined decrease rate. In addition, it is preferable to monitor whether or not ripple has occurred in the waveform of the current A of the first battery 2. In addition, since the responsiveness of the electric current A of the 1st battery 2 is quicker than the responsiveness of the voltage V of the 1st battery 2, at least the monitoring part 21 using the ammeter 29 does not blink the blinker lamp. The monitoring unit 21 that monitors the current A and the voltage V of the first battery 2 can more reliably determine or monitor that the blinker lamp is not blinking.

  Or more specifically, when the vehicle 100 is moving, the monitoring unit 21 in FIG. 6 determines whether or not the charge amount of the current A of the first battery 2 in the predetermined period is smaller than the predetermined charge amount. To monitor. Of course, the monitoring unit 21 in FIG. 6 may further monitor whether or not the fluctuation range of the voltage V of the first battery 2 in a predetermined period is smaller than the predetermined fluctuation range. When the vehicle 100 is stolen or after the vehicle 100 is stolen, the theft person may pull the vehicle 100 with a tow truck (not shown) without starting the prime mover 4. When the prime mover 4 does not operate, the ACG 3 does not generate electricity. Therefore, in such a situation, the charge amount of the current A of the first battery 2 (the charge current of the first battery 2) does not increase. In other words, when the discharge current of the current A of the first battery 2 is, for example, a positive value, the charging current of the current A of the first battery 2 is, for example, a negative value, and the first time when the ACG 3 does not generate power The current A (charging current) of the battery 2 does not show a negative value. On the other hand, when the ACG 3 generates power, the first battery 2 is charged by the ACG 3, and the charging current of the current A of the first battery 2 shows a negative value, for example. The monitoring unit 21 can monitor whether or not the vehicle 100 is stolen via the charge amount of the current A of the first battery.

  FIG. 3 shows an example of an explanatory diagram of the relationship between the remaining amount of the vehicle battery and the voltage. In the example of FIG. 3, the vehicle battery is, for example, a lead storage battery, and when the remaining amount (initial capacity) of the vehicle battery is 100 [%], the voltage of the vehicle battery indicates, for example, 12.5 [V]. Since the voltage of the vehicle battery decreases when the remaining amount of the vehicle battery decreases, when the remaining amount of the vehicle battery is 90, 83, 75 and 60 [%], the voltage of the vehicle battery is, for example, 12.2 respectively. 12.0, 11.5, 11.0 [V]. Further, when the remaining amount of the vehicle battery falls below, for example, 75 [%], the deterioration of the vehicle battery increases, and the capacity of the vehicle battery (capacity at full charge) decreases. In addition, when the remaining amount of the vehicle battery falls below 60%, for example, the engine cannot be started. Considering such characteristics of the vehicle battery, it is preferable that the remaining amount or voltage of the vehicle battery does not decrease. In particular, the remaining amount or voltage of the vehicle battery is less than 60 [%] or 11.0 [V]. Preferably not.

  However, when the vehicle 100 is stolen, the vehicle 100 is used illegally. Therefore, in such a situation, the monitoring unit 21 in FIG. 2 can discharge the first battery 2. The voltage of the 1st battery 2 is reduced by discharge of the 1st battery 2, and the residual amount of the 1st battery 2 is less than 60 [%]. Under such circumstances, the prime mover 4 can no longer be started with the first battery 2. The prime mover 4 cannot be started and the vehicle 100 itself can be prevented from being stolen. Similarly, when the vehicle 100 is stolen, the shut-off unit 26 can cut off the power supplied from the first battery 2 to the electrical component, thereby making the prime mover 4 unstartable.

  The monitoring unit 21 in FIG. 2 or 6 has a load (not shown) only for discharging the first battery 2, and can apply the voltage of the first battery 2 to the load. Alternatively, the monitoring unit 21 controls the switching unit 22 so that the switching unit 22 always connects the power supply line + B to the ground (vehicle body 1). At this time, the monitoring unit 21 monitors the current A flowing through the switching unit 22. Preferably, the switching unit 22 limits the current A (the charging current to the second battery 23) flowing from the power supply line + B to the ground (vehicle body 1) from the constant power line + B to 2 [A] or less, for example, by the control from the monitoring unit 21. Or it is preferable to adjust.

  In the example of FIG. 1, the blocking unit 26 is installed between the positive terminal (positive electrode) of the first battery 2 and the main fuse box 6, and the blocking unit 26 is controlled by the monitoring unit 21 according to the first The + terminal of the battery 2 can be floated. Or the interruption | blocking part 26 is comprised by the relay, for example, and the interruption | blocking part 26 cut | disconnects the + terminal (positive electrode) of the 1st battery 2 and the main fuse box 6 by control from the monitoring part 21. Can do. Although the interruption | blocking part 26 can make all the electrical components which operate | move with the electric power from the 1st battery 2 inoperable, you may make the starter 5 inoperable at least, In this case, the interruption | blocking part 26 is It may be installed at any position between the positive terminal (positive electrode) of the first battery 2 and the starter 5, and the blocking unit 26 may be installed in the main fuse box 6, for example.

  In the example of FIG. 1, the wiring between the positive terminal (positive electrode) of the first battery 2 (vehicle battery) and the node P1 on the constant power supply line + B is composed only of a thick (for example, 5 [sq]) short electric wire. Therefore, the electric resistance of the wiring can be almost ignored. On the other hand, the wiring between the node P1 and the node P2 on the constant power supply line + B is thin (for example, 0) between the blocking unit 26, the main fuse box 6, the indoor fuse box 10, and the main fuse box 6 and the indoor fuse box 10. .5 [sq]) Since it is constituted by a long electric wire, the electric resistance of the wiring cannot be ignored. In other words, when the voltage V of the first battery 2 is constantly measured at the node P2 on the power supply line + B, the voltage V decreases due to a voltage drop. The remaining amount (capacity) of the vehicle battery may be converted. In addition, the heat resistance and water resistance of the monitoring device 20 (excluding the blocking unit 26) installed on the indoor side such as the node P2 on the power line + B are always installed on the engine room side such as the node P1. It can be set lower than the resistance at the time of the operation, and thereby the manufacturing cost of the monitoring device 20 (excluding the blocking unit 26) installed indoors can be reduced.

  FIG. 4 shows an example of a temporal change in the remaining amount of the vehicle battery. In the example of FIG. 4, time zero is when the prime mover 4 is stopped, and the remaining amount of the vehicle battery (first battery 2) at time zero exceeds, for example, 100 [%]. In other words, since the ACG 3 is generating power before the prime mover 4 is stopped, the voltage of the first battery 2 immediately after the prime mover 4 is stopped is highly measured due to the influence of the ACG 3. The monitoring unit 21 in FIG. 2 or FIG. 6 additionally includes a table as shown in FIG. 3 and characteristics of the first battery 2 such as a mathematical expression equivalent to this table (relationship between the remaining amount of the vehicle battery and the voltage). And the measured voltage V of the first battery 2 can be converted into the remaining amount of the first battery 2 from such characteristics. When the prime mover 4 is stopped, specifically, in the example of FIG. 4, the monitoring unit 21 continues to monitor the voltage V of the first battery 2 from time zero to time t4. In other words, the monitoring device 20 monitors whether the vehicle 100 is stolen until the remaining amount of the second battery 23 runs out.

  In addition, when the remaining amount of the first battery 21 is monitored, the voltage of the first battery 2 after the prime mover 4 is stopped decreases due to the dark current of the electrical components. It is important whether the prime mover 4 can be started with the current measured voltage V. In addition, when monitoring the remaining amount of the first battery 21, it is also important whether or not the deterioration of the first battery 2 becomes large at the current measured voltage V of the first battery 2. is there.

  For example, in the example of FIG. 2, the monitoring unit 21 informs the notification unit 4 of the current measured voltage V (or incidental remaining amount) of the first battery 2 and / or theft of the vehicle 100 as a monitoring result. The user can be notified. Here, the notification unit 4 is configured with, for example, a display, a speaker, and the like, and can transmit a monitoring result to an indoor user (occupant). Preferably, the notification unit 4 includes, for example, a 3G communication module, LTE ( long term evolution), a transmitter such as a WiFi (wireless fidelity) communication module, etc., and monitoring results (for example, theft of the vehicle 100, first battery, etc.) to an outdoor or indoor user or a portable terminal (not shown) 2 of the current measured voltage V or remaining amount) can be transmitted in a transmission format such as e-mail. In response to this, the user can visually confirm whether or not the vehicle 100 is stolen. Alternatively, incidentally, when the remaining amount of the first battery 21 is monitored, before the voltage V or the remaining amount of the first battery 2 decreases, for example, the vehicle 100 is driven or the first battery 2 is turned off. It is possible to charge with a dedicated charger (not shown), connect a booster cable (not shown) to the first battery 2 in some cases, and recover the remaining amount of the first battery 2. Alternatively, incidentally, when the remaining amount of the first battery 21 is monitored, the user does not care about the remaining amount of the first battery 2 until the voltage V or the remaining amount of the first battery 2 decreases. Thus, the first battery 2 or the electrical component can be used.

  2 or 6 can first determine whether or not the prime mover 4 is stopped. For example, in the example of FIG. 2, the monitoring unit 21 can determine whether or not the prime mover 4 is stopped by a sensor 25 such as a vibration sensor. The vibration sensor can be constituted by, for example, a triaxial acceleration sensor. When the triaxial acceleration sensor does not detect vibration due to the operation of the prime mover 4, the monitoring unit 21 determines or monitors that the prime mover 4 is stopped. can do. For example, the monitoring unit 21 may determine whether or not the prime mover 4 is stopped in the OFF state of the ignition switch 9. In this case, the ignition switch 9 and the monitoring unit 21 (monitoring device 20) can be wired so that the monitoring unit 21 can capture the signal from the ignition switch 9.

  The triaxial acceleration sensor can also detect the movement of the vehicle 100, and the monitoring unit 21 can determine whether or not the vehicle 100 is moving with the triaxial acceleration sensor. The movement of the vehicle 100 can also be detected by a GPS (global positioning system) sensor, and the monitoring unit 21 can determine or monitor the presence or absence of movement of the vehicle 100 with a sensor 25 such as an acceleration sensor or a GPS sensor.

  Note that the sensor 25 or the vibration sensor may detect a vibration having only a frequency lower than the vibration frequency due to the operation of the prime mover 4 (low frequency vibration). In this case, the monitoring unit 21 stops the prime mover 4. In this case, it may be determined or monitored whether or not the vehicle 100 has been stolen by detecting only low-frequency vibrations by the vibration sensor. However, for example, when a cat rides on a hood (not shown), vibration occurs, and the vehicle 100 may be erroneously determined to be stolen even when the vehicle 100 is not actually stolen. Therefore, the monitoring unit 21 preferably determines whether or not the vehicle 100 has been stolen based on the monitoring result of the voltage V of the first battery 2 (preferably, the voltage A of the first battery 2). More preferably, the monitoring unit 21 determines whether or not the vehicle 100 has been stolen based on both the monitoring result of the low-frequency vibration by the vibration sensor and the monitoring result of the voltage V of the first battery 2, for example.

  In the example of FIG. 4, the monitoring unit 21 waits until the influence of the ACG 3 on the first battery 2 is almost eliminated, that is, until 30 minutes elapse from the time zero, for example, a predetermined interval such as an interval of 1 minute. Thus, the voltage V or remaining amount of the first battery 2 can be measured or monitored, and the measured value can be stored. The monitoring unit 21 obtains the attenuation characteristic of the voltage V or the remaining amount of the first battery 2 based on the plurality of stored measurement values, and incidentally, the future voltage V of the first battery 2 is, for example, the remaining amount 60 [ %] Can be predicted or monitored. Here, for example, if the voltage dropped from the positive terminal of the first battery 2 to the node P2 is 1.5 [V], the first voltage corresponding to the remaining amount 60 [%] is, for example, 9.5. [V] (= 11.0 [V] −1.5 [V]).

  When the monitoring unit 21 monitors the presence or absence of the vehicle 100 at the rate of decrease in the voltage V of the first battery 2, the monitoring unit 21 has almost no influence of the ACG 3 on the first battery 2, that is, For example, after 30 minutes have elapsed from time zero, the vehicle 100 can be monitored for theft.

  In addition, the monitoring unit 21 accompanies the monitoring result as, for example, “the voltage of the vehicle battery is less than the first voltage in the remaining XX hours.” The estimated time such as “The engine cannot be started in the remaining XX time” can be notified to the user via the notification unit 4. Here, the first voltage is set to a reference (remaining amount 60 [%]) indicating whether or not the prime mover 4 can be started. For example, is the deterioration of the first battery 2 large? It may be set as a reference indicating a failure (remaining amount 75 [%]). In this case, the monitoring unit 21 indicates, for example, “the remaining amount of the vehicle battery is less than 75 [%] in the remaining XX time” as the monitoring result, and “the vehicle battery deteriorates in the remaining XX time. The predicted time such as “” can be notified to the user via the notification unit 4.

  In addition, every time the prime mover 4 stops, that is, every time the operation of the vehicle 100 ends, the monitoring unit 21 keeps the first battery 2 in an interval of, for example, 1 minute from the time zero until 30 minutes elapse. Measure the voltage V or remaining amount and save. The monitoring unit 21 can obtain a comparison value such as an average value or a median value of the past attenuation characteristics of the voltage V or the remaining amount of the first battery 2, and the current value from the time zero until, for example, 30 minutes elapses. And a comparison value indicating a past attenuation characteristic can be compared or monitored. For example, when the monitoring unit 21 does not monitor the presence or absence of theft of the vehicle 100 at the rate of decrease in the voltage V of the first battery 2 until 30 minutes elapse from time zero, the monitoring unit 21 Forgetting to erase an item may be predicted or monitored. Specifically, the monitoring unit 21 determines that the current attenuation characteristic is larger than the past attenuation characteristic until 30 minutes elapse from time zero, and the current voltage V or the remaining amount of the first battery 2 is When the rate of decrease is high, this monitoring result (for example, “Headlight is on. Return to the car.”, “Did you forget to turn off any electrical components?”) The user can be notified via

  The monitoring unit 21 can incidentally determine or monitor whether or not the current voltage V of the first battery 2 is lower than the second voltage. In the example of FIG. The voltage V of the battery 2 is lower than the second voltage corresponding to, for example, the remaining amount 83 [%]. The second voltage can be set higher than the first voltage, and the monitoring unit 21 delays the future voltage V of the first battery 2 from reaching the first voltage after time t1. Can be made. When the first voltage is set to a reference (remaining amount 60 [%]) indicating whether or not the prime mover 4 can be started, the second voltage is not the remaining amount 83 [%]. The reference (remaining amount 75 [%]) indicating whether or not the deterioration of the first battery 2 becomes large may be set.

  In the example of FIG. 4, from time zero to time t1, the monitoring unit 21 controls the switching unit 22 so that the first battery 2 and the second battery 23 are disconnected, and monitoring is performed after time t1. The unit 21 can incidentally control the switching unit 22 so that the first battery 2 and the second battery 23 are connected in parallel. Since the second battery 23 can supply the electric power from the second battery 23 to the electrical component to which the electric power from the first battery 2 has been supplied after the time t1, the second battery 23 The battery 23 can suppress a decrease in the remaining amount of the first battery 2.

  The voltage between the positive terminal (positive electrode) of the second battery 23 and the negative terminal (negative electrode) of the second battery 23 is, for example, 12.5 corresponding to the remaining amount 100 [%] of the first battery 2. It can be set to 12.8 [V] which is higher than [V]. The second battery 23 is, for example, a lithium ion storage battery. The second battery 23 is charged from 0 [%] to 100 [%], for example, with a remaining current of the second battery 23 (for example, an initial capacity of 2000 [mAh]) with a charging current of 2 [A] for one hour, for example. It consists of a battery that can be charged quickly. The voltage of the second battery 23, which is a battery that can be rapidly charged, can be maintained at, for example, 12.8 [V] regardless of the remaining amount of the second battery 23.

  In the example of FIG. 4, since the power from the second battery 23 is incidentally supplied to the electrical component from time t1 to time t3, the voltage V of the first battery 2 is the solid line in FIG. As shown by the above, it is kept at a constant value, that is, the second voltage corresponding to the remaining amount 83 [%] of the first battery 2. Note that when the monitoring unit 21 monitors the presence or absence of theft of the vehicle 100 at the rate of decrease in the voltage V of the first battery 2, the switching unit 22 performs the first battery at time t1 from time t1 to time t3. 2 and the second battery 23 are not connected in parallel. In this case, as indicated by a dotted line in FIG. 4, the voltage V or the remaining amount of the first battery 2 is reduced by the dark current of the electrical component even after the time t1. For example, after 30 minutes have elapsed since time zero, the monitoring unit 21 obtains the rate of decrease in the voltage V of the first battery 2, and the current voltage V of the first battery 2 is greater than the voltage predicted from the rate of decrease. When it is low, it can be determined that the rate of decrease of the voltage V of the first battery 2 is greater than the predetermined rate of decrease. Similarly, the monitoring unit 21 can determine that the consumption rate of the current A of the first battery 2 is larger than a predetermined consumption rate. However, even if the monitoring unit 21 monitors whether the vehicle 100 is stolen based on the rate of decrease of the voltage V of the first battery 2 and / or the consumption rate of the current A of the first battery 2, the monitoring unit 21. Unless the low frequency vibration is detected by the vibration sensor, the switching unit 22 may connect the first battery 2 and the second battery 23 in parallel at time t1 from time t1 to time t3.

  As described above, the monitoring unit 21 can predict the time when the future voltage V of the first battery 2 falls below the first voltage corresponding to, for example, the remaining amount 60 [%]. As shown in FIG. 4 (time t1 to time t3), when the power of the second battery 23 is supplied to the electrical component, the monitoring unit 21 also considers the remaining amount% of the second battery 23, The time when the future voltage V of the first battery 2 falls below the first voltage, for example, can be predicted. In other words, if the electric power of the second battery 23 is not supplied to the electrical component, the monitoring unit 21 does not consider the remaining amount% of the second battery 23, and the first battery follows the dotted line in FIG. The time when the future voltage V of the first battery 2 falls below, for example, the first voltage may be predicted with the voltage V of 2 or the attenuation characteristic of the remaining amount.

  By the way, the monitoring unit 21 can additionally store a plurality of basic characteristics that can be compared with the attenuation characteristic of the voltage V or the remaining amount of the first battery 2. It is possible to determine or monitor which of the plurality of basic characteristics matches. Here, the basic characteristic correlates with the dark current of the electrical component (excluding the monitoring device 20 to which power from the second battery 23 is supplied), and the monitoring unit 21 has the current attenuation characteristic or the matching basic characteristic. Based on this, the dark current of the electrical component can be predicted or monitored. The monitoring unit 21 can use the second battery 23 based on the predicted dark current of the electrical component, the dark current (consumption current) of the monitoring device 20 itself, and the remaining amount% of the second battery 23 (time). t1 to time t3) can be predicted or monitored, and the time t4 when the future voltage V of the first battery 2 falls below the first voltage, for example, can be predicted or monitored.

  For example, in the example of FIG. 2, the monitoring unit 21 can measure or monitor the current A (discharge current from the second battery 23) that always flows from the second battery 23 to the power supply line + B or the electrical component. The monitoring unit 21 controls the switching unit 22 so that the first battery 2 and the second battery 23 are connected in parallel at time t1, and at this time, the electrical component is supplied from the second battery 23. Since electric power is supplied, the discharge current from the second battery 23 may be measured. In this case, the monitoring unit 21 determines the dark current (discharge current from the second battery 23) measured by the electrical component, the dark current (consumption current) of the monitoring device 20 itself, and the remaining amount% of the second battery 23. Based on the above, the usable time (time t1 to time t3) of the second battery 23 may be predicted or monitored. In addition, the monitoring unit 21 corrects the current attenuation characteristic of the voltage V or the remaining amount of the first battery 2 in consideration of the dark current measured by the electrical component (discharge current from the second battery 23). May be.

  For example, in the example of FIG. 2, the second battery 23 has a communication terminal (gauge) other than the + terminal (positive electrode) and the − terminal (negative electrode), and the monitoring unit 21 is connected to the communication terminal of the second battery 23. The remaining amount% of the second battery 23 can be measured or monitored. The monitoring unit 21 can additionally monitor the remaining amount% of the second battery 23 at an arbitrary time such as time zero or time t1. When the prime mover 4 is operating, the monitoring unit 21 can control the switching unit 22 so as to charge the second battery 23. Here, the switching unit 22 is always connected to the first power line + B from the first power line + B. The current A flowing through the second battery 23 (the charging current to the second battery 23) may be limited or adjusted.

  The second battery 23 shown in FIG. 2 or 6 is preferably replaceable or detachable from the monitoring device 20. For example, when a problem occurs in the remaining amount% of the second battery 23 at time zero, the monitoring unit 21 indicates the monitoring result (for example, “the remaining amount of the spare battery is low. Please replace the spare battery”, “please charge the spare battery with the dedicated charger”, etc.) and the notification unit 4. The user can be notified via

  The monitoring unit 21 can determine or monitor whether or not the current remaining amount% of the second battery 23 is lower than the first remaining amount (for example, 10 [%]). In the example of FIG. The remaining amount% of the second battery 23 at t2 is lower than the first remaining amount, for example, 10% remaining amount. As a monitoring result, the monitoring unit 21 can notify the user of the state of the spare battery such as “the remaining amount of the spare battery has fallen below 10%” via the notification unit 4. Here, the user may set the priority for monitoring the theft of the vehicle 100 to be lower than the priority of the first battery 2, and in this case, the user or the mobile terminal stops the monitoring of the theft of the vehicle 100. The instruction may be sent to the communication unit constituting the notification unit 24, and the monitoring unit 21 may stop the function or control for monitoring whether the vehicle 100 is stolen, and reduce the power consumption of the monitoring unit 21 or the monitoring device 20. . When the monitoring unit 21 stops the function or control for monitoring whether or not the vehicle 100 is stolen, the notification unit 4 notifies the monitoring state of the monitoring device 20 such as “Vehicle theft monitoring has been stopped.” 4 can be notified to the user.

  The monitoring unit 21 additionally determines or monitors whether or not the current remaining amount% of the second battery 23 is lower than a first remaining amount (for example, 2 [%]) lower than the first remaining amount. In the example of FIG. 4, the remaining amount% of the second battery 23 at time t <b> 3 is lower than the second remaining amount, for example, remaining amount 2 [%]. After time t3, the monitoring unit 21 can control the switching unit 22 so that the first battery 2 and the second battery 23 are disconnected. Thereby, the fall of the remaining amount% of the second battery 23 is suppressed, and the monitoring unit 21 that operates with the power from the second battery 23 continues to monitor the voltage V of the first battery 2 after time t3. can do. Note that at time t3, the monitoring unit 21 may stop the function or control for monitoring whether the vehicle 100 is stolen.

  The monitoring unit 21 can incidentally determine or monitor whether or not the current voltage V of the first battery 2 is lower than the first voltage. In the example of FIG. The voltage V of the battery 2 is lower than a first voltage corresponding to, for example, a remaining amount of 60 [%]. In addition, the monitoring unit 21 may indicate, for example, “the vehicle battery voltage has fallen below the first voltage”, “the engine can no longer be started”, or “please charge the vehicle battery.” Or the like can be notified to the user via the notification unit 4. After time t4, the monitoring unit 21 can stop monitoring the voltage V or the remaining amount of the first battery 2. Note that at time t4, the monitoring unit 21 may stop the function or control for monitoring whether the vehicle 100 is stolen.

  As described above, the monitoring unit 21 can measure or monitor the voltage V or the remaining amount of the first battery 2 at a predetermined interval such as a one-minute interval, for example, until 30 minutes elapse from time zero. it can. For example, after 30 minutes have elapsed after the prime mover 4 is stopped, the monitoring unit 21 can shorten the predetermined interval for monitoring the voltage V or the remaining amount of the first battery 2. For example, after 30 minutes have elapsed since time zero, the monitoring unit 21 can change the predetermined interval from, for example, 1 minute interval to, for example, 1 second interval. However, unless the monitoring unit 21 detects low-frequency vibration by the vibration sensor, for example, after 30 minutes have elapsed from time zero, the monitoring unit 21 sets a predetermined interval for monitoring the voltage V or the remaining amount of the first battery 2. Can be long. For example, after 30 minutes have elapsed since time zero, for example, the monitoring unit 21 may change the predetermined interval from, for example, 1 minute to, for example, 1 hour unless the monitoring unit 21 detects low-frequency vibrations using a vibration sensor. it can. Further, for example, after time t3, the monitoring unit 21 measures or monitors the voltage V or the remaining amount of the first battery 2 at intervals of, for example, 5 hours unless the monitoring unit 21 detects low-frequency vibration by the vibration sensor. Can do. Thereby, the fall of the residual amount% of the 2nd battery 23 can be suppressed.

  The present invention is not limited to the above-described exemplary embodiments, and those skilled in the art will be able to easily modify the above-described exemplary embodiments to the extent included in the claims. .

  DESCRIPTION OF SYMBOLS 1 ... Vehicle body, 2 ... 1st battery (vehicle battery), 3 ... ACG, 4 ... prime mover, 5 ... starter, 6 ... main fuse box, 8 ... switch , 9 ... Ignition switch, 10 ... Indoor fuse box, 11 ... Headlight (electrical component), 20 ... Monitoring device (vehicle battery monitoring system), 21 ... Monitoring unit, 22 ... Switching unit, 23 ... second battery (backup battery), 24 ... notification unit, 25 ... sensor, 29 ... ammeter, 100 ... vehicle, ACC ... accessory power line , + B: Always power line.

Claims (6)

A monitoring unit that monitors the electrical state of the first battery capable of starting the prime mover of the vehicle;
A power supply unit that is a second battery for supplying power to the monitoring unit;
With
The vehicle monitoring system, wherein the monitoring unit determines whether or not the vehicle has been stolen based on a monitoring result of the monitoring unit.   When the prime mover is stopped, the monitoring unit determines whether the voltage decrease rate of the first battery as the electrical state is greater than a predetermined decrease rate and / or as the electrical state. The vehicle battery monitoring system according to claim 1, wherein whether or not a current consumption rate of the first battery is larger than a predetermined consumption rate is monitored.   When the vehicle is moving, the monitoring unit determines whether or not a fluctuation range of the voltage of the first battery as the electrical state in a predetermined period is smaller than a predetermined fluctuation range and / or a predetermined period. 3. The vehicle battery monitoring system according to claim 1, wherein whether or not a charge amount of the current of the first battery as the electrical state is smaller than a predetermined charge amount is monitored.   4. The vehicle battery monitoring system according to claim 1, wherein when the vehicle is stolen, the monitoring unit discharges the first battery. 5. The vehicle battery monitoring according to any one of claims 1 to 4, further comprising a blocking unit that blocks power supplied from the first battery to an electrical component when the vehicle is stolen. system. The vehicle battery monitoring system according to claim 1, further comprising a notification unit that notifies a user of a monitoring result of the monitoring unit.

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