JP2000047759A - Electronic device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To prevent the performance deterioration due to over-discharge of a storage battery and to execute the processing operation immediately before termination without fail. A storage battery (1) for supplying power to a peripheral circuit (15).
1, a changeover switch 12 for connecting or disconnecting between the storage battery 11 and the peripheral circuit, and a voltage detection circuit 13 for detecting a voltage of a discharge voltage of the storage battery 11 and outputting a voltage drop signal when the detected voltage is lower than a predetermined voltage. When this voltage drop signal is detected, processing immediately before termination to peripheral circuits is started,
A control circuit 14 for outputting an open control signal after the completion of the immediately preceding processing operation, a switch control circuit 18 for controlling the changeover switch 12 so as to disconnect between the storage battery and the peripheral circuit in accordance with the open control signal; A timer is started for a predetermined time in response to the signal, and when the timer expires, a timer monitoring unit 19 that outputs an open control signal.
And

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device having a function of stopping the power supply operation of a storage battery when the discharge voltage of the storage battery falls below a predetermined voltage during power supply from the storage battery used during a power outage, for example. About.

[0002]

2. Description of the Related Art An electronic device such as a portable personal computer or a base station of a wireless communication system has a built-in storage battery. When the portable personal computer is carried, a stable power is supplied from the built-in storage battery for a predetermined time. The base station is configured to be able to supply stable power from a built-in storage battery for a predetermined time during a power outage.

[0003] On the other hand, since the capacity of these storage batteries is limited, in an electronic device incorporating these storage batteries,
It has a built-in voltage monitoring circuit that monitors the discharge voltage of the storage battery. When the voltage monitoring circuit detects that the discharge voltage of the storage battery has fallen below a predetermined voltage, the operation of the main circuit that receives power from the storage battery is terminated, and Then, a data backup process or the like is executed, and after these processes are completed, the storage battery is released from the load.

FIG. 4 is a block diagram showing a schematic configuration inside a conventional electronic apparatus having such a storage battery opening control function.

In the electronic device shown in FIG. 4, reference numeral 41 denotes a storage battery incorporated in an electronic device such as a portable personal computer or a base station of a wireless communication system. The power of the storage battery 41 is supplied via a changeover switch 42 comprising a semiconductor element or the like. And supplied to the internal circuit of the electronic device.

The storage battery 41 is connected to a voltage detection circuit 43 for detecting the discharge voltage of the storage battery 41 via a changeover switch 42. The voltage detection circuit 43 detects the discharge voltage of the storage battery 41 and, when detecting that the discharge voltage has dropped to a first detection voltage (for example, 7.4 V) or less, sends the first detection voltage to the control circuit 44. When the supply voltage is detected and the discharge voltage drops to a second detection voltage (for example, 7.2 V) or less, a switch control circuit 48 that controls the switching of the changeover switch 42 is used as the second detection voltage.
To be supplied.

Further, a peripheral circuit 45, a display unit 46, and a memory 47 are connected to the control circuit 44.

[0008] For example, when the discharge voltage of the storage battery 41 is equal to or higher than the first detection voltage, the switch control circuit 48 holds the changeover switch 42 in the ON state.
1 is supplied to the control circuit 44 including the internal circuit of the electronic device.

At this time, the voltage detection circuit 43 detects and monitors the discharge voltage of the storage battery 41,
1 is supplied to the control circuit 44. When the control circuit 44 recognizes that the discharge voltage of the storage battery 41 has dropped to the first detection voltage (for example, 7.4 V) according to the first detection voltage from the voltage detection circuit 43, the control circuit 44 A predetermined processing operation is completed, and a backup process for storing processed main data in a memory 47 such as a hard disk is executed.

Thereafter, when the voltage detection circuit 43 detects that the discharge voltage of the storage battery 41 has dropped to a second detection voltage (for example, 7.2 V), the switch control circuit 48
Turns off the changeover switch 42 according to the second detection voltage, and cuts off the power supply from the storage battery 41 to the circuit unit.

As described above, according to the conventional electronic device, when the discharge voltage of the storage battery 41 becomes lower than the second detection voltage, the discharge of the storage battery 41 is automatically stopped.
Performance degradation due to overdischarge of the storage battery 41 can be prevented.

[0012]

However, according to the above-mentioned conventional electronic device, when the discharge voltage of the storage battery 41 becomes equal to or lower than the first detection voltage (7.4 V), the processing operation immediately before the end of the backup processing or the like is executed. Further, when the discharge voltage of the storage battery 41 falls below the second detection voltage (7.2 V), the changeover switch 42 is turned off via the switch control circuit 48 to automatically stop the discharge of the storage battery 41. However, when the second detection voltage is detected, the storage battery 4
Since the power supply from the power supply 1 is forcibly stopped, if the processing immediately before the termination by the control circuit 44 is not completed until the first detection voltage changes to the second detection voltage,
The first problem is that the main data cannot be backed up at the next power-on.

Further, according to the conventional electronic device, when the control circuit 44 goes out of control, a predetermined process for the peripheral circuit 46 and a data backup process cannot be performed. Is continued until the voltage becomes equal to or lower than the second detection voltage (7.2 V), which leads to performance deterioration due to overdischarge of the storage battery 41, which has a second problem.

The present invention has been made in view of the above-mentioned first problem, and a first object of the present invention is to prevent a deterioration in performance due to overdischarge of a storage battery and reliably perform a processing operation immediately before termination. It is to provide an electronic device that can be executed.

Further, the present invention has been made in view of the above-mentioned second problem, and a second object thereof is as follows.
An object of the present invention is to provide an electronic device capable of reliably preventing performance degradation due to unnecessary overdischarge of a storage battery even when a control circuit runs away.

[0016]

In order to achieve the first object, an electronic device according to the present invention comprises: a power storage means for supplying power to peripheral circuits; and a discharge voltage of the power storage means. When the voltage falls below a predetermined voltage, a voltage drop detecting means for outputting a voltage drop signal, and when the voltage drop signal is detected, starts a processing operation immediately before termination to peripheral circuits, and outputs an open control signal after completion of the processing operation immediately before termination. It has a control means for outputting, and a power storage connection means for stopping power supply to peripheral circuits by the power storage means in response to the opening control signal.

Therefore, according to the electronic device of the present invention, when a voltage drop signal notifying that the discharge voltage of the power storage means is equal to or lower than the predetermined voltage is detected, the processing immediately before the termination to the peripheral circuit is started. Since the power supply to the peripheral circuit by the power storage means is stopped after the completion of the immediately preceding processing operation,
The processing operation immediately before termination can be reliably executed while preventing performance degradation due to overdischarge of the power storage means.

According to the electronic apparatus of the present invention, in order to achieve the second object, in addition to the configuration of the electronic apparatus, a timer for a predetermined time is started in response to a voltage drop signal from a voltage drop detecting means. When the timer expires, a timer monitoring means for outputting the release control signal is provided.

Therefore, according to the electronic apparatus of the present invention, regardless of whether or not the processing immediately before the end is completed, when the voltage drop signal is detected, the timer is started for a predetermined time. Since the power supply to the peripheral circuit is stopped, even if the control means goes out of control, it is possible to reliably prevent performance degradation due to unnecessary overdischarge of the power storage means.

[0020]

An electronic device according to a first aspect of the present invention detects power storage means for supplying power to a peripheral circuit, and a discharge voltage of the power storage means, and when the detected voltage falls below a predetermined voltage, A voltage drop detecting means for outputting a voltage drop signal; a control means for starting a processing immediately before termination to peripheral circuits upon detection of the voltage drop signal; outputting a release control signal after completion of the processing immediately before termination; Power storage connection means for stopping power supply to peripheral circuits by the power storage means in response to an opening control signal.

The electronic device corresponds to, for example, a base station of a wireless communication system or a device such as a portable personal computer having a built-in storage battery.

The power storage means corresponds to a storage battery that supplies power to peripheral circuits by discharging the power storage means when power supply is required due to, for example, a power failure.

The voltage drop detection means corresponds to a voltage detection circuit which detects a discharge voltage of the power storage means and outputs a voltage drop signal when the discharge voltage falls below a predetermined voltage (for example, 7.4 V or less). Things.

The control means corresponds to a control circuit which, upon detecting the voltage drop signal, starts a processing immediately before termination to peripheral circuits and outputs an opening control signal after completion of the processing immediately before termination.

The processing operation immediately before the end is when the power supply is O
This corresponds to a processing operation on the device side to be performed before the FF is performed, for example, a backup process.

The power storage connection means corresponds to a switch control circuit for stopping power supply to peripheral circuits by the power storage means in response to the open control signal.

Therefore, according to the electronic device of the first aspect of the present invention, when a voltage drop signal notifying that the discharge voltage of the power storage means is equal to or lower than the predetermined voltage is detected, the processing immediately before termination to the peripheral circuit is performed. Since the power supply to the peripheral circuit by the power storage means is stopped after the completion of the processing operation immediately before the start, the processing operation immediately before the end is reliably executed while preventing performance deterioration due to overdischarge of the power storage means. Can be.

According to a second aspect of the present invention, there is provided an electronic apparatus comprising: a power storage means for supplying power to peripheral circuits; and a switching means for connecting or disconnecting the power storage means and the peripheral circuits. Detecting the voltage of the discharge voltage of the power storage means, and when the detected voltage is equal to or less than a predetermined voltage,
A voltage drop detecting means for outputting a voltage drop signal; a control means for starting a processing immediately before termination to peripheral circuits upon detection of the voltage drop signal; outputting a release control signal after completion of the processing immediately before termination; And a power storage connection means for controlling a switching means to disconnect between the power storage means and the peripheral circuit in response to an open control signal.
The description of the same configuration and operation as those of the electronic device according to claim 1 will be omitted.

The switching means corresponds to a switching switch for performing ON / OFF control between the power storage means and peripheral circuits according to the open control signal.

The difference between the electronic device according to the first aspect and the electronic device according to the second aspect is that the discharge to the peripheral circuit by the power storage means is controlled in a hardware manner by ON / OFF operation of a changeover switch. On the point.

Therefore, according to the electronic device of the second aspect of the present invention, when a voltage drop signal notifying that the discharge voltage of the power storage means is equal to or lower than the predetermined voltage is detected, the processing immediately before termination to the peripheral circuit is performed. Since the power supply to the peripheral circuit by the power storage means is stopped by controlling the switching means after the start and the operation immediately before the end of the operation, the power storage means is prevented from deteriorating in performance due to overdischarging of the power storage means. The operation can be executed reliably.

The electronic device according to a third aspect of the present invention, in addition to the configuration according to the first or second aspect, starts a timer for a predetermined time in response to a voltage drop signal from the voltage drop detection means, A timer monitoring means for outputting the release control signal when the timer expires is provided.

The timer monitoring means starts a timer for a predetermined time in response to the voltage drop signal, and when the timer expires, outputs a release control signal for stopping power supply to the peripheral circuit by the power storage means. It corresponds to a monitoring unit.

Therefore, according to the electronic device of the third aspect of the present invention, in addition to the effect of the first or second aspect, when the voltage drop signal is detected irrespective of whether the process immediately before the end is completed or not. When the timer starts for a predetermined period of time and the timer expires, the power supply to the peripheral circuit by the power storage means is stopped. Therefore, even if the control means goes out of control, the performance due to unnecessary overdischarge of the power storage means is reduced. Deterioration can be reliably prevented.

In the electronic device according to a fourth aspect of the present invention, in addition to the configuration according to the first or the second aspect, the predetermined time is set so that the processing time from the start to the completion of the immediately preceding processing operation is sufficient. It is characterized by the expected time.

In the electronic device according to a fifth aspect of the present invention, in addition to the configuration according to the third aspect, the predetermined time is a time that allows for a sufficient processing time from the start to the completion of the processing operation immediately before the end. There is a feature.

The time when the processing time from the start to the completion of the processing operation immediately before the end is sufficiently taken into consideration corresponds to the time when it can be determined that the control means is out of control.

Therefore, in the electronic device according to the present invention, in addition to the effects described in the first, second, or third aspect, an unnecessary excess of the power storage means is provided regardless of the state of the control means. Performance degradation due to discharge can be reliably prevented.

According to a sixth aspect of the present invention, there is provided the electronic device according to the first, second or fifth aspect.
The immediately preceding termination processing operation is a processing operation of storing backup data relating to the peripheral circuit in a storage unit.

In the electronic device according to a seventh aspect of the present invention, in addition to the configuration according to the third aspect, the immediately preceding termination processing operation is a processing operation for storing backup data relating to the peripheral circuit in storage means. There is a feature.

According to an eighth aspect of the present invention, in addition to the configuration of the fourth aspect, the immediately preceding termination processing operation is a processing operation of storing backup data relating to the peripheral circuit in storage means. There is a feature.

Therefore, according to the electronic device according to the sixth, seventh or eighth aspect of the present invention, the first, second or fifth aspect of the present invention can be applied.
In addition to the effects of the third and fourth aspects, the power supply to the peripheral circuit by the power storage means is stopped after the backup processing operation for storing the backup data in the storage means is completed. Based on this, the next processing operation after the power was turned on was improved.

According to a ninth aspect of the present invention, in addition to the configuration according to the first, second, fifth, seventh, or eighth aspect, the electronic device is connected to a communication network of a wireless line system via a communication line. Applied to a base station, the power storage means starts power supply to peripheral circuits when a power failure occurs in the base station.

An electronic device according to a tenth aspect of the present invention, in addition to the configuration according to the third aspect, is applied to a base station connected to a communication network of a wireless line system via a communication line, and the power storage means is provided. Power supply to peripheral circuits is started when a power failure occurs in the base station.

An electronic device according to an eleventh aspect of the present invention, in addition to the configuration according to the fourth aspect, is applied to a base station connected to a communication network of a wireless line system via a communication line. Power supply to peripheral circuits is started when a power failure occurs in the base station.

An electronic device according to a twelfth aspect of the present invention, in addition to the configuration according to the sixth aspect, is applied to a base station connected to a communication network of a wireless line system via a communication line. Power supply to peripheral circuits is started when a power failure occurs in the base station.

The wireless line system comprises, for example, a communication network such as a communication control center having an exchange and the like, and a base station and the like which are wirelessly connected to a mobile station.

Accordingly, claims 9 and 10 of the present invention
According to the electronic device according to the eleventh or the twelfth aspect, the first aspect,
In addition to the effects described in 2, 5, 7 or 8, 3, 4 or 6,
Since the base station is applied so that power supply from the power storage means to peripheral circuits is started at the time of power failure, even if the base station loses power, the processing operation immediately before termination is performed while preventing performance degradation due to overdischarge of the power storage means. Can be executed reliably.

Further, even if the control means runs away,
Performance degradation due to unnecessary overdischarge of the power storage means can be reliably prevented.

In the electronic device according to a thirteenth aspect of the present invention, in addition to the configuration according to the ninth aspect, the immediately preceding termination processing operation includes an alarm notification for notifying the communication network side of a voltage drop of the power storage means. Operation.

In the electronic device according to a fourteenth aspect of the present invention, in addition to the configuration according to the tenth, eleventh, or twelfth aspect, the just-before-end processing operation is to notify the communication network side of a voltage drop of the power storage means. It is an alarm notification operation.

The alarm notification operation is, for example, for notifying the communication control center on the communication network side of a decrease in the discharge voltage of the power storage means on the base station side.

Therefore, claim 13 or claim 1 of the present invention.
According to the electronic device of the fourth aspect, the above-mentioned claim 9 or 10,
In addition to the effects described in 11 or 12, in addition to notifying the communication control center that the base station has lost power, the base station has been operated by the built-in power storage means, and the discharge voltage of the power storage means has dropped, Can be dispatched quickly to the base station location. That is, it is possible to improve the maintenance management work of the base station on the communication control center side relating to the reduction of the discharge voltage of the power storage means.

In the electronic device according to a fifteenth aspect of the present invention, in addition to the configuration according to the ninth aspect, the immediately preceding termination processing operation includes an alarm notification for notifying the communication network side of a voltage drop of the power storage means. The present invention is characterized in that an operation is executed, and a receiving operation of a response completion notification from the communication network side is performed to notify that the alarm has been responded on the communication network side.

In the electronic device according to a sixteenth aspect of the present invention, in addition to the configuration according to the tenth, eleventh, or twelfth aspect, the immediately preceding termination processing operation includes reducing a voltage drop of the power storage means on the communication network side. The present invention is characterized in that an alarm notification operation for notifying is executed, and an operation of receiving a response completion notification from the communication network side is executed to notify that the alarm is responded on the communication network side.

The alarm notification operation is, for example, notifying the communication control center on the communication network side of the decrease in the discharge voltage of the power storage means on the base station side. The response completion operation is, for example, the communication control center on the communication network side. This corresponds to an operation of notifying that the center has responded to the alarm notification operation of the base station.

Therefore, claim 15 or claim 1 of the present invention.
In the electronic device according to the sixth aspect, in addition to the effect according to the ninth, tenth, eleventh or twelfth aspect, the base station is powered off, the base station is operated by the built-in power storage means, and the discharge voltage of the power storage means is reduced. Not only can the communication control center be notified that the operation has been performed, but also maintenance personnel and the like can be dispatched to the installation location of the base station quickly. In other words, it is possible to ensure the maintenance management of the base station on the communication control center side related to the reduction of the discharge voltage of the power storage means, and to improve the maintenance management work.

Hereinafter, embodiments of the electronic device of the present invention will be described with reference to the drawings. (Embodiment 1) FIG. 1 shows a first embodiment of the electronic device of the present invention.
FIG. 3 is a block diagram showing a schematic configuration inside the portable personal computer shown in the embodiment.

In FIG. 1, reference numeral 11 denotes a storage battery incorporated in a portable personal computer. The power of the storage battery 11 is supplied to a circuit section (not shown) of various functions constituting the portable personal computer via a changeover switch 12 comprising a semiconductor element or the like.
It is configured to be supplied to.

A voltage detection circuit 13 for detecting the discharge voltage of the storage battery 11 is connected to the storage battery 11 via a changeover switch 12. This voltage detection circuit 13 is connected to the storage battery 1.
When the discharge voltage of the first unit becomes equal to or lower than a predetermined voltage (for example, 7.4 V), this power is supplied to the control circuit 14 and the timer monitoring unit 19 as a voltage drop signal. Further, the control circuit 14 includes a peripheral circuit 15, a display unit 16, and a storage device 1 such as an EEPROM or a hard disk.
7 is connected, and further, a switch control circuit 18 that controls opening and closing of the changeover switch 12 is connected.

The control circuit 14 includes the voltage detection circuit 1
When the voltage drop signal is detected from the third circuit unit 3, the storage unit 17 executes predetermined emergency processing of the peripheral circuit 15 including the above-described circuit unit, backup processing of the processed data, and the like.
Further, the control circuit 14 determines whether processing operations such as predetermined emergency processing and backup processing have been completed,
When these processing operations are completed, the storage battery open signal 14a is sent to the switch control circuit 18 to turn off the changeover switch 12.

A timer monitor 19 is connected to the switch control circuit 18.
Detects a voltage drop signal from the voltage detection circuit 13, starts a timer for a predetermined time, and when the timer expires, sends a battery open signal 19a to the switch control circuit 18 to turn off the changeover switch 12. It is made to let. The set time of the predetermined time timer corresponds to a time that allows for a sufficient time from the start to the completion of the emergency processing operation of the peripheral circuit 15 including the circuit section.

Next, the storage battery opening control process in the present embodiment will be described with reference to the flowchart shown in FIG.

When the discharge voltage of the storage battery 11 is higher than a predetermined voltage, the switch control circuit 18 keeps the changeover switch 12 in the ON state and controls the power of the storage battery 11 including the circuit section of the portable personal computer and the peripheral circuit 15. Circuit 14
And so on.

In this state, when the program shown in FIG. 2 is started, first, the voltage detection circuit 43 detects and monitors the discharge voltage of the storage battery 11 (step S).
1). It is determined whether or not the discharge voltage of the storage battery 11 is equal to or lower than a predetermined voltage (for example, 7.4 V) (Step S)
2). When the discharge voltage of the storage battery 11 becomes equal to or lower than a predetermined voltage, a voltage drop signal is sent to the timer monitor 19 and the control circuit 14.
To supply.

When detecting the voltage drop signal, the timer monitoring section 19 starts a timer for a predetermined time (step S3), and when detecting the voltage drop signal, the control circuit 14 performs processing operations such as emergency processing and backup processing. Is performed (step S4), and the control circuit 14 determines whether or not the processing operation of step S4 is completed (step S5).

If the processing operation of step S4 is completed, the control circuit 14 outputs the storage battery open signal 14a.
Is supplied to the switch control circuit 18 (step S6).
The switch control circuit 18 turns off the changeover switch 12 in response to the storage battery open signal 14a, thereby cutting off the power supply from the storage battery 11 to the circuit unit and the like (step S7).

In step S5, step S4
If the processing operation has not been completed, it is determined whether or not the predetermined time timer of the timer monitoring unit 19 started in step S3 has expired (step S8). If the timer monitoring unit 19 has not timed out, the process proceeds to step S5 while continuing the processing operation of step S4.

In step S8, the timer monitoring unit 19
If the timer of the predetermined time has expired, it is determined that the control circuit 14 is running out of control, regardless of whether or not the processing operation of step S4 is continuing, and the storage battery release signal is 19a is supplied to the switch control circuit 18 (step S9). The switch control circuit 18 turns off the changeover switch 12 in response to the storage battery open signal 19a, thereby cutting off the power supply from the storage battery 11 to the circuit unit and the like (step S7).

According to the first embodiment, when the discharge voltage of the storage battery 11 becomes equal to or lower than the predetermined voltage, the control circuit 14 performs predetermined emergency processing and backup processing of the peripheral circuit 15 including the circuit section. The operation is started, and when this processing operation is completed, the storage battery open signal 14a is supplied to the switch control circuit 18 to turn off the changeover switch 12, thereby cutting off the power supply from the storage battery 11 to the circuit section and the like. Therefore, regardless of whether the data backup process has been completed as in the conventional case, if the control circuit 14 is normal, the power supply from the storage battery 11 is not forcibly cut off, and the next time During the start-up operation, the state of the backup-processed data can be restored.

According to the first embodiment, when the discharge voltage of the storage battery 11 becomes equal to or less than the predetermined voltage, the timer for the predetermined time is started, and when the timer for the predetermined time is up, the control circuit 14 is activated. It is determined that a runaway is occurring, and the storage battery open signal 19a is supplied to the switch control circuit 18 to turn off the changeover switch 12 regardless of the processing operation of the control circuit 14, thereby turning off the storage battery 11 to the circuit section or the like. Since the power supply is cut off, unnecessary overdischarge of the storage battery 11 can be prevented by forcibly stopping the power supply of the storage battery 11 when the control circuit 14 goes out of control.

(Embodiment 2) Next, a base station of a wireless communication system according to an embodiment of the electronic apparatus of the present invention will be described. FIG. 3 is a block diagram showing a schematic configuration of the wireless channel system shown in the second embodiment.

In FIG. 3, the same components as those in FIG. 1 are denoted by the same reference numerals, and the description of the components will be omitted. Only the points different from FIG. 1 will be described. Are connected via a changeover switch 12 such as a transceiver 20 and a transmission device 21.

The transmission device 21 is connected via a communication line 22 to a communication control center 23 including an exchange and the like.

The radio communication base station 10 notifies the communication control center 23 of an alarm indicating that the discharge voltage of the storage battery 11 has dropped, and further indicates that the communication control center 23 has received the alarm. And an alarm communication unit 141 that receives a response notification from the response unit 231 of the communication control center 23.

In the radio communication base station 10 of the radio circuit system configured as described above, the functions of the circuit elements denoted by the same reference numerals as those in FIG. 1 are the same as those described in FIG. The description of the operation is omitted, and only the parts different from those in FIG. 1 will be described.

That is, the switch control circuit 18 of the wireless communication base station 10 receives the battery open signal 14 a from the control circuit 14 or the battery open signal 19 from the timer monitor 19.
a, the alarm is notified to the communication control center 23 via the alarm communication unit 141, and the changeover switch 1
By turning off No. 2, the power supply from the storage battery 11 was stopped.

Therefore, according to the second embodiment, not only the effects shown in the first embodiment, but also the power failure of the radio communication base station 10 and the built-in storage battery 11 10 can be notified to the communication control center 23 that the battery 10 has been operated and the discharge voltage of the storage battery 11 is lower than or equal to a predetermined voltage. Can be done.

[0079]

According to the electronic device of the present invention configured as described above, when a voltage drop signal notifying that the discharge voltage of the power storage means is equal to or lower than the predetermined voltage is detected, the processing immediately before termination to the peripheral circuit is performed. Since the operation is started and the power supply to the peripheral circuit by the power storage means is stopped after the completion of the processing immediately before the end, the processing immediately before the end is reliably executed while preventing the performance deterioration due to the overdischarge of the power storage means. be able to.

According to the electronic device of the present invention, the timer is started for a predetermined time when the voltage drop signal is detected, regardless of whether or not the process immediately before the end is completed. Since the power supply to the peripheral circuit is stopped, even if the control means goes out of control, it is possible to reliably prevent performance degradation due to unnecessary overdischarge of the power storage means.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration inside a portable personal computer according to a first embodiment of an electronic device of the present invention.

FIG. 2 is a flowchart showing a processing operation of a storage battery opening control process relating to the portable personal computer according to the first embodiment;

FIG. 3 is a block diagram showing a schematic configuration inside a base station of the wireless communication system shown in the second embodiment;

FIG. 4 is a block diagram showing a schematic configuration inside a conventional electronic device.

[Explanation of symbols]

 Reference Signs List 10 base station for wireless communication (base station) 11 storage battery (power storage means) 12 changeover switch (switching means) 13 voltage detection circuit (voltage detection means) 14 control circuit (control means) 15 peripheral circuit 17 storage device (storage means) 18 Switch control circuit (power storage connection means) 19 Timer monitoring unit (timer monitoring means) 22 Communication line 23 Communication control center (communication network)

Claims (16)

[Claims] 1. A power storage means for supplying power to a peripheral circuit, a voltage drop detection means for detecting a discharge voltage of the power storage means, and outputting a voltage drop signal when the detected voltage falls below a predetermined voltage; Upon detecting the decrease signal, the control means starts a processing immediately before the termination to the peripheral circuit, outputs a release control signal after the completion of the processing immediately before the termination, and responds to the release control signal to the peripheral circuit by the power storage means. And a power storage connection unit for stopping power supply of the electronic device. 2. A power storage means for supplying power to a peripheral circuit, a switching means for connecting or disconnecting the power storage means and the peripheral circuit, and a voltage of a discharge voltage of the power storage means is detected, and the detected voltage is a predetermined voltage. A voltage drop detecting means for outputting a voltage drop signal when the following occurs, and a control for starting a processing immediately before termination to peripheral circuits upon detection of the voltage drop signal and outputting an open control signal after completion of the processing immediately before termination. And an electricity storage connection means for controlling a switching means so as to disconnect the electricity storage means and the peripheral circuit in response to the open control signal. 3. A timer monitoring means for starting a timer for a predetermined time in response to a voltage drop signal from said voltage drop detection means, and outputting said open control signal when said timer times out. Item 3. The electronic device according to Item 1 or 2. 4. The electronic device according to claim 1, wherein the predetermined time is a time that allows for a sufficient processing time from the start to the completion of the processing operation immediately before the end. 5. The electronic device according to claim 3, wherein the predetermined time is a time that allows for a sufficient processing time from the start to the completion of the processing operation immediately before the end. 6. The electronic apparatus according to claim 1, wherein the immediately preceding termination processing operation is a processing operation of storing backup data relating to the peripheral circuit in a storage unit. 7. The electronic device according to claim 3, wherein the immediately before termination processing operation is a processing operation of storing backup data relating to the peripheral circuit in a storage unit. 8. The electronic apparatus according to claim 4, wherein the immediately preceding termination processing operation is a processing operation of storing backup data relating to the peripheral circuit in a storage unit. 9. Applied to a base station connected to a communication network of a wireless circuit system via a communication line, wherein the power storage means starts power supply to peripheral circuits when the base station goes out of power. Item 10. The electronic device according to item 1, 2, 5, 7, or 8. 10. The power storage unit is applied to a base station connected to a communication network of a wireless line system via a communication line,
4. The electronic device according to claim 3, wherein power supply to peripheral circuits is started when a power failure occurs in the base station. 11. The power storage unit is applied to a base station connected to a communication network of a wireless line system via a communication line,
The electronic device according to claim 4, wherein power supply to peripheral circuits is started when a power failure occurs in the base station. 12. The power storage unit is applied to a base station connected to a communication network of a wireless line system via a communication line,
7. The electronic device according to claim 6, wherein power supply to peripheral circuits is started when a power failure occurs in the base station. 13. The electronic device according to claim 9, wherein the immediately preceding termination processing operation is an alarm notification operation for notifying the communication network side of a voltage drop of the power storage unit. 14. The electronic device according to claim 10, wherein the immediately before termination processing operation is an alarm notification operation of notifying the communication network side of a voltage drop of the power storage unit. 15. The immediately preceding termination processing operation includes executing an alarm notification operation for notifying the communication network side of a voltage drop of the power storage means, and notifying that the alarm has been responded to by the communication network side. The electronic device according to claim 9, wherein the electronic device performs an operation of receiving a response completion notification. 16. The immediately preceding termination processing operation includes executing an alarm notification operation of notifying the communication network side of a voltage drop of the power storage means, and notifying that the alarm has been responded by the communication network side. The electronic device according to claim 10, 11 or 12, wherein the operation of receiving the response completion notification is performed.