JPH0344220A - Battery charger for cordless telephone set - Google Patents

Abstract

PURPOSE:To charge a battery with an optimum charge current and a charging time suitable for each battery by sending a data such as a required charge current and charge time from a cordless telephone set at charging since a battery wear is discriminated through the measurement of a speech time. CONSTITUTION:When a telephone set side charging terminal 3 of a cordless telephone set 1 and a charger side charge terminal 4 of a charger 2 are connected, a means 7 measures the speech time to calculate the battery wear thereby calculating data such as required charge current and charging time. The data is sent from the telephone set side charging terminal 3 or a telephone set side exclusive terminal 5 with a transmission section 8, received by a reception section 10, a means 11 sets a charging current to a current supply section 12 based on the reception to command the charging start. When the charging time elapses, the means 11 commands the charge stop to the current supply section 12, which interrupts the charging current supplied to a battery 9 and then the charging of the battery 9 is terminated. Thus, the possibility of overcharge is precluded and the battery is charged in the shortest time without excess and deficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for charging a battery of a mobile phone (hereinafter referred to as a cordless phone), which is a cordless phone device.

[Conventional technology and its issues]

In places such as offices where many cordless telephones are used, it is conceivable that the cordless telephone charger is shared by an unspecified number of cordless telephones. In this case, since the charging current, charging time, etc. of each cordless phone battery are different, charging must be performed in accordance with the charging current, charging time, etc. However, since there was no configuration for charging in this way, it was necessary to charge the battery optimally for each battery. Not only will it not be possible to charge the battery and there is a risk of overcharging, but it will also cause damage to the batteries, especially those of cordless phones.
When an i-Cd battery is used, the battery voltage fluctuates depending on the ambient temperature, making it impossible to accurately determine the remaining capacity of the battery. This makes it difficult to charge the battery in the shortest possible time, and there is a risk of overcharging.

Therefore, the present invention provides a battery charging device for cordless telephones that, when a single charger is shared by a large number of cordless telephones, can charge the batteries of each cordless telephone with the optimal charging current and charging time suitable for each battery. The purpose of the present invention is to provide a charging device that eliminates the risk of overcharging, does not cause problems even when using Ni-Cd batteries, charges in the shortest possible time without overcharging, and has no risk of overcharging. It is something to do.

[Means to solve the problem]

In order to solve the above-mentioned problems and achieve the above-mentioned objects, the first device of the present invention calculates the battery consumption by measuring the talk time and calculates the battery consumption in the cordless telephone 1 as shown in the first diagram. Based on the required charging current.

A means 7 for calculating data such as charging time, a transmitter 8 for transmitting data output from the means 7, and a battery 9 to be charged are provided, and a battery 9 connected to the outside of the telephone l is provided. A charging terminal 3 on the phone side is provided, a transmitting section 8 is connected to this charging terminal 3, and a receiving section 10 that receives data sent from the transmitting section 8 is provided in the charger 2. means 11 for instructing to set charging current, charging time, start charging, and stop charging based on the data;
A current supply unit 12 in which charging current and charging time are set by this means 11, and instructions to start charging and stop charging are given.
A charger-side charging terminal 4 connected to a current supply section 12 is provided on the outer surface of the charger 2, and a receiving section 10 is connected to the charging terminal 4.

In order to solve the same problem and achieve the same purpose, the second device of the present invention has a terminal 5 dedicated for data on the telephone side on the outer surface of the cordless telephone 1 and the outer surface of the charger 2, respectively, in the first device, as shown in the second figure. A data-only terminal 6 on the charger side is provided, and instead of being connected to the phone-side charging terminal 3 and the charger-side charging terminal 4, respectively, the transmitter 8 and the receiver 10 are connected to these data-only terminals 5 and 6, respectively. It is structured as follows.

[For production]

The first aspect of the present invention. When charging the battery 9 of the cordless telephone 1 in the second device, when the telephone side charging terminal 3 of the cordless telephone 1 and the charger side charging terminal 4 of the charger 2 are connected, the talk time is measured by means 7 and the battery is charged. The consumption amount is calculated, and data such as the required charging current and charging time are calculated based on this.

The data output from this means 7 is transmitted by a transmitter 8 from the telephone side charging terminal 3 or the telephone side data exclusive terminal 5.

This transmitted data is received by the receiving unit 10 via the charger-side charging terminal 4 or the charger-side data-dedicated terminal 6. Based on the received data, the means 11 sets a charging current for the current supply section 12 and instructs it to start charging. Upon receiving this instruction, the current supply unit 12 supplies the set charging current to the battery 9 via the charger-side charging terminal 4 and the telephone-side charging terminal 3, and the battery 9 is thereby charged.

When the charging time has elapsed, the means 11 instructs the current supply section 12 to stop charging, and the current supply section 12 receives this instruction.
The charging current supplied to the battery 9 is cut off, and charging of the battery 9 is completed.

〔Example〕

The present invention will be described in detail below based on the drawings.

FIG. 1 is a block diagram showing the configuration of a first embodiment of the apparatus of the present invention.

In FIG. 1, 1 is a cordless telephone and 2 is a charger. Inside the cordless telephone 1, there is a call time counter 13 that measures the call time, and the battery consumption is calculated based on the call time measured by this counter 13, and data such as the required charging current and charging time are calculated based on this. Central processing unit 14
A transmitter 8 that transmits data output from the device 14, and a battery 9 that is charged are provided. The call time counter 13 and the central processing unit 14 constitute means 7.

A telephone charging terminal 3 connected to a battery 9 is provided on the outer surface of the cordless telephone 1, and a transmitting section 8 is connected to the charging terminal 3.

Inside the charger 2, there is a receiving section 10 that receives data sent from the transmitting section 8, and a device for setting charging current, charging time, starting charging, and stopping charging based on the data received by this receiving section 10. A central processing unit 11 that issues instructions, and this device 11
The charging current and charging time are set, and charging starts.
A current supply unit 12 is provided to which an instruction to stop charging is given. A charger-side charging terminal 4 connected to the current supply unit a is provided on the outer surface of the charger 2, and a receiving unit 10 is connected to the charging terminal 4.

In the first embodiment with such a configuration, when charging the battery 9 of the cordless telephone 1, when the telephone side charging terminal 3 of the cordless telephone 1 and the charger side charging terminal 4 of the charger 2 are connected, the call time counter 13 The call time is measured, and the battery consumption amount is calculated by the central processing unit 14. Based on this, data such as the required charging current and charging time are calculated. The data output from the central processing unit 14 is transmitted by the transmitter 8 from the telephone charging terminal 3.

This transmitted data is received by the receiving unit 10 via the charging terminal 4 on the charger side. Based on the received data, the central processing unit 11 sets a charging current to the current supply unit 12 and instructs the current supply unit 12 to start charging.

Upon receiving this instruction, the current supply unit 12 supplies the set charging current to the battery 9 via the charger-side charging terminal 4 and the telephone-side charging terminal 3, and the battery 9 is thereby charged.

When the charging time has elapsed, the central processing unit 11 instructs the current supply section 12 to stop charging, and upon receiving this instruction, the current supply section 12 cuts off the charging current supplied to the battery 9 and stops charging the battery 9. finish.

In this manner, data is supplied from the charger 2 by transmitting data from the cordless telephone 1 to the charger 2 when charging the battery of the cordless telephone 1. The battery 9 will be charged for the required charging time with the required charging current suitable for the battery 9 of the telephone 1, and the charging of the battery 9 will be completed in the shortest possible time without excess or deficiency.

FIG. 2 is a block diagram showing the configuration of a second embodiment of the device of the present invention, and this second embodiment is similar to the first embodiment shown in FIG. A data-only terminal 5 on the phone side and a data-only terminal 6 on the charger side are respectively provided, and instead of being connected to the phone side charging terminal 3 and the charger side charging terminal 4, respectively, these data-only terminals 5 and 6 are connected to the transmitting section 8 and 6, respectively. This is achieved by connecting the receiving section 10.

In this second embodiment, the data output from the transmitter 8 is sent to the data terminal 5 on the telephone side. The description can be made in the same manner as in the first embodiment except that the data is input manually to the receiving section 10 via the charger-side data-dedicated terminal 6.

Note that a microcomputer, an information processing device, an arithmetic device, etc. can be used as the central processing units 14 and 11.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, when one charger 2 is shared by a large number of cordless telephones 1 in a cordless telephone battery charging device, battery consumption can be determined by measuring talk time. , each cordless phone 1 transmits data such as the required charging current and charging time from the cordless phone 1 to the charger 2 during charging.
batteries 9 can be charged with the optimal charging current and charging time suitable for each battery 9, and there is no risk of overcharging, especially when using Ni-Cd batteries. It is safe because it can be charged in the shortest possible time and there is no risk of overcharging, and the battery life can be extended.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the structure of a first embodiment of the apparatus of the present invention, and FIG. 2 is a block diagram showing the structure of a second embodiment of the apparatus of the present invention. 1... Cordless phone, 2... Charger, 3... Charging terminal on the phone side, 4...
Charger side charging terminal, 5... Phone side data-only terminal, 6... Charger side data-only terminal, 7...
...means, 8...transmission section, 9...
Battery, 10... Receiving unit, 11... Means (central processing unit), 12... Current supply unit, 13... Talking time caranta, 14... ...Central processing unit.

Claims (2)

[Claims] (1) Inside the cordless phone, the battery consumption is calculated by measuring the talk time, and the required charging current is calculated based on this.
A means for calculating data such as charging time, a transmitter for transmitting data output from this means, and a battery to be charged are provided, and a telephone side charging terminal connected to the battery is provided on the outer surface of the telephone. A transmitter is connected to this charging terminal, and a receiver is provided in the charger to receive data sent from the transmitter, and a charging current and charging time are set based on the data received by the receiver. The charger is provided with a means for instructing to start charging and to stop charging, and a current supply section for setting the charging current and charging time and giving instructions to start charging and stopping charging, and to provide a current supply section on the outer surface of the charger. A battery charging device for a cordless telephone, comprising a charger-side charging terminal connected to a supply section and a receiving section connected to the charging terminal. (2) Provide a data-only terminal on the phone side and a data-only terminal on the charger side on the outside of the cordless phone and the outside of the charger, respectively, and use these data-only terminals instead of connecting to the phone side charging terminal and the charger side charging terminal, respectively. A battery charging device for a cordless telephone according to claim 1, wherein a transmitter and a receiver are respectively connected to the cordless telephone.