Method for real-timely testing performance of multi-channel photovoltaic cell

A photovoltaic cell, real-time testing technology, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve problems such as inability to apply multi-channel photovoltaic cell automatic testing, inability to meet high-power battery pack testing, difficult multi-channel automatic testing, etc. , to achieve the effect of low cost, reliable data and stable operation

Inactive Publication Date: 2006-05-10
INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The 2420 digital source meter of Keithley Instrument Company has high measurement accuracy when used for the test of photovoltaic cells, but it cannot be applied to the automatic test of multi-channel photovoltaic cells; the TC-1100 developed by the Sixth Research Institute of the Ministry of Electronics Industry The photovoltaic battery universal test box has the advantage of being convenient to carry, but it is also difficult to realize multi-channel automatic testing; although the multi-channel photovoltaic cell aging tester developed by Australia STI company has realized the automatic cycle test of multi-channel photovoltaic cells, its power is small, Unable to meet the test of high-power battery pack
Moreover, some instruments use the two-wire method, which cannot avoid the error introduced by measuring the wire resistance and the contact resistance of the fixture when performing long-distance testing on outdoor batteries.

Method used

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  • Method for real-timely testing performance of multi-channel photovoltaic cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1: A scheme for standard testing of a single battery by a photovoltaic battery real-time monitoring system

[0020] The core of this implementation is to adopt the scheme of the utility model to carry out a standard test on a single battery. Such as figure 2 As shown, the four-wire test method is used. The standard light source adopts natural photovoltaic light or photovoltaic simulated light source. Call the test program of a single photovoltaic cell, and the computer will control the DAQ to drive the electronic load to work and collect data, and then the computer will analyze and process the obtained data. Due to the adoption of the four-wire test method and the constant current source as the electronic load, the influence of the wire resistance and the contact resistance of the fixture is overcome, and the integrity of the I-V curve is also guaranteed, so that the measurement accuracy is greatly improved.

Embodiment 2

[0021] Example 2: Aging test plan for multi-channel single battery by photovoltaic battery real-time monitoring system

[0022] Adopt the utility model to the aging test scheme of multi-channel single block battery such as image 3 As shown, the aging test uses a UV lamp as the light source. Multiple channels of batteries under test are respectively connected to 64 channels on the interface circuit. During the test, open the multi-channel photovoltaic battery aging test program, set the parameters for each battery, and after running the program, the software controls the device to automatically test the volt-ampere characteristics of the multi-channel battery. After each cycle, stop for a period of time, and then Then enter the next round of cycle. The length of the pause time can be flexibly set according to the user's needs. At the same time, the computer analyzes and processes the real-time monitoring data obtained each time, and automatically saves the final result to t...

Embodiment 3

[0023] Example 3: A real-time monitoring solution for small photovoltaic power plants by the photovoltaic battery real-time monitoring system

[0024] The real-time monitoring scheme of the small photovoltaic power station using the utility model is as follows.

[0025] Small photovoltaic power plants are mainly composed of photovoltaic cell arrays, batteries (energy storage devices), etc. The photovoltaic cell array is connected to the storage battery for energy storage, and the real-time monitoring of the photovoltaic power station is mainly the real-time test of the photovoltaic cell array. The photovoltaic cell array is formed by several high-power photovoltaic cell groups connected in series and parallel. The real-time monitoring scheme is as follows Figure 4 as shown. A single-pole double-throw relay is indirectly connected to every two high-power battery packs, and the relay switch is controlled by the test instrument. When not testing, the relay is in the normally...

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Abstract

The invention relates to a real-time measure method for the performance of multi-path photo-voltaic cell which comprises steps of: expanding measure channel via interface circuits and realizing measurement of multi-channel and continual real-time monitor of cell to get the aging characterization of photo-voltaic cell in long term working process; employing automatic control technology for real-time monitor on photo-voltaic cell and collection the light intensity and temperature of test environment. The invention has the advantages of being stable and reliable, and of being applied to the standard testing and aging testing of single and group photo-voltaic cells on process line.

Description

technical field [0001] The invention relates to the field of photovoltaic battery testing, in particular to a real-time testing method for multi-channel photovoltaic battery performance. technical background [0002] For photovoltaic cells, we need to accurately understand its electrical characteristics and conduct standard tests; at the same time, we also need to conduct research on its service life and stability. Perform real-time monitoring. The voltage of a single battery is small, so the requirements for measurement accuracy are very high. Real-time monitoring of the performance of outdoor photovoltaic cell arrays also requires the test system to be able to automatically test high-power battery packs; in addition, due to harsh outdoor conditions, large interference, and the battery under test is far away from the test system, the test wires are very long and the wires The impact of resistance on the test cannot be ignored, which also increases the requirements for the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/48G01R31/00
Inventor 翁坚陈双宏戴松元王孔嘉
Owner INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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