JPH07296787A - Battery pack - Google Patents

Abstract

PURPOSE:To make a load usable for a prescribed time even without carrying a spare battery when the voltage of a secondary battery is lowered. CONSTITUTION:A battery pack has a manual generator 6, a small capacity first capacitor 7 charged by the operation of the manual generator 6, a large capacity second capacitor 10 charged when the current exceeding the capacity of the first capacitor 7 is supplied from the manual generator 6, and a circuit for supplying the current to a secondary battery 1 when the current exceeding the capacity of the second capacitor 10 is supplied from the manual generator 6. When the voltage of the secondary battery 1 is lowered during the use of a load, the load can be used for a prescribed time without being connected to a charger by operating the manual generator 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery pack which can be used by directly charging a rechargeable battery by directly connecting it to a charger and charging it as it is with a load.

[0002]

2. Description of the Related Art This type of battery pack is used by being connected to a charger in advance and charged, and then connected and loaded with various loads. In recent years, in particular, along with the widespread use of video cameras, mobile phones, etc., they have been used as a load in various electric machines and appliances.

[0003]

However, if the voltage drops below a predetermined level during use of a video camera, a mobile phone, etc., the video camera cannot be turned around, or a conversation occurs in the case of a mobile phone. May be cut off in the middle of. Normally, when the voltage drops below a specified value, a warning lamp is turned on or a warning sound is emitted to notify the timing of replacement with a spare battery pack or charging. Is not always in possession, and the power supply is not near the user,
You may not carry a charger. Especially video cameras and mobile phones are often used while out,
It is often the case that they cannot be used on the way.

The present invention has been made to solve the above-mentioned problems, and when the voltage of the secondary battery drops, even if a spare battery is not carried or is not connected to the charger. An object of the present invention is to provide a battery pack that can use a load for a predetermined time.

[0005]

In order to achieve the above object, the battery pack according to the present invention is a battery pack in which a charged secondary battery can be directly connected to a charger for charging. A generator, a small-capacity first capacitor charged by the operation of the manual generator, and a large-capacity capacitor charged when current is further supplied from the manual generator exceeding the capacity of the first capacitor. A second capacitor, and a circuit for supplying the current to the secondary battery when a current exceeding the capacity of the second capacitor is supplied from the manual generator, and operating the manual generator. When the voltage of the secondary battery drops during use of the load,
It is characterized by being provided with an emergency charging function capable of using the load for a predetermined time without connecting to a charger.

In order to achieve the above object, the battery pack of the present invention is a battery pack in which a secondary battery loaded can be directly connected to a charger for charging. A battery and a second secondary battery can be loaded, the first secondary battery is normally used, and when the voltage of the first secondary battery drops below a predetermined value, the second secondary battery is used. The feature is that the current can be supplied to the load by switching to the secondary battery.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail below with reference to the embodiments shown in the drawings. FIG. 1 is a circuit diagram showing a configuration of a battery pack according to an embodiment of the present invention.

Reference numeral 1 denotes a secondary battery, which is connected to a charger (not shown) through terminals 2 and 3 and charged. Further, the secondary battery 1 is connected to a load, for example, a mobile phone main body, via the first diode 4 and the terminal 5.

Reference numeral 6 is a manual generator. The manual generator may be any conventionally known one, for example, it has a small generator and a handwheel connected to the rotary shaft of the small generator via a gear. Or a combination of a one-way clutch and a belt instead of a handwheel, operating a knob attached to this belt to reciprocate the belt, and transmitting it to the rotary shaft of a small generator via a gear. Can be used.

A permanent magnet type synchronous generator 60 as shown in FIG. 3 is preferably used as the small generator. In this generator 60, two stators 61 and 62 are formed with different diameters, and each of the stators 61 and 62 has an inner peripheral surface of an adjacent stator 61 and an outer peripheral surface of another stator 62. They are arranged in a multiple structure so that a predetermined gap 63 is formed therebetween. Further, the rotor 64 is
The permanent magnets 64a and 64b fixed to the
And the air gaps 65, 66 between the permanent magnets 64a, 64b and the stators 61, 62, respectively.
Are arranged so that According to this generator 60, both surfaces of the permanent magnets 64a and 64b are used twice, and a large output can be obtained even with a small size.

The manual generator 6 is connected to the first capacitor 7 via a second diode 8. The first capacitor 7 is of a small capacity that can be charged instantly, and is preferably about 10 to about 50 μF. The terminal 7a of the first capacitor 7 is connected to the load via the third diode 9.

As the second capacitor 10, a capacitor having a larger capacity than the first capacitor 7, for example, an electric double layer capacitor having a capacity of about 1 to about 10 F is used. This second
The capacitor 10 has its terminal 10a connected to the terminal 7a of the first capacitor 7, which is connected to the second diode 8 described above, via the first high-sensitivity relay 11. The first high-sensitivity relay 11 has a contact 11a and an electromagnetic coil 11b. Contact 11a
Is connected to the terminal 7a of the first capacitor 7 and the connection 12 and to the terminal 10a of the second capacitor 10 and the connection 1
3 are connected to each other, and further, the terminal 7a
The electromagnetic coil 11b is connected to a connection wire 12 connecting the contact 11a and the contact 11a via a connection wire 14.

A first constant voltage diode 15 is connected to the connection 14, and the first transistor 1 is provided between the first constant voltage diode 15 and the electromagnetic coil 11b.
6 is interposed. That is, when the voltage of the first constant voltage diode 15 becomes equal to or higher than the reference voltage (usually 5 V), the electromagnetic coil 11 b passes through the first transistor 16.
A current flows through the contact 11a to turn it on. The terminal 10a of the second capacitor 10 is connected to the load via the fourth diode 17.

The terminals 10a, 10 of the second capacitor 10
b and the terminals 1a and 1b of the secondary battery 1 are connected by connecting wires 18 and 19, but a second high-sensitivity type having a contact 20a and an electromagnetic coil 20b having the same configuration as the above is provided between them. A relay 20, a second constant voltage diode 21, and a second transistor 22 are arranged.

The operation of the battery pack of this embodiment is as follows. First, the battery pack is loaded into the charger, that is, the terminals 2 and 3 are connected to the terminals of the charger, and the secondary battery 1 is charged for a predetermined time. After the charging is completed, the load is mounted, that is, the terminal 5 is connected to the connection terminal of the load to use the load. Since the current supplied from the secondary battery 1 is reverse biased to the third diode 9 and the fourth diode 17, and the contact 20a of the second high-sensitivity relay 20 is in the OFF state, these circuits operate. Instead, it is reliably supplied to the load via the first diode 4.

When the load voltage drops below a predetermined value during use, for example, in the case of a mobile phone, a warning sound is emitted. In the case of a mobile phone, since the call is cut off within a few seconds after the warning sound is emitted, the manual generator 6 is operated by hand to generate power immediately after the warning sound is emitted.

Since the first capacitor 7 has a small capacity,
Charging is completed instantly (usually about 0.1 seconds), and the current of the manual generator 6 is supplied to the load via the third diode 9. At this time, the voltage of the first capacitor 7 becomes higher than the voltage of the secondary battery 1 and the first diode 4 is reversely biased, so that all the energy of the manual generator 6 is supplied to the load. . When a large-capacity capacitor is used as the first capacitor 7, it takes a considerable amount of time to charge the capacitor to a constant voltage, and therefore, in the case of a mobile phone, it will be cut off in the middle, but the first embodiment of the present invention will be described. Since the capacitor 7 has a small capacity as described above, it is instantly charged.
Therefore, when the power supply source to the load is switched to the manual generator 6, the use of the load is not interrupted.

When the user further operates the manual generator 6 to generate electric power and the voltage exceeds the reference voltage, for example, 5 V or more, the first
A current flows through the constant voltage diode 15 of FIG. 1 and the electromagnetic coil 11b of the first high-sensitivity relay 11 is energized via the first transistor 16. As a result, the contact 11a comes into contact, the first high-sensitivity relay 11 is turned on, and the second capacitor 10 is charged. Since the second capacitor 10 has a large capacity as described above, it takes about 50 minutes to complete charging.
~ It takes about 100 seconds. Then, the current from the manual generator 6 is supplied to the load via the fourth diode 17. Since the second capacitor 10 has a large capacity, when it is fully charged, it is possible to continue using the load for a while even if the operation of the manual generator 6 is stopped.

Usually, the user completes a conversation in a hurry after the warning sound is emitted, so the call is completed at this level.
When the user further operates the manual generator 6 to generate power, unless the second capacitor 10 and the secondary battery 1 are connected, the first capacitor 7 and the second capacitor 1
Destroy 0. In this embodiment, the second capacitor 10 and the secondary battery 1 are the second high-sensitivity relay 20 and the second high-sensitivity relay 20.
Since it is connected via the constant voltage diode 21 and the second transistor 22 of the
A current flows through the constant voltage diode 21 and the second transistor 22 to energize the electromagnetic coil 20b to bring the contact 20a into contact, and the second high-sensitivity relay 20 is turned on. Therefore, the manual battery 6 directly charges the secondary battery 1. Since it takes 1 hour or more to saturate the secondary battery 1, it is impossible to continue operating the manual generator 6 during that time, and the necessity is poor.
Thereby, the destruction of the capacitors 7 and 10 can be prevented.

FIG. 2 is a circuit diagram showing the configuration of another embodiment of the battery pack of the present invention. The battery pack of this embodiment is the first
And the second two secondary batteries 30 and 31. Three
2 and 33 are terminals for connecting a charger, and 34 and 35 are terminals for connecting to a load. Reference numeral 36 denotes a changeover switch, which is configured to be able to come into contact with the first and second contact points 37 and 38 by switching. The one terminal 32 for connecting the charger is connected to the first contact 37 by the connection 40 via the first diode 39, and is connected to the second contact 38 by the connection 42 via the second diode 41. It is connected.

In the first secondary battery 30, one first secondary battery terminal 30a is connected to the connection wire 40, and the other first secondary battery terminal 30b is connected to the other charger. Is connected to a connection wire 44 provided between the terminal 33 and the other terminal 35 for connecting a load to form a circuit. The second secondary battery 31 has one second secondary battery terminal 31 a connected to the connection wire 42 and the other second secondary battery terminal 31 b.
Are connected to the connection line 44 to form a circuit. 4
5 is a connection 4 on the output side of the changeover switch 36, that is, on the side of the load connection terminals 34 and 35, which connects the changeover switch 36 and one of the load connection terminals 34.
6 is a capacitor connected between the switch 6 and the switch 6, and prevents voltage fluctuation when the changeover switch 36 is changed over.

According to the electromagnetic pack of this embodiment, first, the battery pack is loaded into the charger before use, that is, the terminals 32 and 33 for connecting the charger are connected to the charger terminals, and the first and second chargers are connected. Both the secondary batteries 30 and 31 are charged. When in use, load it into a load such as a mobile phone, that is, load connection terminal 3
Connect 4,35 to the load for use. Normally, the changeover switch 36 is brought into contact with the first contact 37, and the first secondary battery 30, which is the main battery, is used. When the voltage of the first secondary battery 30 drops and a warning sound or the like is emitted from the load, the changeover switch 36 is manually changed over to bring it into contact with the second contact 38 so that the second secondary battery, which is an emergency battery, is contacted. The secondary battery 31 is used. As a result, it is possible to prevent the call from being cut off midway while using the load, for example, while using the mobile phone. The changeover switch 36 is changed as follows.
Although it may be manually performed as described above, it goes without saying that the configuration may be such that it is automatically switched in accordance with a generation signal such as a warning sound.

[0023]

According to the battery pack of the present invention, since it has the manual generator and the first and second capacitors charged by the manual generator, when the voltage of the secondary battery drops,
Further, the load can be used for a predetermined time without carrying a spare battery or connecting the battery to a charger. Moreover, since the first capacitor has a small capacity, it is instantly charged and the use of the load is not interrupted.
Further, in the configuration including two secondary batteries, by using one as an emergency battery, even if the voltage of the other secondary battery used as the main battery drops, the load is continuously used in the same manner. It is possible to

[Brief description of drawings]

FIG. 1 is a circuit diagram showing an embodiment of a battery pack according to the present invention.

FIG. 2 is a circuit diagram showing another embodiment of the battery pack according to the present invention.

FIG. 3 is a cross-sectional view showing an example of a small generator that constitutes a manual generator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Secondary battery 4 1st diode 6 Manual generator 7 1st capacitor 8 2nd diode 9 3rd diode 10 2nd capacitor 11 1st highly sensitive type relay 15 1st constant voltage diode 16 1st 1 transistor 20 2nd high-sensitivity type relay 21 2nd constant voltage diode 22 2nd transistor 30 1st secondary battery 31 2nd secondary battery 36 Changeover switch 39 1st diode 41 2nd diode 45 condenser

Claims (4)

[Claims] 1. A battery pack in which a charged secondary battery can be connected to a charger as it is for charging, and a manual generator and a small-capacity battery charged by the operation of the manual generator. A first capacitor, a large-capacity second capacitor that is charged when the current exceeds the capacity of the first capacitor and is supplied from the manual generator, and a current that exceeds the capacity of the second capacitor. When a load is supplied from a manual generator, the secondary battery is provided with a circuit to which the current is supplied, and by operating the manual generator, when the voltage of the secondary battery drops during use of the load. , A battery pack having an emergency charging function that can use the load for a predetermined time without connecting to a charger. 2. The capacitance of the first capacitor is approximately 10 to 10.
The battery pack according to claim 1, which has a capacity of 50 μF. 3. The capacity of the second capacitor is about 1 to 1.
The battery pack according to claim 1, which is 0F. 4. A battery pack capable of charging a rechargeable secondary battery by directly connecting it to a charger, wherein the first rechargeable battery and the second rechargeable battery can be loaded. , Normally, the first secondary battery is used, and when the voltage of the first secondary battery drops below a predetermined value, it is switched to the second secondary battery to supply current to the load. A battery pack that makes it possible.