JPH02246734A - Power unit and electrical equipment provided with the power unit - Google Patents

Abstract

PURPOSE:To prevent the damage of an equipment due to a battery failure by dividing batteries into a plurality of parts the numbers of batteries are almost equal to each other, and separately measuring the voltage of each part, by comparing each measured voltage with a set point and by generating a signal and performing a display corresponding to the signal, when a specified relation is recognized between the set point and each measured voltage. CONSTITUTION:The terminal voltage of a battery 18 is measured always or intermittently by a measuring means. In this case, a series-connected battery 18 is divided into a plurality of parts and the voltage of each part is separately measured by the measuring means. Therefore, when the voltage value is compared with a set point (a) by a comparing means and there is a certain relation between the voltage value and the set point (a), e.g. the voltage value of each part is less than the set point (a) or the difference voltage between respective parts is extraordinarily large, a display corresponding to the stage is performed by a display means so that an operator is informed of the state of the battery 18. Thus, it is possible to prevent the failure accident of an equipment due to the gas leakage, etc., of the battery 18.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a power supply device equipped with a battery as a power supply source and an electric mister equipped with the power supply device, which is particularly capable of detecting battery abnormalities. Regarding.

[Prior Art J] Conventionally, this type of power supply device detects the open-circuit voltage of series-connected batteries or the terminal voltage when driving a load, and determines that the battery life has reached its end when the voltage value falls below a set value. , it was common to have a display prompting you to replace or charge the battery.

[The invention is about to be decided! ] However, in such a method, if all the batteries are consumed uniformly, the battery life can be detected.
Even if a small number of batteries are included inside the battery with abnormally high resistance compared to other batteries, it is difficult to detect an abnormality, and if this condition is left untreated, gas leakage or electrolyte leakage may occur from the batteries. However, there were problems that could cause damage or failure of the equipment used.

・As a result of considering this problem, the present inventor found that
A battery in which a potential reversal has occurred can be electrically considered as a mere resistance. Therefore, by dividing the series-connected batteries into multiple parts, measuring the voltage individually, and comparing the voltage values of each part with each other, it is possible to determine the battery life. It was found that abnormalities can be easily determined.

The present invention was made based on such knowledge, and
It is an object of the present invention to provide a power supply device that can detect not only battery life but also battery abnormalities using a relatively simple method.

The present invention further provides that when a battery abnormality is detected, the load's anH
By automatically limiting the
It is an object of the present invention to provide an electrical device that can prevent scratches in ``a''.

[Means for Solving the Problems] The power supply device according to the present invention has a plurality of batteries 11 connected in 164 rows (and
Measuring means that divides the M battery 18 into a plurality of approximately equal parts g) to enable individual measurement of the electric bars of each part, and compares each measured voltage with a set value to determine a predetermined relationship between the set value and the set value. The comparison means generates a signal when it is recognized, and the display means provides a display corresponding to the signal from the comparison means.

In the comparison means described above, the voltage of each part is set (it
It is preferable to conduct a battery life test (m), which compares the battery life with a, and a battery abnormality test, which compares the differential voltage of each part with a set value.

On the other hand, the electrical equipment according to the present invention includes a load 35 using the battery 18 as a driving source in addition to the above-described power supply device.
This is to stop part or all of the song a.

The j1 load 35 is preferably a display device that displays data corresponding to data sent from the outside.In such a configuration, the display device also serves as the display means described above, and when a battery abnormality is detected, the display It is possible to stop operations inherent to the device, such as updating display data or receiving data.

[Operation] With the above configuration, the measuring means constantly or intermittently
Measure the terminal voltage of battery 18.

Here, the batteries connected in series are divided into a plurality of parts, and the voltage of each part is measured individually by the measuring means, so this voltage value is compared with the set value by the comparing means, and a certain relationship with the set value is determined. For example, if the voltage value of each part is lower than a set value or if the voltage difference between each part is abnormally large, the operator is informed of the state of the battery 18 by displaying a display corresponding to the state.

When the power supply device having the configuration described above is housed in an electric appliance, the power consumption by the battery 18 can be reduced by stopping the power supply to the load 35 at the same time that the comparison means detects a battery abnormality. Even if an operator overlooks a battery abnormality, damage to the A device 3 due to gas leakage from the battery can be prevented.

[Example] An example in which the present invention is implemented in a display device will be shown below, but it is of course possible to implement the present invention in substantially the same way in various electrical devices that constitute a power supply device alone or use a battery as a power source. It is.

The display device embodying the present invention, as shown in its overall configuration in FIG. It is made changeable.

The electric circuits housed in the main body case 11 include a WlW and a part lO that supply power to each part, a control part 12 that controls the operation of the entire device, a display part 13 that displays data at 7Frng, and a display part 13 that displays data at 7Frng. It is composed of a data input section 14 that enables input of data to be displayed in the section 13, a detection section 15 that measures the voltage of the power supply section IO, and a switching section 16 that regulates the timing of energization to each section.

The control unit 12 is equipped with a central processing unit (CPU), ROM, or RAM, and executes the operating procedures described later with a program. Data 9! ! ! After performing the cry, a display is made on the display section 13.

The display section 13 is an electrochromic display element (hereinafter referred to as "EC1") configured according to the content to be displayed.
) 16, and a drive circuit 17 that generates a drive voltage for the ECD element 16 in accordance with display data sent from the control unit 12. Normally, the memory effect of the ECD element 1G is used to turn off the power to the ECD element 16 to maintain the display, and only when the display content needs to be changed, the switching unit 1G is turned on to operate the drive circuit 17. At the same time, the ECD element 16 is energized from the drive circuit 17,
The coloring position of the element 16 is changed.

The data input unit 14 utilizes various input stages such as a receiving circuit that allows data to be input from a remote location in a wireless state or a keyboard that allows direct input, and is connected to the switching unit 16 intermittently. It is powered, activated, and accepts data input. When the data input from the human power section 14 is detected by the control section J2, the control section 12 performs a predetermined process, supplies power from the switching section 16 to the drive circuit 17, and changes the display content of the ECD element 16 into a punch. Perform normal data display operations.

The present invention interrupts the normal data display operation described above at regular intervals, checks the state of the power supply section 10 according to the procedure shown in FIG. 3, and performs predetermined processing corresponding to the detected state. It is characterized by its composition.

The power supply unit 10 is composed of a plurality of batteries 18 connected in series, and in this embodiment, 1.5V dry batteries are connected to each other in series.
They are connected in series so that a voltage with an R height of 13.5V can be applied. W! The batteries 18 connected in series are 311
1 each into three parts A-I3-C, connect both ends of the whole connected in series and 2V points between each part A-B and B-C, a total of 4V points, to the input side of the detection unit 15, and connect the power supply. Part l
This is the potential detection position at O.

When the subroutine for detecting the battery state shown in FIG. The voltage value for the terminal is analog-to-digital converted and sent to the rrpItJ# section 12 (step 21).

Here, the final IL voltage of the battery 18 is set to 1. When set to OV, three batteries 18 are connected in series to each part A, B, and C, so if the voltage falls below 3V, the battery life is expected to expire. Therefore, in step 22, three parts A-11-
The voltage values of C are checked, and if all are equal to or higher than the set value a of 3V, the power supply unit 10 determines that it is normal, moves to step 23, and completes the series of detection operations.

On the other hand, if it is determined in step 22 that the value is below the set value a, then in step 24 the number of parts that are less than the set value a is more than half of the total, and there are also two or more parts. If it is determined that the voltage is 3 V or less at the same time, it is determined that the battery life has expired, and after this display is performed on the display section 13 in step 25, the operation returns to normal operation as a display device.

Conversely, in step 24, less than half, that is, only one
If it is determined that it is less than or equal to v, step 2G
Find the voltage difference between the maximum and minimum values. Here, if battery J8 drops the voltage due to normal gravitational consumption, all the batteries will drop the voltage equally, and even if there is some variation in the voltage value for each battery, the voltage for three batteries will be less than LV at most. . On the other hand, if there is an abnormality in the battery, the battery can be regarded as a resistance, and therefore the measured voltage of the portion including the abnormal battery shows a value as low as that of one battery or more.

Therefore, in step 27, it is checked whether the differential voltage is smaller than the set value l~1.5V, and if it is smaller, it is determined that the battery life has expired, and in step 28, it is displayed on the display section I3, and then jl! Normal operation returns, but if it is large, it can be determined that the battery is abnormal, so in step 29, after displaying the battery abnormality on the display section 13, a signal is sent to the switching section 16, and the drive circuit 17 and data input section 14 To'! At the same time, by cutting off the FI power and restricting functions as a display device such as data input or data updating, battery abnormality is displayed to the operator in a 1ft area.

This is to reduce power consumption as much as possible, and to prevent accidents such as leakage of battery 18 from occurring due to battery abnormality indications being left unnoticed.

FIG. 4 shows another embodiment of the present invention, in which the detection section 15 is equipped with not only a battery voltage measuring means but also a comparing means for comparing the measured voltage with a set value, and each part in the power supply section IO. The configuration is such that a signal is sent to the control section 12 only when the voltage of the control section 12 falls below a set value. With this configuration, the control unit 1
In step 2, the presence or absence of a signal output from the detection unit 15 is checked at a fixed period of, for example, every second, and only when it is confirmed that a signal is input, the processing from step 24 onward in FIG. 3 is executed. By the way, vinegar! This reduces the data processing burden on Yoto 12.

FIG. 5 shows still another embodiment, in which a relay circuit 34 is interposed between the detection section 15 and the power supply section IO. The relay circuit jfi 34 is provided with a relay between a potential measuring terminal provided between the batteries 18 and an input terminal of the detecting section 150, and can be turned on and off individually by the control section 12, The relay circuit 34 causes the power supply section 1 to be activated by the detection section 15.
0 potential side localization: Slow is selected, and the measured voltage value is selectively sent to the control unit 12, so that substantially the same processing as in the case of adding two is performed.

Note that the number of batteries 18 included in the power supply section 10, the connection method, or the detection position of the battery potential can be changed as appropriate. If the number of batteries in each part is different, the voltage may be converted to a voltage per predetermined number of batteries and compared with the set value.

Further, the display means in the display section 13 may also be a liquid crystal or 7.
You can do 2 [such as ED etc.] as appropriate.

[Effects of the Invention] The present invention has the following advantages as described above. [1 Wl pond 1 provided in the source section 10
8 is divided into a plurality of parts, and the voltage of each part is measured and compared with the set value to detect the state of the battery 18. Therefore, with a relatively simple configuration, it is possible to detect not only the lifespan of the battery 18, but also the lifespan of the battery 18.
It is also possible to detect abnormalities in batteries that have caused potential reversals and notify the user.

Furthermore, when an abnormality in the battery 18 is detected, the load 3 is automatically
By limiting the a function of No. 5, it is possible to prevent accidents such as battery leakage, which are likely to occur if the battery is used with an abnormality.

In addition, when implemented in a data display device, the data display section 1
3, battery abnormalities can be displayed at the same time, there is no need to provide a separate display means, and the overall layout is simplified, which has many advantages.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing the basic configuration of the present invention, tn2 diagram and FIG. 3 show an example in which the present invention is implemented in a data display device, FIG. is a flowchart explaining the operation. FIGS. 4 and 5 are block diagrams showing other embodiments of the present invention. 10... Power supply unit, 12... Control unit, 13... Display unit, 15... Detection unit, 18... Battery, 35... Load. Inventor: Kenji Atsuki Dyed Valve Japanese style Ken Yokoyama Fig. 1 Fig. 2 X11 body case

Claims (1)

[Scope of Claims] 1. A plurality of batteries connected in series, a measuring means that divides the battery into a plurality of substantially equal parts, and makes it possible to measure the voltage of each part individually; A power supply device comprising a comparison means that compares a voltage with a set value and generates a signal when a predetermined relationship with the set value is found, and a display means that displays a display corresponding to the signal from the comparison means. 2. The power supply according to claim 1, wherein the comparison means performs a battery life test by comparing the voltage of each part with a set value a, and a battery abnormality test by comparing the differential voltage of each part with a set value b. Device. 3. A plurality of batteries connected in series, a means for dividing the battery into a plurality of approximately equal parts and making it possible to measure the voltage of each part individually, and setting each of the measured voltages of each part to a set value a. and a battery abnormality test that compares the differential voltage of each part with the set value b, and when a predetermined relationship with the set value is found, a comparison means that generates a signal, and a comparison means that generates a signal. An electrical device that is equipped with a display means that displays a display corresponding to a signal from a battery, and a load that is driven by a battery, and that stops some or all of the functions of the load when a battery abnormality is detected by the comparison means. 4. The load is a display device that performs a display corresponding to data sent from the outside, and the display device also serves as the above-mentioned display means, and when a battery abnormality is detected, it performs a specific operation as a display device. The electrical equipment according to claim 3, wherein the electrical equipment stops.