JPH09130456A - Charging system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform a quick charge while miniaturizing a charger. SOLUTION: This system is the charging system in which a rapid constant current power source 13 supplies power to perform a quick charge for a battery 31 when a portable telephone set 2 is not in a speech state, a control part 22 outputs a speech time signal to a control part 15 when the portable telephone set 2 becomes the speech state, the control part 15 stops the output of a rapid constant current power source 12 and prevents excess current from flowing in a charger 1, heat generation is suppressed, the charger is miniaturized and a rapid charge is performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charging system for a mobile phone, and more particularly to a charging system capable of downsizing a charger, excellent in portability and capable of quick charging.

[0002]

2. Description of the Related Art Usually, a mobile phone uses a removable battery for charging, and it is possible to charge the whole mobile phone by connecting it to a charger while it is attached to the mobile phone. ing. At this time, the charger supplies power to the main body of the mobile phone and at the same time supplies power to the battery for charging.

The portable telephone main body requires different amounts of power when it is not in a call (standby) and when it is in a call. It is usually much higher than the power.

Further, in order to shorten the charging time, a so-called rapid charging method has been conventionally known in which a voltage higher than that of normal charging is applied to the battery. In such rapid charging, the charging is completed. In addition to the need to control the voltage applied immediately before, the temperature inside the storage compartment where the battery is stored is prevented so that accidents such as battery rupture due to an increase in the battery internal pressure and the battery internal pressure do not occur. Must be monitored.

A conventional charging system will be described with reference to FIG. FIG. 2 is a configuration block diagram of a conventional charging system. The conventional charging system, as shown in FIG.
It is composed of a charger 1 ', a mobile phone 2', and a battery unit 3.

The charger 1'includes a main body power source 11,
Trickle power supply 13 ', voltage detection unit 14, and control unit 1
The mobile phone 2'is mainly composed of a switch 21 and a control unit 22 ', and the battery unit 3 is composed of a battery 31 and a thermistor 32. Originally, the mobile phone 2 ′ is provided with a structure necessary for a call such as a wireless unit, but in FIG. 2, only a part related to the charging system is shown for simplification of description. Shows.

The respective parts will be specifically described below. The charger 1'supplies power to the mobile phone 2'and the battery 31 '.
Is to charge. Specifically, the power supply 11 for the main body
Is for supplying power to the mobile phone 2'through the connector A of FIG.

The trickle power supply 13 'is for trickle charging the battery 31 via the connector B of FIG. 2, and is ON / OFF controlled by the controller 15'. The trickle charge is to always keep the battery 31 in a charged state, and the trickle power supply 13 'constantly flows a current slightly larger than the self-discharge current of the battery 31 for trickle charge. It is a power source to keep.

The voltage detector 14 detects the voltage state from the current at the contact X and outputs it to the controller 15 'as a voltage state signal. The control unit 15 'includes the voltage detection unit 1
The state of charge of the battery is checked by monitoring the voltage state signal input from No. 4, and the trickle power source 13 'is controlled. That is, when approaching the state where charging is completed, the output of the trickle power supply 13 'is lowered, and when the battery 31 self-discharges after a lapse of time from the state where charging is completed, The output of the power supply 13 'is increased.

Specifically, as the battery 31 approaches the state where it is fully charged, the voltage at which the battery 31 is self-discharging increases, so the current at the contact X decreases, and the voltage detecting unit 14 Detects the current and outputs a voltage state from the current to the control unit 15 '. Then, the control unit 15 'slightly reduces the power supply voltage output by the trickle power supply 13' according to the voltage state signal detected by the voltage detection unit 14 within a range where charging is not stopped.

The control unit 15 'has a trickle power source 1
When the output of 3'is reduced due to the completion of charging, the battery 31 is discharged, and after a lapse of time from the completion of charging, the voltage at which the battery 31 is self-discharging becomes smaller.
, The voltage detection unit 14 detects the current and outputs the voltage state from the current to the control unit 15 '.
The control unit 15 'controls the trickle power source 1 according to the voltage state signal.
The output of 3'is increased.

Further, the control unit 15 'includes a battery unit 3 which will be described later.
The trickle power supply 13 'is controlled according to the voltage corresponding to the temperature input from the thermistor 32. That is, when the voltage (voltage indicating the temperature) input from the thermistor 32 indicates that the voltage is higher than the constant temperature, the control unit 15 ′ determines how the voltage state signal input from the voltage detection unit 14 changes. Regardless, trickle power supply 1
3'is turned off so that the power supply voltage is not output.

Next, the switch 21 of the mobile telephone 2'is
It is turned on when the mobile phone 2'is not connected to the charger 1 ', and the circuit is closed so that power is supplied from the battery unit 3 to the control unit 22' via the connector D. When 2'is connected to the charger 1 ', OF
F is reached, and the circuit that supplies power from the battery unit 3 to the control unit 22 'is opened. As a result, the switch 21 O
During FF, power is supplied from the main body power supply 11 to the control unit 22 'through the connector A. The control unit 22 'supplies power to each unit (not shown) of the mobile phone 2'.

Next, the battery 31 of the battery unit 3 is a battery for charging, and when a voltage larger than a certain voltage is input,
This is what is called rapid charging, in which charging is completed in a short time. The battery 31 is charged by the power supply from the trickle power supply 13 'via the connectors D and B. Then, the thermistor 32 outputs a voltage corresponding to the temperature of the inside of the storage of the battery of the battery section 3 to the control section 15 'of the charger 1'via the connectors E and C.

The operation of the conventional charging system will be described. When the mobile phone 2'is connected to the battery charger 3'with the battery unit 3, the switch 21 of the mobile phone 2'is turned off, and the control unit 22 'has a power supply 11 for the main body of the charger 1'.
From the connector 31 and the battery 31 of the battery unit 3
Is supplied with a power supply voltage from the trickle power supply 13 'of the charger 1'via connectors B and D. Then, the battery 31 starts charging.

At this time, when the user talks on the mobile phone 2 ', the current flowing from the main body power source 11 of the charger 1'to the mobile phone 2'increases.

When the battery 31 is almost completely charged,
The current flowing through the contact X becomes small, and therefore the voltage detection unit 1
Trickle power supply 1 according to the voltage status signal output from 4
The voltage output by 3'is lowered by the control unit 15 ',
It was supposed to be charged.

[0018]

However, in the above-mentioned conventional charging system for a mobile phone, if the power supplied from the outside to the charger 1'has a small capacity such as when mounted on a vehicle, quick charging is performed. In order to do so, a quick charging power supply may be used in place of the conventional trickle power supply 13 ', and when a user talks during charging, an excessive current flows and the heat generation amount of the charger 1'is increased. Since it becomes large, it is necessary to attach a larger radiator, and as a result, the charger 1'becomes large and lacks portability, so that there is a problem that rapid charging cannot be practically performed.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a charging system for a mobile phone capable of performing rapid charging while keeping the size of the charger small.

[0020]

The invention according to claim 1 for solving the problems of the above-mentioned conventional example is a battery charging system, wherein the battery of the mobile phone is rapidly charged only when the mobile phone is not in a call state. It is characterized by charging, and by not performing rapid charging in a call state, excessive current does not flow to the charging charger, heat generation can be suppressed, and the battery of the mobile phone can be used while keeping the charger compact. Can be quickly charged.

According to a second aspect of the present invention for solving the above-mentioned problems of the conventional example, in a charging system, a battery unit having a rechargeable battery, and a mobile phone operated by the battery of the battery unit or an external power source. A charging system for charging the battery of the battery unit and supplying power to the mobile phone during charging, wherein the mobile phone outputs a call signal to the charger during a call. A power supply for the main body that directly supplies power to the mobile phone, a constant current power supply for rapid supply that supplies power to the battery of the battery unit, and the call. While the time signal is being input, the charger is characterized by having a controller on the charger side that controls the supply of power from the rapid constant-current power supply to quickly By not performing electrodeposition, no excessive current flows in the charger for charging is suppressed heat generation amount can be rapidly charging a battery of a mobile phone while the charger small.

[0022]

Embodiments of the present invention will be described with reference to the drawings. The charging system according to the present invention (this system) supplies power for quick charging only when the mobile phone is in the standby mode, and prevents an excessive current from flowing during a call, The heat generation of the charger is suppressed, the charger is downsized, and quick charging can be performed.

This system will be described with reference to FIG. FIG.
FIG. 3 is a configuration block diagram of a charging system according to the present invention. As shown in FIG. 1, the present system includes a charger 1, a mobile phone 2, and a battery unit 3.

Further, the charger 1 is composed of a main body power source 11, a rapid constant current power source 12, a trickle power source 13, a voltage detecting section 14, and a control section 15. Also,
The mobile phone 2 mainly includes a switch 21 and a control unit 22. The battery unit 3 is composed of a battery 31 and a thermistor 32. Since the battery unit 3 is the same as the conventional one, its description is omitted.

Next, each part of this system will be specifically described. The rapid constant-current power supply 12 of the charger 1 supplies power for rapidly charging the battery 31 via the connectors B and D. In addition, the rapid constant current power supply 12 includes a control unit 15
The magnitude of the output voltage is controlled by. The trickle power supply 13 is the conventional trickle power supply 1
3'is the same as that of 3 ', but differs from the prior art in that the output voltage is not controlled by the controller 15. The voltage detection unit 14 also has the same configuration and operation as the conventional one.

Similar to the conventional control unit 15 ', the control unit 15 responds to inputs from the voltage detection unit 14 and the thermistor 32 of the battery unit 3 in place of the conventional trickle power supply 13' and rapidly. The voltage output from the constant-current power source 12 is controlled. Further, in controlling the voltage, a call signal (a signal notifying the call) is received from the control unit 22 of the mobile phone 2, and the However, the point that the control method is changed is different from the conventional one.

That is, when the battery 31 approaches the end of charging and the current detected by the voltage detection unit 14 becomes small, the control unit 15 outputs the constant current power supply 12 for rapid control to the voltage output by the constant current power supply 12 for rapid operation according to the voltage state signal. The control is performed so as to decrease. Further, when the battery 31 is discharged and the current detected by the voltage detection unit 14 becomes large, the control unit 15 causes
The voltage state signal controls the constant current power supply for rapid use 12 so as to increase the voltage output from it.

Further, while the control unit 15 is receiving the call signal from the control unit 22 of the mobile phone 2, regardless of the voltage state signal output from the voltage detection unit 14, the control unit 15 supplies a constant current for rapid current. The power supply 12 is turned off.
The main body power supply 11 and the voltage detection unit 14 are the same as the conventional ones, and thus a detailed description thereof will be omitted.

Next, each part of the mobile phone 2 will be described. The mobile phone 2 of this system is almost the same as the conventional one, but the control unit 22 is slightly different. In addition to the conventional functions, the control unit 22 of the mobile phone 2 of this system has
While the user is talking on the phone, a call signal indicating that the user is talking is output to the control unit 15 of the charger 1 via the connector G.

Next, the operation of the present system will be described. The mobile phone 2 of this system includes the battery 3 and the charger 1
Switch 21 of the mobile phone 2 is turned off when connected to
The controller 22 is connected to the main body power supply 11 of the charger 1 via the connector A, and the battery 31 of the battery unit 3 is connected to the quick constant current power supply 12 of the charger 1 from the connectors F and D. Power is supplied to each via the. At this time, power is also supplied from the trickle power supply 13 to the battery 31 via the connectors F and D. And the battery 31
Starts charging.

When the user starts a call on the mobile phone 2, the control unit 22 of the mobile phone 2 outputs a call signal to the control unit 15 of the charger 1 via the connector G and inputs the call signal. The control unit 15 of the charger 1 that received the response turns off the rapid constant current power supply 12.

Since the mobile phone 2 is in a call state, the current flowing from the main body power supply 11 is large and the current supplied from the external power supply to the main body power supply 11 is also large. At this time, if current is also supplied to the rapid low-current power supply 12, an excessive current is supplied to the charger 1 and the amount of heat generated by the charger 1 also increases. Since the constant current power supply 12 is turned off, an excessive current is never supplied.

When the user finishes the call, the mobile phone 2 enters the standby state, so that the control unit 22 does not output the call signal. Then, the control unit 15 of the charger 1 turns on the rapid constant current power supply 12,
The charging of the battery 31 is restarted.

Then, when the charge of the battery 31 is close to the full state, the current at the contact point X becomes small, and therefore the constant current power supply for rapid 12 is turned off by the control unit 15 by the voltage state signal output from the voltage detection unit 14. Then, charging is completed.

According to the present system, quick charging is performed while the mobile phone 2 is in the standby state, but when in the call state,
Since quick charging is not performed, an excessive current does not flow, the heat generation amount of the charger 1 is small, and the radiator can be made small. Therefore, the charger 1 is small, which is excellent in portability and There is an effect that the quick charge can be surely controlled and performed.

Further, the present system may be arranged such that the battery section 3 is directly connected to the connectors F and C of the charger 1 by using the connectors D and E so that charging can be performed.

[0037]

According to the invention described in claim 1, since the charging system is configured to perform the rapid charging of the battery only when the mobile phone is not in the talking state, the rapid charging is not performed in the talking state. There is an effect that an excessive current does not flow to the charger for charging, the heat generation amount is suppressed, and the battery of the mobile phone can be rapidly charged while keeping the charger small.

According to the second aspect of the present invention, the control unit on the telephone side outputs the call-in-call signal, and the control unit on the charger side inputs the call-time signal to supply power from the rapid constant current power supply. Since it is a charging system that controls the supply to be stopped, by not performing rapid charging in the call state, excessive current does not flow to the charging charger, heat generation can be suppressed, and the charger can be carried while it is small. This has the effect of rapidly charging the phone battery.

[Brief description of the drawings]

FIG. 1 is a configuration block diagram of a charging system according to the present invention.

FIG. 2 is a configuration block diagram of a conventional charging system.

[Explanation of symbols]

1, 1 '... Charger, 2, 2' ... Mobile phone, 3 ... Battery unit, 11 ... Main body power supply, 12 ... Rapid constant current power supply, 13, 13 '... Trickle power supply, 14 ... Voltage detection unit, 15, 15 '... Control unit, 21 ... Switch,
22, 22 '... Control unit, 31 ... Battery, 32 ... Thermistor

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location H04M 19/08 H04B 7/26 Y

Claims (2)

[Claims] 1. A charging system, wherein the battery of the mobile phone is rapidly charged only when the mobile phone is not in a call state. 2. A battery unit having a rechargeable battery, a mobile phone operated by the battery of the battery unit or an external power source, a battery of the battery unit is charged, and power is supplied to the mobile phone during charging. In a charging system including a charger, the mobile phone is a mobile phone having a telephone-side control unit that outputs a call signal to the charger during a call, and the charger directly connects to the mobile phone. Power supply for the main body that supplies power to the battery, a constant current power supply for rapid supply that supplies power to the battery of the battery section, and the supply of power from the constant current power supply for rapid is stopped while the call signal is being input. A charging system, comprising: a charger having a controller on the side of a charger that performs control for controlling the charging system.