JPH0340638A - Automobile telephone system - Google Patents

Abstract

PURPOSE:To prevent the consumption of an on-vehicle battery and to avoid unexpected full consumption of battery by applying charging to a charging battery when a voltage of the on-vehicle battery is a prescribed voltage or above regardless of on/off a power switch. CONSTITUTION:With an ignition switch S turned on, a battery voltage detection in a battery voltage detection circuit 2041 is started. When the battery voltage of a prescribed voltage or alove is detected by the battery voltage detection circuit 2041, a 1st battery power control switch 2042 and a 2nd battery power control switch 2044 are set to be ON respectively. A power voltage 13.7V from an on-vehicle battery B is supplied to a charging battery 109 of a portable radiotelephony set 100. A voltage detection circuit 117 detects the voltage of a power supply line 116 and when the portable radiotelephony set 100 is connected to an on-vehicle adaptor 200, the charging voltage 109 and the voltage control section 108 of the portable radiotelephony set 100 are disconnected and the charging battery 109 charged.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a car telephone device such as a handbelt◆votaple car phone.

(Prior Art) A car phone is one of the means for constructing a communication network including mobile objects. This car phone mainly consists of a mobile station antenna, a mobile radio, and a portable phone, and is configured so that the power required for each circuit is obtained from the car's battery.

By the way, recently, in order to improve the convenience of car phones, detachable car phone devices such as handbelt portable car phones have been developed that allow calls to be made and received using car phone lines even when the phone is taken out of the car. and is attracting attention.

This detachable car telephone device consists of a portable radio telephone and an in-vehicle adapter, and the portable radio telephone is equipped with an antenna, a radio, a rechargeable Th battery, and the like.

When using this mobile wireless phone by removing it from the car adapter, the built-in rechargeable battery becomes the power source, and this rechargeable S battery can be charged by connecting the mobile wireless F4 phone to the car adapter. This is done by supplying power to a rechargeable battery.

Now, in such a car telephone device, if the ignition of the car and the power switch of the car phone device are both turned on, the charging operation to the rechargeable battery is performed even if the engine of the car is not running.

FIG. 3 shows the configuration of the power supply function and the charging function for the rechargeable battery in this car telephone device.

In the figure, reference numerals 10 and 20 indicate power supply control systems in a portable radio telephone and an in-vehicle adapter, respectively.

Further, B is an automobile battery (hereinafter referred to as an on-vehicle battery), and S is an ignition ◆ switch. Furthermore, in the m source control system 10 of the mobile radio telephone, 11 is a full i4m
12 is an electric battery [an electric power supply that supplies pressure to each part]. R control section,
13 is a power supply changeover switch that switches the connection between either the rechargeable battery 11 or the power supply line 14 from the in-vehicle adapter and the power supply control unit 12; 15 is the power supply line 14;
detects the voltage of the mobile wireless phone to determine whether or not it is connected to the in-vehicle adapter, and if it is connected, the power supply switch/chie is set so that power is supplied from the power supply line 14 to the power supply control unit 12. This is a voltage detection circuit that drives the power source changeover switch 13 so that power is supplied from the rechargeable battery 11 to the power source control section 12 if the rechargeable battery 11 is not connected. In addition, the power control system 2 in the in-vehicle adapter
, 21 is a power switch that is the main switch of the car phone device, 22 is a battery power control switch that switches 0N10FF of power supply from the car battery B to the car phone device, and 23 is a power supply switch that is connected from the car battery B (1). Nothing! It is a regulator that regulates the voltage to be supplied to the power control unit 12 of the liI telephone.

Next, the operation of this power supply control system will be explained.

When the voltage of the vehicle battery B is at a normal voltage value and the ignition switch S and the power switch 21 of the car telephone device are both ON, the battery power control switch 22 is turned ON.

As a result, the power supply voltage IL supplied from the vehicle battery B
The 7V is regulated to 7.2V by the regulator 23 and supplied to the power control section 12 of the portable radio telephone. On the other hand, power supply voltage 13 supplied from vehicle battery B
．． 7V is supplied to the rechargeable battery 11 of the mobile radio telephone,
As a result, the rechargeable battery 11 is charged.

Also, at this time, the voltage detection circuit 15 detects the voltage/! i! The voltage of the supply line 14 is detected to check whether the portable N wireless telephone is connected to the 1JIIt adapter, and if the connection is confirmed, the power selector switch 13 is activated to start charging! 1 battery 11
and the m-source control unit 12 are separated.

However, in the automatic 41 telephone device that charges the rechargeable battery 11 with such a circuit configuration, even if the engine is not running, if the ignition switch S and the power switch 21 of the car telephone device are both ON, the charging 7 will start.
Since the i-Battery 11 will be charged, the in-vehicle battery B
There was a risk that the battery would run out and cause the battery to run out unexpectedly.

Also, when the power switch 21 is OFF, the battery 11 will not be charged even if the engine is running, so the power switch 21 should be turned OFF every time the engine is started.
I had to make it N. However, drivers who pay attention to driving tend to forget these operations.
It has been difficult to always store sufficient charge in a rechargeable battery in preparation for portable use of a portable radio telephone.

(Problem to be Solved by the Invention) In this way, in the conventional detachable car phone device, the rechargeable battery of the portable wireless phone is charged even when the car engine is not running, so the 1ia battery is not consumed. In addition, it is difficult to always store sufficient charge in the rechargeable battery in preparation for use of the portable radio telephone.

The present invention is intended to solve these problems, and is capable of preventing the exhaustion of the vehicle battery due to charging the rechargeable battery of the mobile radio telephone, and ensuring that the mobile radio telephone always has sufficient charge for portable use. The purpose of the present invention is to provide a car telephone device that can store information in a rechargeable battery.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above-mentioned object, the automobile telephone device of the present invention includes a portable radio telephone with a built-in rechargeable battery and a connection part to which the portable radio telephone can be attached and detached. and an in-vehicle adapter that supplies power from the in-vehicle battery to the portable radio telephone and charges the rechargeable battery when the portable radio telephone is connected, wherein the charging function of the in-vehicle adapter is turned on/off. It is equipped with a switching means for switching, and a battery voltage detection means for detecting the voltage of the vehicle battery, and when the battery voltage detection means detects a battery voltage higher than a predetermined voltage, the switching is performed regardless of the on/off state of the power switch. The device is configured to control the means to turn on the charging function of the in-vehicle adapter.

(Function) In the car telephone device of the present invention, the battery voltage detection means detects the voltage of the vehicle battery, and when a battery voltage higher than a predetermined voltage is detected in the detection result,
The charging function of the in-vehicle adapter is turned on by controlling the switching means without changing the on/off state of the power switch.

Therefore, if the voltage of the in-vehicle battery is less than a predetermined voltage value, the rechargeable battery will not be charged even if the power switch is turned on, which prevents the in-vehicle battery from being depleted and prevents the battery from dying unexpectedly. You can prevent this from happening, and you can always charge your mobile radio phone with enough electricity for use! It can be stored in a battery.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram for explaining the configuration of a detachable car telephone device according to an embodiment of the present invention.

The detachable car telephone device shown in the figure is composed of a portable radio telephone 100 and an in-vehicle adapter 200.

The mobile radio telephone 100 includes a mobile antenna 101, a changeover switch 102, a radio section 103 that establishes a radio line with a base station (not shown) and transmits signals, and a control section 10.
4 and an audio unit 105, an audio/control unit 106 that performs overall control of the entire device, and a system ID of the zone corresponding to the location where this device is registered.
An IDROM 107 in which a number and a telephone number corresponding to the location where this device is registered is registered, a power supply control unit 108 that supplies power voltage to each part, a rechargeable battery 109 that serves as a power source when carried, and a mobile radio telephone 100 are installed in the vehicle. A connection section 110 for connecting to the adapter 200, an operation display section 111, and a speaker 112 for inputting and outputting audible sounds.
and microphone 113, output amplifier 114, input amplifier 1
15. From the car adapter 200? 1! source supply line 1
16 voltage detection circuit 117, rechargeable battery 1
09 or the power supply line 116 and the power supply control unit 108.
8.

The operation display section 111 described above includes a key section 111a where a predetermined key is manually operated, and a display section 11a where a predetermined display is performed.
1b, a switch unit 111c where various switching is performed,
key part 111a, display part 111b and switch part 1
11c.

The output amplifier 114 amplifies the audio signal sent from the audio section 105 of the mobile radio telephone 100 and outputs it to the speaker 1.
Output from 12. The input amplifier 115 is connected to the microphone 113
Amplifies the audio signal input from. The amplified signal is input to the audio section 105 of the mobile radio telephone 100. The operation/display control section 111d performs overall control of the operation/display section 111 based on the control signal sent from the audio/control section 106, and also controls the key section 111a.
Control signals input from the audio/control unit 106
Send to. The display unit 111b includes a liquid crystal display and a display driver (not shown), and the display driver drives the liquid crystal display to perform a predetermined display under the control of the operation/display control unit 111d. Also, Ki part 111
a is the number key "9" from rOJ "*", "#", r
SND”, rsTOJ, rENDJ, rRCLJ, rF
CNJ, rcLRJ, “EMRJ, rMUTE”, rT
It consists of a keypad (not shown) such as ONEJ function keys, and when the keypad is pressed, this is recognized by the operation/display control unit 111d.

The switch section 111C is provided with a hook switch and an ON10 FF switch (not shown).
The hook switch detects on-hook or off-hook of Ij'e 4'fr radiotelephone 00.

The voltage control circuit 117 detects the voltage of the power supply line 116 from the in-vehicle adapter 200 and controls the flexible wireless telephone 10.
0! It is determined whether or not it is connected to the 1i cultivation adapter 200. If the connection is confirmed, the voltage supply lines 116 to 21! [The power changeover switch 118 is driven so that the 1i source is supplied to the control unit 108, and the changeover switch 102 is driven so that the wireless unit 103 and the booster 202 are connected. If the connection is not confirmed,
The lane changeover switch 118 is driven so that power is supplied from the rechargeable battery 109 to the power supply control unit 108, and the changeover switches 1 and 02 are driven so that the wireless unit 103 and the antenna 101 are connected.

The in-vehicle adapter 200 is an antenna 2 attached to a vehicle.
01, a booster 202 that amplifies the signal transmitted and received by the antenna 201 to a constant power;
Does the control unit 203 supply power from the vehicle battery B to each part? Power supply control unit 204, portable radio telephone 1. A connection part 205 connected to the connection part 110 of OO via a cable 300 of the same width, and a speaker 2 for outputting audible sound.
06, a microphone 207, an output amplifier 208, and a human power amplifier 209 constitute the main toilet section.

The booster 202 described above has an antenna duplexer 210.2.
11. Automatic power charge 11 that controls the transmission level of the receiving amplifier 212, the transmitting amplifier 213, and the transmitting amplifier 213
It consists of 11 circuits (APC) 21.4.

Next, the power supply control section 204 of the above-mentioned in-vehicle adapter 200
The configuration will be explained using FIG.

As shown in the figure, the m1ll control unit 204 includes a battery voltage detection circuit 204 that detects the voltage of the vehicle battery B when the ignition switch S of the vehicle is turned on.
1. When the battery voltage detection circuit 2041 detects a battery voltage higher than a predetermined voltage, the main battery B
The first battery power control switch 2042 is driven so that a power supply voltage of 100 Ω is supplied to the rechargeable battery 109, and the battery voltage detection circuit 2041 detects a battery voltage equal to or higher than a predetermined voltage, and the power supply is the main switch of the entire device. When the switch 2043 is turned on, the second battery power control switch 2044 is driven so that the power supply voltage of the vehicle battery B is supplied to the power supply control unit 108 of the mobile radio telephone 100, and the second battery voltage [control switch A regulator 2045 is provided to regulate the voltage to be supplied to the power supply control section 108 of the wireless telephone 100 through the regulator 2044.

Next, the operation of this power supply control system will be explained.

First, when the ignition switch S of the automobile is turned on, detection of the battery voltage in the battery voltage detection circuit 2.41 is started.

When the power switch 2043 of the car phone device is ON,
When battery voltage detection circuit 2041 detects a battery voltage equal to or higher than a predetermined voltage, first battery power control switch 2042 and second battery 11M control switch 2044 are each set to ON.

Accordingly, the power supply voltage i3 supplied from the on-board battery B
7V is regulated to 7.2V by the regulator 2045 and supplied to the power control section 108 of the portable radio telephone 100 through the power supply line 116. on the other hand,
Is the power supply voltage L3.7V from the vehicle battery B used to charge the Iy4 Tei wireless telephone 100? is supplied to pond 109. At this time, the voltage detection circuit 117 of the portable wireless phone 100 detects the voltage of the power supply line 116 to check whether the portable wireless phone 100 is connected to the in-vehicle adapter 200 and confirms the connection. The Ti source changeover switch 118 is driven so that the ten rechargeable batteries are disconnected from the power supply control unit 108 of the mobile radio telephone 100. As a result, the rechargeable battery 109 is charged, and the supply of power from the rechargeable battery 109 to the power control unit 108 of the mobile radio telephone 100 is stopped.

Further, when the power switch 2043 of the car phone device is ON, if the battery voltage detection circuit 2041 detects a battery voltage lower than a predetermined voltage, the first battery power control switch 2042 and the second battery power control switch 2044 are each set to OFF.

As a result, the portable wireless telephone 100 is connected to the vehicle battery B.
The power supply to the rechargeable battery 109 is stopped, and at the same time, the power supply from the in-vehicle battery B to the power supply control unit 108 of the mobile radio telephone 100 is also stopped.

Furthermore, the 71S source switch 2043 of the car telephone device
If the battery voltage detection circuit 2041 detects a battery voltage equal to or higher than a predetermined voltage while the battery voltage detection circuit 2041 is OFF, the first battery power control switch 2042 is turned ON and the second battery power control switch 2044 is set OFF.

As a result, the rechargeable battery 10 of the wireless telephone 100
9 is charged, but the power supply to the power control unit 108 of the mobile radio telephone 100 is stopped.

Furthermore, the power switch 2 (] 43 of the car telephone device
If the battery voltage detection circuit 2041 detects a battery voltage lower than a predetermined voltage when m
The l battery power control switch 2042 and the second battery power control switch 2044 are each set to OFF.

As a result, the rechargeable battery 109 of the portable radio telephone 100 is charged and the power control unit 108 of the portable radio telephone 100 is charged.
The power supply to each will be stopped.

In this way, in the detachable car phone device of this embodiment, regardless of the 0N10FF status of the power switch 2043 of the car m-packing device, if the car ignition is ON and the voltage of the car battery B is above a predetermined voltage, the car phone can be installed in the car. Battery B
I don't have a cell phone? ! ! Power is supplied to the rechargeable battery 109 of the filling machine 100, and the rechargeable/l! Charge 2109.

Therefore, if the voltage of the vehicle battery B is less than a predetermined voltage value, such as when the ignition is ON but the vehicle engine is not running, the rechargeable battery 10 is
9 is not charged, it is possible to prevent the in-vehicle battery B from being exhausted due to charging. Furthermore, since charging of the rechargeable battery 109 automatically starts when the voltage of the vehicle battery B reaches a predetermined voltage or higher without turning on the power switch 2043, the charging of the rechargeable battery 109 is automatically started when the voltage of the vehicle battery B reaches a predetermined voltage or higher. Sufficient charge can be stored in the rechargeable battery 109.

Furthermore, in this embodiment, even when the engine is not running, if the power switch 2043 is turned on when the voltage of the vehicle battery B is equal to or higher than a predetermined voltage, power is supplied to the mobile radio telephone 100. It becomes possible to make a call.

[Effects of the Invention] As explained above, according to the car telephone device of the present invention,
Regardless of the power switch's 0N10FF setting, if the voltage of the in-vehicle battery is higher than the predetermined voltage, the rechargeable battery will be charged. It is possible to always store sufficient charge in the rechargeable battery for portable use of the telephone.

[Brief explanation of drawings]

FIG. 1 is a block diagram for explaining the configuration of a detachable car phone device according to an embodiment of the present invention, FIG. 2 is a diagram for explaining the configuration of the power control section of the in-vehicle adapter in FIG. 1, FIG. 3 is a diagram showing the configuration of a power supply function and a charging function for charging 8 batteries in a conventional detachable car telephone device.B...Car battery, 100...Mobile radio telephone,
109... Rechargeable battery, 200... Car adapter, 2
04...7 are source control units, 2041... battery voltage detection circuits, 2042... first battery power control switches, 2043...7Ii? IA switch, 2044
...Second battery power control switch. Same questioner

Claims (1)

[Scope of Claims] A portable radio telephone with a built-in rechargeable battery, and a connection part that allows the portable radio telephone to be attached and detached, and when the portable radio telephone is connected, power is supplied to the portable radio telephone from an in-vehicle battery and the charging is performed. A car phone device equipped with an in-vehicle adapter for charging a battery, comprising a switching means for switching on/off a charging function of the in-vehicle adapter, and a battery voltage detection means for detecting a voltage of the in-vehicle battery, When the battery voltage detection means detects a battery voltage equal to or higher than a predetermined voltage, the switching means is controlled to turn on the charging function of the in-vehicle adapter regardless of the on/off state of the power switch. Characteristic car telephone device.