JPS6395821A - Battery charger - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a battery charging device, and is useful, for example, as a battery charging device for charging a battery mounted on an automobile.

[Conventional technology]

In recent years, as the number of electrical components mounted has increased rapidly, the voltage used has increased rapidly, making battery voltage drop more likely. Conventionally, when this battery voltage drops, the starter is turned to start the engine using a battery from another vehicle. Furthermore, as another method, a battery charging device is known that charges a battery using a dry cell.

[Problem that the invention seeks to solve]

However, the method of using the battery of another vehicle is extremely difficult if the other vehicle is not present when the battery voltage drops. Furthermore, in a battery charging device using dry batteries, depending on the capacity of the battery, the charging device must be replaced with one that matches the capacity of the battery.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a battery charging device that can automatically determine the capacity of a battery and charge the battery.

[Means for solving problems]

In order to achieve the above object, the present invention provides a battery charging device for charging a plurality of batteries of different capacities, including a charging means connected to both ends of the battery for charging the battery, and a charging means connected to both ends of the battery for charging the battery. A capacity determination circuit that determines the capacity of the battery; a voltage selection means that is connected to both ends of the battery and selects a predetermined voltage according to the capacity of the battery by the capacity determination circuit; Adopt technical means to provide reporting means for reporting.

[Effect]

By the above means, the terminals of the battery charging device are connected to both terminals of the battery. Due to this connection, a capacity determination circuit in the battery charging device detects the capacity of the battery based on the voltage of the battery. The voltage selection circuit selects a predetermined voltage of the battery based on the battery capacity detected by the capacity determination circuit.

In this way, a charging circuit is created that matches the capacity of the panteri. Then, the battery is charged using charging means connected to both ends of the battery. Completion of charging can be confirmed by a reporting means that reports completion of charging of the battery when the voltage across the battery is equal to or higher than a predetermined voltage.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention shown in the drawings will be described. There are usually two types of vehicle batteries 1: 24V type and 12V type. A manual battery charging device 2 for charging the vehicle battery 1 is provided with a manual DC generator 4 connected to both ends of the battery 1 via connection terminals 3 . Further, a current backflow prevention diode 5, a capacity determination circuit 6, a voltage selection circuit 7, and a reporting means 8 are connected between the connection terminal 3 and the manual DC generator 4, respectively.

The current backflow prevention diode 5 has its cathode side connected to the positive electrode of the battery 1 and its anode side connected to the manual power generator 4 in order to prevent current backflow from the battery 1 to the manual power generator 4 . The capacity determination circuit 6 is a circuit for determining two types of battery capacity, and includes a first Zener diode 11, a resistor 12.
13, a transistor 14, and a diode 15.

The first Zener diode 11 has a Zener voltage of 16V.
The cathode side is connected to the positive electrode side of the battery 1, and the anode side is connected to the negative electrode side of the battery via the resistor 12 and the resistor I3. The Zener voltage is 16V because the battery's final discharge voltage is approximately 21V for a 24V battery.
The voltage is approximately 10.5V for a 2V battery, and can be set arbitrarily between these voltages, and in this embodiment, 16V is used. Further, the transistor I4 has a base connected between the resistors 12 and 130, a collector connected to the anode side of the diode 15, and an emitter connected to the negative electrode side of the battery.

The cathode side of the diode 15 is connected to the positive electrode side of the battery.

Next, the configuration of the voltage selection circuit 7 will be described. The voltage selection circuit 7 includes two types of Zener diodes 21 and 22 corresponding to predetermined voltages of 12V and 24V, and a relay 23. The cathodes of the second Zener diode 21 with a Zener voltage of 24 V and the third Zener diode 22 with a Zener voltage of 12 V are connected to the positive electrode side of the battery 1.

The relay 23 is composed of a 24V terminal 23a, a 12V terminal 23b, a 23V terminal 23c, and a JJJ terminal 23d. That is, the 24V terminal 23a is connected to the anode side of the second Zener diode, and the 12V terminal 23b is connected to the anode side of the third Zener diode. The coil 23C is connected to both ends of the diode 15 of the capacitance determination circuit. The movable element 23d normally contacts the 12V terminal 23b, and the movable element 23d contacts the 24V terminal 23a only when current flows through the coil 23c and magnetism is generated.

Finally, a light emitting diode 8 serving as a reporting means has one end connected to the movable element 23d and the other end connected to the negative electrode side of the battery l via a resistor 9.

Next, the operation of the present invention will be described in the case where a battery whose capacity is unknown, whether it is 12V or 24V, is charged.

The connection terminal 3 of the manual battery charging device 2 is connected to the terminal of the battery 1. If the battery is a 24V battery 1, the final discharge voltage of the 24V battery 1 is approximately 21V.
Since the voltage is V, a voltage of about 21 V is applied to the voltage determination circuit 6 of the manual battery charging device 2. Therefore, current flows from the battery 1 to the first Zener diode 11 with a Zener voltage of 16V in the voltage discrimination circuit 6. In other words, voltage is applied to the base of transistor 140, turning on transistor 14. Therefore, a current flows from the battery l to the coil 23c in the relay 23, causing magnetism. Due to this magnetism, the movable element 23d comes into contact with the 24V terminal 23a, and a closed circuit consisting of the second Zener diode 21, the light emitting diode 24, and the battery 1 is formed. When the manual DC generator 4 is rotated, an electromotive force is generated at the output terminal of the generator 4, and a current is charged to the 24V battery 1 via the reverse current blocking diode 5 and the connection terminal 3. Here, after the manual DC generator 4 generates a predetermined amount of electricity and charges the battery 1, the manual DC generator 4
and check the light emitting diode 24. If the terminal voltage of the battery 1 is the zener voltage of the third zener diode 21 (24■ in the embodiment) and the zener voltage of the light emitting diode 2
The light emitting diode 24 emits light if the voltage is equal to or higher than the sum of the voltage drop of 4 (approximately 2.IV). By the light emitted from the light emitting diode 24, the operator of the manual generator 4 can confirm whether or not the battery pack 1 is charged. What to note here is that the light emitting diode 24 is 1i1 without rotating the manual generator 4! This is something you should do. This is because the charging voltage of the battery 1 exceeds the charging completion detection voltage due to the rotation speed of the generator 4.

When the battery 1 is a 12V battery 1, the final voltage of the 12V battery I is about 10.5V, so no current flows through the first Zener diode 11 in the capacity determination circuit 6. That is, the transistor 14 is turned off, the mover 23d in the relay 23 comes into contact with the 12V terminal, and a closed circuit consisting of the battery 1, the third Zener diode 22, and the light emitting diode 24 is formed. The subsequent charging operation is similar to that described above.

In the above embodiment, the Zener voltages of the Zener diodes 21 and 22 are 12V and 24V, respectively, but any voltage that rotates the vehicle scooter, that is, starts the vehicle engine, may be used, so it may be 10V or 20V, respectively. good.

Furthermore, it is clear that the manual DC generator 4 may be a foot-operated generator, or may be an alternating current generator by adding a diode rectifier circuit.

As a charging means, in addition to a manual DC generator, a charging method using dry batteries is also sufficient.

In this embodiment, a light emitting diode is used as the reporting means, but a buzzer or the like may also be used.

In the above embodiment, the light emitting diode 8 was used as a charging completion reporting means. However, as mentioned above, the light emitting diode 8 also emits light by the manual generator 4. Using this, the operator of the manual DC generator 4 can, during charging work,
If the light emitting diode 8 is emitting light, the battery 1 has
You can confirm that it is being charged with sufficient voltage.

〔Effect of the invention〕

As described above, according to the present invention, the following effects can be obtained. In other words, by the functions of the capacity determination circuit and the voltage selection circuit, a battery of unknown capacity can be charged with a predetermined voltage according to the capacity of the battery, and
An excellent effect is obtained in that charging completion can be confirmed by the reporting means.

[Brief explanation of the drawing]

The figure is an electrical circuit diagram showing an embodiment of the battery charging device of the present invention. 1...Battery, 2...Battery charging device, 4...
・Manual DC generator serving as charging means, 6... Capacity discrimination circuit, 7... Voltage selection circuit, 8... Light emitting diode serving as reporting means, 11... First Zener diode (
16■ Zener voltage), 14...transistor, 21
...Second Zener diode, 22...Third Zener diode, 23...Relay.

Claims (1)

[Claims] A battery charging device for charging a plurality of batteries of different capacities, comprising: a charging means connected to both ends of the battery for charging the battery; and a charging means connected to both ends of the battery, the a capacity determination circuit that determines the capacity of the battery; a voltage selection circuit that is connected to both ends of the battery and selects a predetermined voltage according to the capacity of the battery by the capacity determination circuit; A battery charging device comprising: reporting means for reporting completion of battery charging.