JPS63206167A - Power-supply device - Google Patents

Abstract

PURPOSE:To prevent the short-circuiting accident of a battery from being generated, by connecting a +/- counter-connecting-proof circuit between a power- supply circuit and a pair of pole plates. CONSTITUTION:On the upper section of the housing interior of a power-supply device main-unit 1, an inverter circuit(power circuit)2 converting DC input to AC output is set, and on the lower section, a battery 3 is removably fitted. Then, between the inverter circuit 2 and pole plates 4(battery-connecting terminals), a counter-connecting-proof circuit 8 consisting of a diode bridge and the like is set, and is contrived to be normally worked even if the poles +/- of the battery 3 are counterconnected to. As a result, without using cables and the like, the battery can be fitted on the device main-unit regardless of the polarity.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention uses a battery such as a car battery as a power source, and uses an inverter circuit that outputs alternating current (AC) or a step-up transformer to step up the voltage and output direct current (DC). The present invention relates to a power supply device including a power supply circuit such as a circuit.

(Prior Art) A conventional power supply device equipped with an inverter circuit connects a power supply main body 101 to a car battery 102, as shown in FIG.
Take it to the place where you want to use it, and connect the car battery terminal 104, 104 of the device main body 101 to the car battery 102 using a cord 103° 103 like a booster cable.
Connect AC100v output terminal 105i: AC100
The V device 106 was connected and used. However, since it is used in this way, the capacity of the car battery 102 is wasted due to the line resistance of the cord 103 at the same time as the trouble of connecting the cord 103, and the output of the car battery 102 is short-circuited by the cord 103. There was a possibility that it would. Also, +.

– may be connected in reverse; in this case, the power supply unit 1
In some cases, fuses prepared for 01 were blown and became unusable.

In addition, as a means to prevent reverse connection of the battery, it is also possible to adopt a mechanical structure to prevent reverse connection, such as changing the shape of the + and - polar plates or forming protrusions to prevent reverse connection. However, with this type of means, there is a problem in that when the device body and the battery are installed in opposite directions, it is necessary to reinstall them in the opposite directions each time.

In addition, in FIG. 12, 107 is a power switch;
8 is a pilot lamp, and 109 is a breaker.

(Object of the Invention) In view of the above points, the present invention is a power source that enables connection with a battery without using cords such as a booster cable, and that operates normally even if the battery is connected in reverse by incorrect polarity. The purpose is to provide equipment.

(Structure of the Invention) The present invention is a power supply device in which a power supply circuit is housed inside a main body, and a pair of electrode plates are exposed outside the main body and are connected in contact with terminals of a battery attached to the main body. A + and - reverse connection prevention circuit is connected between the power supply circuit and the pair of electrode plates.

With this configuration, the battery can be attached to the device main body regardless of its polarity without using cables or the like.

(Example) A first embodiment of the present invention will be described with reference to FIGS. 1 to 6.

An inverter circuit (power supply circuit) 2 for converting DC input to AC output is arranged inside the housing of the power supply main body 1, and the lower part is hollow so that a battery 3 can be detachably installed. There is. A pair of electrode plates 4, which are exposed to the outside at a portion corresponding to the top plate of the cavity, are placed in contact with the pole posts 3a (terminals) of the car battery 3 installed.
4 is installed.

The maximum external dimensions of car batteries are determined by the JIS standard, and the size and position of the poles do not differ much among batteries with the same standard product number. Therefore, if the inner diameter of the battery attachment part of the main body 1 and the area of the electrode plate 4 are set to the maximum dimensions of JIS to accommodate the variation in the dimensions between the pair of battery terminals, the main body 1 can be used as a battery as shown in the figure. When the battery 3 is placed on top of the battery 3, the pole post 3a of the battery 3 comes into contact with the pole plate 4 and is electrically connected.

As a result, as shown in Figure 5, A
When the C100V device 6 is connected and the power switch 7 is turned on, the AC100V device 6 becomes usable.

In the present invention, as shown in FIG. 6, a reverse connection prevention circuit 8 made of a diode bridge or the like is provided between the inverter circuit 2 and the plate 4, that is, the terminal for disconnection connection, and thereby the battery 3 It will operate normally even if the + and - poles are connected in reverse.

Furthermore, since the main body can be connected to a battery as a power source without using cables, the connection work is easy, power loss is reduced, and battery short-circuit accidents can be prevented. In the figure, 9 is the inverter transformer of the inverter circuit 2, and 10 is the breaker that cuts off the circuit when an overcurrent flows. 111 and 12 are the reset terminal and pilot lamp of the breaker, respectively, which are arranged on the front of the main body 1. It is.

A second embodiment of the present invention will be described with reference to FIGS. 7 and 8.

In this embodiment, a battery holding belt 13 and a holding fitting 14 are provided at the bottom of the main body 1, and a handle 15 is provided at the top of the main body 1. With this configuration, the battery 3 is attached to the main body 1.
After attaching the battery 3 using the belt 13 and metal fittings 14,
The device can be easily carried by holding the handle 15 while holding the device.

A third embodiment of the present invention will be described with reference to FIGS. 9 to 11.

In this embodiment, in addition to the inverter circuit 2, a battery charging circuit 21 is provided as a power supply circuit inside the main body 1.
The battery 3 can also be charged by connecting to an AC power source, and a battery polarity detection circuit 22 is connected between the output side of the charging circuit 21 and the electrode plate 4, that is, the battery connection terminal. , the polarity of the connected battery 3 is detected and the polarity of the charging circuit 21 is automatically switched.

That is, the circuit is AC10 as shown in FIG.
A rectifying and smoothing circuit 24 with the 0V power supply terminal 23a as an input terminal, a charging circuit 21 with the output of this circuit 24 as an input, and the polarity circuit connected between the output of this circuit 21 and the electrode plate 4, that is, the battery connection terminal. It consists of a detection circuit 22, a reverse connection prevention circuit 8 connected to a battery connection terminal, and an inverter circuit 2 connected to the output side of this circuit 8 and having an AC 100V output terminal 5.

A charging cord 23 for connecting to an AC 100v power source during charging is connected to the power supply terminal 23a, and this cord 23 is stored in a cord storage case 25 formed on the upper back of the main body 1 as shown in FIG. It will be stored. In addition,
In FIG. 9, 26 is a charging indicator lamp, and 27 is an AC 100V power source to which the cord 23 is connected during charging. Further, the electrode plate 4 is designed to serve as a power supply electrode plate for the inverter circuit 2 and a battery connection electrode plate for the charging circuit 21.

The operation of the battery polarity detection circuit 22 will be explained below. Now, a battery is connected to the electrode plate 4, and AClooV is applied to the power terminal 23a. Here, the battery is on plate 4 a
When connected with the polarity of + on the side (Fig. 11) and - on the b side, the relay RY1 is first activated by the rise of the power supply of the charging circuit 21, and its contacts are closed and the a side is positive, so the transistor The base current of Tr flows through resistor R, transistor Tr is turned on, and therefore relay RY
2 also operates, and therefore its contacts are switched so that the + side output of the filling circuit 21 and the a side of the electrode plate 4, and the − side output and the b side of the electrode plate 4.
The two sides are connected, the mutual polarity is appropriate, and charging is performed.

Conversely, if the battery is connected with a - polarity on the a side of the polar plate 4 and a positive polarity on the b side, when the relay RYI operates and its contacts close, the base of the transistor Tr
Since a reverse voltage is applied between the emitters, the transistor Tr does not turn on and the relay RY2 does not operate. Therefore, the contacts are in the state shown in the figure, and the one side output of the charging circuit 21 is connected to the a side of the electrode plate 4, and the + side output is connected to the b side of the electrode plate 4, and in this case, the polarities are also appropriate for each other. Then charging is done.

Previously, connecting a battery with reversed polarity could destroy the charging circuit and required some kind of protection device, but with the provision of the battery polarity detection circuit 22, such a protection device is no longer necessary. At the same time, there is no need to check the polarity before installing, making it easier to use.

Further, in this embodiment as well, as in the case described above, there is no need to connect cables, etc., so efficiency during charging is improved, control accuracy of charging voltage is improved, and short-circuit accidents do not occur when connecting cables.

Note that the present invention is not limited to the above-mentioned embodiments, and for example, a D
A booster circuit that boosts the C input and outputs the DC output can be similarly applied.

(Effects of the Invention) As described above, according to the present invention, when a battery is attached to a main body housing a power supply circuit, the terminals of the battery are connected to the electrode plates provided in the main body, and the battery is connected to the power supply circuit. Since the battery is connected to the main unit via a + and - reverse connection prevention circuit, it is possible to connect the battery to the power supply circuit of the main unit without using cables as in the conventional case, making the connection easy and preventing short circuits of the battery. Accidents can be prevented, and since there is no power loss due to cables, the battery capacity can be used effectively. Furthermore, accidents caused by incorrect battery polarity connections can be prevented, and since reverse connection prevention is implemented in the circuit, there is no need to reconnect or reinstall the battery even if the battery is connected in the opposite direction. play.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a power supply device according to a first embodiment of the present invention;
Figure 2 is a front perspective view of the device, Figure 3 is a rear perspective view of the device, Figure 4 is a perspective view of the main body of the device showing the state in which the battery is installed, Figure 5 is a perspective view of the device in use, and Figure 6 is an electric circuit diagram, FIG. 7 is a perspective view of a power supply device according to a second embodiment of the present invention, FIG. 8 is a perspective view showing a state in which a battery is attached to the main body of the device, and FIG. FIG. 10 is a sectional view of the power supply device according to the embodiment, FIG. 11 is an electric circuit diagram, and FIG. 12 is a perspective view showing the conventional power supply device in use. DESCRIPTION OF SYMBOLS 1... Power supply main body, 2... Inverter circuit (power supply circuit), 3... Battery, 4... Pole plate, 8... Reverse connection prevention circuit, 21... Battery charging circuit, 22・・・
・Polarity detection circuit. Patent applicant Matsushita Electric Works Co., Ltd. Agent
Patent Attorney Etsushi Kotani Patent Attorney Chief 1) Masayuki Patent Attorney Yasuo Itaya Figure 1 Figure 2 Figure 4 Figure 5 Figure 7 Figure 1b Figure 8 Figure IJ J Figure 9 Figure 10

Claims (1)

[Claims] 1. A power supply device that houses a power supply circuit inside the main body and has a pair of electrode plates exposed outside the main body that are connected to the terminals of a battery attached to the main body. . A power supply device, characterized in that + and - reverse connection prevention circuits are connected between the power supply circuit and the pair of electrode plates. 2. The power supply device according to claim 1, wherein the power supply circuit includes an inverter circuit that converts DC input to AC output. 3. The power supply device according to claim 1 or 2, wherein the area of the pair of electrode plates is adapted to accommodate variations in dimensions between the pair of terminals of the battery. 4. The power supply circuit includes an inverter circuit and a battery charging circuit, and the power supply plate of the inverter circuit and the battery connection plate of the battery charging circuit are shared. The power supply device according to any of Item 3. 5. The power supply device according to claim 4, wherein a battery polarity detection circuit is connected to the battery charging circuit, and the battery charging circuit and the electrode plate are connected in accordance with the polarity.