JPH02262853A - Voltage detecting system for battery - Google Patents

Abstract

PURPOSE:To prevent an alarm from being mis-sent due to noise, etc., by stopping the detecting action of output voltage performed prior to the start of charging when the operation of a charger begins. CONSTITUTION:When charging of a secondary battery 113 is begun, a 'READY' signal 2 stops the supervisory action of an output voltage supervisory means 115. Or, by detecting the output voltage of the secondary battery 113 at the time of power being applied on the basis of the power ON/OFF signal from a power unit 100 being placed above the means 115, if the voltage is normal, the NOT signal 1 of a signal 5 for applying power to a charger 111 stops the supervisory action of the means 115. When a signal 6 for stopping the operation of the charger 111 is outputted regularly from a supervisory control means 117 while in use, a signal 5 for reapplying power to the charger 111 is outputted again from the means 115. Accordingly, the NOT signal 1 of the signal 5 stops the supervisory action of the means 115. Accordingly, the malfunction of the secondary battery can be detected by the supervision only before power being applied to the charger 111.

Description

[Detailed Description of the Invention] [Summary] The present invention relates to a battery voltage detection method in a battery device that backs up power for electronic equipment, and the purpose is to reduce erroneous alarm sending from output voltage monitoring means provided in the battery device. and a charger that operates when the power supply device is operating to obtain a predetermined stabilized DC voltage, and a charger that is charged by this charger and supplies power in place of the power supply device when an abnormality occurs in the input power to the power supply device. the secondary battery, and output voltage monitoring means for detecting the output voltage of the secondary battery prior to the start of charging and further monitoring the output voltage during charging and during power supply; In a battery device comprising a monitoring control means that stops the operation of the main charger at a predetermined timing while charging the battery and causes the output voltage monitoring means to monitor the secondary battery, prior to the start of charging. The output voltage detection operation to be performed is configured to be suppressed at the timing when the charging operation of the charger is started.

[Industrial application field]

The present invention relates to a battery voltage detection method in a battery device that performs power backup.

With recent advances in semiconductor technology, the capacity of memory elements has been increased, and the access time to these memory elements is fast. Visual, so-called semiconductor disk devices have been put into practical use.

However, the semiconductor disk device has a large storage capacity,
For example, dynamic random access memory (DRA)
M) is used, so if an abnormality occurs in the input power supply such as a power cut, the data stored in the memory element will be destroyed. Therefore, when an abnormality in the input power supply is detected, the semiconductor disk device For example, a battery device is available that is equipped with a mechanism to switch the contents of the computer to a relatively small capacity secondary battery for saving the contents to a microdisk device.

A conventional battery device is equipped with a charger, and first detects the voltage of the secondary battery based on a power-on signal indicating that the semiconductor disk device is powered on. The charger is operated to start charging the secondary battery and function in preparation for an abnormality in the input power source.

However, even after the charger starts charging, the monitoring circuit for the secondary battery is constantly operating, and actually monitors the output of the charger, thereby preventing noise induced in the output of the battery device. There is a risk that alarms may be sent out incorrectly due to such reasons, which is a factor that reduces the reliability of the battery device.

Under these circumstances, a battery voltage detection method with higher detection accuracy has been awaited.

[Prior art and problems to be solved by the invention] FIG. 2 is a diagram illustrating a conventional battery voltage detection method.

Conventionally, electronic devices that must not stop operating due to power outages, momentary interruptions, or other input power abnormalities, such as the semiconductor disk devices mentioned above, have been equipped with battery devices 110 that use secondary batteries. Usually, it is connected in parallel to a power supply device 100 that obtains a predetermined stabilized DC voltage from a commercial power source, and is always in a charging state during operation.For example, when a power outage occurs, the operation of the charger is stopped, A predetermined DC voltage from a secondary battery 113 is supplied.

Normally, the output voltage of the battery device 110 is monitored by first turning on the power of the battery device 110 when power is applied to the entire device including the power supply device 100, that is, before starting charging. Following the confirmation of the connection state, etc., the output voltage is constantly monitored thereafter.

However, as shown in the figure, the monitoring position is between the terminals of the charger 111 and the secondary battery 113, so when the charger 111 is in a non-operating state, that is, charging starts when the power is turned on. When the power is backed up by the secondary battery 1-3, the output voltage of the secondary battery 113 is detected as the output voltage of the battery device 110, so the voltage of the secondary battery can be monitored. When the charger 111 is in operation, the output voltage of the charger 111 (usually higher than the voltage of the secondary battery) is extracted, making it impossible to monitor the status of the secondary battery 113. Therefore, in Japanese Patent Application No. 63-235595 entitled "Pantery Device," the applicant proposed a configuration of a battery device that can monitor and monitor the state of the secondary battery 113 when the battery device 110 is in a charging state. Disclosed.

The details are omitted, but to summarize, ``When the power supply device 100 is operating to obtain a predetermined stabilized DC voltage, the power supply device 100
When an abnormality occurs in the input power to the power supply device 100, when an abnormality occurs in the input power to the power supply device 100, the power supply device 1
A secondary battery 113 that supplies power instead of 00, and an output voltage monitor that detects the output voltage of the secondary battery 113 before starting charging, and further monitors the output voltage during charging and while supplying power. and a means 115 for stopping the charging operation at a predetermined timing while charging the secondary battery 113, and for stopping the charging operation at a predetermined timing, and for controlling the output voltage monitoring means. At 115,
It is configured to include a monitoring control means 117 for monitoring the secondary battery.

With this technology, the voltage of the secondary battery 113 can be monitored by periodically stopping the operation of the charger 111 even when the charger 111 is in operation, but the period is, for example, 1 to 1. The time is as short as 10 seconds, and essentially, during operation of the device, the output voltage of the battery device 110 (that is, the output voltage of the charger) is monitored while the charger 111 is connected. Therefore, there was a risk that an alarm would be erroneously sent from the output voltage monitoring circuit 115 due to noise or the like induced in the output line (2) or due to deterioration of components within the output voltage monitoring circuit 115.

In view of the above-mentioned conventional drawbacks, the present invention reduces erroneous sending of alarms from output voltage monitoring means provided in a battery device when monitoring battery voltage in a battery device that backs up power for electronic equipment. The purpose of the present invention is to provide a battery voltage detection method that can detect battery voltage.

[Means to solve the problem]

The above problem can be solved by a battery voltage detection method configured as follows.

A charger that operates when a power supply device that obtains a predetermined stabilized DC voltage is operated, and a second battery that is charged by this charger and that supplies power in place of the power supply device when an abnormality occurs in the input power to the power supply device. Detects the output voltage of the secondary battery and the output voltage of the secondary battery prior to the start of charging.
and an output voltage monitoring means for monitoring the output voltage during power supply, the operation of the charger is stopped at a predetermined timing while the secondary battery is being charged, and the output voltage monitoring means is configured to monitor the output voltage of the secondary battery. In a battery device including a monitoring control means for monitoring a battery, the output voltage detection operation performed prior to the start of charging is suppressed at the timing when the operation of the charger is started.

[Effect]

That is, according to the present invention, in a battery device that backs up power for electronic equipment, monitoring is performed only before the charger is turned on, for example, by a negative signal (2) of the power-on signal for the charger, or The "ready" signal, which indicates that the charger has started operating normally, is used to suppress the function of the output voltage monitoring means of the battery device, so that the power is not turned on to the electronic device. detecting the voltage of the secondary battery of the battery device when the charger is in operation and when the operation of the charger is stopped;
When the charger is in operation, the monitoring mechanism is inhibited;
This has the effect of suppressing erroneous sending of alarms due to noise or the like.

〔Example〕

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

FIG. 1 is a diagram showing an embodiment of the present invention, (a)
shows an outline of a configuration example of the present invention, (bl) shows a conventional operation sequence, and (b2) shows an operation sequence of the present invention.
In carrying out the present invention, means for inhibiting the output voltage monitoring means 115 by a negative signal (■) of the power-on signal for the charger 111 or a "ready" signal (■) indicating that the charger 111 has started normal operation is provided. This is a necessary measure. Note that the same reference numerals indicate the same objects throughout the figures.

Hereinafter, the battery voltage detection method of the present invention will be explained with reference to FIG.

Even if the present invention is carried out, the basic operation of monitoring the output voltage of the battery device 110 by the output voltage monitoring means 115 will be limited to the basic operation disclosed in Japanese Patent Application No. 63.23559 filed earlier by the applicant.
Since it is not particularly different from No. 5, it will be omitted, and here, based on the power on/off signal from the power supply device 100, the output voltage monitoring means 115 turns on the power to the charger 111, or the monitoring control means 117, the operation of inhibiting the output voltage monitoring means 115 each time the operation of the charger 111 is periodically stopped will be explained.

Generally, when the charger 111 is turned on and starts charging the secondary battery 113, it is in a "ready" state. The monitoring operation of the output voltage monitoring means 115 is suppressed by using the "Ready" signal ■.

Alternatively, as described above, the output voltage monitoring means 115 detects the output voltage of the secondary battery 113 when the power is turned on (power on) based on the power on/off signal from the host power supply 100, and determines whether the output voltage is normal or not. If so, focus on the fact that the signal ■ to turn on the power to the charger 111 is output, and use the negative signal ■ of this output signal to control the output power monitoring means 11.
The monitoring operation in step 5 is suppressed.

Further, as mentioned above, during operation, the monitoring control means 11
7, if the signal ■ to stop the operation of the charger 111 is outputted periodically, the output voltage monitoring means 115 outputs the signal ■ to turn on the power to the charger 111 again. Focusing on this, the monitoring operation in the output power monitoring means 115 is suppressed by using the negation signal (2) of the signal in the same way as when the power is turned on normally. Therefore, in this case, there is no need to provide any new circuit means.

Therefore, the conventional battery voltage detection operation sequence is (
bl) As shown in the figure, the output voltage of the battery device 110 was monitored even after the charger 111 was powered on, whereas in the case of the present invention, as shown in the figure (b2), the output voltage of the battery device 110 was monitored. As described above, an abnormality in the secondary battery 113 can be detected by monitoring only before the charger 111 is powered on, and erroneous alarm sending is reduced.

As described above, the battery voltage detection method of the present invention includes a charger for the secondary battery for backing up the power from the secondary battery when the input power to the electronic equipment becomes abnormal. When the power is turned on, or
During operation, the power supply to the charger is controlled periodically, and when the power supply is turned on.

And, in a battery device equipped with a mechanism for detecting an abnormality in the output voltage of the secondary battery even during operation, the battery device is characterized in that the output voltage of the battery device is monitored only before power is applied to the charger. There is.

〔Effect of the invention〕

As described above in detail, the battery voltage detection method of the present invention includes a charger that operates when a power supply device that obtains a predetermined stabilized DC voltage, and a battery that is charged by the charger,
When an abnormality occurs in the input power to the power supply, the secondary battery supplies power instead of the power supply, and the output voltage of the secondary battery is detected prior to the start of charging. , an output voltage monitoring means for monitoring an output voltage while power is being supplied, the operation of the charger is stopped at a predetermined timing while the secondary battery is being charged; In the battery device, the output voltage detection operation performed prior to the start of charging is suppressed at the timing when the charging operation of the charger is started. Therefore, when the power is turned on to the electronic device, when the charger stops operating in the operating state, the voltage of the secondary battery of the battery device is detected, and when the charger returns to the operating state. This has the effect of suppressing the monitoring mechanism and preventing erroneous alarms from being sent out due to noise or the like.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an embodiment of the present invention. FIG. 2 is a diagram explaining a conventional battery voltage detection method. It is. In the drawing, 100 is a power supply device, and 110 is a battery device. 111 is a charger, and 113 is a secondary battery. 115 is an output voltage monitoring means. 117 is a monitoring control means. ■ is a negative signal of the power-on signal to the charger. ■ is the charger's "ready" signal. ■ is the output line of the battery device. ■ is a power-on signal to the charger. ■ is a signal to stop the charger operation. are shown respectively. (bl) (b2) A diagram showing an embodiment of the present invention Figure 1 (Part 2) (Part 1) Figure 2 explaining the conventional battery voltage detection method

Claims (1)

[Claims] A charger (111) that operates when a power supply device (100) that obtains a predetermined stabilized DC voltage;
), and when an abnormality occurs in the input power to the power supply device (100), the power supply device (100)
A secondary battery (113) supplies power in place of the secondary battery (113), detects the output voltage of the secondary battery (113) before starting charging, and monitors the output voltage during charging and while supplying power. output voltage monitoring means (115), which stops the operation of the charger (111) at a predetermined timing while the secondary battery (113) is being charged; In a battery device (110) equipped with a monitoring control means (117) for monitoring the next battery, the output voltage detection operation performed prior to the start of charging is performed when the charging operation of the charger (111) is started. This battery voltage detection method is characterized by being suppressed at the timing when