CN211701963U

CN211701963U - Photovoltaic module's protector

Info

Publication number: CN211701963U
Application number: CN202020716998.6U
Authority: CN
Inventors: 邵波; 翟萌; 厉健
Original assignee: Zhejiang Astronergy New Energy Development Co Ltd
Current assignee: Zhejiang Astronergy New Energy Development Co Ltd
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2020-10-16
Anticipated expiration: 2030-04-30

Abstract

The utility model discloses a photovoltaic module's protector, including the protective sheath, the protective sheath is established in the periphery that MC4 connects to avoid ultraviolet ray and rainwater direct and MC4 to connect the contact, and then avoided MC4 to connect and take place ageing or take place the short circuit because of the rainwater infiltration because of the radiation. In addition, the two ends of the protective sleeve are provided with fixing clamps, and the male connector and the female connector of the MC4 connector are connected in the protective sleeve and then are provided with the fixing clamps at the two ends of the protective sleeve, so that the MC4 connector is limited and prevented from sliding out of the protective sleeve.

Description

Photovoltaic module's protector

Technical Field

The utility model relates to a photovoltaic power generation technical field, in particular to photovoltaic module's protector.

Background

With the strong support of the state on the photovoltaic industry, the development of photovoltaic products is gradually diversified and the development of photovoltaic products is in the aspect of life. At present, a photovoltaic direct-current wiring mode mainly adopts butt joint of MC4 male and female connectors, and if the joint of MC4 is in poor lap joint, the risks of arc discharge and short circuit exist among photovoltaic modules, and even a fire disaster can be caused in serious conditions. The existing MC4 joint is exposed to the external environment, ultraviolet radiation causes aging of the MC4 joint, once rainwater permeates into the MC4 joint, the problem of soaking short circuit is caused, and the heating risk of the MC4 joint is further increased.

Therefore, how to protect the MC4 joint from fire caused by its heat generation is a technical problem that needs to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a photovoltaic module's protector, it is established at MC4 joint periphery through the protective sleeve cover, has avoided radiation MC4 to suffer ultraviolet ray and rainwater infiltration, connects for MC4 and provides protection effectively.

In order to achieve the above object, the utility model provides a photovoltaic module's protector, locate the protective casing that MC4 connects the periphery including the cover, protective casing both ends are equipped with the fixing clip that is used for fixed MC4 to connect, the fixing clip with protective casing detachably connects.

Preferably, the protective sleeve is connected with a guide rail for supporting the photovoltaic module.

Preferably, the temperature measuring mechanism is used for measuring the temperature of the MC4 joint and comprises a temperature sensor and a power distribution box used for supplying power to the temperature sensor.

Preferably, the temperature sensor is disposed in the protective sleeve.

Preferably, a photovoltaic controller connected with the temperature sensor is arranged in the distribution box, and the photovoltaic controller is further connected with a photovoltaic assembly to supply power to the temperature sensor.

Preferably, a circuit breaker is further arranged between the photovoltaic controller and the temperature sensor.

Preferably, the photovoltaic controller is also connected with a storage battery.

Preferably, the device further comprises an alarm which is connected with the photovoltaic controller and used for giving an alarm when the temperature of the MC4 joint is higher than a preset temperature.

Preferably, the temperature sensor is further connected with a string inverter or a direct current combiner box.

The utility model provides a photovoltaic module's protector includes the protective sheath, and protective sheath establishes in the periphery that MC4 connects to avoid ultraviolet ray and rainwater direct and MC4 to connect the contact, and then avoided MC4 to connect and take place ageing or take place the short circuit because of the rainwater infiltration because of the radiation. In addition, the two ends of the protective sleeve are provided with fixing clamps, and the male connector and the female connector of the MC4 connector are connected in the protective sleeve and then are provided with the fixing clamps at the two ends of the protective sleeve, so that the MC4 connector is limited and prevented from sliding out of the protective sleeve.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural view of a protective device connected to a photovoltaic module according to an embodiment of the present invention;

FIG. 2 is a top view of the photovoltaic module of FIG. 1;

fig. 3 is an enlarged view of a in fig. 2.

Wherein the reference numerals in fig. 1 to 3 are:

photovoltaic module 1, guide rail 2, photovoltaic terminal box 3, lag tube 4, fixing clip 5, cable 6, MC4 joint 7, temperature sensor 8, block terminal 9, battery 91, photovoltaic controller 92, circuit breaker 93.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In order to make the technical field of the present invention better understand, the present invention will be described in detail with reference to the accompanying drawings and the detailed description.

Referring to fig. 1 to 3, fig. 1 is a schematic structural view illustrating a protective device connected to a photovoltaic module according to an embodiment of the present invention; FIG. 2 is a top view of the photovoltaic module of FIG. 1; fig. 3 is an enlarged view of a in fig. 2.

The utility model provides a photovoltaic module's protector includes protective casing 4 and fixing clip 5, as shown in fig. 3, protective casing 4 cover is established in the periphery that MC4 connects 7, and fixing clip 5 connects 7 from both ends to MC4 and carries on spacingly, avoids it to follow roll-off in the protective casing 4. Specifically, the optional ceramic bushing of protective sheath 4, ceramic bushing can bear higher temperature, and the higher ceramic bushing of messenger MC4 joint 7 temperature can not damage promptly, avoids leading to the protection inefficacy because of protective sheath 4 damages. The fixing clip 5 has a through hole through which the cable 6 of the photovoltaic junction box 3 passes, and the diameter of the through hole is smaller than that of the MC4 joint 7. The fixing clip 5 and the ceramic sleeve can be detachably connected through interference fit or clamping fit and the like.

In addition, the mass of one end of the MC4 joint 7 is increased due to the protection sleeve 4, which also causes the photovoltaic junction box 3 to bear larger tensile stress, and the connection point of the cable 6 and the diode and other components in the photovoltaic junction box 3 is easy to be welded after being stressed for a long time. Thus, in one embodiment of the present application, the protective sleeve 4 is connected to the rail 2 supporting the photovoltaic module 1 by means of bonding or snapping or the like. Since the guide rail 2 is usually made of metal, the protection sleeve 4 is connected to the guide rail 2, so that heat of the MC4 joint 7 can be transferred to the guide rail 2, and heat dissipation is further increased.

In this embodiment, protector establishes the protective sheath 4 at MC4 joint 7 periphery including the cover, and protective sheath 4 forms to cover MC4 joint 7, avoids MC4 to connect 7 ageing or infiltration rainwater, and then avoids MC4 to connect 7 because of contact resistance increase or short circuit lead to generating heat and increase.

Optionally, the protection device further comprises a temperature measuring mechanism, wherein the temperature measuring mechanism is used for measuring the temperature of the MC4 joint 7, so that even if an operator finds that the temperature of the MC4 joint 7 is too high, the temperature is treated, and the occurrence of fire accidents is avoided. The temperature measuring mechanism comprises a temperature sensor 8 and a distribution box 9, the temperature sensor 8 can be arranged on the protective sleeve 4 or the guide rail 2, and the temperature of the MC4 joint 7 can be deduced according to the temperature on the protective sleeve 4 or the guide rail 2. The distribution box 9 is used for supplying power to the temperature sensor 8. In a specific embodiment of this application, temperature sensor 8 sets up in protective sheath 4, and the reservation has the via hole that supplies temperature sensor 8 wire to pass on fixing clip 5 to make temperature sensor 8 can link to each other with block terminal 9.

Optionally, a photovoltaic controller 92 is arranged in the distribution box 9, the photovoltaic controller 92 is connected with the photovoltaic module 1, and the electric energy generated by the photovoltaic module 1 is transmitted to the temperature sensor 8, so that the photovoltaic module 1 can supply power to the temperature sensor 8, and the distribution box 9 does not need an external power supply.

Further, a storage battery 91 is further arranged in the distribution box 9, and the storage battery 91 is connected with the photovoltaic controller 92. After the stable dc power is shunted by the photovoltaic controller 92, a part of the dc power is stored in the battery 91 for use at night and for standby power, and a part of the dc power is supplied to the temperature sensor 8 for operation. In addition, still be equipped with circuit breaker 93 between photovoltaic controller 92 and the temperature sensor 8, circuit breaker 93 is used for controlling temperature sensor 8's power to open and stop, is convenient for manage and operation maintenance. The battery 91 may be a lithium battery, and certainly, the user may select other batteries according to the need, which is not limited herein.

Further, protector still includes the alarm, and the alarm links to each other with photovoltaic controller 92, by the power supply of photovoltaic controller 92, and when the temperature of MC4 joint 7 was higher than preset temperature, the alarm sent alarm signal, reminds operating personnel to handle MC4 joint 7, avoids causing the conflagration.

Furthermore, the temperature sensor 8 can be connected with a string inverter or a dc combiner box, and when the temperature of the MC4 joint 7 is higher than a preset temperature, the circuit where the photovoltaic module 1 is located is directly disconnected through the string inverter or the dc combiner box, so as to avoid fire. Certainly, the alarm temperature can be set to be a first preset temperature, the temperature of the circuit where the photovoltaic module 1 is disconnected is a second preset temperature, and the second preset temperature is higher than the first preset temperature, so that if the temperature of the MC4 joint 7 is too high and is not handled by people for a long time, a fire disaster is prevented by disconnecting the circuit where the photovoltaic module 1 is located, and the safety of photovoltaic power generation is improved.

In this embodiment, protector includes temperature measurement mechanism, and temperature measurement mechanism can direct or indirect measurement MC4 joint 7's temperature, and once the temperature of MC4 joint 7 is too high then the suggestion operating personnel handles this joint, has greatly reduced the possibility that the conflagration takes place.

It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.

It is right above the utility model provides a photovoltaic module's protector has carried out detailed introduction. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. The protective device for the photovoltaic module is characterized by comprising a protective sleeve (4) sleeved on the periphery of a joint (7) of an MC4, wherein fixing clamps (5) used for fixing the joint (7) of the MC4 are arranged at two ends of the protective sleeve (4), and the fixing clamps (5) are detachably connected with the protective sleeve (4).

2. Protection device according to claim 1, characterized in that said protective casing (4) is associated with a rail (2) for supporting a photovoltaic module (1).

3. Guard according to any of claims 1 or 2, characterized in that it further comprises a temperature measuring mechanism to measure the temperature of the MC4 joint (7), said temperature measuring mechanism comprising a temperature sensor (8) and an electric box (9) to supply said temperature sensor (8).

4. Protection device according to claim 3, characterized in that said temperature sensor (8) is arranged in said protective sheath (4).

5. Protection device according to claim 4, characterized in that a photovoltaic controller (92) connected to said temperature sensor (8) is provided in said electric box (9), said photovoltaic controller (92) being also connected to a photovoltaic module (1) for supplying said temperature sensor (8) with electricity.

6. Protection device according to claim 5, characterized in that a circuit breaker (93) is also provided between the photovoltaic controller (92) and the temperature sensor (8).

7. Protection device according to claim 5, characterized in that a storage battery (91) is also connected to said photovoltaic controller (92).

8. The protection device according to claim 5, characterized in that it further comprises an alarm connected to said photovoltaic controller (92) for giving an alarm when the temperature of the MC4 junction (7) is higher than a preset temperature.

9. The protection device according to claim 5, characterized in that the temperature sensor (8) is also connected to a string inverter or a DC combiner box.