JPH079049U - Charger - Google Patents

Abstract

(57) [Abstract] [Purpose] The present invention aims to quickly and easily and safely charge a battery to be charged mounted in a main mounting portion. [Structure] The remaining capacities of the charged batteries 2A and 2B mounted on the main mounting portion 1A and the sub mounting portion 1B are detected. Then, the rechargeable battery 2 mounted on the sub mounting portion 1B
When the remaining capacity of B is larger than that of the battery 1A to be charged mounted on the main mounting portion 1A, the main battery 2B mounted on the sub mounting portion 1B is used to charge the main battery 2B before charging by the charging power supply unit 3. The charged battery 2A mounted on the mounting portion 1A is charged.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a charging device, which has at least two main mounting parts and sub-mounting parts to which rechargeable batteries can be mounted, and sequentially charges the rechargeable batteries mounted in the respective mounting parts, and to a mobile phone. It is suitable for use in a charging device that charges a battery to be charged attached to a portable device such as the above and a backup battery to be charged.

[0002]

[Prior art]

 In mobile devices such as mobile phones and laptop computers, secondary batteries such as nickel-cadmium batteries and nickel-hydrogen batteries are used as the power source. As a charging device for a secondary battery used in such a portable device, for example, as described in JP-A-4-351431, a secondary battery in a state of being attached to a portable device and a secondary battery A charging device equipped with two mounting parts to which a secondary battery can be mounted is suitable.

[0003]

[Problems to be solved by the device]

 By the way, a secondary battery attached to a mobile device (for example, a mobile phone) is quickly attached to a charging device and fully charged in order to keep the mobile device ready for use. Is preferred. For that purpose, the charging power supply unit should have a large capacity, but if this is done, not only will the device become larger, but also a great deal of attention will be paid to the overcharge prevention circuit for the battery to be charged, which will reduce the cost. Invite up.

The present invention has been made in view of the above circumstances, and is intended to enable quick and easy charging of a battery to be charged.

[0005]

[Means for Solving the Problems]

 The present invention relates to a charging device that has at least two main mounting portions and sub-mounting portions to which charged batteries can be mounted, and sequentially charges the charged batteries mounted in each of the mounting parts. Charging power source for charging the battery to be charged mounted on the main unit, switch means arranged on each charging path between the charging power source and each mounting unit, and the main mounting unit and the sub mounting unit. The capacity detection unit that detects the remaining capacity of each charged battery that has been installed, the comparison unit that compares the remaining capacity detected by this capacity detection unit, and the result of the comparison by this comparison unit When the remaining capacity of the charged battery mounted is larger than the remaining capacity of the charged battery mounted in the main mounting part, the charged battery mounted in the sub mounting part is charged before charging by the charging power source. It is mounted on the main mounting part by a battery. Characterized by comprising a switch switching means for switching said switch means to charge the rechargeable battery was.

[0006]

[Action]

 According to the present invention, the remaining capacities of the charged batteries mounted in the main mounting part and the sub mounting part are detected. When the remaining capacity of the charged battery mounted in the sub mounting portion is larger than that of the charged battery mounted in the main mounting portion, it is mounted in the sub mounting portion prior to charging by the charging power source. The charged battery mounted in the main mounting portion is charged by the charged battery.

[0007]

【Example】

 FIG. 1 is a block circuit diagram showing an embodiment of the present invention. 1A is a main mounting portion for mounting a rechargeable battery 2A attached to an electronic device (shown as a load resistance R in the figure), and 1B is a rechargeable battery used as a spare battery for the rechargeable battery 2A. Charging battery 2B sub-mounting part 3, 3 is a charging power source part 4A, 4B for charging the to-be-charged batteries 2A, 2B mounted in each mounting part 1A, 1B is this charging power source part 3 and each mounting part 1A 1B is a first and a second switch disposed on each charging path, and D is a diode for preventing backflow disposed between the charging power source unit 3 and the first and second switches 4A and 4B. Is. Also, 5A and 5B are first and second capacity detecting sections for detecting the remaining capacities of the charged batteries 2A and 2B mounted in the main mounting section 1A and the sub mounting section 1B, respectively. Since the rechargeable batteries 2A and 2B are the same battery, the remaining capacity is detected by measuring their battery voltages. Reference numeral 6 is a comparison unit that compares the remaining capacities detected by the first and second capacity detection units 5A and 5B.

Further, 7 is a control unit that controls the opening / closing operation of the first and second switches 4 A and 4 B 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 controls when the battery voltage of the charged battery 2B mounted in the sub mounting unit 1B is higher than the battery voltage of the charged battery 2A mounted in the main mounting unit 1A. , First, both the first and second switches 4A, 4B are turned on, and the rechargeable battery 2A mounted on the main mounting portion 1A is charged by the rechargeable battery 2B mounted on the sub mounting portion 1B. The charging power source unit 3 charges the battery 2A to be charged to make it fully charged. The control unit 7 is preferably configured by 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 determined by the first capacity detecting portion 5A and It is detected by the second capacitance detection unit 5B and compared by the comparison unit 6. If the battery voltage V2 of the battery 2B to be charged is higher than the battery voltage V1 of the battery 2A to be charged, the process proceeds to step S2.

In step S2, the first switch 4A is turned on, and subsequently, in step S3, the second switch 4B is also turned on. Therefore, the charged battery 2A mounted on the main mounting portion 1A is supplied with a large current from the charged battery 1B mounted on the sub mounting portion 1B, and is rapidly charged.

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

Subsequently, in step S7, it is determined whether or not the battery 2A to be charged is fully charged, and when the battery 2A is fully charged, the first switch 4A is turned off in step S8 and the first switch 4A is turned on in step S9. The 2 switch 4B is turned on, and the charging power supply unit 3 starts charging the battery 2B to be charged. Then, when full charge of the battery 2B to be charged is detected in step S10, the second switch 4B is turned off in step S11, and all charging operations are completed.

When 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 to be charged, the first switch 4A is turned on in step S6. Then, the charging of the battery 2A to be charged by the charging power supply unit 3 is immediately started, and thereafter, the operation proceeds to the above-described steps S7 to S11.

[0015]

[Effect of device]

 According to the present invention, the remaining capacity of each charged battery mounted on the main mounting part and the sub mounting part is detected, and the remaining capacity of the charged battery mounted on the sub mounting part is detected. If it is larger than that of the battery to be charged installed in the main battery, the battery to be charged in the main mounting part should be charged by the battery in the sub mounting part before charging by the charging power source. With this configuration, the battery to be charged mounted in the main mounting part can be quickly and easily and safely charged.

[Brief description of drawings]

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

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

[Explanation of symbols]

 1A Main mounting part 1B Sub mounting part 2A, 2B Charged battery 3 Charging power supply part 4A 1st switch 4B 2nd switch 5A 1st capacity detection part 5B 2nd capacity detection part 6 Comparison part 7 Control part

Claims (1)

[Scope of utility model registration request] 1. A charging device having at least two main mounting parts and sub-mounting parts to which a battery to be charged can be mounted, for sequentially charging the battery to be charged mounted in each of the mounting parts, wherein each mounting part A charging power source for charging the battery to be charged mounted on the battery, switch means arranged on each charging path 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 this capacity detection unit, and the result of the comparison by this comparison unit is that the sub-mounting unit is installed. When the remaining capacity of the rechargeable battery is larger than the remaining capacity of the charged battery mounted in the main mounting portion, before charging by the charging power source,
A charging device, comprising: a switch switching unit that switches the switch unit so that the battery to be charged mounted on the main mounting unit is charged by the battery to be charged mounted on the sub mounting unit.