JPH11178229A - Charger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To charge a single secondary battery or an object to be charged with a single battery charger, even if the type or shape of the single secondary battery or the object to be charged of an electronic apparatus or the like which includes the secondary battery which is different. SOLUTION: A first charging output terminal 28 which matches the shape of a portable telephone which includes a secondary battery unit or a secondary battery, and a charging connector 29 for supplying charging power to a portable telephone which includes a single secondary battery or the single secondary battery with a shape other than the shape matching the first charging output terminal 28, are formed at a battery charger body 201. When the portable telephone which includes a single secondary battery or a secondary battery with a shape other than the shape matching the first charging output terminal 28, a charging cable 30 is used, which involves a connector 39 connected to the charging connector 29 at its one end, and involves the second charging output terminal 38 matching the portable telephone 40 at its other end.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device such as a portable information terminal which incorporates a secondary battery having a different shape and type or a secondary battery having a different type and has a different shape from the secondary battery alone. The present invention relates to a preferable charging device for charging an object to be charged.

[0002]

2. Description of the Related Art In recent years, the shape of a secondary battery built in an electronic device such as a portable information terminal such as a portable telephone or a secondary battery detachably mounted on the electronic device depends on the type and usage of the electronic device. It depends on the size of the power, etc.
There are various types of secondary batteries, such as lithium ion type and nickel cadmium type. Accordingly, these 2
The charger for charging the secondary battery must change the charging method according to the type of battery, and the shape of the mounting portion of the secondary battery to the charger must also match the shape of the secondary battery to be charged. . Also, in some cases,
The batteries have the same shape so that the same charger can be used in common.

[0003] Conventionally, a battery charging method in which the shape of a secondary battery is made the same and a charger can be commonly used even if the type is different is disclosed in JP-A-7-85893. In this type of conventional charger, a constant voltage circuit, a constant current circuit, a −ΔV detection circuit, a timer circuit,
A voltage / current detection circuit and a charge control circuit for controlling these circuits are incorporated. Further, the external shape of these secondary batteries is set so that lithium-ion and nickel-cadmium secondary batteries can be commonly mounted in the mounting portion of the charger. It is the same according to the shape of the mounting part of the charger.

When charging these secondary batteries, a battery classification circuit determines whether the secondary battery set in the mounting portion of the charger is a lithium-ion type or a nickel-cadmium type, and the charging control is performed according to the determination result. The circuit controls a constant voltage circuit, a constant current circuit, a −ΔV detection circuit, and a timer circuit so that a lithium-ion or nickel-cadmium secondary battery can be charged by the same charger.

[0005]

However, in the conventional battery charging method described above, since the external shape of the secondary battery is unified to the shape of the battery mounting portion of the charger, the secondary battery having the unified external shape is used. It becomes impossible to charge the secondary battery of the portable information terminal to which is not applicable. The same applies to an electronic device in which a portable information terminal incorporating a secondary battery is set and charged in a charger. Therefore, conventionally, when charging a secondary battery having a different external shape or a secondary battery of a portable information terminal incorporating the secondary battery,
It is necessary to provide a charger for each type having a mounting portion adapted to the external shape. In particular, in the present situation where electronic devices having different shapes and uses are widely used, such as mobile phones and personal digital assistants, preparing a dedicated charger adapted to each of these electronic devices causes an increase in the cost of the charger. There was a problem.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and is intended to provide a single rechargeable battery, even if the type or shape of a rechargeable object such as an electronic device incorporating the rechargeable battery is different. It is an object of the present invention to provide a charging device capable of charging a single secondary battery or an object to be charged with the battery charger described above.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to a secondary battery having a different shape and type or a secondary battery incorporated in an electronic device having a different shape from the secondary battery. A charging device for charging a charging object including: a charging method that selects a charging method suitable for a single secondary battery or a charging object different from the above-described type, and controls a charging control voltage, a charging current, and a charging time. A charger main body having a built-in circuit, wherein the charger main body is provided with a first charging output terminal adapted to a first shape of the secondary battery alone or the object to be charged; Is connected to the first output terminal for charging, and is used for supplying charging power to the single secondary battery or the secondary battery having a shape other than the first shape of the secondary battery or the charging target. Connector provided A charging cable having a connector connected to the charging connector at one end and having a second charging output terminal adapted to a single rechargeable battery having a shape other than the first shape or an object to be charged at the other end. It is provided with.

[0008] According to the charging device of the present invention, in addition to the first charging output terminal adapted to the first shape of the secondary battery alone or the object to be charged, the secondary battery having a shape other than the first shape. Since a charging cable having a second charging output terminal suitable for a single object or an object to be charged is provided,
Even if the type and shape of the object to be charged, such as a secondary battery alone or an electronic device incorporating a secondary battery, are different, the single battery or the object to be charged can be charged by a single charger.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a block diagram showing an electronic circuit portion of a first embodiment of a charging device according to the present invention. FIG. 2 is a diagram showing a charging device of FIG. 1 connected to a mobile phone (charging object) via a charging cable. FIG. 3 is a block diagram showing the case of connection and charging, FIG. 3 is an explanatory diagram showing details of each charging terminal part in the first embodiment, and FIG. 4 is a charging cable and its charging cable in the first embodiment. It is explanatory drawing which shows the structure of a terminal.

In FIG. 1, reference numeral 10 denotes an AC adapter for converting alternating current into direct current of a predetermined voltage, and reference numeral 20 denotes charging suitable for a secondary battery alone or a portable telephone having a built-in secondary battery by the direct current supplied from the AC adapter 10. Device 2 that performs
0, the charging device 20 includes a charger main body 201, and an input terminal of the charger main body 201 and the AC adapter 10
Are connected by connectors TM11 and TM12. The charger main body 201 has an input protection circuit 1
1, DC power supply unit 12, voltage adjustment unit 13, reference voltage generation unit 14, battery type selection switch 15, charge control unit 16, charge on / off switch 21, voltage detection unit 22, temperature detection unit 23, current detection unit 24, an output protection circuit 25, a first charging output terminal 28 conforming to the shape of a portable electronic device incorporating a secondary battery alone or a secondary battery, and a charging connector 29 are provided.

The input protection circuit 11 limits the DC output supplied from the AC adapter 10 to the charging device 20 and supplies the DC output to the DC power supply unit 12 and the reference voltage generating unit 14 and also controls the internal circuit of the charging device from overcurrent and the like. Protect. The reference voltage generator 14 generates a reference voltage and inputs the generated reference voltage to the DC power supply 12 and the charging controller 16. The DC power supply unit 12 uses a control signal output from the charge control unit 16 based on the temperature, voltage, current, and type selection information such as lithium ion type or nickel cadmium type of the secondary battery input to the charge control unit 16. And controlling the voltage and current required for charging the secondary battery to be constant. The voltage adjustment unit 13 adjusts the voltage to be charged according to the voltage of the secondary battery detected by the voltage detection unit 22. The battery type selection switch 15 selects a charging method of the secondary battery by setting the type of the secondary battery to be charged, such as whether it is a lithium ion type or a NiCd type, before charging, and sends a selection signal of the selection method to the charging control unit 16. Output to

The charge control section 16 comprises a quasi-constant current charging scheme setting section 16a, a timer control scheme setting section 16b, and a -ΔV control scheme setting section 16c which are set for each type of secondary battery. The voltage and the current output from the DC power supply unit 12 are controlled by changing the quasi-constant current charging method, the timer control method, and the −ΔV control method based on the selection signal from the control unit 15. The switch 21 is turned off by a command signal from the charging control unit 16 when an abnormality of the charger main body 201 or the end of charging of the secondary battery is detected. The output protection circuit 25 protects the secondary battery from the overcurrent when an overcurrent or the like occurs in the charging power output from the charger to the secondary battery. The voltage detecting section 22 detects the voltage of the secondary battery to be charged, the temperature detecting section 23 detects the temperature of the secondary battery to be charged, and the current detecting section 24 detects the temperature of the charged secondary battery. It detects the current of the secondary battery.

The first charging output terminal 28 has a charging terminal T connected to a charging input terminal of a secondary battery (not shown).
M21 (+), TM24 (-), and a voltage detection terminal TM22 and a temperature detection terminal TM23 for taking charge voltage and temperature information of the secondary battery into the charge control circuit 16 are provided.
The charging connector 29 is for supplying charging power to a single secondary battery having a shape other than the shape compatible with the first charging output terminal 28 or a mobile phone having a built-in secondary battery. The charging connector 29 is a charging terminal TM
21, TM24, and terminals connected to the voltage detection terminal TM22 and the temperature detection terminal TM23.

The mobile phone 4 through the charging connector 29
When charging a built-in secondary battery, a charging cable 30 shown in FIGS. 2 to 4 is used. The charging cable 30 has a four-core cable 301 as shown in FIGS. 4A and 4C, and one end of the cable 301 is shown in FIGS. 2, 3 and 4A. So that the charger body 201
A connector 39 detachably connected to the charging connector 29 is connected, and a second charging output terminal 38 suitable for the mobile phone 40 is connected to the other end. The second charging output terminal 38 provided on the charging cable 30 includes charging terminals TM31 (+) and TM34 (-).
A voltage detection terminal TM32 and a temperature detection terminal TM33 for taking the charging voltage and temperature information of the secondary battery of the mobile phone 40 into the charging control circuit 16 through the charging cable 30.
Is provided. In addition, terminals TM31 to TM34 are
As shown in (b), a magnet piece GG for connecting and holding the power supply terminal for the secondary battery in the mobile phone 40 is fixed.

FIG. 5 is an external view of a charger main body 201 containing the charger device having the circuit configuration shown in FIG. 1 and a mobile phone 40 with a secondary battery built in the charger main body 201 for charging. Is shown. In FIG. 5, in order to set the mobile phone 40 in the charger main body 201 in a chargeable state, a recess 27 corresponding to the lower shape of the mobile phone 40 is formed on the upper surface of the charger main body 201. A first charging terminal 28 having the structure shown in FIG. Therefore, if the mobile phone 40 is inserted into the concave portion 27 and the power supply terminal portion formed on the lower surface of the mobile phone 40 is connected to the first charging terminal 28, the secondary battery built in the mobile phone 40 can be used. Charging becomes possible.

That is, when charging the secondary battery of the mobile phone 40, the AC adapter 10 is connected to an AC power source,
After the type of the secondary battery of the set mobile phone 40 is selected by operating the selection switch 15, the mobile phone 40 is inserted into the recess 27 of the charger main body 201. In this state, the DC output from the AC adapter 10 is input to the DC power supply unit 12 and the reference voltage generation unit 14 through the input protection circuit 11, and the output voltage of the reference voltage generation unit 14 is supplied to the charge control unit 16. Along with this, the charging control unit 16 sets the current and voltage output from the DC power supply unit 12 based on the type information of the secondary battery selected by the selection switch 15 (data indicating whether it is a lithium ion type or a nickel cadmium type). The control is performed according to the secondary battery of the mobile phone 40 that has been set. Further, the charge control unit 16 adjusts the voltage charged in the secondary battery by controlling the voltage adjustment unit 13 according to the voltage of the secondary battery detected by the voltage detection unit 22.
Further, the charging control unit 16 detects the 2
The state of charge is monitored based on the voltage of the secondary battery, the temperature of the secondary battery detected by the temperature detection unit 23, and the current of the secondary battery detected by the current detection unit 24. And completion of charging. The switch 21 is controlled based on the result of this determination to turn on or off the charging. When the switch 21 is turned on, the charging output output from the DC power supply unit 12 and the voltage adjusting unit 13 is set in the recess 27 of the charger main body 201 from the output protection circuit 25 through the terminals TM21 and TM24 of the charging terminal 28. Mobile phone 4
0 is supplied to the built-in secondary battery, whereby the secondary battery is charged.

Therefore, in the portable telephone set 40 which can be set in the concave portion 27 of the charger main body 201, even if the type of the secondary battery contained therein is different, the type of the secondary battery charged by the selection switch 15 is different. , And setting the quasi-constant current charging method, the timer control method, and the -ΔV control method, it is possible to charge different types of secondary batteries with one charging device.

Next, a case where the built-in secondary battery of the portable telephone set 50 which cannot be set in the concave portion 27 of the charger main body 201 will be described with reference to FIG. In this case, as shown in FIG.
9 to the charging connector 29 of the charger body 201,
The terminals TM31 to TM34 of the second charging terminal 38
Is connected to each terminal 501 of the mobile phone 50. At this time,
The terminals TM31 to TM34 of the second charging terminal 38 are attracted and held by the terminals 501 of the mobile phone 50 by the magnet pieces GG. Thus, the shape of the mobile phone 50 that cannot be set in the concave portion 27 of the charger main body 201 is different by using the charging cable 30,
And even if the types of batteries are different, these secondary batteries can be charged by one charging device.

FIG. 7 is an explanatory diagram for charging a single secondary battery 70 having a shape that cannot be set in the concave portion 27 of the charger main body 201. In FIG. 7, the charging cable 3
0 is connected to the charging connector 29 of the charger main body 201, and each of the terminals TM of the second charging terminal 38 is connected.
31 to TM34 are connected to the respective terminals 701 of the secondary battery unit 70. At this time, each terminal TM3 of the second charging terminal 38
1 to TM34 are attracted and held by the terminals 701 of the secondary battery unit 70 by the magnet pieces GG. As a result, even if the secondary battery 70 has a shape that cannot be set in the concave portion 27 of the charger main body 201, the charging cable 30 is used. A single secondary battery can be charged by a single charging device.

FIG. 8 is an explanatory view of charging a built-in secondary battery of a portable terminal 80 such as a notebook personal computer having a shape that cannot be set in the concave portion 27 of the charger main body 201. This FIG.
In, the connector 39 of the charging cable 30 is connected to the charging connector 29 of the charger body 201, and the second
The terminals TM31 to TM34 of the charging terminal 38 are connected to the terminals of the portable terminal 80. At this time, the terminals TM31 to TM34 of the second charging terminal 38 are attracted and held by the terminals of the portable terminal 80 by the magnet pieces GG. Accordingly, even if the portable terminal 80 has a shape that cannot be set in the concave portion 27 of the charger main body 201 by using the charging cable 30, even if the shape and the type of the battery are different, these portable terminals can be used. 80 can be charged by one charging device.

FIG. 9 shows a charger main body 201 according to the present invention.
It is an explanatory view showing another embodiment. In the embodiment shown in FIG. 9, the AC adapter 10 is housed in the charger main body 201. According to this embodiment, since the AC adapter 10 is built in the charger main body 201, there is an effect that the handling of the charger main body 201 becomes easy.

In the above-described embodiment, the second charging terminal 38 of the charging cable 30 is adsorbed and held by the terminal of a secondary battery unit or a portable terminal with a built-in secondary battery charged by the magnet piece GG. However, the present invention is not limited to this, and the suction may be performed by a suction disk. In this case, it is effective even if the other party is a non-magnetic substance.

[0023]

As described above, according to the present invention, 2
In addition to the first charging output terminal adapted to the first shape of the secondary battery unit or the charging object, the second charging unit adapted to the secondary battery unit or the charging object having a shape other than the first shape By providing a charging cable having an output terminal, even if the type or shape of a charging object such as a secondary battery to be charged alone or an electronic device having a built-in secondary battery is different, without depending on this. In addition, the secondary battery alone or the object to be charged can be charged by a single charger.

According to the present invention, there is provided a selection switch for selecting a type of a battery to be charged, and a charge control means for charging the battery in accordance with the characteristics of the battery based on the type of the battery selected by the selection switch. By having
Even if the type of the battery changes, it can be charged correspondingly. Further, according to the present invention, the second charging terminal of the charging cable is configured to be able to be attracted to and held by the secondary battery to be charged or the power supply terminal of the object to be charged. Alternatively, the second charging terminal of the charging cable may be set to 2 without depending on the shape of the charging object.
The secondary battery can be easily connected to the single battery or to the power supply unit of the object to be charged, and the electric connection can be stably performed.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an electronic circuit portion of a first embodiment of a charging device according to the present invention.

FIG. 2 is a block diagram showing a case where the charging apparatus of FIG. 1 is connected to a mobile phone via a charging cable to perform charging.

FIG. 3 is an explanatory diagram showing details of each charging terminal portion in the first embodiment.

4A is an explanatory view showing a structure of a charging cable and a charging terminal according to the first embodiment, FIG. 4B is an enlarged view showing a terminal part in detail, and FIG. It is a figure showing a structure.

FIG. 5 is an external view of a charger main body incorporating the charger device having the circuit configuration shown in FIG. 1 and a mobile phone incorporating a secondary battery set in the charger main body for charging.

FIG. 6 is an explanatory view of charging a built-in secondary battery of a mobile phone having a shape that cannot be set in a recess of a charger main body containing the charger device having the circuit configuration shown in FIG. 1;

FIG. 7 is an explanatory diagram in the case of charging a single secondary battery having a shape that cannot be set in a recess of a charger main body incorporating the charger device having the circuit configuration shown in FIG. 1;

FIG. 8 is an explanatory diagram for charging a built-in secondary battery of a portable terminal having a shape that cannot be set in a recess of a charger main body containing the charger device having the circuit configuration shown in FIG. 1;

FIG. 9 is an explanatory view showing another embodiment of the charger main body 201 according to the present invention.

[Explanation of symbols]

10 AC adapter, 11 Input protection circuit, 12
... DC power supply unit, 13 ... voltage adjustment unit, 14 ... reference voltage generation unit, 15 ... selection switch, 16 ... charge control unit,
16a: quasi-constant current charging method setting section, 16b: timer control method setting section, 16c: -ΔV control method setting section, 2
0 ... charging device, 201 ... charger body, 21 ... switch, 22 ... voltage detection unit, 23 ... temperature detection unit, 24
... Current detector, 25 output protection circuit, 27 recess, 28 first charging terminal, 29 charging connector, 30 charging cable, 38 second charging Terminals, 39: Connector, 40, 50: Mobile phone, 7
0: a secondary battery alone, 80: a portable terminal.

Claims (7)

[Claims] 1. A charging device for charging an object to be charged including a secondary battery having a different shape and type or a secondary battery incorporated in an electronic device having a different shape from the secondary battery alone, A charging method suitable for a single secondary battery or an object to be charged, and a charging control circuit for controlling a charging control voltage, a charging current and a charging time. Providing a first charging output terminal adapted to a first shape of the secondary battery alone or the object to be charged; and further comprising a charger main body connected to the first charging output terminal; A charging connector for supplying charging power to a secondary battery alone or a secondary battery having a shape other than the first shape of the charging object, and a connector connected to the charging connector at one end; Yes , The charging apparatus comprising: a charging cable having a second charging output terminal adapted to secondary batteries alone or charging object having a shape other than the first shape to the other end. 2. The apparatus according to claim 1, further comprising a selection unit for selecting a type of the secondary battery to be charged or a type of an object to be charged,
The selection means selects a charging method suitable for the rechargeable battery or the object to be charged, thereby operating the charge control circuit to control a charging control voltage, a charging current and a charging current suitable for the rechargeable battery or the object to be charged. The charging device according to claim 1, wherein the charging time is controlled. 3. The battery charger according to claim 1, wherein the charger main body has a first shape.
The charging device according to claim 1, further comprising a recess in which a secondary battery alone or an object to be charged is set, wherein the first charging output terminal is provided in the recess. 4. The charge output circuit according to claim 1, wherein the first charge output terminal includes a voltage detection terminal and a temperature detection terminal for taking charge voltage and temperature information of the single secondary battery or the object to be charged into the charge control circuit. 4. The charging device according to 1, 2, or 3. 5. A second cable provided at the other end of the charging cable.
3. The charging device according to claim 1, wherein the charging output terminal includes a voltage detection terminal and a temperature detection terminal for taking charge voltage and temperature information of the secondary battery alone or the battery to be charged into the charge control circuit. 4. 6. The second charging output terminal includes an adsorption member for connecting and holding the second charging output terminal to a power supply terminal of the secondary battery alone or a battery to be charged. 2. The charging device according to 2. 7. The charging device according to claim 6, wherein the attraction member comprises a magnet piece or an attraction disk.