JPH10201116A - Changing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to change a secondary battery built in a portable apparatus with good efficiency even in a state that a commercial power supply is not supplied. SOLUTION: When it is detected that the terminal of a portable apparatus is brought into contact with a charging terminal 5, a main control part 8 controls a data transmission-reception part 6 so as to communicate with the portable apparatus. Data which expresses the consumption energy of a secondary battery built in the portable apparatus is received. A charging amount required for completely charging the secondary battery built in the portable apparatus is found on the basis of the consumption energy. A current amount Ia and the charging time Ta which correspond to the charging amount are computed. A second charging control part 4 is controlled. Eelectric power in the current amount Ia is taken out from a secondary battery 3 so as to be supplied to the charging terminal 5. Thereby, a charging operation to the secondary battery built in the portable apparatus is started. Then, when the computed charging time Ta elapses after the start of a charging operation by the secondary battery 3, the main control part 8 controls the second charging control part 4 so as to prohibit electric power from being taken out from the secondary battery 3, and the charging operation to the secondary battery built in the portable apparatus is finished.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charging device for charging a secondary battery built in a portable device.

[0002]

2. Description of the Related Art Conventionally, a portable device driven by a built-in secondary battery, such as a cordless telephone handset, is usually provided with a dedicated charging device separately, and the portable device is connected to the charging device. The built-in secondary battery was being charged. The charging device for charging the secondary battery built in the portable device as described above receives supply of commercial power from the outside, and converts the supplied commercial power into a voltage value and a current amount suitable for the portable device. To mobile devices.

[0003]

However, in the above-described conventional charging apparatus, since the commercial power is converted into a voltage value and a current amount suitable for the portable device and supplied, the state where the commercial power is not supplied is provided. The secondary battery built in the portable device cannot be charged, and therefore, the portable device cannot be supplied with commercial power due to a power outage or the like. There is a problem that the secondary battery cannot be charged.

[0004] It is an object of the present invention to provide a charging device that can efficiently charge a secondary battery built in a portable device even when commercial power is not supplied.

[0005]

According to one aspect of the present invention, there is provided a charging apparatus for charging a rechargeable battery built in a portable device, wherein the power is stored by an external power supply. Means, supply means for supplying the electric power stored in the power storage means to a secondary battery built in the portable device, and controlling the supply means to store the electric power stored in the power storage means for a certain period of time in the portable device. And control means for controlling supply to a built-in secondary battery.

According to a second aspect of the present invention, there is provided a detecting means for detecting whether or not power is being supplied from the outside, and the control means supplies an external power based on a detection result by the detecting means. When it is determined that the power is stored, the power supply means is controlled to constantly supply the power stored in the power storage means to a secondary battery built in the portable device.

According to a third aspect of the present invention, there is provided a calculating means for calculating an energy consumption of a secondary battery built in the portable device and calculating a time required for charging, and the control means calculates the energy consumption by the calculating means. During this time, the electric power stored in the power storage means is controlled to be supplied to a secondary battery built in the portable device.

Therefore, according to the first aspect of the present invention, when the portable device is connected to the device main body in a state where power is stored in the power storage means by external power supply,
The control means controls the supply means to supply the power stored in the power storage means to the secondary battery built in the mobile device for a certain period of time, so that the power storage means is built in the mobile device without wasteful energy consumption. The secondary battery can be charged.

According to the second aspect of the present invention, when the portable device is connected to the apparatus main body in a state where the detection means detects that no external power supply is received, the control means sets the supply means. While the power stored in the power storage means is supplied to the secondary battery incorporated in the portable device for a certain period of time, while the detection means detects that the external power supply is being received, When the portable device is connected to the portable device, the control unit controls the supply unit to constantly supply the power stored in the power storage unit to the secondary battery built in the mobile device, thereby wasting the power storage of the power storage unit. It is possible to charge the secondary battery built in the portable device without reducing the amount.

According to the third aspect of the present invention, when the portable device is connected to the apparatus main body in a state where power is stored in the power storage device by the power supply from the outside, the portable device connected to the calculating device is connected to the portable device. The time required for charging is calculated by calculating the energy consumption of the built-in secondary battery, and the control means controls the supply means, and during the calculated time, the power stored in the power storage means is transferred to the portable device. By supplying the battery to the built-in secondary battery, the built-in secondary battery can be completely charged without wasteful energy consumption in the power storage means.

[0011]

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

FIG. 1 is a schematic functional block diagram showing an electric configuration of a charging apparatus according to an embodiment of the present invention, FIG. 2 is an explanatory view showing an outline of a system using the charging apparatus, and FIG. 6 is a flowchart illustrating operation control during charging in the device.

In FIG. 1, reference numeral 1 denotes a DC jack for receiving a supply of external DC power, 2 denotes a first charging control unit for charging a secondary battery 3 based on the DC power supplied by the DC jack 1, Reference numeral 3 denotes a secondary battery that is charged based on the control of the first charging control unit 2, 4 denotes a second charging control unit that adjusts the amount of current supplied to the charging terminal 5, and 5 denotes a terminal provided in the portable device. Is a charging terminal that supplies power to a secondary battery built in the portable device by contact with the battery.

Reference numeral 6 denotes a data transmission / reception unit which transmits data to the portable device via the charging terminal 5 and reads data received via the charging terminal 5, and 7 denotes a state of the apparatus main body and a charge amount of the secondary battery 3. And a display unit 8 for displaying a charge in the first charge control unit 2 and the second charge control unit 4 based on control signals from the first charge control unit 2, the second charge control unit 4, and the data transmission / reception unit 6. The main control unit performs control, data communication control in the data transmission / reception unit 6, and display control in the display unit 7.

As shown in FIG. 2, in the charging device A configured as described above, the connector of the AC adapter C that converts the AC power from the commercial power source B into the DC power and supplies the DC power is connected to the charging device A main body. And a portable device D containing a secondary battery is detachably provided.

Hereinafter, the charging operation of the charging device configured as described above will be described with reference to the flowchart shown in FIG.

A is connected to DC jack 1 of charging device A.
When the connector of the C adapter C is not inserted and the main control unit 8 recognizes that there is no external supply of DC power based on the control signal from the first charging control unit 2 (step F1).
In step F2, the main controller 8 determines that the terminal of the portable device has contacted the charging terminal 5 based on the inter-terminal power of the charging terminal 5 and the control signal from the data transmitting / receiving unit 6 (step F2).
The main controller 8 controls the data transmitter / receiver 6 to perform communication with the portable device (step F3), requests transmission of data representing the energy consumption of the secondary battery built in the portable device, and transmits the data. The data representing the consumed energy transmitted from the portable device in response to the request is received.

Then, the main control unit 8 obtains a charge amount necessary for completely charging the rechargeable battery built in the portable device based on the consumed energy received by the data transmission / reception unit 6, and corresponds to the charge amount. Current amount Ia and charging time Ta
(Step F4), and by controlling the second charge control unit 4 to take out the electric power of the current amount Ia from the secondary battery 3 and supply it to the charging terminal 5, the secondary battery built in the portable device is obtained. Charging (external charging) is started (step F5). When the calculated charging time Ta has elapsed since the start of charging by the secondary battery 3 (step F
7), the main control unit 8 controls the second charge control unit 4 to prohibit the extraction of electric power from the secondary battery 3, thereby terminating the charging of the secondary battery built in the portable device (external charging). (Step F8).

Before the charging time Ta calculated from the start of charging by the secondary battery 3 elapses, the charging terminal 5 is controlled based on the inter-terminal voltage of the charging terminal 5 and a control signal from the data transmitting / receiving unit 6. When it is detected that the contact of the terminal of the mobile device with the terminal has been released (step F6), the main control unit 8 also controls the second charge control unit 4 to take out the power from the secondary battery 3. By prohibiting, the charging operation (external charging) via the charging terminal 5 is terminated (step F).
8).

On the other hand, the connector of the AC adapter C is inserted into the DC jack 1 constituting the charging device A, the external supply of the DC power is detected by the first charging control unit 2, and the main control unit 8 operates the first charging control unit. DC based on the control signal from
When it is recognized that there is an external power supply (step F1), the main control unit 8 sends the portable terminal of the portable device to the charging terminal 5 based on the voltage between the terminals of the charging terminal 5 and the control signal from the data transmitting / receiving unit 6. Determine whether the terminals are in contact (step F
9).

At this time, when it is determined that the terminal of the portable device is in contact with the charging terminal 5 (step F)
In 9), the main control unit 8 controls the first charge control unit 2 to supply electric power of the current amount Ib to the subsequent stage, thereby charging the secondary battery 4 (internal charging) (step F10). By controlling the second charging control unit 4 to supply the electric power of the current amount Ia to the charging terminal 5, the charging of the secondary battery built in the portable device (external charging) is started (step F1).
1). At this time, by making the current amount Ib larger than the current amount Ia, it is possible to charge the secondary battery 4 while charging the secondary battery built in the portable device.

On the other hand, when it is determined that there is an external supply of DC power (step F1) and it is determined that the terminal of the portable device is not in contact with the charging terminal 5 (step F9), the main control is performed. The unit 8 controls the first charging control unit 2 to perform only charging (internal charging) of the secondary battery 4 (Step F12).

Therefore, according to the above operation control, the secondary battery built in the portable device can be completely charged efficiently even when the commercial power is not supplied.

In the above embodiment, the communication with the portable device is performed and the amount of current and the charging time are calculated and the charging is performed only when the commercial power is not supplied. However, the present invention is not limited to this. Instead, even when commercial power is supplied, the communication with the portable device may be performed to calculate the amount of current and the charging time to perform charging, or the current may be supplied without providing such a communication function. The amount and the charging time may be appropriately set in advance.

[0025]

As described above, according to the first aspect of the present invention, the secondary battery built in the portable device can be charged by the electric power stored in the apparatus main body. The secondary battery built into the portable device can be charged when the power cannot be supplied or when there is no commercial power supply nearby, and the secondary battery built into the portable device can be charged by the power stored in the main body of the device. By setting the battery charging time to a fixed time, it is possible to prevent the supply of power to a fully charged secondary battery for a long time, so that the power is supplied to a fully charged secondary battery. It is possible to suppress wasteful energy consumption due to heat radiation caused by the supply, and as a result, it is possible to efficiently charge the secondary battery with the power stored in the apparatus main body.

According to the second aspect of the invention, only when commercial power is supplied, power is constantly supplied to the secondary battery built in the portable device connected to the apparatus main body, thereby enabling the apparatus main body to be supplied. The secondary battery built in the portable device can be completely charged without wasting the power stored in the portable device.

According to the third aspect of the present invention, the time required for charging is calculated from the energy consumption of the secondary battery built in the portable device connected to the main body of the device, and the device is charged for the calculated time. By supplying the power stored in the main body to the secondary battery built in the mobile device, the secondary battery built in the mobile device can be completely charged,
Since power can be prevented from being supplied to the fully charged secondary battery, unnecessary energy consumption due to heat radiation caused by supplying power to the fully charged secondary battery can be suppressed. As a result, the secondary battery can be more efficiently charged with the electric power stored in the apparatus main body.

[Brief description of the drawings]

FIG. 1 is a schematic functional block diagram showing an electrical configuration of a charging device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an outline of a system using the charging device.

FIG. 3 is a flowchart showing operation control during charging in the charging device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 DC jack 2 1st charge control part 3 Secondary battery 4 2nd charge control part 5 Charging terminal 6 Data transmission / reception part 7 Display part 8 Main control part

Claims (3)

[Claims] 1. A charging device for charging a secondary battery built in a portable device, comprising: a power storage unit stored by an external power supply; and a secondary battery built in the portable device. Supply means for supplying the battery; and control means for controlling the supply means so as to supply the power stored in the power storage means to the secondary battery built in the portable device only for a certain period of time. Characteristic charging device. 2. A detecting means for detecting whether or not an external power supply is received, wherein the control means determines when external power is supplied based on a detection result by the detecting means. 2. The charging device according to claim 1, wherein the charging device controls the supply device so as to constantly supply the power stored in the power storage device to a secondary battery built in the portable device. 3. A calculating means for determining an energy consumption of a secondary battery built in the portable device and calculating a time required for charging, wherein the control means controls a time period calculated by the calculating means. The charging device according to claim 1, wherein control is performed to supply power stored in the power storage unit to a secondary battery built in the portable device.