JPS6242546Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an improvement of a power supply device in which a solar cell module is configured by a solar cell panel containing a large number of solar cells, thereby supplying power to a required load. .

Conventionally, this type of device has been used as shown in Fig. 1, which uses a solar cell module 1 that generates electromotive force by receiving sunlight.
The output from the solar cell module 1 charges the battery 3 through the input side switching element 2 as shown in FIG. The output from the solar cell module 1 is thus configured to be consumed for charging the battery 3 and for the load L.

If the battery 3 has now reached a fully charged state due to the charging current i, the overcharge prevention circuit section 7 connected to it will detect this and turn off the input side switching element 2. The controller 4 connected to the circuit section 7 connects the output side switching element 9, which is connected to the main path 8 parallel to the branch path 6 and is connected to the load side of the connection point of the battery 3.
By turning on the main switching element 5 and turning off the main switching element 5, the state shown in FIG.
In this way, the output from the solar cell module 1 is not consumed at all, and power is supplied to the load L only from the fully charged battery 3 via the output-side switching element 9.

As described above, when using the conventional device, even if sufficient output is obtained from the solar cell module 1 during the daytime, once the battery 3 is fully charged, the load L is only supplied from the battery 3. The solar cells that are being transmitted with electricity and being irradiated with sunlight are left in a state where their electromotive force is not utilized, and as a power supply device that uses sunlight, it is necessary to be satisfied in terms of effective use of the sunlight. It has not become a kimono.

In view of the above points, the present invention improves the output from the solar cell module by appropriately adding switching elements on the input side and output side to various components of the solar cell module, battery, overcharge prevention circuit, and controller. , so that it can be constantly supplied to the load,
By suppressing the supply of output from the battery to the load, and when the output from the module is no longer available, output can be supplied from the fully charged battery, allowing the constant supply of power to the load without the power being depleted. The purpose is to ensure that

The present invention will be described in detail with reference to the embodiment shown in FIG.
Even in the same figure, the same members are indicated by the same symbols as in FIG. 1, and include a solar cell module 1, a battery 3, an overcharge prevention circuit 7 connected to the battery 3, and a controller 4. are the same as those in FIG. 1, and in the present invention, the input side switching element 10 and the output side switching element 1 are formed by a manual changeover switch, an electronic switch, etc. as shown in the figure.
1 is added in the following configuration.

That is, the output side of the solar cell module 1 is connected to the movable contact 101 of the input side switching element 10, the movable contact ₁₁₁ of the output side switching element ₁₁ is connected to the load L, and each of the switching elements 10 and 11 The first fixed contacts 10 ₂ and 11 ₂ are connected to the dedicated power supply line 1
2, and the respective second fixed contacts 10 ₃ and 11 ₃ are connected by a charging and power supply line 13, and the battery 3 is connected to the line 13, and of course both switching elements are connected to each other. 1
0, 11 are the respective movable contacts 10 ₁ , 11 ₁ ,
First fixed contacts 10 ₂ , 11 ₂ and second fixed contacts 10
₃ , 11, and ₃ .

The switching operation of the movable contacts 10 ₁ and 11 ₁ is controlled by the controller 4 and the overcharge prevention circuit 7 connected thereto as follows.

When the solar cell module 1 receives sunlight and generates an electromotive force and the battery 3 is not fully charged, the movable contacts 10 ₁ and 11 ₁ are connected to each other as shown in FIG. Second fixed contact 10
₃ and 11 ₃ side, therefore, the output from the same module 1 is 10 ₁ , -10 ₃ -
At the same time, it is consumed to charge the battery 3 through the path of the charging power supply line 13-battery 3, and at the same time, 10 ₁ -10 ₃ -13-11 ₃ -11 ₁ -
The power is also consumed as power supplied to the load L via the path L.

Next, when the above-mentioned state A continues and the battery 3 reaches the charging completion state, the overcharge prevention circuit section 7 connected thereto detects the completion state and closes the movable contact ₁₀₁ as shown in FIG. As shown in (b), the controller 4 connected to the circuit section ₇ switches the movable contact ₁₁₁ to the second fixed contact ₁₁₂ side, and thus the charging current to the battery 3 runs out, power is also cut off from the battery 3 to the load, and instead the output of the solar cell module 1 is all 1-10 ₁ -10 ₂ -12-11 ₂ -11 ₁ -L.
It will be supplied to the load via this route.

As is known, when the solar cell module 1 does not receive sunlight at night or the like and its output becomes zero, a timer, a light receiving element, etc. provided in the controller 4 are used to switch between the two switching elements 10 and 1.
3-1 at night etc. by switching and operating 1 to be able to convert from state B to state A.
Power is supplied from the battery 3 to the load L through the path 3-11 ₃ -11 ₁ -L.

The present invention, as embodied by the above embodiments,
It comprises a solar cell module 1, a battery 3, an overcharge prevention circuit section 7 connected to the battery 3, a controller 4, an input side switching element 10, and an output side switching element 11, and each of the switching elements 10 and 11 is movable. The contacts 10 ₁ and 11 ₁ are connected to the output side of the solar cell module 1 and the load L, respectively, and a dedicated power supply line 12 is connected between the first fixed contacts 10 ₂ and 11 ₂ of both the switching elements 10 and 11. According to the second
Between the fixed contacts 10 ₃ and 11 ₃ is the charging/power feeding line 13
and connect the battery 3 to the charging/power feeding line 13, and when the battery 3 is not fully charged, the input side and output side switching elements 10, 1 are connected to each other.
When the movable contacts 10 ₁ , 11 ₁ of 1 are in the connected state by the charging/power feeding line 13 and the charging of the battery 3 is completed, the overcharge prevention circuit 7 detects this and switches the input side. The output side switching element 11 is actuated by the controller 4 connected to the element 10 and the circuit section 7, and both switching elements 1
Since each of the movable contacts 10 ₁ and 11 ₁ of 0 and 11 can be freely switched to the connection state by the dedicated power supply line 12,
In the conventional example, when the battery 3 completes charging, the charging current disappears, and the battery 3 supplies power to the load, and the output of the battery 3 is consumed while the output of the solar cell module 1 is not consumed. On the other hand, in the present invention, when battery 3 is fully charged, charging to battery 3 and power supply from battery 3 to load L are stopped, and load L is covered by the output of module 1. The energy generated by the solar cell module 1, which receives sufficient sunlight, is not used effectively, but the charging energy of the battery 3 is inappropriately consumed during the day, and the power supply to the load at night is interrupted. This will make it easier to provide highly reliable power supplies that can transmit power 24 hours a day, without any traces remaining.

[Brief explanation of the drawing]

Fig. 1 shows a conventional power supply device using a solar cell module, A is an electric circuit explanatory diagram showing the current in an incomplete charging state, B is an electric circuit diagram showing current in a fully charged state, and Fig. 2 shows a power supply device according to the present invention. is not fully charged,
B is an explanatory diagram of an electric circuit showing current in a charging completed state. DESCRIPTION OF SYMBOLS 1... Solar cell module, 3... Battery, 4... Controller, 7... Overcharge prevention circuit section, 10... Input side switching element, 10 ₁ ... Movable contact, 10 ₂ ... First fixed contact, 10 ₃ ...Second
Fixed contact, 11... Output side switching element, 11 ₁ ...
Movable contact, 11 ₂ ...First fixed contact, 11 ₃ ...
2nd fixed contact, 12... dedicated power supply line, 13... charging/power supply line, L... load.

Claims (1)

[Scope of utility model registration request] It is equipped with a solar cell module, a battery, an overcharge prevention circuit connected to the battery, a controller, an input side switching element, and an output side switching element, and each movable contact of both switching elements is connected to the output side of the solar cell module. and the load, and the first fixed contacts of both switching elements are connected by a dedicated power supply line, and the second fixed contacts are connected by a line used for charging and power supply, respectively, and the battery is connected to the line for charging and power supply. When connected and the battery is not fully charged, each movable contact of the input side and output side switching element will
When the battery is connected to the charging power supply line and the battery is fully charged, the overcharge prevention circuit detects this and switches the input side switching element, and the controller connected to the circuit switches the output side switching element. A power supply device using a solar cell module that is activated so that each movable contact of both switching elements can be switched to a connection state using a dedicated power supply line.