KR20210095303A - Automatic Bond strength Measuting Apparatus of Lead Wire with Attached Solar Cell - Google Patents

Abstract

The present invention provides an automatic bonding force measuring device of a lead wire bonded to a solar cell to provide automatic batch tensioning of multiple lead wires bonded to cells of a solar module and efficiently measure the bonding strength of the lead wire bonded to the solar cell. The device comprises: a body frame having a worktable and an operating means; a locking jig unit configured to be movable in a straight line back and forth on the worktable of the body frame and for seating and locking a solar cell; a measuring unit configured to be movable vertically on the body frame corresponding to the locking jig unit and measuring the bonding strength while gripping and pulling a lead wire in the solar cell fixed on the locking jig unit; and a measurement value processing unit for analyzing a measurement value of the bonding strength of the lead wire input from the measuring unit and outputting the measurement value to be monitored in real time.

Description

{Automatic Bond strength Measuting Apparatus of Lead Wire with Attached Solar Cell}

The present invention relates to an apparatus for measuring the automatic bonding force of a lead wire bonded to a photovoltaic cell, and more particularly, to automatically collectively tension multiple lead wires joined to a cell of a photovoltaic module to measure the bonding strength of a lead wire joined to a photovoltaic cell. It relates to an automatic bonding force measuring device of a lead wire bonded to a photovoltaic cell that can be efficiently measured.

Recently, as the demand for electricity has rapidly increased, in addition to the conventional method of generating electricity using fossil fuels such as coal or oil, electricity production methods using renewable energy such as solar, bio, wind, geothermal, and marine energy are in the spotlight. . Among them, solar cell modules that convert solar energy into electrical energy are being actively developed, and solar power generation systems using solar cell modules do not have any mechanical or chemical action in the process of converting solar energy into electrical energy. The simple structure of the system requires almost no maintenance, and once installed, it has a long lifespan and is environmentally friendly.

In general, photovoltaic power generation is a power generation technology that converts sunlight into electric energy using photovoltaic cells without the help of a generator. Photovoltaic cells are the core of photovoltaic power generation, and when sunlight hits, physical reaction occurs due to the photoelectric effect. This will cause the photovoltaic cell to generate a direct current.

Here, a lead wire in the form of a wire for transmitting power is bonded to the surface of the photovoltaic cell by a soldering method, and a plurality of photovoltaic cells are manufactured to be connected by the lead wire.

As such, it is necessary to measure the characteristics of the photovoltaic cell when manufacturing the photovoltaic cell or for performance evaluation. For example, solar cell characteristics include current-voltage (IV) characteristics, solar energy conversion efficiency, fill factor, shunt resistance, series resistance, and open circuit voltage. Electrical characteristics such as (Voc) and short-circuit current (Jsc), microcracks, defects, electrode failure, hot spots, minority carrier lifetime, etc. It has physical properties. In general, the electrical properties are measured using a solar simulator, and the physical properties are measured using a visible/near-infrared image detector (CCD camera, etc.) Alternatively, images of transmitted light (PL) and electroluminescence (EL) are analyzed and measured.

As a prior art disclosed for measuring the characteristics of a photovoltaic cell as described above, Korean Patent Application Laid-Open No. 49062 (2013.05.13.) describes a cell installed in the field and generating electric power by accumulating sunlight therein. solar modules connected and placed in series on; an electronic load provided so that a specific current flows through the cells in the solar module; a control unit for receiving a first percentage value compared to a short-circuit current (Isc) or a second percentage value compared to a maximum power current (Imp) and transmitting the input to the electronic load unit so that the specific current flows to the electronic load; After the specific current flows for a certain period of time, a thermal imaging camera for photographing the solar module to check whether a hot spot occurs in the cell; A hot spot measuring device of a cell in a solar module is known which can provide a criterion that the cell does not act as a hot spot in any environment and temperature.

However, in the prior art, it is difficult to produce a product having a constant adhesive strength due to the absence of a measurement technology capable of confirming the bonding state of the lead wire bonded to the surface of the photovoltaic cell, which leads to deterioration of product quality.

Accordingly, there is an urgent need to develop a technology for a measuring device capable of collectively measuring the bonding force with respect to the lead wire bonded to the photovoltaic cell.

KR Patent Publication No. 10-2013-0049062 (2013.05.13.)

The present invention is intended to solve the above problems, and since it is configured to uniformly and automatically measure the maximum bonding force that can be endured when the lead wire bonded to the photovoltaic cell is stretched, the measurement precision for the joint strength of the lead wire is increased and the measurement is quick. It is an object of the present invention to provide an automatic bonding force measuring device of a lead wire bonded to a photovoltaic cell that can promote work and improve product quality.

The automatic coupling force measuring apparatus of the lead wire bonded to the photovoltaic cell proposed by the present invention comprises: a body frame having a work table and an operating means; a locking jig unit configured to be movable back and forth on the workbench of the main frame and fixed by locking the solar cell; a measuring unit configured to be movable vertically and vertically on the body frame in response to the locking jig unit, and measuring the bonding strength while gripping and pulling a lead wire in a photovoltaic cell fixed on the locking jig unit; and a measurement value processing unit that analyzes the measurement value of the bonding strength of the lead wire input from the measurement unit and outputs the measurement value so that it can be monitored in real time.

The locking jig unit comprises a fixing jig for fixing the photovoltaic cell in a pressing state, and a jig driving means for driving the fixing jig to move forward and backward linearly at a constant speed in response to the measurement unit.

The fixing jig includes a support stage for seating and supporting a photovoltaic cell on the upper part, and one end is hinged on the support stage to rotate, but press and fix the upper surface of the photovoltaic cell seated on the support stage, and the lead wire is detachable An upper pressing plate forming a guide path, and a locking means installed on the support stage and provided to bind and fix the upper pressing plate are constituted.

The measuring unit includes a clamp member for forming one end of a lead wire in a photovoltaic cell to be gripped, a load cell means for connecting and supporting the clamp member, but measuring the bonding strength of the lead wire by a pulling force, and supporting the load cell means It is fixed but constitutes a measuring elevating means that is driven to move up and down at a constant speed corresponding to the locking jig unit.

The measurement value processing unit includes: a peak point display unit for graphing in real time the measured value of lead wire bonding strength according to the input signal of the measurement unit; A result determining unit for determining the measurement result by comparing the measured value of the unit with a set reference value, the peak point display unit, the average value calculating unit, and a DB storage unit for storing the measurement data for the result determining unit in a database form are configured.

According to the automatic coupling force measuring apparatus of the lead wire bonded to the photovoltaic cell according to the present invention, the measured value is automatically measured while the maximum coupling force that can be endured when the lead wire joined to the photovoltaic cell is pulled is configured to be stored, so the lead wire of the photovoltaic cell It not only improves the measurement technology of bonding strength, but also realizes excellent measurement precision and work speed, and achieves the effect of promoting excellent quality while improving the production of solar cells.

1 is a front view showing an embodiment according to the present invention.
Figure 2 is a side view showing an embodiment according to the present invention.
Figure 3 is a plan view showing a locking jig unit in one embodiment according to the present invention.
Figure 4 is a side view showing a fixing jig of the locking jig unit in one embodiment according to the present invention.
5 is a front view showing a measuring unit in an embodiment according to the present invention.
6 is a block diagram showing a measurement value processing unit in an embodiment according to the present invention.
7 is a configuration diagram schematically showing an operating state of an embodiment according to the present invention.

The present invention comprises: a body frame having a work table and operating means; a locking jig unit configured to be movable back and forth on the workbench of the main frame and fixed by locking the solar cell; a measuring unit configured to be movable vertically and vertically on the body frame in response to the locking jig unit, and measuring the bonding strength while gripping and pulling a lead wire in a photovoltaic cell fixed on the locking jig unit; An automatic coupling force measuring device of a lead wire bonded to a photovoltaic cell comprising a; a measurement value processing unit that analyzes the measurement value for the bonding strength of the lead wire input from the measurement unit and outputs it so that it can be monitored in real time .

Next, a preferred embodiment of the automatic coupling force measuring apparatus of the lead wire bonded to the photovoltaic cell according to the present invention will be described in detail with reference to the drawings.

First, an embodiment of the automatic coupling force measuring apparatus of the lead wire bonded to the photovoltaic cell according to the present invention is as shown in FIGS. 1 and 2, a body frame 10, a locking jig unit 20, and a measuring unit ( 30), and a measurement value processing unit 40 .

The body frame 10 supports the overall components of the present invention (the locking unit 20, the measurement unit 30, the measurement value processing unit 40, etc.), but is mounted to exhibit individual functions for each component. It forms the most basic structure to support.

The body frame 10 is provided with a workbench 11 having a divided space for measurement work. That is, the configuration for the measurement operation, that is, the lock jig unit 20 and the measurement unit 30 are located on the worktable 11 of the body frame 10, so that the measurement operation on the photovoltaic cell C can be performed. to make up

The body frame 10 is provided with an operating means 13 in the form of a switch or button.

The operation means 13 includes a power switch for turning on/off the power of the device, and preparing, measuring, and stopping for driving the locking jig unit 20 and the measuring unit 30 for measurement work. The buttons are configured to be equipped separately.

As shown in FIG. 1 , a display panel 15 is configured on the upper side of the body frame 10 to monitor the overall progress and results as measured by the measurement unit 30 .

The locking jig unit 20 performs a function of locking and fixing the photovoltaic cell (C) in a floating state and moving the position at the same time for the measurement operation.

As shown in FIGS. 1 and 2 , the locking jig unit 20 is installed so as to be provided on the work table 11 of the body frame 10 .

As shown in FIG. 3, the locking jig unit 20 includes a fixing jig 21 for seating and locking the photovoltaic cell C, and the fixing jig 21 on the work table 11 in a straight line back and forth. A jig driving means 27 for movably driving is constituted.

As shown in FIGS. 3 and 4, the fixing jig 21 is a configuration for fixing the photovoltaic cell C in a pressing state, and a support stage 22 and an upper pressing plate 23, and a locking means 25 ) constitutes

The support stage 22 is seated and supported on the upper portion of the photovoltaic cell (C), and the upper surface is formed to form a flat horizontal surface.

The support stage 22 has an outer frame 22a having a flow space therein, and a jig plate 22b positioned to correspond to the flow space of the outer frame 22a and supporting the solar cell C on the upper surface. to provide

The support stage 22 constitutes a plurality of buffer springs 22c installed in the flow space of the outer frame 22a to elastically support the jig plate 22b. That is, when pressed by the upper pressing plate 23 in the support stage 22, the buffer spring 22c so that the jig plate 22b supporting the photovoltaic cell C can elastically flow in the vertical direction. Because of the configuration, it is possible to improve the locking efficiency of the photovoltaic cell (C) while protecting the photovoltaic cell (C) according to the pressing contact of the upper pressing plate (23).

The upper pressing plate 23 is installed on the support stage 22 to press and fix the upper surface of the photovoltaic cell C seated on the support stage 22, but is hinged at one end of the support stage 22. Combined and rotatably installed.

A guide path 24 is formed on the upper pressure plate 23 to form a path through which the lead wire L bonded on the photovoltaic cell C can be separated from the photovoltaic cell C. As shown in FIG.

The guide path 24 is formed through the upper pressure plate 23 in the vertical direction, and is formed in the form of a long hole extending back and forth on the upper pressure plate 23 .

The locking means 25 is installed on the support stage 22 and provided to bind and fix the upper pressing plate 23 in a locked state.

The jig driving means 27 drives the fixing jig 21 located on the worktable 11 of the main frame 10 to move forward and backward in a straight line in response to the measuring unit 30 . That is, the jig driving means 27 is driven to linearly move forward when preparing for measurement, and linearly move backward when measuring.

The jig driving means 27 is rotatable by screwing the pair of Y-axis rails 27a installed on the worktable 11 of the main frame 10 with left and right intervals, and the fixing jig 21 . A Y-axis feed shaft 27b provided in the above manner and a Y-axis drive motor 27c installed on one side of the Y-axis feed shaft 27b to apply rotational power are constituted.

The jig driving means 27 drives the fixing jig 21 to move at a constant speed.

The measurement unit 30 performs a function of measuring the bonding strength while pulling the lead wire (L) bonded to the photovoltaic cell (C).

The measuring unit 30 is configured to be movable vertically and vertically on the body frame 10 in correspondence to the locking jig unit 20 .

As shown in FIGS. 2 and 5 , the measuring unit 30 measures the bonding strength while holding the lead wire L in the photovoltaic cell C fixed on the locking jig unit 20 and then pulling and driving. As a configuration, the clamp member 31, the load cell means 33, and the measurement lifting means 35 are constituted.

The clamp member 31 is connected to the load cell means 33 through a wire rod, and forms a clamp so that one end of the lead wire L can be gripped in the photovoltaic cell C.

The load cell means 33 connects and supports the clamp member 31 , but measures the pulling force in the gripping state of the lead wire L, and thus measures the bonding strength of the lead wire L.

In the load cell means 33, as a transducer for measuring force or load, it is possible to apply the same structural configuration of a general load meter or load sensor that can take out an output electrically, and the structural configuration of a load cell, so a detailed description is omitted. do.

The measuring lifting means 35 supports and fixes the plurality of load cell means 33 .

The measuring elevating means 35 is driven to move up and down at a constant speed corresponding to the locking jig unit 20 . That is, the measurement elevating means 35 is driven to linearly move downward to grip the lead wire L when preparing for measurement, and to linearly move upward during measurement.

The measuring elevating means 35 is a pair of Z-axis rails 35a installed with left and right intervals on the wall surface of the worktable 11 of the main frame 10, and can move linearly on the Z-axis rails 35a. A lifting frame (35b) for supporting and fixing the plurality of load cell means (33) and a Z-axis transfer shaft (35c) rotatably provided by screwing to the lifting frame (35b), and the Z-axis transfer It is connected to the upper end of the shaft (35c) and constitutes a Z-axis driving motor (35d) for applying rotational power.

The measurement value processing unit 40 performs a function of outputting a measurement value of the bonding strength of the lead wire L input from the measurement unit 30 so that it can be monitored in real time.

In the above, the processing result of the measurement value processing unit 40 is output through the display panel 15 of the body frame 10 .

The measurement value processing unit 40 analyzes the measurement value in the measurement unit 30 to derive a measurement result. That is, as shown in FIGS. 6 and 7 , the measured value processing unit 40 includes a peak point display unit 41 , an average value calculation unit 43 , a result determination unit 45 , and a DB storage unit 47 . do.

The peak point display unit 41 graphs the measured value of the lead wire (L) bonding strength according to the input signal of the measurement unit 30 to be displayed in real time.

The average value calculation unit 43 calculates an average value for all the measured values of the measurement unit 30 and then displays it.

The result determination unit 45 compares the measurement value of the measurement unit 30 with a set reference value to determine to display the measurement result. That is, only when a measured value higher than the set reference value is input in the result determination unit 45, it is determined as the normal joint strength and "OK" is displayed.

The DB storage unit 47 stores the measurement data for the peak point display unit 41 , the average value calculation unit 43 , and the result determination unit 45 in the form of a database.

In the case of the measured data stored in the DB storage unit 47, the operator can call it from time to time and check it through the display panel 15.

Briefly describing the operating state of the present invention configured as described above, first, the solar cell C is seated on the fixing jig 21 of the locking jig unit 20 and locked in a press-compression state, and the operation means 13 ), when the button for measurement preparation is input, the jig driving means 27 of the locking jig unit 20 is driven to load the fixing jig 21 forward and at the same time the measurement elevating means of the measurement unit 30 (35) is driven to move the load cell means (33) down. Then, when the lead wire L is gripped from the clamp member 31 of the measurement unit 30 and a button for starting measurement is input among the operation means 13, the jig driving means 27 of the locking jig unit 20 is ) is driven to unload the fixing jig 21 to the rear, and at the same time, the measuring elevating means 35 of the measuring unit 30 is driven to move the load cell means 33 upward, so the pull according to the mutual movement The load cell means 33 measures the holding force to measure the bonding strength of the lead wire (L).

That is, according to the automatic coupling force measuring device of the lead wire bonded to the photovoltaic cell according to the present invention configured as described above, the measured value is stored while automatically measuring the maximum coupling force that can be endured when the lead wire joined to the photovoltaic cell is pulled. Therefore, it is possible to not only measure the lead wire bonding strength of photovoltaic cells, but also to implement excellent measurement precision and work speed, and to promote superior quality while improving photovoltaic cell production.

In the above, the preferred embodiment of the automatic coupling force measuring apparatus of the lead wire bonded to the photovoltaic cell according to the present invention has been described, but the present invention is not limited thereto, and various It is possible to carry out a modified branch, and this also falls within the scope of the present invention.

10: body frame 11: work table 13: operating means
15: display panel 20: locking jig unit 21: fixing jig
22: support stage 22a: outer frame 22b: jig plate
22c: buffer spring 23: upper press plate 24: guide
25: locking means 27: jig driving means 27a: Y-axis rail
27b: Y-axis feed shaft 27c: Y-axis drive motor 30: Measuring unit
31: clamp member 33: load cell means 35: measurement elevating means
35a: Z-axis rail 35b: Elevating frame 35c: Z-axis feed axis
35d: Z-axis driving motor 40: measured value processing unit 41: peak point display unit
43: average value calculation unit 45: result determination unit 47: DB storage unit

Claims (5)

a body frame having a work table and operating means;
a locking jig unit configured to be movable back and forth on the workbench of the main frame and fixed by locking the solar cell;
a measuring unit configured to be movable vertically and vertically on the body frame corresponding to the locking jig unit, and measuring the bonding strength while gripping and pulling a lead wire in a photovoltaic cell fixed on the locking jig unit;
Automatic coupling force measuring device of a lead wire bonded to a photovoltaic cell comprising a; a measurement value processing unit that analyzes the measurement value of the bonding strength of the lead wire input from the measurement unit and outputs it to be monitored in real time.
The method according to claim 1,
The locking jig unit is bonded to a photovoltaic cell comprising a fixing jig for fixing the solar cell in a pressing state, and a jig driving means for driving the fixing jig to move forward and backward linearly at a constant speed corresponding to the measurement unit. Automatic bonding force measuring device of the old lead wire.
3. The method according to claim 2,
The fixing jig includes a support stage for seating and supporting a photovoltaic cell on the upper portion, and one end is hinged on the support stage and rotates, but the upper surface of the photovoltaic cell seated on the support stage is pressed and fixed and the lead wire is detachable An automatic coupling force measuring device of a lead wire bonded to a photovoltaic cell comprising: an upper pressing plate forming a guide path; and a locking means installed on the support stage and provided to bind and fix the upper pressing plate.
The method according to claim 1,
The measuring unit includes a clamp member for forming one end of a lead wire in a photovoltaic cell to be gripped, a load cell means for connecting and supporting the clamp member but measuring the bonding strength of the lead wire by a pulling force, and supporting the load cell means An automatic coupling force measuring device of a lead wire bonded to a photovoltaic cell comprising a measuring elevating means fixed to be fixed but driven to move up and down at a constant speed in response to the locking jig unit.
The method according to claim 1,
The measurement value processing unit includes: a peak point display unit for graphing in real time the measured value of lead wire bonding strength according to the input signal of the measurement unit; A mode comprising: a result determination unit for determining a measurement result by comparing the measurement value of the unit with a set reference value; Automatic bonding force measuring device of lead wire bonded to optical cell.

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