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Application of Composite Strap Touch Finger in Photovoltaic Connector


Release time:

2022-05-11

At present, the rapid development of photovoltaic industry, technological innovation emerge in endlessly. For photovoltaic connectors, only after two generations of transformation, perhaps "stability" is the road to its development. "Stability" refers to reliability and safety, which is closely related to the electrical connection technology and experience of the connector manufacturer. As a conductive medium, the contact finger of the composite watchband is a specially shaped elastic connecting element, which can significantly improve the quality of electrical connection and energy transmission, so that the connector has a continuously low contact resistance.

Application of Composite Strap Touch Finger in Photovoltaic Connector

At present, the rapid development of photovoltaic industry, technological innovation emerge in endlessly. For photovoltaic connectors, only after two generations of transformation, perhapsStableThis is their path of development. “StableIt refers to the reliability and safety, which is closely related to the electrical connection technology level and experience of the connector manufacturer. As a conductive medium, the contact finger of the composite watchband is an elastic connecting element with a special shape,The quality of the electrical connection and the energy transmission can be significantly improved, so that the connector has a consistently low contact resistance.

复合表带触指

       1. A Brief History of Photovoltaic Connectors

Before the advent of photovoltaic connectors, photovoltaic power plants were connected mainly throughSplicing(screw terminals or bonded connectors) to achieve.With the development of the industry, the demand for fast, safe and easy-to-operate connection solutions is growing.

Evolution of Photovoltaic Connectors

In the form of electronic connection, the joint is hardwired, and staubir mc3and mc4The connector uses technology that is brought to the finger. Stowell strap touch technology has been applied in the field of electronic connectors.50Years of history, widely used in photovoltaic, power transmission and distribution, automation and power transportation.20Multiple industries.

2. Technology of composite watchband touch fingers

An electrical connection refers to a separable connection that connects two live conductors by mechanical force.However, the contact coverage (surface contact area) created by this mechanical force is not equal to the effective contact surface of the load current.The effective contact area is significantly smaller than the surface contact area, and the current path is concentrated at a single contact point, resulting in increased resistance.It seems to be the connection between surface and surface, but it is actually the connection between point and point.

3.Composite watchband contact finger surface for contact with different areas and effective contact surface

Multimode technology, also known as strap touch finger technology, creates parallel contact points between the two contact surfaces. Each contact piece forms an independent elastic tidal bridge, which greatly reduces the overall contact resistance. Each contact plate can accurately calculate the contact resistance based on the contact force, geometry, elastic properties, and hardness and performance of a given contact material.

MULTILAMThe contact resistanceR1is equal to the resistance of the contact pads connected in parallel. The overall shape of each contact piece is designed to achieve a long operating life. The constant elastic pressure of the sheet allows the connection between the contact interfaces to remain stable, thereby achieving a constant low resistance (see Figure5)。 3)。

4.Application of Composite Watch Band Touch Finger Technology in Photovoltaic Connector

Compared with the various types of belt fingers used in the power transmission and distribution industry, the belt finger used by the photovoltaic connector is relatively single. The photovoltaic connector mentioned aboveStabilityOn the one hand, it refers to the structure and shape of the photovoltaic connector20There has not been much change over the years. On the other hand, the stability of the photovoltaic connector must be reflected in long-term use, which is closely related to the finger touch of the strap.

Composite Strap Touch FingerAccording to the different application development environment of the enterprise, we have very strict regulations on materials, coatings, types, sizes, positive pressures, installation slot design methods, etc.This paper focuses on data analysis from the perspective of size matching and the overall process of the strap touch finger.

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