CN102176642A

CN102176642A - Detachable structure of bus electrolytic capacitor of photovoltaic inverter

Info

Publication number: CN102176642A
Application number: CN2011100263770A
Authority: CN
Inventors: 牟英峰
Original assignee: WUXI VICTORY POWER NEW ENERGY TECHNOLOGY Co Ltd
Current assignee: WUXI VICTORY POWER NEW ENERGY TECHNOLOGY Co Ltd
Priority date: 2011-01-25
Filing date: 2011-01-25
Publication date: 2011-09-07

Abstract

The invention relates to a detachable structure of a bus electrolytic capacitor of a photovoltaic inverter. The detachable structure comprises an electrolytic capacitor module. The electrolytic capacitor module consists of an electrolytic capacitor and an electrolytic capacitor module printing circuit board (PCB); the electrolytic capacitor is arranged on one surface of the electrolytic capacitor module PCB; a positive terminal and a negative terminal of the electrolytic capacitor are inserted into circular holes corresponding to the electrolytic capacitor PCB and are welded and fixed; the other surface of the electrolytic capacitor PCB is connected with a circuit of a BUS capacitor set through copper foils; and the electrolytic capacitor module PCB is connected with a main power board through a supporting connecting terminal. The detachable structure can prevent the whole machine from being repeatedly installed and debugged, and can greatly reduce the maintaining cost. Moreover, the service life of the product can be prolonged by changing the electrolytic capacitor module, so the competitiveness of the product is improved.

Description

A kind of photovoltaic DC-to-AC converter bus electrochemical capacitor demountable structure

Technical field

The present invention relates to a kind of photovoltaic DC-to-AC converter bus electrochemical capacitor demountable structure, belong to the photovoltaic DC-to-AC converter skill and ask the field.

Background technology

At present in the photovoltaic DC-to-AC converter field, electrochemical capacitor is a kind of key element, it has short self-defect in useful life, present photovoltaic DC-to-AC converter field, two kinds of processing modes are arranged basically, as shown in Figure 1: a kind of thin-film capacitor 2 that is to use substitutes electrochemical capacitor 1, though can prolong certain useful life, but as bus capacitor, because thin-film capacitor monomer appearance value is little, cause the thin-film capacitor usage quantity much larger than electrochemical capacitor, the problem of bringing product cost significantly to increase thus, and its usage quantity is much larger than electrochemical capacitor, machine volume is increased, increased the complete machine structure cost, on the other hand, the service life of the photovoltaic plant that photovoltaic DC-to-AC converter is supporting is 25 years, certain useful life can be prolonged though use expensive thin-film capacitor to substitute electrochemical capacitor, the service life identical can't be reached 25 years with photovoltaic plant; Second kind of processing mode is that main power amplifier board or the complete machine that comprises electric capacity when photovoltaic DC-to-AC converter reaches useful life changed, though this mode can guarantee the operation of photovoltaic plant, but because photovoltaic DC-to-AC converter use the region wide, change often, main power replacement cost height, complete machine cost and manpower maintenance cost are significantly increased, greatly reduce competitiveness of product.

Summary of the invention

The objective of the invention is to overcome above-mentioned weak point, thereby a kind of photovoltaic DC-to-AC converter bus electrochemical capacitor demountable structure is provided, this processing mode can effectively solve the problem of present photovoltaic DC-to-AC converter industry bus electrochemical capacitor life-span bottleneck.

According to technical scheme provided by the invention, a kind of photovoltaic DC-to-AC converter bus electrochemical capacitor demountable structure, comprise the electrochemical capacitor module, described electrochemical capacitor module is made up of electrochemical capacitor, electrochemical capacitor module pcb board, electrochemical capacitor module pcb board is simultaneously placed electrochemical capacitor, the plus end of electrochemical capacitor and negative terminal insert to weld in the circular hole corresponding in the electrochemical capacitor module pcb board and fix, electrochemical capacitor module pcb board another side is connected by the circuit of Copper Foil with the BUS capacitance group, and the support and connection terminal is connected electrochemical capacitor module pcb board with main power amplifier board.

Described electrochemical capacitor module pcb board is provided with through hole, and is furnished with Copper Foil around through hole.

Compared with the prior art the present invention has the following advantages:

The present invention is simple, compact and reasonable for structure; For fear of too short defective of the life-span that electrochemical capacitor itself has, change the processing mode that traditional use thin-film capacitor substitutes electrochemical capacitor and complete machine replacing, the bus electrochemical capacitor is spun off from main power amplifier board, form independently electrochemical capacitor module, by the support and connection terminal electrochemical capacitor module is connected with main power amplifier board then, when the electrochemical capacitor life-span reaches service life, just can reach the purpose that promotes one times of machine life by dismounting and replacing electrochemical capacitor module, the replacing of local electrochemical capacitor module simultaneously, reduced the cost that complete machine is changed to a great extent, only need change local electrochemical capacitor module when safeguarding simultaneously, avoid the repetition Installation and Debugging of complete machine, greatly reduced personnel's maintenance cost.The most important thing is,, can make the product bulk life time obtain essence and improve, promoted competitiveness of product greatly by changing the mode of electrochemical capacitor module.

Description of drawings

Fig. 1 is an electrochemical capacitor structural representation in the prior art.

Fig. 2 is a thin-film capacitor structural representation in the prior art.

Fig. 3 is user mode figure of the present invention.

Embodiment

Embodiment during following the present invention incites somebody to action in conjunction with the accompanying drawings is further described:

As shown in Figure 3: comprise electrochemical capacitor 1, electrochemical capacitor module pcb board 3, electrochemical capacitor module 4, support and connection terminal 5 and main power amplifier board 6 etc.

The present invention changes the processing mode that traditional use thin-film capacitor substitutes electrochemical capacitor and complete machine replacing, the bus electrochemical capacitor is spun off from main power amplifier board, form the electrochemical capacitor module, described electrochemical capacitor module 4 is by electrochemical capacitor 1, electrochemical capacitor module pcb board 3 is formed, electrochemical capacitor module pcb board 3 one sides are placed electrochemical capacitor 1, electrochemical capacitor 1 self attaches plus end and negative terminal, the plus end of electrochemical capacitor 1 and negative terminal inserted two corresponding place's diameters are in the circular hole of 2mm in the electrochemical capacitor module pcb board 3, undertaken fixedly connectedly by the form of wave-soldering, electrochemical capacitor module pcb board 3 another sides realize that by Copper Foil the circuit of BUS capacitance group connects.Support and connection terminal 5 is connected electrochemical capacitor module pcb board 3 with power amplifier board 6.

There are 8 places (but to be not limited to 8 places on the electrochemical capacitor module pcb board 3, through hole greater than 1 or other conduction connects all can realize conducting electricity purpose) diameter is the through hole of 4mm, and Copper Foil on the cloth around through hole, electrochemical capacitor module 4 is positioned over the top of main power amplifier board, making 8 place's diameters is that through hole and the main power amplifier board 6 upper support copper tips 5 of 4mm are mapped, closely couple together by the support copper tip 5 on 8 M3 key screw electrochemical capacitor modules 4 and the main power amplifier board 6 then, realize effective connection of electrochemical capacitor module, when the electrochemical capacitor module reaches useful life, realize the dismounting and change of electrochemical capacitor by 8 M3 screws of degree of tightness, final by dismounting and change the purpose that the electrochemical capacitor module realizes promoting one times of machine life.

Claims

1. photovoltaic DC-to-AC converter bus electrochemical capacitor demountable structure, it is characterized in that: comprise electrochemical capacitor module (4), described electrochemical capacitor module (4) is by electrochemical capacitor (1), electrochemical capacitor module pcb board (3) is formed, electrochemical capacitor module pcb board (3) one side is placed electrochemical capacitor (1), the plus end of electrochemical capacitor (1) and negative terminal insert to weld in the hole corresponding in the electrochemical capacitor module pcb board (3) and fix, electrochemical capacitor module pcb board (3) another side is connected by the circuit of Copper Foil with the BUS capacitance group, and support and connection terminal (5) is connected electrochemical capacitor module pcb board (3) with main power amplifier board (6).

2. a kind of photovoltaic DC-to-AC converter bus electrochemical capacitor demountable structure according to claim 1, it is characterized in that: described electrochemical capacitor module pcb board (3) is provided with through hole, and is furnished with Copper Foil around through hole.