JPS6361791B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical field to which the invention pertains] The present invention relates to a solar cell module in which a large number of solar cell elements are connected in series and output terminals are provided at both ends.

[Prior art and its problems]

Typical wiring examples of conventional solar cell modules are shown in simplified form in FIGS. 1 and 2. This is diameter 4
inch solar cell element 2 on the element mounting panel 1.
This is an example of a power module in which 30 modules are connected in series and terminals 3 and 3 are provided at both ends. A voltage is generated between the front and back surfaces of one element, and this is connected in series with the adjacent elements using two lead wires.
To make the diagram easier to understand, only the direction of the connection is shown here by a single line.

Wiring like this diagram is susceptible to electromagnetic induction. For example, in this figure, if there is a magnetic flux linkage perpendicular to the plane of the paper, an induced current will flow in the lead wire according to Faraday's law. Therefore, if this solar cell module is installed near electric wires through which a large current flows or a strong alternating magnetic field, an induced current will flow in addition to the current generated by light. Further, if the output terminals 3 are spaced apart from each other as shown in FIG. 1, when a lead wire is connected to the outside, a loop is formed by the lead wire, and an induced current flows there. These induced currents are superimposed on the output voltage, and when a solar cell module is used as a power source for measuring instruments, communication devices, etc., they are likely to cause malfunction or damage, and it is difficult to remove these superimposed currents.

[Purpose of the invention]

An object of the present invention is to provide a solar cell module that is less susceptible to electromagnetic induction and can provide stable output even at large currents and in the vicinity of strong magnetic fields.

[Key points of the invention]

In order to achieve the above object, the present invention forms a plurality of series circuits of solar cell elements into a plurality of loops, and furthermore, these loops are interconnected so that the voltages induced in each loop by an external magnetic field cancel each other out. It is characterized by connecting. Furthermore, it is also possible to further reduce the influence of external magnetic fields by arranging the terminals provided at both ends of the series circuit close to each other.

[Embodiments of the invention]

Examples of the invention are shown in FIGS. 3-6. Similarly to the above, in order to make the diagram easier to understand, the lead wires are omitted and only the direction of connection is shown with a single line. In FIGS. 3 to 5, the series circuits connecting the elements form two loops A and B having approximately the same area.
Moreover, these loops A and B are connected to each other so that the voltages induced in each of them due to intersecting external magnetic fields cancel each other out. Therefore, it is possible to obtain an output voltage that is not affected by an external magnetic field between the terminals 3, 3 at both ends, that is, to configure a non-inductive solar cell module. Needless to say, the intersections of the wirings as shown in FIGS. 3 and 4 should be insulated so that they do not come into contact with each other.

FIG. 6 shows yet another embodiment, in which a large number of small-area loops are formed and the loops are interconnected so that their induced voltages cancel each other out. When the area of each loop is small,
As in this embodiment, even without forming an even number of loops with the same area and connecting them so that the induced voltages cancel each other out, the induced voltage generated between the terminals 3 and 3 can be suppressed to a sufficiently low level. It is possible to achieve the objectives of the term. In the embodiment shown in FIG. 7 as well, a series circuit of elements 1 forms a large number of small-area loops, which are connected in anti-series to substantially prevent induction by external magnetic fields.

In the embodiments of FIGS. 3-7, the terminals 3, 3 are
They are provided close to each other on the panel 1. In this way, the eighth section, which is a side view of the module,
As is clear from the figure, the area of the loop C formed by the external leads 82 connected to the terminals 3, 3 is significantly reduced, and induction by external magnetic fields in the plane direction of the module 81 can be reduced.

The present invention is naturally applicable to a module in which elements on a panel are connected in series and parallel. In this case, the series circuits of parallel elements may form a plurality of loops, or the circuits of series elements each forming a plurality of loops may be connected in parallel.

〔Effect of the invention〕

According to this invention, by considering the connection order of the solar cell elements, it is possible to reduce the influence of external electromagnetic induction, and stable output can be obtained even in the vicinity of large currents and strong magnetic fields.

[Brief explanation of drawings]

1 and 2 are plan views showing examples of wiring of a conventional solar cell module, FIGS. 3 to 7 are plan views showing examples of wiring of a solar cell module embodying the present invention, and FIG. 8 is a plan view showing an example of wiring of a solar cell module according to the present invention. 1 is a side view of a solar cell module according to the invention; FIG. 1: Element mounting panel, 2: Solar cell element, 3:
Terminal, 81: Module, 82: External lead.

Claims (1)

[Claims] 1. In a device in which a large number of solar cell elements are connected in series and terminals are provided at both ends, the series circuit of the elements forms a plurality of loops, and each of these loops is A solar cell module characterized in that the solar cell modules are connected to each other in a manner that cancels out voltages induced within the loop. 2. The solar cell module according to claim 1, wherein the terminals are arranged close to each other.