CN220629295U - Photovoltaic module terminal box shell, water surface photovoltaic module and terminal box thereof - Google Patents

Abstract

The utility model relates to a photovoltaic module junction box shell, wherein a first side face of the photovoltaic module junction box shell and the bottom face of the photovoltaic module junction box shell form a first included angle, a second side face of the photovoltaic module junction box shell and the bottom face of the photovoltaic module junction box shell form a second included angle, and the first included angle and the second included angle are matched with a solar altitude angle of a preset use place, so that shadows generated by the photovoltaic module junction box shell under solar irradiation are reduced. In addition, the utility model further provides a water surface photovoltaic module junction box comprising the photovoltaic module junction box shell and a water surface photovoltaic module comprising the water surface photovoltaic module junction box. According to the utility model, on the basis of the prior art, the shadow generated under the irradiation of sunlight when the junction box of the water surface photovoltaic module is arranged at a preset use place is reduced, and the hot spot effect generated by the battery piece of the photovoltaic module is reduced, so that the service life of the battery piece can be prolonged.

Description

Photovoltaic module terminal box shell, water surface photovoltaic module and terminal box thereof

Technical Field

The utility model relates to a junction box, in particular to a photovoltaic module junction box shell. Further, the utility model relates to a water surface photovoltaic module junction box comprising the photovoltaic module junction box shell, and further relates to a water surface photovoltaic module comprising the water surface photovoltaic module junction box.

Background

The photovoltaic module is a power generation device capable of generating direct current when being exposed to sunlight, and is a product formed by connecting a plurality of photovoltaic cells in series-parallel connection and then packaging. The photovoltaic module junction box is a key device for introducing electric energy generated by a photovoltaic cell into a power supply system. The water surface photovoltaic module has the advantages of land saving, good cooling effect, convenient operation and maintenance and the like as an important application direction of the photovoltaic module. The prior art CN201922391958.9 discloses a junction box for solar photovoltaic modules, as shown in fig. 1, two ends of the inside of a housing are respectively fixed with conductive terminals 100, two ends of each conductive terminal 100 are respectively connected with bus bars 101, the end of each bus bar 101 is assembled with a connector 102, a diode 103 is welded and fixed between the two conductive terminals 100, and the junction box is connected with a photovoltaic module through the connector 102. The solar photovoltaic module junction box introduces electric energy generated by the water surface photovoltaic module into a power supply system through a bus bar 101 connected with a connector 102. However, the junction box is designed based on the use purpose of the overground photovoltaic module, the junction box of the water surface photovoltaic module cannot be arranged on the backlight surface of the photovoltaic module like the junction box of the overground photovoltaic module, the junction box arranged on the backlight surface has the risks of connecting pieces and cable breakage under the influence of long-term wind blowing, the junction box falls into water, and the water is possibly electrified, so that dangerous accidents such as electric shock or power station abnormality are caused. For safety reasons, the junction box of the water surface photovoltaic module in the prior art is generally disposed on the front surface (i.e. the surface provided with the battery piece) of the water surface photovoltaic module, as shown in fig. 2, in the use of the water surface photovoltaic module, since the junction box is disposed in the bus bar area where the battery piece is not laid on the front surface of the photovoltaic module, the junction box can generate shadows with a certain area to block the photovoltaic module under the irradiation of sunlight with different angles by the photovoltaic module junction box housing 104. The shielded photovoltaic module consumes energy generated by other illuminated solar cell modules, so that the shielded photovoltaic module generates heat. The hot spot effect can seriously damage the solar cell and influence the service life of the photovoltaic module.

In view of the foregoing, there is a need to design a junction box for a water surface photovoltaic module that overcomes the above-mentioned technical problems and effectively solves or alleviates the above-mentioned technical drawbacks.

Disclosure of Invention

The utility model aims to solve the technical problem of providing the photovoltaic module junction box shell, which can effectively reduce the hot spot effect generated by the battery piece of the photovoltaic module when the photovoltaic module junction box shell is used at a proper use place, so that the service life of the battery piece can be prolonged.

Further, the technical problem to be solved is to provide a water surface photovoltaic module junction box, and the water surface photovoltaic module junction box can effectively reduce the hot spot effect generated by the battery piece of the photovoltaic module when being used at a proper use place, so that the service life of the battery piece can be prolonged.

Still further, the technical problem to be solved is to provide a surface of water photovoltaic module, and this surface of water photovoltaic module can reduce the battery piece of photovoltaic module and produce hot spot effect when suitable use place uses to can prolong battery piece life.

In order to achieve the above object, according to one aspect of the present utility model, there is provided a photovoltaic module junction box housing, including a photovoltaic module junction box housing and a photovoltaic module junction box housing cover, wherein a first side of the photovoltaic module junction box housing forms a first included angle with a bottom surface of the photovoltaic module junction box housing, and a second side of the photovoltaic module junction box housing forms a second included angle with the bottom surface of the photovoltaic module junction box housing, and the first included angle and the second included angle are configured to cooperate with a solar altitude angle of a preset use place, so that shadows generated by the photovoltaic module junction box housing under solar irradiation are reduced.

Specifically, the cross section of the photovoltaic module junction box shell is triangular or trapezoid.

Preferably, the angle of the first side surface of the cover of the junction box of the photovoltaic module and the angle of the bottom surface are equal to the angle of the first included angle, and the angle of the second side surface of the cover and the bottom surface are equal to the angle of the second included angle.

Preferably, the angle of the first included angle is less than or equal to the maximum value of the solar altitude angle in one year of the corresponding latitude of the preset use place of the photovoltaic module junction box shell, and the angle of the second included angle is less than or equal to the minimum value of the solar altitude angle in one year of the corresponding latitude of the preset use place of the photovoltaic module junction box shell.

Preferably, the first side surface and the second side surface of the cover are respectively provided with a flange stop part with a stop step surface, the first side surface and the second side surface are respectively provided with a flange stop part with a stop step surface, and the stop step surface mutually stop

On the basis of the technical scheme of the photovoltaic module junction box shell, the utility model further provides a water surface photovoltaic module junction box, wherein the water surface photovoltaic module junction box comprises the photovoltaic module junction box shell of any one of the technical scheme.

Preferably, the water surface photovoltaic module junction box comprises a conductive terminal and a bus bar, wherein the conductive terminal is respectively fixed at two ends of the inside of the photovoltaic module junction box shell, the conductive terminal comprises a hole, and the bus bar passes through the conductive terminal through the hole and is bent and soldered.

Preferably, the water surface photovoltaic module junction box comprises a heat conduction waterproof structure, and the heat conduction waterproof structure can prevent water vapor from entering the junction box.

Specifically, the heat-conducting waterproof structure comprises pouring sealant, and the pouring sealant is used for pouring and sealing the inside of the junction box of the water surface photovoltaic module.

On the basis of the technical scheme of the water surface photovoltaic module junction box, the utility model further provides a water surface photovoltaic module, wherein the water surface photovoltaic module comprises the water surface photovoltaic module junction box of any one of the technical scheme, and the water surface photovoltaic module junction box is arranged in a bus bar area of the front surface of the water surface photovoltaic module, where no battery piece is paved.

Through the technical scheme, the photovoltaic module junction box shell is originally provided with the shadow generated by the photovoltaic module junction box under the irradiation of the sun when being arranged at the preset use place by changing the included angles between the first side surface and the second side surface of the photovoltaic module junction box shell and the bottom surface of the photovoltaic module junction box shell. Furthermore, the photovoltaic module junction box shell can be arranged at a preset use place, and almost no shadow is generated under the irradiation of the sun no matter how the sun angle changes in one year. Furthermore, the junction box for the water surface photovoltaic module reduces the contact surface resistance by soldering the bus bar and the electric conductor, and the junction box comprises a heat conduction waterproof structure, so that the junction box can play a role in heat dissipation while being waterproof. In addition, the volumes of the radiating copper sheets and the junction box of the water surface photovoltaic module are reduced, so that the cost is reduced.

Drawings

Fig. 1 is a block diagram of a prior art junction box for a photovoltaic module.

Fig. 2 is a schematic view of a prior art photovoltaic module junction box under sunlight.

Fig. 3 is a cross-sectional view of an embodiment of a junction box for a water-surface photovoltaic module of the present utility model.

Fig. 4 is a schematic view of a photovoltaic module junction box housing of the present utility model used in a 0 deg. latitude area under winter sun illumination.

Fig. 5 is a schematic view of a photovoltaic module junction box housing of the present utility model used in a 0 ° latitude area under summer sun illumination.

Fig. 6 is a schematic structural view of a photovoltaic module junction box according to an embodiment of the present utility model.

Fig. 7 is a schematic longitudinal section of a photovoltaic module junction box according to an embodiment of the present utility model.

Description of the reference numerals

1 photovoltaic module terminal box casing 2 photovoltaic module terminal box cap

3 first side 4 second side

5 first included angle of bottom surface 6

7 second included angle 8 first side of the shell cover

9 second side 10 stop step of the cover

11 flange stop 12 limit step surface

13 flange limit part 14 conductive terminal

15 solder pre-storage 16 holes

17 diode 18 reference column

19 positioning holes D1 first direction

D2 second direction

Detailed Description

The following describes specific embodiments of the present utility model in detail with reference to the drawings. It is to be understood that the embodiments described herein are for purposes of illustration and explanation only, and the scope of the present utility model is not limited to the following embodiments.

In the present utility model, unless specifically stated otherwise, terms such as "first," "second," and the like are used for distinguishing one element from another, and are not sequential or important, and do not limit the scope of the present utility model. In the present utility model, without specific description, it will be appreciated by those skilled in the art that the front surface of the photovoltaic module is the surface on which the photovoltaic module lays the battery sheet, and will not be described in detail.

As shown in fig. 3, a first included angle 6 is formed between a first side surface 3 of a photovoltaic module junction box shell 1 of the photovoltaic module junction box shell and a bottom surface 5 of the photovoltaic module junction box shell 1, a second included angle 7 is formed between a second side surface 4 of the photovoltaic module junction box shell 1 and the bottom surface 5 of the photovoltaic module junction box shell 1, and when the photovoltaic module junction box shell is arranged at a preset use place, the photovoltaic module junction box shell is arranged in a bus bar area where no battery piece is paved, wherein a first direction D1 is an east-west direction, and a second direction D2 is a north-south direction. The solar shadow in east-west direction is generated by the photovoltaic module junction box due to the change of the sun from east to west in one day, and the battery piece is not arranged in east-west direction of the photovoltaic module junction box, so that the shadow generated by the change of the position of the sun in one day cannot fall into the battery piece. The movement of the solar direction in the north-south direction in one year can lead the photovoltaic module junction box to generate shadow in the south-north direction, but the photovoltaic module junction box can not generate shadow in the south-north direction through the first included angle 6 and the second included angle 7, the solar height angle of the preset use place is larger than or equal to the angle of the second included angle 7 and is smaller than or equal to (180 ° -the angle of the first included angle 6), so that the generation of the hot spot phenomenon of the photovoltaic module is reduced, and the service life of the module is prolonged.

As a further specific mode, referring to fig. 3, the cross section of the photovoltaic module junction box housing is triangular, trapezoid or calculated special shape, and the cross section of the photovoltaic module junction box housing of the present utility model may be various, so long as the first direction D1 is the east-west direction, and the second direction D2 is the north-south direction, when the photovoltaic module junction box housing is set in the busbar area of the preset use place, the angle of the solar altitude of the preset use place in one year is greater than or equal to the angle of the second angle 7 and is less than or equal to (180 ° -the angle of the first angle 6), and no shadow is generated in the north-south direction during the period of the solar altitude of the preset use place, which is not repeated herein.

As a preferred structural form, referring to fig. 3, the angle between the first side 8 and the bottom 5 of the cover 2 of the photovoltaic module junction box is equal to the angle between the first side 6 and the bottom 5, the angle between the second side 9 and the bottom 5 is equal to the angle between the second side 7, the first side 8 and the second side 9 of the cover 2 of the photovoltaic module junction box are respectively attached to the first side 3 and the second side 4 of the housing 1 of the photovoltaic module junction box, the first side 8 and the second side 9 of the cover are respectively attached to the first and the second sides of the cover formed by the bottom 5, the angles between the first and the second sides of the cover are the same, the angles of the second included angle and the second included angle 7 of the shell cover are the same, so that the photovoltaic module junction box shell cover 2 cannot generate shadows in the north-south direction during the period from the angle of the solar altitude angle of the preset use place to the angle of the solar altitude angle of the preset use place which is not less than the second included angle 7 in one year to the angle of the solar altitude angle of the preset use place which is not more than (180 ° -the angle of the first included angle 6) through the first included angle of the shell cover and the second included angle of the shell cover when the photovoltaic module junction box shell is arranged at the preset use place, and shadows in the north-south direction generated by the photovoltaic module junction box shell cover 2 are reduced.

As a preferred structural form, referring to fig. 3, the angle of the first included angle 6 is less than or equal to 180 ° and less than the maximum value of the solar altitude angle in one year of the corresponding latitude of the preset use place of the photovoltaic module junction box housing, the angle of the second included angle 7 is less than or equal to the minimum value of the solar altitude angle in one year of the corresponding latitude of the preset use place of the photovoltaic module junction box housing, and when the photovoltaic module junction box housing is arranged at the preset use place, the photovoltaic module junction box housing is arranged in a bus bar area where no battery piece is laid, and the first direction D1 is the east-west direction and the second direction D2 is the north-south direction. The solar change from east to west in the day makes this photovoltaic module terminal box produce the shade in east-west direction, and this photovoltaic module terminal box's east-west direction does not set up the battery piece to the shade that solar change in the day produced can not fall into the battery piece, and then reduces the production of photovoltaic module hot spot phenomenon, improves the subassembly life-span. The solar altitude angle of the solar module is not less than the angle of the first included angle 6 and not more than (180 ° -the angle of the second included angle 7) no matter how the solar module moves in the north-south direction in one year, so that shadows can not be generated no matter how the solar module junction box shell is irradiated in the north-south direction in one year, and further, the photovoltaic module junction box shell can hardly generate shadows on the battery piece under the sun irradiation when being arranged at a preset use place, and the generation of the hot spot phenomenon of the photovoltaic module is reduced. As long as the angle of the first included angle 6 is less than or equal to 180 degrees, the maximum value of the solar altitude angle in one year of the corresponding latitude of the preset use place of the photovoltaic module junction box shell is reduced, and the angle of the second included angle 7 is less than or equal to the minimum value of the solar altitude angle in one year of the corresponding latitude of the preset use place of the photovoltaic module junction box shell, no shadow can be generated on the battery piece no matter how the solar altitude angle changes in one year when the solar altitude angle is arranged at the preset use place.

As a preferred embodiment, see fig. 3, the first side 8 and the second side 9 of the cover are each provided with a flange stop 11 having a stop step 10, and the first side 3 and the second side 4 are each provided with a flange stop 13 having a stop step 12, the stop step 10 and the stop step 12 stopping against each other. The flange stop part 11 and the flange limit part 13 can prevent the photovoltaic module junction box shell 1 and the photovoltaic module junction box shell cover 2 from being separated under the condition of being influenced by strong wind or being touched by human beings or animals by mistake, thereby preventing the direct exposure of components inside the photovoltaic module junction box from causing the functional failure of the photovoltaic module junction box, and prolonging the service life of the water surface photovoltaic module junction box.

On the basis of the photovoltaic module junction box shell in the technical scheme, the utility model further provides the water surface photovoltaic module junction box. As shown in fig. 6 and 7, the water surface photovoltaic module junction box of the present utility model includes conductive terminals 14 and bus bars, the conductive terminals 14 are respectively fixed at both ends of the inside of the photovoltaic module junction box case 1, the conductive terminals 14 include holes 16, and the bus bars pass through the conductive terminals 14 through the holes 16 and are bent and soldered. The conductive terminals 14 and the bus bars are soldered, so that the contact area between the bus bars and the conductive terminals 14 can be increased, the contact surface resistance can be reduced, and the power transmission efficiency of the water surface photovoltaic module junction box can be effectively improved.

As a preferred structural style, surface of water photovoltaic module includes heat conduction waterproof construction, and surface of water photovoltaic module installs in moist environment, and steam entering surface of water photovoltaic module terminal box inside can lead to producing electric arc between the electric conductor of terminal box inside, and heat conduction waterproof construction can prevent steam entering terminal box inside, and then prevents that electric arc from producing. The realization mode of heat conduction waterproof construction is various, can use the pouring sealant embedment or use the waterproof adhesive of heat conduction to fill water face photovoltaic module terminal box shell gap or make the inside surface cladding heat conduction waterproof material that needs waterproof part of water face photovoltaic module terminal box, as long as can prevent that steam from getting into inside the influence electric conductor of terminal box can, unnecessary here. Because the water surface photovoltaic module junction box with the preferred design is adopted by the first included angle 6 and the second included angle 7, the volume of the water surface photovoltaic module junction box is maximum while no shadow is generated, compared with the prior art, the water surface photovoltaic module junction box has larger volume for accommodating radiating copper sheets and has stronger radiating capability, but the water surface photovoltaic module junction box has higher humidity of application environment and low requirement on radiating capability, so that in practical application, the area of the copper sheets and the volume of the junction box can be properly reduced on the premise of meeting the requirement on the radiating capability of the junction box, thereby reducing the cost of the water surface photovoltaic module junction box with the preferred design or further prolonging the time of the shadow which is not generated by the water surface photovoltaic module junction box with the non-preferred design while reducing the cost.

On the basis of the junction box of the water surface photovoltaic module, which is provided by the technical scheme of the utility model, the utility model further provides the water surface photovoltaic module. The water surface photovoltaic module is used for transmitting electric energy outwards through the water surface photovoltaic module junction box, the water surface photovoltaic module junction box is arranged in a bus bar area of the water surface photovoltaic module, the battery piece is not paved, the first direction D1 of the water surface photovoltaic module junction box is the east-west direction, the second direction D2 of the water surface photovoltaic module junction box is the north-south direction, and therefore hot spot effect generated by the battery piece is reduced, and the service life of the water surface photovoltaic module is prolonged.

As shown in fig. 3, the utility model provides a water surface photovoltaic module junction box which is preferably used in a region with 0 degree latitude, the cross section of the water surface photovoltaic module junction box is isosceles trapezoid, the angles of a first included angle 6 and a second included angle 7 are 66 degrees 34', the junction box is arranged in a bus bar area where no battery piece is paved according to the first direction D1 being the east-west direction and the second direction D2 being the north-south direction in actual use, no matter how the sun changes in the east-west direction in one day, shadows of the junction box in the east-west direction generated under the irradiation of the sun fall in the bus bar area where no battery piece is paved, and therefore the junction box cannot generate shadows on the battery piece due to the change of the east-west direction of the sun. The solar altitude angle range in the latitude 0 degree region is as follows: winter to 66 deg. 34 '-summer to 113 deg. 26'. As shown in fig. 4 and 5, the solar altitude in the 0 ° region of the summer solstice is equal to (180 ° -the angle of the first included angle 6), the solar altitude in the 0 ° region of the winter solstice is equal to the angle of the second included angle 7, the water surface photovoltaic module junction box does not generate shadows in the north-south directions in the summer solstice and the winter solstice, the solar altitude in other times in the 0 ° region is larger than the angle of the second included angle 7 and smaller than the angle of 180 ° -the angle of the first included angle 6, no matter how the preferred photovoltaic module junction box shell 1 moves in the north-south direction in one year of the sun, and therefore shadows are not generated on the battery pieces under the irradiation of sunlight when the preferred photovoltaic module junction box shell 1 is arranged in the 0 ° region of the summer solstice, and thus the generation of the hot spot effect is prevented. The first side 8 and the second side 9 of the cover 2 of the photovoltaic module junction box are respectively attached to the first side 6 and the second side 7, and the included angles formed by the first side 8 and the second side 9 of the cover and the ground 5 are respectively the angles of the first included angle 6 and the second included angle 7, so that shadows can not be generated in the north-south direction in one year of the cover 2 of the photovoltaic module junction box, meanwhile, the shadows in the east-west direction of the cover 2 of the photovoltaic module junction box fall in the busbar area where no battery piece is paved, and then the shadows can not be generated on the battery piece when the cover 2 of the photovoltaic module junction box is arranged in the area with the latitude of 0 degrees under the irradiation of sunlight, so that the hot spot effect is prevented. The first side surface 8 and the second side surface 9 of the shell cover are respectively provided with a flange stop part 11 with a stop step surface 10, the first side surface 3 and the second side surface 4 are respectively provided with a flange stop part 13 with a stop step surface 12, and the stop step surface 10 and the stop step surface 12 are mutually stopped. The flange stop part 11 and the flange limit part 13 can prevent the separation of the photovoltaic module junction box shell cover 2 from the photovoltaic module junction box shell 1 in windy weather or mistaken touch of human beings or animals while being convenient to install, thereby preventing the elements inside the photovoltaic module junction box from being directly exposed outside and prolonging the service life of the photovoltaic module junction box. The water surface photovoltaic module junction box comprises conductive terminals 14, diodes 17, positioning columns 18 and bus bars, wherein the conductive terminals 14 comprise soldering tin pre-storage parts 15, holes 16 and positioning holes 19, the positioning columns 18 at two ends of the inside of the photovoltaic module junction box shell 1 penetrate through the positioning holes 19 of the two conductive terminals 14 respectively, the two conductive terminals 14 are fixed at two ends of the water surface photovoltaic module junction box respectively, the two conductive terminals 14 are connected through the diodes 17, soldering tin is attached to the soldering tin pre-storage parts 15, the bus bars penetrate through the conductive terminals 14 through the holes 16 and are attached to the soldering tin pre-storage parts 15 after being bent, the bus bars and the soldering tin pre-storage parts 15 are welded through high-temperature soldering, and the contact area between the bus bars and the soldering tin pre-storage parts 15 can be increased through soldering, and the contact surface resistance can be reduced. The inside of this preferred surface of water photovoltaic module terminal box forms the pouring sealant layer with heat conduction pouring sealant embedment, and this pouring sealant layer can play the heat dissipation effect when preventing that steam from getting into. Because this surface of water photovoltaic module terminal box environmental humidity is great when using, and the heat dissipation ability requirement of butt joint line box is not high, this surface of water photovoltaic module terminal box reduces copper sheet area and terminal box volume in the terminal box to reduce the shadow area that the terminal box produced in the reduce cost.

As can be seen from the above description, the present utility model has the advantages that, first, by controlling the angles of the first included angle 6 and the second included angle 7, the shadow generated by the photovoltaic module junction box under the irradiation of the sun when the photovoltaic module junction box housing is arranged at the preset use place can be reduced, and the hot spot effect generated by the battery piece can be reduced. Furthermore, according to the junction box for the water surface photovoltaic module, provided by the utility model, when the junction box shell is arranged at a preset use place, no matter how the solar angle changes in one year, shadows can be hardly generated on the battery piece under the irradiation of the sun, so that the hot spot effect is prevented. Third, the photovoltaic module junction box shell is provided with the flange stop part 11 and the flange stop part 13, so that the photovoltaic module junction box shell cover 2 is prevented from being separated from the photovoltaic module junction box shell 1 in windy weather or mistaken touch of human beings or animals while the installation is convenient, elements inside the photovoltaic module junction box are prevented from being directly exposed, and the service life of the photovoltaic module junction box is prolonged. Fourth, the water surface photovoltaic module junction box reduces contact surface resistance by soldering the bus bars and the conductors, and increases power transmission efficiency of the water surface photovoltaic module junction box. Fifth, the junction box of the water surface photovoltaic module comprises a heat conduction waterproof structure, and can play a role in heat dissipation while being waterproof. Sixth, compared with the prior art, the photovoltaic module junction box shell reduces the volume to avoid the hot spot effect, and then increases heat dissipation as much as possible in a limited space.

The preferred embodiments of the present utility model have been described in detail above with reference to the accompanying drawings, but the present utility model is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present utility model within the scope of the technical concept of the present utility model, and all the simple modifications belong to the protection scope of the present utility model.

In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. The various possible combinations of the utility model are not described in detail in order to avoid unnecessary repetition.

Moreover, any combination of the various embodiments of the utility model can be made without departing from the spirit of the utility model, which should also be considered as disclosed herein.

Claims (10)

1. The utility model provides a photovoltaic module terminal box shell, includes photovoltaic module terminal box casing (1) and photovoltaic module terminal box cap (2), its characterized in that, first side (3) of photovoltaic module terminal box casing (1) with bottom surface (5) of photovoltaic module terminal box casing (1) form first contained angle (6), second side (4) of photovoltaic module terminal box casing (1) with bottom surface (5) of photovoltaic module terminal box casing (1) form second contained angle (7), and this first contained angle (6) and second contained angle (7) set up to cooperate with the sun altitude angle of default place of use, so that the shadow that photovoltaic module terminal box shell produced under the sun shines reduces.

2. The photovoltaic module junction box housing of claim 1 wherein the cross section of the photovoltaic module junction box housing is triangular or trapezoidal.

3. The photovoltaic module junction box housing according to claim 2, characterized in that the angle of the housing cover first side (8) of the photovoltaic module junction box housing cover (2) with the bottom surface (5) is equal to the angle of the first angle (6), and the angle of the housing cover second side (9) with the bottom surface (5) is equal to the angle of the second angle (7).

4. A photovoltaic module junction box housing according to any one of claims 1 to 3, characterized in that the angle of the first included angle (6) is 180 ° or less minus the maximum value of the solar altitude in one year of the corresponding latitude of the photovoltaic module junction box housing preset point of use, and the angle of the second included angle (7) is less than or equal to the minimum value of the solar altitude in one year of the corresponding latitude of the photovoltaic module junction box housing preset point of use.

5. The photovoltaic module junction box housing according to claim 4, characterized in that flange stop portions (11) with stop step surfaces (10) are arranged on the first side surface (8) and the second side surface (9) of the housing cover, flange stop portions (13) with stop step surfaces (12) are arranged on the first side surface (3) and the second side surface (4), and the stop step surfaces (10) and the stop step surfaces (12) are mutually stopped.

6. A water surface photovoltaic module junction box, characterized in that the casing of the water surface photovoltaic module junction box is the photovoltaic module junction box casing according to any one of claims 1 to 5.

7. The water surface photovoltaic module junction box according to claim 6, characterized in that the water surface photovoltaic module junction box comprises conductive terminals (14) and bus bars, the conductive terminals (14) are respectively fixed at two inner ends of the photovoltaic module junction box housing (1), the conductive terminals (14) comprise holes (16), and the bus bars pass through the conductive terminals (14) through the holes (16) and are bent and soldered.

8. The water surface photovoltaic module junction box of claim 6, wherein the water surface photovoltaic module junction box comprises a thermally conductive waterproof structure capable of preventing moisture from entering the interior of the junction box.

9. The water surface photovoltaic module junction box of claim 8, wherein the thermally conductive waterproof structure comprises a potting adhesive potting the inside of the water surface photovoltaic module junction box.

10. A water surface photovoltaic module, characterized in that the junction box of the water surface photovoltaic module comprises the water surface photovoltaic module junction box of any one of claims 6 to 9, and the water surface photovoltaic module junction box is arranged in a bus bar area of a front surface of the water surface photovoltaic module, where no battery piece is paved.