JPH06195158A - Information processor - Google Patents

Abstract

PURPOSE:To prevent the inflow of charging current into a battery pack type AC adapter. CONSTITUTION:It is judged that an object mounted on a mounting part 10 is battery pack 1 or a battery pack type AC adapter 4 based on terminal voltage detected by a voltage detection circuit 13. When the AC adapter 4 is mounted, a switch 15 is opened and the charging current to be supplied from a charging circuit 14 to the mounting part 10 is stopped. Thus, there is no fear that the circuit components of the battery pack type AC adapter 4 are damaged, and the external AC adapter can be connected even when the battery pack type AC adapter is mounted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery-powered portable electronic device such as a laptop personal computer.

[0002]

2. Description of the Related Art In recent years, a so-called battery pack as shown in FIG.
Information processing devices such as laptop personal computers that use 1 as a driving power source have become widespread. This battery pack 1 has a positive electrode 2 and a negative electrode 3, and is attached to the positive electrode receiving terminal and the negative electrode receiving terminal formed on the information processing device, respectively, for example, when mounted on the rear part of the information processing device. It is detachably attached to the part.

In an information processing apparatus in which the battery pack 1 is detachably mounted, when an AC adapter is connected from the outside, driving power is supplied from the AC adapter to the information processing apparatus while charging the battery pack. AC
When the adapter is not connected, drive power is supplied from the battery pack to the information processing device.

In place of the battery pack 1, a battery pack type AC adapter 4 having the same external shape as the battery pack 1 may be mounted as shown in FIG. Like the battery pack 1, this AC adapter 4 has a positive electrode 5 and a negative electrode 6, and further has an outlet 7, and is mounted on the rear mounting portion of the information processing apparatus to which the battery pack 1 is mounted.

[0005]

However, when the external AC adapter is connected when the battery pack type AC adapter 4 is mounted on the information processing device, the battery pack type AC adapter 4 becomes the same as the battery pack 1. Since it has the external shape described above, a charging current may flow from the charging circuit (not shown) in the information processing device to the AC adapter 4, and the circuit components of the AC adapter 4 may be damaged. Therefore, when the AC adapter 4 is mounted on the information processing device, there is a problem that the connection of the external AC adapter must be prohibited, and that the user's attention must be relied upon. .

The present invention has been made in view of the above circumstances, and is a battery pack type AC of the same type as the battery pack.
An object of the present invention is to provide an information processing device that prevents the charging current from flowing into the adapter.

[0007]

In order to achieve the above object, the present invention provides information that a battery pack consisting of a secondary battery or a battery pack type AC adapter having the same shape as the battery pack is mounted on a mounting portion. In the processing device, a voltage detection circuit that detects a terminal voltage of the battery pack or the AC adapter mounted on the mounting portion, and a charging circuit that supplies a charging current to the mounting portion.
And a switch unit for controlling the supply of the charging current supplied from the charging circuit to the mounting unit based on the terminal voltage detected by the voltage detection circuit.

[0008]

Since the present invention is configured as described above, it is determined whether the one mounted in the mounting portion is the battery pack or the battery pack type AC adapter based on the terminal voltage detected by the voltage detection circuit. When the AC adapter is mounted, the switch section stops the charging current supplied from the charging circuit to the mounting section, so that there is no risk of damaging the circuit components of the battery pack type AC adapter. An external AC adapter can be connected even when the type AC adapter is attached.

[0009]

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

FIG. 1 is a diagram showing a schematic configuration of an information processing apparatus according to an embodiment of the present invention.

In FIG. 1, 10 is a battery pack 1.
Alternatively, in the mounting portion to which the battery pack type AC adapter 4 is mounted (Fig. 1 shows an example in which the battery pack 1 is mounted), the mounting portion 10 includes each electrode of the battery pack 1 or the battery pack type AC adapter 4. A positive electrode receiving terminal 11 and a negative electrode receiving terminal 12 which are connected to each other are provided. In addition, the positive electrode receiving terminal 11 and the negative electrode receiving terminal 12
Between, that is, the battery pack attached to the attachment part 10.
1 Or in parallel with the battery pack type AC adapter 4, the resistors R1 and R2 for measuring the terminal voltage of the battery pack 1 or the battery pack type AC adapter 4 are connected, and the voltage divided by the resistors R1 and R2 is the voltage detection circuit 13 Entered in.

The voltage detection circuit 13 detects the voltage value of the input voltage corresponding to the terminal voltage of the battery pack 1 or the battery pack type AC adapter 4, and is mounted on the mounting portion 10 based on the detected voltage value. battery pack
Recognize 1 or AC adapter 4. That is,
Since the terminal voltage of the AC adapter 4 is set higher than the terminal voltage of the battery pack 1, which one is attached is recognized depending on whether the detected voltage is within the voltage range of the battery pack 1. Further, the voltage detection circuit 13 has a function of detecting whether or not the charging of the battery pack 1 by the charging circuit 14 is in a fully charged state based on the detected voltage.

The charging circuit 14 supplies a charging current to the battery pack 1 mounted on the mounting portion 10 via the switch 15 whose opening and closing is controlled by the voltage detecting circuit 13. The charging of the battery pack 1 by the charging circuit 14 is performed when an external AC adapter (not shown) is connected to the information processing device, and when the external AC adapter is not connected, a control (not shown) is performed. The charging current is not supplied from the charging circuit 14 by the control of the circuit, and the charging is not performed.

The switch 15 recognizes that the battery pack type AC adapter 4 is mounted on the mounting portion 10 based on the voltage detected by the voltage detection circuit 13 and when the battery pack 1 is full. When the charging state is detected, the charging circuit is opened and the charging current supplied from the charging circuit 14 is not supplied to the mounting portion 10. When it is recognized that the battery pack 1 is mounted on the mounting portion 10, the switch 15 is closed, and the charging current supplied from the charging circuit 14 via the closed switch 15 is the mounting portion 10. Supplied to battery pack 1 installed in 10.

On the other hand, an internal circuit of the information processing device (not shown)
Drive power is supplied to the battery pack 1 or the AC adapter 4 mounted on the mounting portion 10 via the backflow prevention diode D1.

Next, the operation of the embodiment of the present invention having the above structure will be described with reference to the flow chart shown in FIG.

First, the voltage detection circuit 13 detects the voltage divided by the resistors R1 and R2, and it is checked whether the detected voltage is within the voltage range of the battery pack 1.
If the detected voltage is within the voltage range of the battery pack 1, it is recognized that the battery pack 1 is mounted on the mounting portion 10, and the switch 15 is closed by the voltage detection circuit 13. When the switch 15 is closed, the charging circuit 14
The battery pack 1 is charged by. (Step S1, Step S2).

If the voltage detected by the voltage detector 13 is outside the voltage range of the battery pack 1, the operation proceeds to step S3, and the detected voltage is higher than the voltage of the battery pack 1. Type AC adapter 4
The output voltage value of is checked. When it is determined that the detected voltage is the output voltage value of the battery type AC adapter 4, the operation shifts to step S4, and the voltage detection circuit 13 opens the switch 15. When the switch 15 is opened, the charging current supplied from the charging circuit 14 is prohibited and the current does not flow into the AC adapter 4, so the charging prohibition process is executed. (Step S3, Step S4).

If it is determined in step S3 that the detected voltage is not the output voltage value of the AC adapter 4, it means that the detected voltage is lower than the voltage of the battery pack 1. At this time, the battery pack 1 Some abnormality has occurred in the battery, and abnormality processing such as replacement of the battery pack 1 is performed. (Step S5).

In the above embodiment, the laptop personal computer is applied as the information processing device, but the present invention is not limited to this, and it is needless to say that the present invention can be applied to all devices employing a battery pack type AC adapter.

Further, the present invention is not limited to the above embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

[0022]

As described in detail above, according to the information processing apparatus of the present invention, the one mounted on the mounting portion is the battery pack or the battery pack based on the terminal voltage detected by the voltage detection circuit. Type AC adapter is determined, and when the AC adapter is mounted, the switch section stops the charging current supplied from the charging circuit to the mounting section, thereby damaging the circuit components of the battery pack type AC adapter. There is no fear, and even when the battery pack type AC adapter is attached, an external AC adapter can be connected.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration of an information processing apparatus according to an embodiment of the present invention.

FIG. 2 is a flowchart showing an operation of the information processing apparatus according to the exemplary embodiment of the present invention.

3 is a diagram showing an example of a battery pack, and FIG.
3A is a plan view thereof, and FIG. 3B is a front view thereof.

FIG. 4 is a diagram showing an example of a battery pack type AC adapter, FIG. 3 (a) is a plan view thereof, and FIG. 3 (b) is a front view thereof.

[Explanation of symbols]

 1 ... Battery pack 4 ... Battery pack type AC adapter 10 ... Mounting part 13 ... Voltage detection circuit 14 ... Charging circuit 15 ... Switch (switch part)

Claims (1)

[Claims] 1. An information processing apparatus in which a battery pack including a secondary battery or a battery pack type AC adapter having the same shape as the battery pack is mounted in a mounting portion, and the battery pack or AC mounted in the mounting portion. A voltage detection circuit that detects the terminal voltage of the adapter, a charging circuit that supplies a charging current to the mounting portion,
An information processing apparatus comprising: a switch unit that controls the supply of a charging current supplied from the charging circuit to the mounting unit based on the terminal voltage detected by the voltage detection circuit.