阅读说明：本技术 一种cigs太阳能薄膜电池的监控装置 (Monitoring device for CIGS solar thin film cell ) 是由 王传省 邱景波 张炎 徐婧 常先杰 于 2021-09-07 设计创作，主要内容包括：本发明公开了一种CIGS太阳能薄膜电池的监控装置,包括有控制模块,分别与控制模块连接的LoRa无线通信模块、电压电流检测模块和两个短路切换继电器；每个CIGS太阳能薄膜电池的正负极上分别连接有一个对应的短路切换继电器,CIGS太阳能薄膜电池的正负极上均设置有电压电流检测模块,控制模块通过LoRa无线通信模块与CIGS太阳能薄膜电池组件的上位监控系统进行无线通信连接。本发明可对单个CIGS太阳能薄膜电池进行监控,并保证CIGS太阳能薄膜电池组件的整体顺利供电。(The invention discloses a CIGS solar thin film cell monitoring device, which comprises a control module, an LoRa wireless communication module, a voltage and current detection module and two short circuit switching relays, wherein the LoRa wireless communication module, the voltage and current detection module and the two short circuit switching relays are respectively connected with the control module; the positive electrode and the negative electrode of each CIGS solar thin-film battery are respectively connected with a corresponding short-circuit switching relay, the positive electrode and the negative electrode of each CIGS solar thin-film battery are respectively provided with a voltage and current detection module, and the control module is in wireless communication connection with an upper monitoring system of the CIGS solar thin-film battery assembly through a LoRa wireless communication module. The invention can monitor a single CIGS solar thin film battery and ensure the smooth power supply of the whole CIGS solar thin film battery component.)

1. A monitoring device of a CIGS solar thin film cell is characterized in that: the device comprises a control module, an LoRa wireless communication module, a voltage and current detection module and two short circuit switching relays, wherein the LoRa wireless communication module, the voltage and current detection module and the two short circuit switching relays are respectively connected with the control module; the positive electrode and the negative electrode of each CIGS solar thin-film cell are respectively connected with a corresponding short-circuit switching relay, each short-circuit switching relay comprises a switching switch, a fixed contact, a cell connecting contact and a short-circuit contact, the fixed contact of each short-circuit switching relay is connected to a series circuit of the CIGS solar thin-film cell assembly, one end of each switching switch is connected with the fixed contact, the other end of each switching switch is connected with the cell connecting contact or the short-circuit contact, the positive electrode or the negative electrode of each CIGS solar thin-film cell is connected with the cell connecting contact of the corresponding short-circuit switching relay, and the short-circuit contacts of the two short-circuit switching relays connected to the positive electrode and the negative electrode of each CIGS solar thin-film cell are connected with each other; the control ends of two short circuit switching relays connected to each CIGS solar thin film cell are connected with a control module, voltage and current detection modules are arranged on the positive electrode and the negative electrode of each CIGS solar thin film cell, and the control modules are in wireless communication connection with an upper monitoring system of the CIGS solar thin film cell assembly through LoRa wireless communication modules.

2. The CIGS solar thin film cell monitoring device as claimed in claim 1, wherein: and the power supply input end of the control module is connected with the corresponding CIGS solar thin film cell to realize power supply.

3. The CIGS solar thin film cell monitoring device as claimed in claim 2, wherein: the control module is connected with a micro battery, and the micro battery is used for standby power supply of the control module.

4. The CIGS solar thin film cell monitoring device as claimed in claim 1, wherein: the two short circuit switching relays are interlocking relays, namely the switching switches of the two short circuit switching relays connected to the positive electrode and the negative electrode of each CIGS solar thin film cell are switched to be communicated with the short circuit contacts or are switched to be communicated with the cell connecting contacts at the same time.

5. The CIGS solar thin film cell monitoring device as claimed in claim 1, wherein: in the two short-circuit switching relays connected to each CIGS solar thin-film cell, the fixed contact of one short-circuit switching relay is connected with the anode plug of the CIGS solar thin-film cell, and the fixed contact of the other short-circuit switching relay is connected with the cathode plug of the CIGS solar thin-film cell.

6. The CIGS solar thin film cell monitoring device as claimed in claim 5, wherein: and a public cable is connected between the positive plug and the negative plug of the CIGS solar thin film cell.

Technical Field

The invention relates to the technical field of CIGS solar thin film cells, in particular to a CIGS solar thin film cell monitoring device.

Background

With the popularization of energy conservation and emission reduction, renewable energy sources are more and more widely applied. Solar energy gradually becomes a main force for replacing traditional energy due to cleanness and acquisition convenience, a CIGS (copper-indium-gallium-selenium) solar thin film battery assembly suitable for a BIPV application environment is gradually accepted by everyone, and the current installation mode of the CIGS solar thin film battery assembly basically connects a plurality of CIGS solar thin film batteries in series and then accesses a busbar nearby, an inverter and an electric network.

However, the mode of group installation and group monitoring is not easy to find out the fault power generation glass assembly, so that the later power generation glass curtain wall is inconvenient to maintain in the future, and a large amount of manpower and material resources are wasted. There are mainly the following problems: (1) the fault location is inaccurate, and the maintenance workload is large. The existing CIGS solar thin film cell installation mode is a grouping cascade installation mode, so that any CIGS solar thin film cell has a problem, a maintainer needs to repeatedly check each CIGS solar thin film cell in the group to determine a fault position, the maintenance efficiency is extremely low, and the maintenance glass curtain wall belongs to limited space operation, so that the risk of maintenance operation is increased even if the maintenance glass curtain wall stays in the group for a long time. (2) And the power generation efficiency is low. The series connection mode is accessed, one CIGS solar thin film cell is damaged, all the CIGS solar thin film cells in series connection cannot output the generated electric energy, and the overall power generation efficiency of the CIGS solar thin film cell module is reduced. (3) And the power generation production is not monitored. The current, voltage, power, state and other information of each CIGS solar thin film cell cannot be accurately collected.

Disclosure of Invention

The invention aims to provide a CIGS solar thin film cell monitoring device, which is used for monitoring a single CIGS solar thin film cell and ensuring that the whole CIGS solar thin film cell module is smoothly powered.

The technical scheme of the invention is as follows:

a CIGS solar thin film cell monitoring device comprises a control module, an LoRa wireless communication module, a voltage and current detection module and two short circuit switching relays, wherein the LoRa wireless communication module, the voltage and current detection module and the two short circuit switching relays are respectively connected with the control module; the positive electrode and the negative electrode of each CIGS solar thin-film cell are respectively connected with a corresponding short-circuit switching relay, each short-circuit switching relay comprises a switching switch, a fixed contact, a cell connecting contact and a short-circuit contact, the fixed contact of each short-circuit switching relay is connected to a series circuit of the CIGS solar thin-film cell assembly, one end of each switching switch is connected with the fixed contact, the other end of each switching switch is connected with the cell connecting contact or the short-circuit contact, the positive electrode or the negative electrode of each CIGS solar thin-film cell is connected with the cell connecting contact of the corresponding short-circuit switching relay, and the short-circuit contacts of the two short-circuit switching relays connected to the positive electrode and the negative electrode of each CIGS solar thin-film cell are connected with each other; the control ends of two short circuit switching relays connected to each CIGS solar thin film cell are connected with a control module, voltage and current detection modules are arranged on the positive electrode and the negative electrode of each CIGS solar thin film cell, and the control modules are in wireless communication connection with an upper monitoring system of the CIGS solar thin film cell assembly through LoRa wireless communication modules.

And the power supply input end of the control module is connected with the corresponding CIGS solar thin film cell to realize power supply.

The control module is connected with a micro battery, and the micro battery is used for standby power supply of the control module.

The two short circuit switching relays are interlocking relays, namely the switching switches of the two short circuit switching relays connected to the positive electrode and the negative electrode of each CIGS solar thin film cell are switched to be communicated with the short circuit contacts or are switched to be communicated with the cell connecting contacts at the same time.

In the two short-circuit switching relays connected to each CIGS solar thin-film cell, the fixed contact of one short-circuit switching relay is connected with the anode plug of the CIGS solar thin-film cell, and the fixed contact of the other short-circuit switching relay is connected with the cathode plug of the CIGS solar thin-film cell.

And a public cable is connected between the positive plug and the negative plug of the CIGS solar thin film cell.

The invention has the advantages that:

(1) the CIGS solar thin film battery fault location device is connected to each CIGS solar thin film battery, can monitor the state of a single CIGS solar thin film battery in the power generation process, namely accurately monitor the information of the power, the voltage, the running state and the like of each CIGS solar thin film battery, can accurately locate the fault of each CIGS solar thin film battery, and greatly reduces the workload of personnel for judging fault points.

(2) The CIGS solar thin-film battery module monitoring system is connected with an upper monitoring system through the LoRa wireless communication module, is suitable for monitoring the CIGS solar thin-film battery module in a large range, and meets the monitoring requirements of monitoring communication stability and low power consumption.

(3) The short-circuit switching relay is arranged to judge that one CIGS solar thin-film cell fails, and then the short-circuit line of the CIGS solar thin-film cell is switched to be communicated, so that the whole smooth power supply of the CIGS solar thin-film cell assembly is ensured, and the electric energy generated by other CIGS solar thin-film cells can be continuously transmitted to the inverter.

(4) The invention is provided with the public cable, and mainly aims to reduce the wiring workload of field construction, and only front-back butt joint of the public cable is needed during field construction, and no public power supply cable is needed to be additionally laid.

Drawings

Fig. 1 is a block diagram of the present invention.

Fig. 2 is a circuit diagram of the short switching relay of the present invention connected to a CIGS solar thin film cell.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 and 2, a CIGS solar thin film cell monitoring device includes a control module 1, an LoRa wireless communication module 2, a voltage and current detection module 3, and two short circuit switching relays 4, which are respectively connected to the control module 1; each CIGS solar thin film cell 5 is connected with a corresponding short circuit switching relay 4 on the positive electrode and the negative electrode respectively, each short circuit switching relay 4 comprises a switching switch, a fixed contact, a cell connecting contact and a short circuit contact, in the two short circuit switching relays 4 connected on each CIGS solar thin film cell 5, the fixed contact of one short circuit switching relay 4 is connected with the positive electrode plug 6 of the corresponding CIGS solar thin film cell, the fixed contact of the other short circuit switching relay 4 is connected with the negative electrode plug 7 of the corresponding CIGS solar thin film cell, a common cable 8 is connected between the positive electrode plug 6 and the negative electrode plug 7 of the CIGS solar thin film cell, one end of the switching switch is connected with the corresponding fixed contact, the other end of the switching switch is connected with the cell connecting contact or the short circuit contact, the positive electrode or the negative electrode of each CIGS solar thin film cell 5 is connected with the cell connecting contact of the corresponding short circuit switching relay 4, the short-circuit contacts of the two short-circuit switching relays 4 connected to the positive electrode and the negative electrode of each CIGS solar thin-film cell 5 are connected with each other; the control ends of two short circuit switching relays 4 connected to each CIGS solar thin film cell 5 are connected with a control module 1, voltage and current detection modules 3 are arranged on the positive electrode and the negative electrode of each CIGS solar thin film cell 5, and the control module 1 is in wireless communication connection with an upper monitoring system of the CIGS solar thin film cell assembly through a LoRa wireless communication module 2.

The power supply input end of the control module 1 is connected with the corresponding CIGS solar thin film cell 5 to realize power supply; the control module 1 is also connected with a micro battery, and the micro battery is used for standby power supply of the control module 1.

The two short circuit switching relays 4 are interlocking relays, that is, the two short circuit switching relays 4 connected to the positive electrode and the negative electrode of each CIGS solar thin film cell 5 have their switches switched to the short circuit contact connection or the cell connection contact connection at the same time.

The voltage and current detection module 3 detects the positive and negative electrodes at two ends of a single CIGS solar thin film cell 5 in real time, and accurately detects the information such as the voltage, the current, the running state and the like of the single CIGS solar thin film cell 5; the control module 1 packs the acquired voltage and current information according to the designed frequency and sends the information to the LoRa wireless communication module 2 at regular intervals, the information is sent to the LoRa gateway through the LoRa wireless communication module 2, the upper monitoring system of the CIGS solar thin film battery component receives the state information of the information to each CIGS solar thin film battery 5 through the LoRa gateway, the upper monitoring system can judge that one CIGS solar thin film battery 5 has a fault through the collected information, then the upper monitoring system sends a control instruction to the control module 1 through the LoRa wireless communication module 2, the control module 1 controls the switching switches of the two short-circuit switching relays 4 connected to the failed CIGS solar thin-film cell 5 to be switched to be communicated with the short-circuit contacts, at the moment, the failed CIGS solar thin film cell 5 is switched to a short circuit mode, so that the electric energy generated by the series connection of other CIGS solar thin film cells can be continuously transmitted to the inverter.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.