JPS63103628A - Charging system - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for charging a secondary battery in an electronic circuit unit in which power is supplied from a secondary battery as a power source to an electronic circuit as a load. .

BACKGROUND OF THE INVENTION In recent years, there have been many cases in which electronic devices have a master unit and a slave unit, and the output of the master unit is inputted to an external electronic circuit unit as a slave unit for further processing. In that case, it is necessary to provide a separate power supply within the external electronic circuit unit.

In this case, a secondary battery is used as a power source in the electronic circuit unit, and power is supplied from outside to charge the electronic circuit unit. An example of a conventional charging method will be described below with reference to the drawings.

FIG. 3 shows a circuit diagram of a conventional charging method. e
is an electronic circuit unit, 6 is a secondary battery in the electronic circuit unit e, 4 is an electronic circuit such as an amplifier, 3 is a coupling capacitor, and S is a switch.

An input signal is applied between terminals A and G, enters an electronic circuit 4 via a coupling capacitor 3, and is output from between terminals B and G. The electronic circuit 4 as a load is supplied with power from the secondary battery 6 through the switch S, and when the switch S is set to the 2" side, the secondary battery 5 is depleted and needs to be charged. A terminal C was provided, and the battery was configured to be charged using the terminal C as an anode and the terminal G as a cathode.

Problems to be Solved by the Invention However, the above configuration has the problem that a charging terminal must be provided separately, making it impossible to downsize the electronic circuit unit.

In view of the above-mentioned problems, the present invention provides a charging method for charging an internal secondary battery without having a separate charging terminal.

Means for Solving the Problems In order to solve the above problems, the charging method of the present invention supplies power to the input terminal or output terminal of the electronic circuit unit to charge the secondary battery in the electronic circuit unit. It has the following configuration.

Function The present invention, with the above-described configuration, makes it possible to charge the internal secondary battery without providing a separate charging terminal.

EXAMPLE Hereinafter, a charging method according to an example of the present invention will be described with reference to the drawings.

FIG. 1 shows a method of charging from an input terminal of an electronic circuit unit using a charging method in a first embodiment of the present invention. In FIG. 1, e is an electronic circuit unit,
5 is a secondary battery, 4 is an electronic circuit such as an amplifier, 3 is a coupling capacitor, and S is a switch. Electronic equipment as a parent device (
(not shown) is the input terminal A of the electronic circuit unit 6.
, G, and inputs only the AC signal through the coupling capacitor 3 to an electronic circuit 4 such as an amplifier. The output of the electronic circuit 4 is applied between terminals B and G. The power supply for electronic circuit 4 is 2
It is supplied from the secondary battery 6 through the 2nd terminal side of the changeover switch S. Normal operation can now be achieved by supplying power from the secondary battery 6.

Next, when charging the secondary battery 6, switch S is switched to the 1-terminal side, and when external DC power is applied between terminals A and G so that terminals A and G become the anode and cathode, respectively, the diode D The secondary battery 5 is charged throughout. At this time, diode D is not necessarily required. When AC power is applied between terminals A and G, it is rectified by diode D and rechargeable battery 5 is charged. In this case, coupling capacitor 3
must have a capacitance value that provides a sufficiently high impedance to the AC frequency applied between terminals A and G.

. As described above, according to this embodiment, when the power switch S in the electronic circuit unit 6 is turned off, the electronic circuit unit
By applying power between the input terminals A and G of the electronic circuit unit e, there is no need to provide a separate charging terminal.
It is possible to charge the secondary battery 6 inside.

FIG. 2 shows a method of charging from the output terminal of a charging method unit showing a second embodiment of the present invention. Second
In the figures, numbers and symbols are similar in structure to those in FIG. The difference from the configuration shown in FIG. 1 is that a coupling capacitor 3 is inserted between the electronic circuit 4 and the output terminal B, and a diode D is connected to the output terminal B.

It is connected to the secondary battery 6 through one terminal side of the switch S.

The operation of the charging method configured as described above will be described below. The signal system is the same as in Figure 1, so it will be omitted. When power is supplied between the output terminals B and G of the electronic circuit unit 6, energy is supplied to the secondary battery 6 through the diode D and the one terminal side of the switch S, and the secondary battery 6 is charged. In this case as well, the capacitance value of the coupling capacitor 3 is selected as follows:
It is necessary to have a sufficiently high impedance for the AC frequency applied to G. Diode p is at terminal B.

This is not necessarily necessary if a DC power source is applied between 6 and 6. Diode D is provided for the purpose of preventing backflow and rectifying when charging with alternating current.

Effects of the Invention As described above, the present invention has the advantage of turning off the power switch and
When the power supply from the battery is cut off and the electronic circuit unit is not operated, use the OFF terminal of the power switch to supply power from the outside to the input terminal or output terminal of the unit to charge the secondary battery inside the unit. Moreover, since there is no need to provide a separate charging terminal, the unit can be made smaller.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of a charging method according to a first embodiment of the present invention, FIG. 2 is a circuit diagram of a charging method according to a second embodiment of the present invention, and FIG. 3 is a circuit diagram of a conventional charging method. be. S...Switch, 3...Capacitor,
4...Electronic circuit, 6...Secondary battery, 6
...Electronic circuit unit, A, B, C, G...
...Terminal. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 3
Figure ((j7 ζ Kengoq Ku?

Claims (1)

[Claims] A charging method characterized by applying power to a corresponding input terminal or output terminal of an electronic circuit unit connected to a signal output terminal of an electronic device to charge a secondary battery in the electronic circuit unit.