CN103888055A - Over-temperature state indication type photovoltaic junction box based on thermistor temperature measurement - Google Patents
Over-temperature state indication type photovoltaic junction box based on thermistor temperature measurement Download PDFInfo
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- CN103888055A CN103888055A CN201410078390.4A CN201410078390A CN103888055A CN 103888055 A CN103888055 A CN 103888055A CN 201410078390 A CN201410078390 A CN 201410078390A CN 103888055 A CN103888055 A CN 103888055A
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- circuit module
- diode
- photovoltaic
- junction box
- thermistor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
The invention discloses an over-temperature state indication type photovoltaic junction box based on thermistor temperature measurement. The junction box comprises a diode string, photovoltaic cable ports, a thermistor temperature measurement circuit module and an LED over-temperature state indication circuit module, wherein the diode string comprises a plurality of diodes in serial connection in the same direction, the diodes are as many as photovoltaic batteries, the diodes and the photovoltaic batteries correspond to each other and are in parallel connection, the two photovoltaic cable ports are connected to the two ends of the diode string respectively, the thermistor temperature measurement circuit module is respectively connected with lines of the diodes in the diode string, the output end of the thermistor temperature measurement circuit module is connected with the LED over-temperature state indication circuit module, and the LED over-temperature state indication circuit module is connected with the output end of the thermistor temperature measurement circuit module and comprises a plurality of LED indication diodes installed on the surface of an upper cover of the photovoltaic junction box. According to the photovoltaic junction box, when a thermistor detects that currents flowing through the diodes are exceedingly high, the LED indication diodes on the surface of the junction box are controlled to be in an over-temperature abnormal state, and temperature monitoring and warning of the photovoltaic wiring box are achieved.
Description
Technical field
The present invention relates to field of photovoltaic power generation, relate in particular to the photovoltaic junction box being applied in photovoltaic generating system, particularly a kind of over-temperature condition indicator type photovoltaic junction box based on thermistor temperature detecting.
Background technology
In the electric connection technology of photovoltaic generating system, conventionally adopting photovoltaic junction box to realize photovoltaic module is the electrical connection between solar battery group and inverter.Current photovoltaic junction box arranges an installation cavity between box body, is arranged in installation cavity with the conducting strip of diode.The quantity of diode is identical with the quantity of solar cell, and with solar cell one by one correspondence be connected in parallel.The effect of diode is to utilize the principle of its forward conduction, oppositely cut-off to prevent that reverse charging from damaging solar battery group, and prevents that the solar cell from opening circuit and cause whole solar battery group all cannot use.When solar battery group all when normal, do not have electric current to flow through diode; When having a solar cell because fortuitous event is cannot normal power generation time, diode protection state starts, and has larger electric current and flows through diode.Because diode is wanted the electric current of the about 10A of conducting in when work, can cause a large amount of hot stacks, produce higher temperature, along with the continuous rising of diode temperature, resistance in diode will constantly increase, cause diode to produce more heat, enter vicious circle thereby waste more electric power resource.Therefore, in order to ensure the reliably working of photovoltaic junction box, the temperature of diode can not be very high, and it is particularly important that overheat protector and warning seem.
Summary of the invention
For the problems referred to above of existing photovoltaic junction box, applicant, through Improvement, provides a kind of over-temperature condition indicator type photovoltaic junction box based on thermistor temperature detecting, realizes overheat protector and the warning of photovoltaic junction box.
Technical scheme of the present invention is as follows:
A kind of LED over-temperature condition indicator type photovoltaic junction box based on thermistor temperature detecting, comprise the upper cover and the base that mutually cover, between upper cover and base, form cavity, in described cavity, comprise diode string, photovoltaic cable interface, thermistor temperature detecting circuit module and LED over-temperature condition indicating circuit module; Described diode string comprises the diode of multiple series aiding connections, and the quantity of diode is identical with the quantity of photovoltaic cell, and with photovoltaic cell one by one correspondence be connected in parallel; Described photovoltaic cable interface has two, is connected to respectively the two ends of diode string; Described thermistor temperature detecting circuit module is connected on the circuit of the each diode in diode string, and for detecting the temperature of each diode, the output of described thermistor temperature detecting circuit module connects LED over-temperature condition indicating circuit module; Described LED over-temperature condition indicating circuit module connects the output of thermistor temperature detecting circuit module, comprises multiple LED instruction diodes, and described LED instruction diode is arranged on the upper cap surface of photovoltaic junction box.
Useful technique effect of the present invention is:
The present invention uses the temperature measurement circuit of thermistor to detect the temperature of diode string, increase on terminal box surface the LED being used to indicate, in the time that thermistor detects that diode temperature is too high, there is the state of temperature abnormality in the LED lamp instruction diode that starts terminal box surface, has realized monitoring temperature and the warning of photovoltaic junction box.
Advantage of the present invention will provide in the description of embodiment part below, and part will become obviously from the following description, or recognize by practice of the present invention.
Brief description of the drawings
Fig. 1 is electrical block diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further.
As shown in Figure 1, photovoltaic junction box of the present invention, by comprising diode string 1, photovoltaic cable interface 2, thermistor temperature detecting circuit module 3 and LED over-temperature condition indicating circuit module 4 in the cavity forming between upper cover and base.Diode string 1 comprises the diode of multiple series aiding connections, and the quantity of diode is identical with the quantity of photovoltaic cell 5, and with photovoltaic cell 5 one by one correspondence be connected in parallel.Two photovoltaic cable interfaces 2 are connected to respectively the two ends of diode string 1.Multiple thermistor temperature detecting circuit modules 3 are connected on the circuit of the each diode in diode string 1, and for detecting the temperature of each diode, the output of thermistor temperature detecting circuit module 3 connects LED over-temperature condition indicating circuit module 4.LED over-temperature condition indicating circuit module 4 connects the output of thermistor temperature detecting circuit module 3, comprises multiple LED instruction diodes, and LED instruction diode is arranged on the upper cap surface of photovoltaic junction box.In the time that thermistor temperature detecting circuit module 3 detects that this diode temperature is too high, corresponding LED instruction diode is lighted, and indicates which diode to cross temperature abnormality, realizes monitoring temperature and the warning of photovoltaic junction box.Thermistor temperature detecting circuit module 3 of the present invention and LED over-temperature condition indicating circuit module 4 are commercial goods.
Above-described is only the preferred embodiment of the present invention, the invention is not restricted to above embodiment.Be appreciated that the oher improvements and changes that those skilled in the art directly derive or associate without departing from the spirit and concept in the present invention, within all should thinking and being included in protection scope of the present invention.
Claims (1)
1. the over-temperature condition indicator type photovoltaic junction box based on thermistor temperature detecting, comprise the upper cover and the base that mutually cover, between upper cover and base, form cavity, it is characterized in that: in described cavity, comprise diode string (1), photovoltaic cable interface (2), thermistor temperature detecting circuit module (3) and LED over-temperature condition indicating circuit module (4); Described diode string (1) comprises the diode of multiple series aiding connections, and the quantity of diode is identical with the quantity of photovoltaic cell (5), and same photovoltaic cell (5) one by one correspondence be connected in parallel; Described photovoltaic cable interface (2) has two, is connected to respectively the two ends of diode string (1); Described thermistor temperature detecting circuit module (3) is connected on the circuit of the each diode in diode string (1), for detecting the temperature of each diode, the output of described thermistor temperature detecting circuit module (3) connects LED over-temperature condition indicating circuit module (4); Described LED over-temperature condition indicating circuit module (4) connects the output of thermistor temperature detecting circuit module (3), comprises multiple LED instruction diodes, and described LED instruction diode is arranged on the upper cap surface of photovoltaic junction box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410078390.4A CN103888055A (en) | 2014-03-05 | 2014-03-05 | Over-temperature state indication type photovoltaic junction box based on thermistor temperature measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410078390.4A CN103888055A (en) | 2014-03-05 | 2014-03-05 | Over-temperature state indication type photovoltaic junction box based on thermistor temperature measurement |
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| CN103888055A true CN103888055A (en) | 2014-06-25 |
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| CN201410078390.4A Pending CN103888055A (en) | 2014-03-05 | 2014-03-05 | Over-temperature state indication type photovoltaic junction box based on thermistor temperature measurement |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105093089A (en) * | 2015-09-11 | 2015-11-25 | 南通皋鑫电子股份有限公司 | High voltage diode over-temperature recovery capability detection method and system device thereof |
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| CN201773167U (en) * | 2010-08-23 | 2011-03-23 | 吕纪坤 | Photovoltaic component junction box sensing and detecting device |
| CN102386258A (en) * | 2010-09-02 | 2012-03-21 | 国琏电子（上海）有限公司 | Junction box and solar system |
| CN102723394A (en) * | 2012-06-29 | 2012-10-10 | 中国农业大学 | Junction box of photovoltaic assembly |
| CN102841301A (en) * | 2012-09-27 | 2012-12-26 | 常州旭能新能源科技有限公司 | Photovoltaic assembly monitoring system |
| CN103296112A (en) * | 2012-03-05 | 2013-09-11 | 上海捷波通信科技有限公司 | Junction box and intelligent motoring system of solar battery component |
| CN203827266U (en) * | 2014-03-05 | 2014-09-10 | 苏州边枫电子科技有限公司 | Over-temperature state indication type photovoltaic junction box based on thermistor temperature measurement |
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2014
- 2014-03-05 CN CN201410078390.4A patent/CN103888055A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201773167U (en) * | 2010-08-23 | 2011-03-23 | 吕纪坤 | Photovoltaic component junction box sensing and detecting device |
| CN102386258A (en) * | 2010-09-02 | 2012-03-21 | 国琏电子（上海）有限公司 | Junction box and solar system |
| CN103296112A (en) * | 2012-03-05 | 2013-09-11 | 上海捷波通信科技有限公司 | Junction box and intelligent motoring system of solar battery component |
| CN102723394A (en) * | 2012-06-29 | 2012-10-10 | 中国农业大学 | Junction box of photovoltaic assembly |
| CN102841301A (en) * | 2012-09-27 | 2012-12-26 | 常州旭能新能源科技有限公司 | Photovoltaic assembly monitoring system |
| CN203827266U (en) * | 2014-03-05 | 2014-09-10 | 苏州边枫电子科技有限公司 | Over-temperature state indication type photovoltaic junction box based on thermistor temperature measurement |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105093089A (en) * | 2015-09-11 | 2015-11-25 | 南通皋鑫电子股份有限公司 | High voltage diode over-temperature recovery capability detection method and system device thereof |
| CN105093089B (en) * | 2015-09-11 | 2018-02-27 | 南通皋鑫电子股份有限公司 | High-voltage diode excess temperature recovery capability detection method and its system and device |
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Application publication date: 20140625 |