JPH1126030A - Battery abnormality detecting method and device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase charging current and prevent the exhaustion of a battery by fitting a specific gravity sensor to the battery, and increasing the idle engine speed, when a control device detects a specific gravity abnormality with the signal from the specific gravity sensor. SOLUTION: Whether or not a mode selection switch manually selected by a driver is set to a normal mode selected at the time of a normal travel is judged. If the decision is YES, i.e., a normal mode, the signal of a specific gravity sensor is read, and whether or not the specific gravity value is a prescribed value or below is judged. If the decision is NO, the signal of the specific gravity sensor is read again. If the decision is YES, since it means an insufficient charge, a solenoid valve is turned on, and the idle engine speed is increased so as to increase the charging current. If the specific gravity value has not reached the prescribed upper limit value after the charging, a battery is judged to be dead, a battery replace warning is turned on to blink a warning lamp, and the control is finished.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for detecting an abnormality of a battery of a vehicle for detecting an abnormality of a battery mounted on the vehicle.

[0002]

2. Description of the Related Art There is known a technology in which a vehicle is equipped with a battery and the power of the battery drives a starter motor or the like for lighting or starting the engine.

[0003]

However, for example, when the engine is stopped in a state where the remaining capacity of the battery is low, there is a problem that the starting of the engine next time becomes difficult due to the exhaustion of the battery.

[0004] In addition, although the technique disclosed in Japanese Utility Model Laid-Open No. Hei 7-27056 is disclosed, the technique relates to a battery pack composed of a plurality of batteries and does not relate to the problem of the present application.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a battery abnormality detection method and apparatus which detects an abnormality such as a dead battery and prevents the occurrence of a problem in advance.

[0006]

According to the present invention, in a method for detecting abnormality of a battery mounted on a vehicle, a specific gravity sensor is attached to the battery and control is performed by a signal from the specific gravity sensor. There is provided a method for detecting a battery abnormality of a vehicle, wherein the device increases the idle speed of the engine when the device detects a specific gravity abnormality of the battery fluid.

Further, according to the present invention, in a vehicle abnormality detecting device for detecting abnormality of a battery mounted on a vehicle, a specific gravity sensor is attached to the battery, and the specific gravity sensor is connected to a control device of the vehicle by an electric circuit. connection,
An electromagnetic valve for controlling the idle speed of the engine and a warning lamp are connected to the control device.

The present invention is configured as described above, and is configured to warn the driver that the remaining capacity of the battery is low and increase the idle current to increase the charging current. Battery dead can be prevented. Therefore, it is possible to prevent the engine from being unable to start at the next engine start, and to maintain the operation of the auxiliary equipment such as the air conditioner, thereby contributing to the maintenance of the environment of the cab.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing the overall configuration of a battery abnormality detecting device according to the present invention. A control device 1 includes a specific gravity sensor 3 attached to a battery 2 by an electric circuit a,
A solenoid valve 4 is mounted on the electric circuit b, a warning lamp 5 is mounted on the electric circuit c, and a mode selection switch 6 is mounted on the electric circuit d.

A battery 10 as a power supply is connected to the control device.

The specific gravity sensor 3 measures the specific gravity of the battery 2 and sends a signal to the control device to make a determination.

In addition, according to the specific gravity determined as described above, the solenoid valve 4 is turned on and off by a conventionally known technique to raise and lower the idle speed of the engine. The warning lamp 5 is turned on.

The operation will be described below with reference to FIG.

In operation, first, it is determined whether or not the mode selection switch 6 manually selected by the driver is in the normal mode selected during normal driving (step S).
1) If YES, that is, if the normal mode is set, the signal of the specific gravity sensor 3 is read (step S2), and it is determined whether the specific gravity value is equal to or less than a lower limit predetermined value (step S2).
3). If NO, the process returns. If YES, the charging is insufficient by increasing the idling speed by turning on the solenoid valve 4 to increase the charging current (step S4).

If NO in step S1, that is, if it is in the post-charge mode in which the state of charge of the battery is checked after charging, the signal from the specific gravity sensor 3 is read (step S1).
5) It is determined whether or not the specific gravity value is equal to or less than the upper limit predetermined value (step S6). If the result is NO, the process returns. If the result is YES, that is, the battery does not reach the upper limit predetermined value even after charging, it is determined that the battery has reached the end of its life.

When the warning lamp 5, which indicates that the idling speed is increasing, is turned on, it is preferable to stop the engine for a while without stopping the engine immediately after the vehicle stops, and then to stop the engine. .

[0018]

The present invention is configured as described above,
The driver is warned that the remaining capacity of the battery is low, and the idle current is increased to increase the charging current, thereby preventing the battery from running out. Therefore, the operation of auxiliary equipment such as an air conditioner can be maintained, which contributes to maintaining the environment of the cab.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of the present invention.

FIG. 2 is a flowchart of control of the apparatus of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Control device 2 ... Battery 3 ... Specific gravity sensor 4 ... Solenoid valve 5 ... Warning lamp 6 ... Mode selection switch a, b, c, d ... Electric circuit

Claims (2)

[Claims] In a vehicle battery abnormality detection method for detecting an abnormality of a battery mounted on a vehicle, a specific gravity sensor is attached to the battery, and a control device detects a specific gravity abnormality of the battery fluid based on a signal from the specific gravity sensor. In this case, a battery abnormality detection method for a vehicle, comprising increasing an idle speed of an engine to increase a charging current. 2. A battery abnormality detecting device for a vehicle for detecting an abnormality of a battery mounted on the vehicle, wherein a specific gravity sensor is attached to the battery, and the specific gravity sensor is connected to a control device of the vehicle by an electric circuit. A battery abnormality detection device for a vehicle, characterized in that a solenoid valve for controlling the idle speed of the engine and a warning lamp are connected to the engine.