JPS62241733A - Vehicle controller - Google Patents

Abstract

PURPOSE:To restrain discharge of a battery by shutting a current flowing to service-use electrical equipment in case of the over discharge condition by means of a control circuit equipped with a circuit for detecting the discharge condition,a circuit for judging the over discharge condition and an ON-OFF circuit. CONSTITUTION:An over discharge detection sensor 1 comprises a hydrometer for detecting the specific gravity of a battery liquid in a battery 2. And a battery discharge condition detection circuit 4 in a control circuit 3 detects the discharge condition of the battery 2 by means of the signal from the over discharge detection sensor 1. Further, a battery over discharge condition judging circuit 5 judges whether the battery 2 is in an over discharge condition or not by means of the output from the detection circuit 4. Furthermore, an ON- OFF circuit 6 turns on or off a current from the battery 2 through the output of the judging circuit 5. Thus, the operation of service-use electrical equipment 9 such as cooler and the like is automatically stopped to restrain the discharge of the battery 2 when the battery 2 is in the over discharge condition.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a vehicle control device for preventing over-discharge of a vehicle-mounted battery.

[Conventional technology]

Conventionally, drivers have to use an ammeter that shows the charging current and discharge current of the battery installed in the vehicle, a voltmeter that shows the battery voltage, or a battery charger that lights up when the battery voltage falls below a standard value. The vehicle is operated by determining whether the battery is in an over-discharge state using a lamp or a hydrometer that detects the specific gravity of the battery fluid.

[Problem that the invention seeks to solve]

In recent years, the number of electrical components installed in automobiles, such as air conditioners, audio products, and air purifiers, has increased, and when the engine speed decreases, such as when driving in overdrive, the output of the generator decreases. However, the generator alone cannot bear the burden of using the above-mentioned electrical components, increasing the burden on the battery and causing an over-discharge state, resulting in the problem that various electrical components cannot be used.

However, in the conventional method described above, the decision as to whether the battery is in an over-discharged state is left entirely to the driver, so if the driver continues to drive the vehicle with the battery in an over-discharged state, If this happens, it becomes impossible to use various electrical equipment, and there is a risk that the battery life will be shortened or the battery will run out.

The present invention solves the above problems, and provides a vehicle control device that prevents the battery from dying, improves the battery life, and allows safety electrical equipment to operate accurately. The purpose is to

[Means for solving problems]

To this end, the vehicle control device of the present invention includes a battery discharge state detection circuit that detects the battery discharge state, a battery over discharge state determination circuit that determines the battery over discharge state based on the output of the battery discharge state detection circuit, and a battery discharge state determination circuit that determines the battery over discharge state based on the output of the battery discharge state detection circuit. A control circuit equipped with an on/off circuit that turns on and off the current between the battery and the service electrical equipment based on the output of the battery over-discharge state determination circuit turns off the electrical current between the battery and the service electrical equipment when the battery is in an over-discharge state. The feature is that the current to the product is turned off.

[Operation and Effects of the Invention] In the present invention, when the battery is in an over-discharge state, the operation of service electrical equipment such as a cooler, audio system, and air purifier is automatically stopped to suppress the discharge of the battery. This improves battery life and prevents the battery from dying. Also, since the battery will not be over-discharged, the headlights,
Electric safety equipment such as side lights and horns can be operated accurately, and the reliability of the electrical safety equipment can be improved.

〔Example〕

Examples will be described below with reference to the drawings.

FIG. 1 is a block configuration diagram showing one embodiment of the vehicle control device of the present invention, and FIG. 2 is a diagram showing a flowchart of FIG. 1. In FIG. 3 is the 11 j'8 circuit, 4 is the battery discharge state detection circuit, 5 is the battery over-discharge state judgment circuit, 6 is the on/off circuit, 7 is the electrical equipment for safety, 8 is the electrical equipment for the battery, and 9 is the electrical equipment for service. product, io indicates a voltmeter.

In FIG. 1, an overdischarge detection sensor 1 consists of a hydrometer that detects the specific gravity of battery fluid in a battery 2, and
The control circuit 3 includes a battery discharge state detection circuit 4, a battery over-discharge state determination circuit 5, and an on/off circuit 6. The battery discharge state detection circuit 4 detects the discharge state of the battery based on the signal from the over-discharge detection sensor 1, and the battery over-discharge state determination circuit 5 detects whether the battery 2 is over-discharged based on the output of the battery discharge state detection circuit 4. The on/off circuit 6 determines whether the battery is in the
It turns on and off the current from the battery 2.

On the other hand, the current from the battery 2 is supplied to the safety electrical equipment 7 and other electrical equipment 8, and is also supplied to the service electrical equipment 9 via the on/off circuit 6. The safety electrical components 7 are, for example, electrical components such as headlights, side lights, and warning horns. There are electrical components, and the service electrical components 9 are electrical components such as a cooler, audio equipment, and air purifier that are not directly related to the running of the vehicle.

Next, the operation of the above configuration will be explained with reference to the flowchart shown in FIG. If it is NO, it is returned to the battery discharge state detection circuit 4, and the on/off circuit 6 is turned on to constantly supply current to the service electrical equipment 9. If YES, that is, the battery is in an over-discharge state. In this case, the current to service electrical equipment 9 such as a cooler, audio system, and air purifier is turned off.

It should be noted that the present invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made. For example, in the above embodiment, the over-discharge state of the battery is detected by the over-discharge detection sensor 1, but it is also possible to input the output signal of the voltmeter lO, which detects the voltage of the battery, to the battery discharge state detection circuit 4. Alternatively, both the over-discharge detection sensor 1 and the voltmeter IO may be used together, and when either one or both detect an over-discharge state, a signal may be input to the battery discharge state detection circuit 4. .

As is clear from the above description, according to the present invention, when the battery is in an over-discharged state, the operation of service electrical equipment such as a cooler, audio system, and air purifier is automatically stopped, and the battery is discharged. Since I tried to hold the
It is possible to improve the battery life and prevent the battery from dying. In addition, since the battery is not over-discharged, electrical safety equipment such as headlights, side lights, and horns can be operated accurately, improving the reliability of electrical safety equipment. be able to.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of a vehicle control device of the present invention, and FIG. 2 is a diagram showing a flowchart of FIG. 1. ! ... Over discharge detection sensor, 2... Battery, 3.
...Control circuit, 4...Battery discharge state detection circuit,
5... Pantry over-discharge state judgment circuit, 6... On/off circuit, 7... Electrical equipment for safety, 8... Other electrical equipment, 9... Electrical equipment for service, 10... Voltage Total.

Claims (3)

[Claims] (1) A battery discharge state detection circuit that detects the battery discharge state, a battery over discharge state determination circuit that determines the over discharge state of the battery based on the output of the battery discharge state detection circuit, and an output of the battery over discharge state determination circuit. The control circuit includes an on/off circuit that turns on and off the current between the battery and the service electrical equipment, and turns off the current to the service electrical equipment when the battery is in an over-discharge state. Vehicle control device. (2) The vehicle control device according to claim 1, wherein the battery discharge state is detected by an overdischarge detection sensor that detects the specific gravity of the battery fluid. (3) The vehicle control device according to claim 1, wherein the battery discharge state is detected by a voltmeter that detects the battery voltage.