JP2604550Y2 - Charging device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charging device having at least two parts, a main mounting part and a sub mounting part, into which a battery to be charged can be mounted, and sequentially charging the batteries to be mounted in each of the mounting parts. This is suitable for use in a charging device that charges a battery to be charged attached to a portable device such as a mobile phone and a spare battery to be charged.

[0002]

2. Description of the Related Art In portable devices such as portable telephones and laptop personal computers, secondary batteries such as nickel cadmium batteries and nickel hydrogen batteries are used as power sources. As a secondary battery charging device used in such a portable device, for example, as described in JP-A-4-351431, a secondary battery attached to the portable device and a spare secondary battery are described. A charging device including two mounting portions each capable of mounting a secondary battery is preferable.

[0003]

[Problems to be Solved by the Invention] By the way, a secondary battery attached to a portable device (for example, a portable telephone) is
In order to keep the portable device in a usable state at all times, it is preferable that the portable device is attached to the charging device and quickly charged to a full state. To this end, the charging power supply unit may have a large capacity. However, this requires not only an increase in the size of the device, but also a great deal of attention to an overcharge prevention circuit and the like for the battery to be charged. Invite up.

[0004] In view of the above, the present invention is intended to enable quick and easy charging of a battery to be charged.

[0005]

SUMMARY OF THE INVENTION According to the present invention, at least two of a main mounting portion and a sub mounting portion to which a battery to be charged can be mounted.
A charging device that sequentially charges the battery to be charged mounted on each of the mounting portions, a charging power source for charging the battery to be charged mounted on each of the mounting portions, and a charging power source and each of the mounting portions. Switch means disposed on each of the charging paths between the first and second charging paths, a capacity detecting section for detecting a remaining capacity of each battery to be charged mounted on the main mounting section and the sub-mounting section, and a capacity detecting section for detecting the remaining capacity. And a comparison unit that compares the remaining capacity obtained by the control unit. As a result of the comparison, the remaining capacity of the battery to be charged mounted on the sub-mounting unit is larger than the remaining capacity of the battery to be charged mounted on the main mounting unit. when it is, by the rechargeable battery which is mounted in front Symbol sub mount unit, the object to be charged
Charging the battery to be charged mounted on the main mounting portion until the voltage becomes equal to the battery voltage of the battery , and then charging the main mounted portion
Switch switching means for switching the switch means so as to charge the battery to be charged mounted on the unit with the charging power supply .

[0006]

According to the present invention, the remaining capacity of each battery to be charged mounted on the main mounting portion and the sub mounting portion is detected. Then, when the remaining capacity of the battery to be charged mounted on the sub-mounting portion is larger than that of the battery to be charged mounted on the main mounting portion, the battery is mounted on the sub-mounting portion prior to charging by the charging power supply. The charged battery mounted on the main mounting portion is charged by the charged battery.

[0007]

FIG. 1 is a block circuit diagram showing an embodiment of the present invention. 1A is a main mounting portion for mounting a charged battery 2A mounted on an electronic device (shown in the form of a load resistor R in the figure), and 1B is a charged battery used as a spare battery for the charged battery 2A. The sub-mounting section 2 for mounting the battery 2B is the battery 2 to be charged mounted on each of the mounting sections 1A and 1B.
A and 2B, charging power supply units for charging A and 2B, first and second switches disposed on each of charging paths between the charging power supply unit 3 and each of the mounting units 1A and 1B, and D represents a charging power supply unit. 3 is a backflow prevention diode disposed between the first switch 3 and the first and second switches 4A and 4B. Reference numerals 5A and 5B denote first and second capacity detection units for detecting the remaining capacities of the batteries 2A and 2B mounted on the main mounting unit 1A and the sub mounting unit 1B, respectively. Rechargeable batteries 2A, 2B
Are the same batteries, the remaining capacity is detected by measuring their battery voltages. 6 is the first and second
This is a comparison unit that compares the remaining capacity detected by the capacity detection units 5A and 5B.

Further, a control unit 7 controls the opening and closing operations of the first and second switches 4A and 4B and the operation of the charging power supply unit 3 based on the comparison result of the comparison unit 6. As will be described in detail below, the control unit 7 performs control when the battery voltage of the battery 2B mounted on the sub-mounting unit 1B is higher than the battery voltage of the battery 2A mounted on the main mounting unit 1A. ,
First, the first and second switches 4A and 4B are both turned on to charge the charged battery 2A mounted on the main mounting portion 1A with the charged battery 2B mounted on the sub-mounting portion 1B. The battery 3A to be charged is charged by the unit 3 to make it fully charged. It is preferable that the control unit 7 is configured using a microcomputer together with the comparison unit 6.

FIG. 2 is a flowchart showing the operation of the above embodiment.

First, in step S1, the battery voltages V1 and V2 of the charged battery 2A mounted on the main mounting portion 1A and the charged battery 2B mounted on the sub mounting portion 1B are set.
Are detected by the first capacitance detection unit 5A and the second capacitance detection unit 5B, and are compared by the comparison unit 6. If the battery voltage V2 of the battery 2B is higher than the battery voltage V1 of the battery 2A, the process proceeds to step S2.

In step S2, the first switch 4A
Is turned on, and subsequently, in step S3, the second
The switch 4B is also turned on. Therefore, the sub-mounting unit 1A is attached to the battery 2A to be charged mounted on the main mounting
A large current is supplied from the charged battery 1B attached to B,
Charges quickly.

Subsequently, in step S4, it is determined whether or not the battery voltages of the batteries 2A and 2B have become equal. When it is determined that they are equal, the second switch 4B is turned off in step S5, and the battery 2A to be charged is charged by the charging power supply unit 3.

Subsequently, in step S7, the battery 2A to be charged
It is determined whether or not the battery is fully charged. When the battery is fully charged, the first switch 4A is turned off in step S8, and the second switch 4B is turned on in step S9. Of the battery 2B to be charged is started. Then, in step S10, when it is detected that the charged battery 2B is fully charged, the process proceeds to step S11.
The switch 4B is turned off, and all charging operations are completed.

If it is determined in step S1 that the battery voltage V1 of the battery 2A to be charged is higher than the battery voltage V2 of the battery 2B, the first switch 4A is turned on in step S6. , Charging power supply 3
Immediately starts charging of the battery 2A, and then proceeds to the operations of steps S7 to S11 described above.

[0015]

According to the present invention, the remaining capacity of each battery to be charged mounted on the main mounting portion and the sub mounting portion is detected, and the remaining capacity of the charged battery mounted on the sub mounting portion is detected. when the is larger than that of the rechargeable battery mounted in the main mounting portion, prior to charging by the charging power supply, by the rechargeable battery mounted on the sub-mount unit, those
To equal to the battery voltage of該被rechargeable battery to charge the rechargeable battery mounted in the main mounting portion, then the charging electric
Since the battery is configured to be fully charged using the power source, the battery to be charged mounted on the main mounting portion can be quickly and easily charged safely.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the embodiment of the present invention;

[Explanation of symbols]

 1A Main mounting section 1B Sub mounting section 2A, 2B Battery to be charged 3 Charging power supply section 4A First switch 4B Second switch 5A First capacity detection section 5B Second capacity detection section 6 Comparison section 7 Control section

Claims (1)

(57) [Scope of request for utility model registration] 1. A charging device having at least two of a main mounting portion and a sub mounting portion on which a battery to be charged can be mounted, and sequentially charging the battery to be charged mounted on each of the mounting portions. A charging power source for charging the battery to be charged mounted on the power source, switch means arranged on each of charging paths between the charging power source and each mounting portion, and mounted on the main mounting portion and the sub mounting portion. A capacity detection unit that detects the remaining capacity of each battery to be charged, a comparison unit that compares the remaining capacity detected by the capacity detection unit, and a result of the comparison performed by the comparison unit, when the remaining capacity of the rechargeable battery is greater than the remaining capacity of the rechargeable battery mounted in the main mounting portion, by the rechargeable battery which is mounted in front Symbol sub mounting portion, it becomes equal to the battery voltage of the object to be charged batteries
Until the charged battery mounted on the main mounting portion is charged, and thereafter, the charged battery mounted on the main mounting portion.
And a switch switching means for switching the switch means so as to be charged by the charging power supply .