JPH05227672A - Voltage tap setting decision unit for charger - Google Patents

Abstract

PURPOSE:To provide a voltage tap setting decision unit for facilitating decision of the propriety of voltage tap setting of charger. CONSTITUTION:The voltage tap setting decision unit 10 is provided with a voltmeter 11 connected with the secondary terminal 3 of a charger in order to detect the secondary voltage of the charger 1 at the time of charging operation. The voltmeter is also connected with a microcomputor 12 which compares a rising curve of secondary voltage detected through the voltmeter with a prestored rising curve of secondary voltage at the time of optimal charging for a predetermined time. Comparison result is displayed on a display 17 and a decision is made that the voltage tap is set appropriately if the rising curves match each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to charging a battery used in a battery-powered industrial vehicle or the like, and more particularly to a device for facilitating setting of a voltage tap of a charger.

[0002]

2. Description of the Related Art Conventionally, when charging a battery of a battery-powered industrial vehicle, a secondary side terminal of a charger is connected to a terminal of a battery and a primary side terminal is connected to a power source.

By the way, when the power source is a factory power source, the voltage varies depending on the installation position or the like. Therefore, in order to adjust the secondary voltage of the charger, the voltage of the power source is measured before charging, Therefore, it was necessary to select a voltage tap provided on the winding of the charger.

[0004]

However, since the number of voltage taps provided in the charger is small and an error occurs in units of 10 V, the voltage tap setting may not be appropriate in practice. . Further, whether or not the setting of the voltage tap is proper can be determined only by checking the charging state of the battery from the specific gravity and the amount of the battery liquid after the charging is completed. Therefore, when the setting of the voltage tap is not appropriate, it is necessary to switch to another voltage tap and perform the inspection such as charging and specific gravity of the battery liquid again.

As described above, in the related art, it may be necessary to carry out some time-consuming charging (usually 8 hours or more) several times in order to properly set the voltage tap, and
Laborious inspection of the specific gravity of the battery fluid is required,
There was a problem.

Therefore, an object of the present invention is to provide a voltage tap setting discriminating device for easily and properly setting the voltage tap of a charger.

[0007]

In order to achieve the above object, a voltage tap setting discriminating apparatus according to the present invention is connected to a secondary side terminal of a charger to detect a secondary voltage of the charger during charging. Secondary voltage detecting means, comparing means for comparing the rising curve of the secondary voltage detected by the secondary voltage detecting means with a pre-stored rising curve of the secondary voltage during optimum charging for a certain period of time, and , A display unit for displaying the comparison result by the comparison unit.

[0008]

In such a configuration, since it is possible to compare the rising curve of the secondary voltage during actual charging and the rising curve of the secondary voltage during optimal charging, the voltage tap setting can be made from the comparison result. You can judge suitability. That is,
If the two ascending curves substantially coincide with each other, the setting is proper, and if they largely deviate, the setting is not proper.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 is a charger and reference numeral 2 is a battery. During charging, the secondary side terminal 3 of the charger 1 and the terminal 4 of the battery 2 are connected by the connection cord 5. The primary side terminal 6 of the charger 1 is connected to the power supply 7.

A voltage tap setting discriminating apparatus 10 according to the present invention.
Is provided with a voltmeter 11 which is a secondary voltage detecting means connected to the secondary side terminal 3 of the charger 1. The detection data of the secondary voltage of the charger 1 detected by the voltmeter 11 is transmitted to the comparison means including the microcomputer 12.

The microcomputer 12 includes a voltmeter 11
The input unit 13, the central processing unit 14, and the storage unit 15 to which are connected
And an output unit 16, and the output unit 16 has a display 1
Display means such as 7 is connected. The storage unit 15 stores in advance data of the rising curve of the secondary voltage at the time of optimal charging. The stored data and the data of the charger 1 input from the voltmeter 11 at the time of actual charging are stored. The central processing unit 14 compares the detected data corresponding to the next voltage.

It is now assumed that the voltage tap of the charger 1 is arbitrarily set and charging is started. In such a case, the detection data from the voltmeter 11 of the voltage tap setting determination device 10 is sent to the central processing unit 1 via the input unit 13 of the microcomputer 12.
Input to 4. Here, the central processing unit 14 stores the storage unit 15
The storage data of is read and the storage data that matches the detection data of the secondary voltage at the start of charging is searched.

Further, when charging is carried out for a fixed time (for example, about 1 hour), the secondary voltage of the charger 1 gradually rises according to the amount of charge of the battery 2, but the central processing unit of the microcomputer 12 At 14, the detected data at that time and the data stored in the storage unit 15 are compared. FIG. 2 shows the relationship between the time and the voltage, which is displayed on the display 17, while the data during this time is replaced with the relationship between the time and the voltage.

Here, the rising curve drawn by the detection data,
When the rise curve at the time of optimal charging drawn by the stored data substantially matches, it can be considered as optimal charging, and thus the set voltage tap can also be determined to be appropriate.

On the other hand, if the actual rising curve of the secondary voltage deviates significantly upward or downward from the rising curve at the time of optimum charging, the setting of the voltage tap is not appropriate and it is necessary to switch the voltage tap. Since the voltage tap setting determination device 10 can match the detection data at the start of charging with the stored data regardless of the discharge amount of the battery 2, if the voltage tap setting is determined to be inappropriate, Immediately after the charging is stopped and the voltage tap is switched, the comparison result can be displayed on the display 17 again according to the above procedure.

In the above embodiment, both the actual rising curve of the secondary voltage and the rising curve during optimum charging are displayed on the display 1.
7, the operator determines the suitability of the voltage tap by looking at those curves, but the central processing unit 14 judges the magnitude of the deviation of the curve and displays only the suitability. It is also possible.

[0018]

As described above, according to the present invention, it is not necessary to charge the battery to the end in order to determine whether or not the setting of the voltage tap is appropriate, and the time required for the determination is greatly shortened.

Further, since it is not necessary to determine the charged state of the battery by checking the specific gravity and the amount of the battery fluid of the charged battery, no special skill is required and the voltage tap can be set very easily. Become.

Of course, it is possible to maximize the performance of the battery by properly setting the voltage tap of the charger.

[Brief description of drawings]

FIG. 1 is a block diagram schematically showing a voltage tap setting determination device for a charger according to the present invention.

FIG. 2 is a diagram showing a secondary voltage rise curve displayed on a display in the voltage tap setting determination device of FIG.

[Explanation of symbols]

 1 Charger 2 Battery 10 Voltage Tap Setting Discrimination Device 11 Voltmeter (Secondary Voltage Detection Means) 12 Microcomputer (Comparison Means) 17 Display (Display Means)

Claims (1)

[Claims] 1. A voltage tap setting discriminating device for discriminating whether or not a voltage tap of a charger is properly set, said charger being for detecting a secondary voltage of said charger during charging. A secondary voltage detecting means connected to the secondary side terminal of the secondary voltage detecting means, a rising curve of the secondary voltage detected by the secondary voltage detecting means, and a prestored rising curve of the secondary voltage at the time of optimum charging are constant. A voltage tap setting discriminating device for a charger, comprising: comparing means for time comparison and display means for displaying a comparison result by the comparing means.