JP3661452B2 - Vehicle battery prevention device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle battery prevention device, and more particularly to a vehicle battery prevention device suitable for use in a vehicle configured to supply electric power from a vehicle battery power source to a vehicle electronic control device.
[0002]
[Prior art]
A battery mounted on the vehicle is charged when the engine is driven, and is consumed by various on-vehicle lighting lamps, various interior devices, and engine auxiliary equipment. Such a battery discharges spontaneously when left for a long period of time, and particularly when various interior lamps are left forgotten to be turned off, the battery runs out. 2. Description of the Related Art Conventionally, there has been known a battery rise prevention device that can prevent battery rise due to forgetting to turn off such an interior lamp.
[0003]
This kind of battery run-off prevention device is used when the vehicle is in new car distribution or new car storage, that is, when the vehicle is considered to be pre-delivery, for example, the cumulative travel distance, for example, about 24 km, and the power cut waiting time The power cut waiting time after delivery of the mileage is set in advance, and each time the ignition key switch of the vehicle is turned off, each cut waiting time set in advance at the current mileage is set. Waiting for the progress, when it passes, the power circuit of the interior lamp is shut off to prevent the battery from running out. In this case, a short cut waiting time of about 3 minutes when in the accumulated mileage range before delivery, and about 20 minutes when in the accumulated mileage range after delivery, that is, a cut waiting time that does not cause a problem during normal use. The power circuit of the interior lamp is cut off, preventing the battery from running out due to forgetting to turn off the interior lamp.
[0004]
[Problems to be solved by the invention]
The above-mentioned battery rise prevention device can cut off the power supply circuit of the interior lamp without waste with a cut waiting time suitable for the use state estimated from the accumulated travel distance of the vehicle, and can prevent the battery rise. It is caused by other factors besides forgetting to turn off the interior lamp.
For example, a variety of vehicle electronic control devices are used for vehicles such as engine control, various running state controls, and interior equipment control. Japanese Patent Application Laid-Open No. 10-80070 discloses an electronic control device capable of reducing power consumption of the vehicle electronic control device when the vehicle is stopped.
[0005]
As is apparent from these, the backup memory of the vehicle electronic control device consumes a low current to maintain the standby state even when the ignition key is turned off. Such a low current supplied to the backup memory also causes a problem if the battery continues to flow for a long time, causing a problem.
SUMMARY OF THE INVENTION An object of the present invention is to prevent a battery from running out of a vehicle, which can prevent battery running-out accurately by shutting off at least a backup memory power circuit out of two power circuits, ie, a backup memory and a vehicle interior lamp, at a set time according to the travel distance. Another object of the present invention is to provide an apparatus for preventing the battery from running out and to prevent the battery from running out due to forgetting to turn off the vehicle interior lamp.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the invention of claim 1
The travel distance calculation means calculates the cumulative travel distance of the vehicle, the ignition key switch on / off state detection means detects the on / off state of the ignition key switch of the vehicle, and the first power cut means detects the vehicle electronic control device from the vehicle battery. The power supply circuit to the backup memory is arranged so as to be cut, and the second power cut means is arranged to cut the power supply circuit from the battery to the vehicle interior lamp, and the integrated traveling distance is less than a predetermined value by the control means. in the case of a control means for driving at least one of said first power supply cut means and the second power supply cutting means after a set cut waiting time after the ignition key switch off, further, the control means The cut waiting time for each cumulative travel distance area and the same cumulative travel distance area are set in advance. , The elapsed time after off of the ignition key switch is so as to drive the first power supply cutting means and or the second power supply cutting means when the lapse of the setting cut waiting time at the current accumulated mileage.
Here, when the cumulative travel distance is less than or equal to a predetermined value, at least the first power cut means is driven after the set cut waiting time after the ignition key switch is turned off. For this reason, in a mileage range where the accumulated mileage is less than or equal to a predetermined value, for example, in a mileage range that does not require data storage in the backup memory before the vehicle is delivered, there is no wasteful power supply to the backup memory and the battery runs out. In a travel distance range of a predetermined value or more, wasteful power supply to the vehicle interior lamp can be eliminated, and the battery can be prevented more reliably.
Further, since the travel distance area and the set cut waiting time corresponding thereto are obtained and the first power cut means and / or the second power cut means are driven after the set cut wait time at the current travel distance has elapsed, the travel distance Dividing the area into multiple areas, setting different power cut conditions for each mileage area, and selectively setting power supply cut to backup memory and power supply cut process to vehicle interior lamp for each mileage area It is possible to cut the power supply suitable for each mileage range, and more reliably prevent the battery from running out.
The control means may calculate an integrated continuous travel distance, and determine that the vehicle has been delivered when the integrated continuous travel distance exceeds a predetermined value in a travel distance area that may have been delivered. In this case, particularly the reliability of power supply cut control is improved.
[0008]
According to a second aspect of the present invention, there is provided a battery rising prevention device according to the first aspect of the invention, in particular, in a driver's seat door open / close detecting means for detecting opening / closing of the driver's seat door, and a power supply circuit from the battery to the vehicle interior lamp Current control means arranged, and the control means is an elapsed time after the ignition key switch is turned off at the time of inputting a signal from the driver door opening / closing detection means and / or a signal from the current detection means When the set elapsed time has passed, the second power cut means is driven.
In this case, if the set cut waiting time has passed after the ignition key switch is turned off during the opening / closing operation of the driver's door and / or the power supply to the vehicle interior lamp, the power supply to the vehicle interior lamp is cut off and the battery power is increased. By selectively combining this process with a process that eliminates wasteful power supply to the backup memory and the vehicle interior lamp according to the travel distance, it is possible to more reliably prevent the battery from running out. .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 and FIG. 2 show a battery rising prevention device for a vehicle to which the present invention is applied. This vehicle battery prevention device 1 divides a mileage range into a number of mileage ranges, in this case, three mileage ranges of 0 to 30 miles, 30 to 90 miles, and 90 miles or more. The condition is set and the power supply cut to the backup memory 10 and the power supply cut to the vehicle interior lamp 6 are selectively set for each mileage range.
[0010]
The vehicle battery rising prevention device 1 here has an electric circuit C as shown in FIG. The electric circuit C includes a battery 4, an output terminal 11 connected to the battery 4 via a fuse box 9, a control unit 12 connected to the output terminal 11, and a backup memory of the output terminal 11 and the vehicle electronic control unit ECU. (ROM) 10 is connected to a first power supply circuit 5; a keep relay [1] 13 which is disposed in the first power supply circuit 5 and forms first power cut means A3 which will be described later; an output terminal 11; 6 is connected to the second power supply circuit 7, the keep power relay [2] 14 which is disposed in the second power supply circuit 7 and forms the second power cut means A 4 described later, and the vehicle speed pulse signal v is output to the control unit 12. A vehicle speed pulse signal generator 2 that performs an on / off signal (ACC position signal) IG to the control unit 12 (hereinafter simply referred to as “I”). Referred to as switch) includes a 3, and a driver's seat door switch 8 for outputting a signal ds switching to the control unit 12.
[0011]
The vehicle electronic control unit ECU has a vehicle engine control function and various running state control functions, and a keep relay [1] 13 is provided in a first power supply circuit 5 that connects a battery 4 and a backup memory (ROM) 10. Is done. Note that the output terminal 131 side of the keep relay [1] 13 is branched although not shown, and is connected to a plurality of vehicle electronic control devices constituting other vehicle control means (not shown). In FIG. 1, the output terminal 141 of the keep relay [2] 14 is connected to a pair of vehicle interior lamps 6 and 6. The output terminal 141 side of the keep relay [2] 14 is branched although not shown, and is configured to be branched and connected to a plurality of other interior lamps not shown.
[0012]
The control unit 12 includes a known microcomputer (hereinafter simply referred to as a microcomputer) 15, a current detection circuit 16 that detects the current value signal i of the second power supply circuit 7 and outputs it to the microcomputer 15, and a first keep relay switching circuit. 17 and a second keep relay switching circuit 18. The first keep relay switching circuit 17 excites the solenoid 132 of the keep relay [1] 13 in accordance with the drive signal of the microcomputer 15 to switch the normally closed contact 133 to open, and shuts off the first power supply circuit 5. The second keep relay switching circuit 18 excites the solenoid 142 of the keep relay [2] 14 according to the drive signal of the microcomputer 15 to switch the normally closed contact 143 to open, and shuts off the second power supply circuit 7.
Here, as shown in FIG. 2, the vehicle battery prevention device 1 includes a travel distance calculation unit A1, an IG switch on / off state detection unit A2, a first power cut unit A3, a second power cut unit A4, The driver door opening / closing detection means A5, the current detection means A6, and the control means A7 are provided. In particular, the microcomputer 15 is configured to perform the function as the control means A7.
[0013]
The travel distance calculation means A1 calculates an integrated travel distance N of a vehicle (not shown). The microcomputer 15 counts the vehicle speed pulse signal v from the vehicle speed pulse signal generator 2 to calculate the integrated travel distance N.
The IG switch on / off state detection means A2 comprises an IG switch 3, and outputs an on signal IG to the microcomputer 15 when the ACC position is reached from the OFF position.
The first power cut means A3 comprises a keep relay [1] 13, which cuts off or cuts off the first power supply circuit 5 from the battery 4 as a power source to the backup memory 10 of the vehicle electronic control unit ECU in time. To do.
[0014]
The second power cut means A4 comprises a keep relay [2] 14, and shuts off (cuts) or conducts the second power supply circuit 7 from the battery 4 to the vehicle interior lamp 6 in a timely manner.
The driver's seat door open / close detection means A5 is composed of a driver's seat door switch 8, detects the opening / closing of a driver's seat door (not shown), and outputs a switching signal ds to the microcomputer 15.
The current detection means A6 is constituted by a current detection circuit 16 and is disposed in a second power supply circuit 7 that connects the battery 4 and the vehicle interior lamp 6, and detects a current value signal i of the second power supply circuit 7. And output to the microcomputer 15.
[0015]
The function as the control means A7 is performed by the microcomputer 15. When the integrated travel distance N from the travel distance calculation means A1 is equal to or less than a predetermined value, the control means A7 is connected to the first power cut means A3 and the second power supply after the set cut waiting time Tn after the IG switch 3 is turned off. At least the first power cut means A3 of the cut means A4 is driven. In particular, here, the accumulated travel distance area is divided into a large number of areas (three travel distance areas of 0 to 30 miles, 30 to 90 miles, 90 miles or more, which will be described later), and each cut waiting time Tn ( (3 minutes, 36 hours to be described later) is set, and when the elapsed time t after the IG switch 3 is turned off has passed the set cut waiting time Tn corresponding to the current accumulated travel distance N, It functions to drive the two power cut means A4 together. Further, the control means A7 sets the elapsed time t after the IG switch 3 is turned off when the switching signal ds from the driver door opening / closing detection means A5 and / or the current value signal i from the current detection means A6 are input. When the cut waiting time Tn is passed, the second power cut means A4 is driven to function to cut the power supply circuit 7 to the vehicle interior lamp 6.
[0016]
The microcomputer 15 as the control means A7 switches and controls the keep relay [1] 13 and the keep relay [2] 14 in accordance with the power source switching control processing routine shown in FIGS.
The main routine here is executed when the IG switch 3 is turned on. Here, the process proceeds to a data capture process a1, where the data of each driving state is captured, a post-delivery flag FLG1 described later is initially set to OFF (= 0), and then the process proceeds to an IGON integrated time calculation process a2. Here, every time the IG switch is turned on, an IGON integration time is calculated, and the latest value is stored. Next, an integrated travel distance calculation process a3 is executed. Here, when the vehicle speed pulse signal v is input from the vehicle speed pulse signal generator 2, the vehicle speed pulse signal v is counted to calculate the integrated travel distance N, and the latest value is stored. To do. Next, the continuous travel distance calculation process a4 is executed. Here, when the vehicle speed pulse signal v is input, the continuous travel distance is calculated while the level of the vehicle speed pulse signal v is equal to or higher than the set value, and the latest value is stored. On the other hand, the pre-delivery switching routine of FIG. 4 and the post-delivery switching routine of FIG. 5 are executed in this order by interruption for a predetermined time when the IG switch 3 is turned off.
[0017]
When the pre-delivery switching routine of FIG. 4 is reached, in step s1, it is determined whether or not a post-delivery flag FLG1 for post-delivery determination is on. After delivery, the process returns, and before delivery, the process proceeds to step s2. Here, when the IG switch is on, the process is terminated, and when the IG switch is off, the process proceeds to step s3. In step s3, the latest IGON accumulated time is fetched, and it is determined whether or not this value is 10 hours or more. In the above, it is assumed that the vehicle has been delivered. In step s4, keep relay [1] 13 and keep relay [2] 14 are turned on. Switching to non-excitation, that is, the first power supply circuit 5 and the second power supply circuit 7 of both keep relays are kept in continuous conduction (ON), the post-delivery flag FIG1 is turned on, and the process returns.
[0018]
On the other hand, if the IGON accumulated time is less than 10 hours, the process proceeds to step s5, where the latest accumulated mileage N is fetched and it is determined whether or not this value is 30 miles or less. Otherwise, go to step s7. In step s6, it is determined whether or not the latest accumulated travel distance N is 90 miles or less. If it exceeds 90 miles, it is determined that the vehicle has been delivered, and the process proceeds to step s4. If it is 90 miles or less, the process proceeds to step s8. Here, the distance is from 30 miles to 90 miles, and the latest continuous mileage at the present time is taken in. It is determined whether or not this is 35 miles or more. Proceed and if less than 35 miles, proceed to step s9. Here, it is assumed that it is less than 35 miles and before delivery. However, considering the possibility after delivery, it waits for 36 hours after the IG switch is turned off. The keep relay [1] 13 and the keep relay [2] 14 are switched to excitation (on), that is, the first power supply circuit 5 and the second power supply circuit 7 of both keep relays are continuously cut off (off). Then, after delivery, the flag FIG1 is turned off (= 0), and the process returns to the main routine. In this case, it is considered that the vehicle has not been delivered. At this time, there is no need to store data in the backup memory 10 of the ECU, and the power supply to the backup memory 10 and the vehicle interior lamp 14 can be reliably cut to prevent the battery from running out. In addition, if the IG switch 3 is turned on again after 36 hours have elapsed since the IG switch was turned off, this process is canceled and the process returns to the main routine.
[0019]
Next, when it is determined in step s5 that the latest accumulated travel distance N is 30 miles or less and reaches step s7, here, the latest continuous travel distance is taken in, and it is determined whether this value is 10 miles or more. If it is more than mile, the process proceeds to step s9, considering the possibility after delivery, waiting for 36 consecutive hours after the IG switch is turned off. The power supply circuits 5 and 7 are held continuously off (off), and the process returns to the main routine. On the other hand, in step s7, if it goes below 10 miles and proceeds to step s10, it is determined that the vehicle has not been delivered, waits for 3 minutes after the IG switch is turned off, and keep relay [1] 13 and keep relay [2 ] 14 is switched to excitation (on), that is, both power supply circuits 5 and 7 of both keep relays are held continuously cut off (off), the post-delivery flag FIG1 is turned off (= 0), and the process returns to the main routine. To do. Before the vehicle is delivered, there is no need to store data in the backup memory 10 of the ECU, and the power supply to the backup memory 10 and the vehicle interior lamp 14 is surely cut early to prevent the battery from running out.
[0020]
Next, when the post-delivery switching routine of FIG. 5 is reached, in step b1, it is determined whether or not a post-delivery flag FLG1 for post-delivery determination is on, the process returns before delivery, and the process proceeds to step b2 after delivery. Here, it is determined whether or not the IG switch is off. If the IG switch is on, the process ends. If the IG switch is off, the process proceeds to step b3. In step b3, the current value signal i of the second power supply circuit 7 is detected from the current detection circuit 16, and the process proceeds to step b4 during energization and proceeds to step b5 when deenergization. In step b5, the vehicle interior lamp 6 is not energized and is turned off (off). Assuming that the vehicle interior lamp 6 is in a normal state, the keep relay [2] 14 is switched to non-excitation, and the second power supply circuit 7 is continuously turned on (ON). To cancel this power cut system and return. Note that the keep relay [1] 13 has the post-delivery flag FLG1 = 1, so that it is naturally kept switched to non-excitation (ON).
[0021]
On the other hand, when the current value signal i of the second power supply circuit 7 is detected in step b3 and step b4 is reached as being energized, here, the switching signal ds of the driver's seat door switch 8 is switched from on to off and the change is completed. If the switching change is not completed, the process proceeds to step b6. If completed, the process proceeds to step b7. Before the change of switching is completed in step b6, it is assumed that the door closing process is delayed or left halfway, and the cut waiting time is counted for 30 minutes. Otherwise, it is assumed that the driver's door switch 8 has failed, etc., the keep relay [2] 14 is held in the excited (off) state, the second power supply circuit 7 is held in the continuous cutoff (off) state, and the process returns to the main routine. To do. In this case, the vehicle interior lamp 6 that is energized is turned off, and the power supply to the vehicle interior lamp 6 is surely cut early to prevent the battery from running out. Since the vehicle is delivered and the backup memory 10 of the ECU is in use at this time, the shut-off process of the first power supply circuit 5 of the backup memory 10 is not naturally performed.
[0022]
From step b4, it is determined that the switching signal ds of the driver's seat door switch 8 has been switched from on to off, and when the process proceeds to step b7, the keep relay [2] 14 is energized after a cut waiting time of 3 minutes. The second power supply circuit 7 is kept in a continuous interruption (off) state, and the process returns to the main routine. In this case, since the occupant has detected the current value signal i even after getting off, it is considered that the passenger has forgotten to turn off the vehicle interior lamp 6, and the power supply is cut early to prevent the battery from running out. In addition, since the vehicle has been delivered and the backup memory 10 of the ECU is in use at this time, the shut-off process of the first power supply circuit 5 of the backup memory 10 is not performed.
[0023]
As described above, the vehicle battery rising prevention device 1 prevents the backup memory 10 of the plurality of vehicle electronic control units ECU in the vehicle before delivery from consuming electric power, and further, forgets to turn off the vehicle interior lamps 6 and 6. It is possible to prevent power consumption, suppress unnecessary power consumption of the battery 4, and reliably prevent a starting failure due to battery exhaustion of the vehicle.
In the above-mentioned process, the accumulated mileage area was divided into three areas of 0 to 30 miles, 30 to 90 miles, and 90 miles or more, and a cut waiting time suitable for each accumulated mileage area was set. The total travel distance area may be classified. In this case, the same effect as that of the vehicle battery prevention device 1 of FIG. 1 can be obtained.
[0024]
Further, in the vehicle battery prevention device 1 of FIG. 1, the integrated continuous travel distance is compared with the set value in both the integrated travel distance ranges of 0 to 30 miles and 30 to 90 miles (steps s7 and s9), and the vehicle has been delivered. However, in some cases, the comparison with the set value of the integrated continuous travel distance may be eliminated to simplify the power supply cut control.
[0025]
【The invention's effect】
As described above, according to the first aspect of the present invention, when the cumulative travel distance is equal to or less than the predetermined value, at least the first power cut means is driven after the set cut waiting time after the ignition key switch is turned off, to the backup memory. Therefore, in the travel distance area where the integrated travel distance is less than the predetermined value, the wasteful power supply to the backup memory can be eliminated to prevent the battery from running out. Therefore, it is possible to more reliably prevent the battery from running out. In particular, multiple accumulated travel distance areas and cut waiting times for each accumulated travel distance area are set in advance, the current travel distance area and the set cut wait time corresponding thereto are obtained, and the set cut at the current travel distance is performed. Since the first power cut means and / or the second power cut means are driven after the waiting time has elapsed, the travel distance area is divided into a large number of areas, and different power cut conditions are set for each travel distance area. The power supply cut to the backup memory and the power supply cut processing to the vehicle interior lamp can be selectively set for each mileage area, and the power supply cut suitable for each mileage area is performed to prevent battery exhaustion more reliably. be able to.
[0027]
The invention of claim 2 is particularly suitable when the signal from the driver's door opening / closing detection means and / or the signal from the current detection means is input and the elapsed time after the ignition key switch is turned off exceeds the set elapsed time. In this case, if the set cut waiting time is exceeded after the ignition key switch is turned off when the driver's door is opened or closed and / or when power is supplied to the vehicle interior lamp, The power supply to the interior lamp can be cut to prevent the battery from running out, and this process can be selectively combined with a process that eliminates wasteful power supply to the backup memory and the interior lamp according to the distance traveled. As a result, it is possible to more reliably prevent the battery from running out.
[Brief description of the drawings]
FIG. 1 is an electric circuit diagram of a vehicle battery preventing apparatus according to the present invention.
FIG. 2 is a functional block diagram of the battery rising prevention device for the vehicle in FIG. 1;
FIG. 3 is a flowchart of a main routine of a power supply switching control process used by the vehicle battery prevention device of FIG.
FIG. 4 is a flowchart of a pre-delivery switching routine of a power switching control process used by the vehicle battery prevention device of FIG. 1;
FIG. 5 is a flowchart of a post-delivery switching routine of a power source switching control process used by the vehicle battery prevention device of FIG. 1;
[Explanation of symbols]
3 IG switch 4 battery 5 first power supply circuit 6 vehicle interior lamp 7 second power supply circuit 10 backup memory A1 travel distance calculation means A2 IG switch on / off state detection means A3 first power cut means A4 second power cut means A5 driver's seat door Open / close detection means A6 Current detection means A7 Control means N Accumulated travel distance Tn Cut waiting time N Accumulated travel distance

Claims (2)

Travel distance calculation means for calculating the cumulative travel distance of the vehicle, ignition key switch on / off state detection means for detecting the on / off state of the ignition key switch of the vehicle, and a power supply circuit from the vehicle battery to the backup memory of the vehicle electronic control device A first power cut means for cutting the power supply, a second power cut means for cutting the power supply circuit from the battery to the vehicle interior lamp, and a set cut waiting time after the ignition key switch is turned off when the integrated travel distance is less than a predetermined value Control means for driving at least one of the first power cut means and the second power cut means after elapse of
The control means presets a plurality of integrated travel distance areas and a cut waiting time for each of the integrated travel distance areas, and the elapsed time after the ignition key switch is turned off is a set cut at the current integrated travel distance. vehicles of dead battery preventing device, characterized in that to drive the first power supply cutting means and or the second power supply cutting means when the lapse of the waiting time.   A driver door opening / closing detecting means for detecting opening / closing of the driver's seat door; and a current detecting means arranged in a power circuit from the battery to the vehicle interior lamp, wherein the control means detects the driver's seat door opening / closing. When the signal from the means and / or the signal from the current detection means is input, and the elapsed time after the ignition key switch is turned off exceeds a set cut waiting time, the second power cut means is driven. The battery rising prevention device for a vehicle according to claim 1.

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