JPS5932327A - Solar battery utilizing power source - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power supply device using solar cells, and an object of the present invention is to use solar cells to effectively utilize solar cell output without generating zero power during output adjustment. Its purpose is to provide power supplies.

Conventionally, this type of power supply using solar cells has been constructed as shown in Figure 1, in which the output of a solar cell (1) is connected in series with storage batteries (4a) and (4b) via a backflow blocking diode (2). The output is adjusted by applying the voltage across the storage battery block (3) to the load (7) via the variable inheatance element 1101 for adjusting the output. Ta. However, in such a conventional example, when adjusting the output by increasing the inheatance element (lO) and reducing the power supplied to the load (7), the power by the inheater sisistor (10) is 0.
There was a problem in that the output of the solar cell f41 could not be used effectively due to the increase in space. The operation will be explained in detail below with reference to 1. and FIG. Figure 2 (a) shows the operating characteristics when the solar radiation is relatively low, and Figure 2 (b) shows the operating characteristics when the solar radiation is small. −r curve,
(0 is the load characteristic curve of [storage battery block (3) 10 diodes (2) 10 loads (7)], 09 is the load line line when the load (7) is the resistance and the resistance value of the ishipetance element (lO) is 0. ,・ is the ishi heater sis element (lO) and the load (
Now, which is the load line when the resistance values of 7) are made equal,
The operating point of the solar cell (il) when the amount of solar radiation is large is shown in Figure 2 (
The operating point at 100% output when the resistance value of the in-heater system cable (1411) is 0 is the intersection P of the song 4111 (-0 and (00) in a), and the operating point at 100% output is the 1u line 09 in the same figure and V = Va (storage battery)
It is the intersection point Q with the center of the voltage across the voltage across the voltage across the voltage across the voltage across the voltage across the voltage across the voltage across the voltage across the voltage across the voltage across the voltage across the voltage across the voltage across the voltage across the voltage at both ends of the voltage at both ends of the voltage at both ends of the voltage at both ends of the voltage at both ends of the voltage at both ends of the voltage at both ends. Straight line in the diagram
and the straight line (19) of V=VB, which is the intersection point S. In the figure, part A is the power supplied to the load (7), part B is the power loss due to the in-heater system cable (101), and part C is the power loss due to the in-heater system cable (101). This is the charging force for the storage battery block (a).On the other hand, the operating point ii of the solar cell (1) when the amount of solar radiation is small is shown in Fig. 2 (b).
curve (-0 and - intersect P'; in this case, the output of the solar cell (1) alone is insufficient to supply power to the load (7), so the shortfall is compensated for by discharging from the storage battery block (3). Cover. In the figure, part D is the storage battery ``j lock (
3).

By the way, when the output is adjusted by changing the resistance value 4r of the in-heater system cable (lO) in this way, power loss occurs due to the in-heater system cable (In), and the output of the solar cell f+ cannot be used effectively. On top of that, there is the problem of heat generation due to this power loss, and furthermore, there is a problem of heat generation due to this power loss.
There was a problem in that the amount of discharge from the plug (8) increased by the power loss due to the in-heater system cable (10), and the amount of discharge became more than necessary. The present invention has been made in view of the above points.

Examples will be described below using figures. Figure 8 shows all the embodiments of the present invention.
consists of a storage battery (4a x 4b) and an output adjustment circuit (5) consisting of a changeover switch (6a) (6b) that allows each storage battery (4ax4b) to be freely connected in series and parallel. ) to side a, the storage battery (
4a and 4b are connected in series and are in a 100% output state, and when switched to the b side, storage batteries (4a and 4b) are connected in parallel and are in a 25% output state. However, the changeover switches (6a) and (6b) are switched in conjunction.

The operation of the embodiment will be explained below using FIG. 4.

Figure 4 (a) shows the characteristics when the amount of solar radiation is relatively low, and Figure 4 (b) shows the characteristics when the amount of solar radiation is small.
- is the same characteristic curve as in Fig. 2, and (11)' is the characteristic curve of [storage battery block (3) 10-tie autograph 2) + load (7)] when storage batteries (4a) and (4b) are connected in parallel. This is the load curve.

Now, when solar radiation 1 is a dog, changeover switch (6a) (6
When switching b) to side a and connecting solar cells (4a x 4b) in series to obtain 100 outputs, the operating point of solar cell (1) will be as shown in (a) and (c) in Figure 4 (a). Intersection P, load (7)
The operating point is also the intersection Q between (Ji and (Ji) in the same figure, and the operation is exactly the same as the conventional example.
a) Switch (6b) to side b and connect storage battery (4a) (41)
) are connected in parallel to make 25 outputs, the sun [pond (1
) is the intersection point P' of (a) and bγ in the same figure, and the operating point of the load (7) is the intersection point S of 09 and the straight line (free time') of V=-i-Vn in the same figure. At this time, part A in the figure is the power supplied to the load (7), and part B is the charging power, so there is no power loss like in the conventional example, and the output from the solar 1 and the pond (1) is effective. - When the power and solar radiation are small, the operating point of the solar cell (1) is at the intersection P' of the edges J and d in Figure 4 (b), 25%. Load at output (7
The operating point of ) is the intersection S of (b) and (19') in the figure.

In the figure, part C is the amount of discharge from the storage battery P0·ν (3). In this case, the amount of this release is the conventional example (Fig. 2 (b))
Compared to this, the power is reduced by 0 s due to the in-heater system cable (101).

Figure 5 shows another embodiment, in which six storage batteries (4a
) ” (4f) and 5-switch switch (6a) ”
The output adjustment circuit (5) consisting of (6e) and the storage battery "j
It consists of an Otsuk (3) and a selector switch (6).
When switching a) to (6e) to the roe contact side, the storage battery (8
a) (8c) (3d) are connected in series, and the storage battery (4bX4eX4f) is also connected in series, and both the storage batteries (4aX4cX4d) and (4bX4eX4f) are connected in series.
are now connected in parallel, while the switch
When Sochi (6a) to (6e) are switched to the white marked contact side, the storage batteries (4a) (4b) are connected in series, and the storage batteries (4a) (4b), (4CX4d), (4eX) connected in series are connected in series.
4f) are connected in parallel. Therefore, the output adjustment circuit (5) outputs 100,
2/8 output can be switched freely. Note that the number of storage batteries and the method of connecting them in series and parallel are arbitrary, and output adjustment can be easily made more finely.

Fig. 6 t'' shows yet another embodiment, in which a plurality of solar cells (
It is equipped with a solar cell block (9) consisting of a changeover switch (8a) (8b) for switching the connection of the solar cells (la) (lb) and a changeover switch (8a) (8b) for switching the connection of the solar cells (la) (lb). Switch 8aX8b) to the a side and connect the solar cells (la) (lb) in series, and when adjusting the output, switch the switching switch (8a) (8b) to the b side and connect the solar cells (xaXlb) in parallel. That's how it is.

FIG. 7 is a diagram showing the operating characteristics of the embodiment shown in FIG.
) 8 are connected in series and the operation when outputting 100 yen is as follows.
*1!4', It is exactly the same as the example, and the operating point of the solar pond block (9) is the intersection P of the curve Al11 (-1') and Cυ in the same figure, and the operating point of the load (7) is the same. Lines 09 and (19) in the figure
The intersection point Q is the intersection point Q. On the other hand, the V-I curve of the solar cell block (8) when the solar cells (la) (lb) and storage batteries (4a) (4b) are connected in parallel at 25 channels is (
[Solar cell block (9) ten diodes (
2) Load curve (7)] is the load curve Viu, so the operating point of the solar cell block (υ) is the intersection point P' of the vertical and W curves in the figure, and the operating point of the load (7) is the curve Viu in the figure. Straight line 09 and (tl
' is the intersection point S. Here, part A in the figure is the electric power supplied to the load (7), part 8 is the charging power to the storage battery block (3), and the part A is the power supplied to the storage battery block (3).
There is no generation of zero power due to O), and the output of the solar cell block (9) is effectively utilized.

As described above, the present invention provides a power supply device using multiple solar cells, which is configured so that the output of the solar cell is applied to the storage battery block through a small ion for backflow prevention, and the voltage across the storage battery block is applied to the load. A storage battery block is made up of several storage batteries and an output adjustment circuit such as a changeover switch that allows each storage battery to be freely connected in series and parallel, and the output can be adjusted by changing the connection of the storage batteries. , unlike the conventional example, there is no power generation due to the in-heater system element, and there is an advantage that the solar cell output can be used effectively.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram of a conventional example, FIGS. 2(a) and 2(b) are operating characteristic diagrams of the same as above, FIG.
Figures (a) and (b) are operational characteristics diagrams of the same Vi1 unit, Figure 5 is a circuit diagram of another embodiment, Figure 6 is a circuit diagram of another embodiment, and Figure 7 is a circuit diagram of the same unit. FIG. f+) is a solar cell, (2) is a diode, (3) is a solar cell plug, (4a) ” (4f) is 1!; 1
1t, f51 is an output adjustment circuit, and (7) is a load. Agent Patent Attorney Ishi 1) Choshichi (9) 137

Claims (1)

[Claims] (1) In a solar battery power supply device that applies a solar battery output to a storage battery block via a backflow blocking diode, and applies voltage across the storage battery Pro-Shif to a load, a plurality of storage batteries and each A power supply device using solar cells that forms a storage battery block with an output adjustment circuit consisting of a changeover switch that allows storage batteries to be freely connected in series and parallel.